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Pull google/benchmark library to the LLVM tree

Browse Source 
This patch pulls google/benchmark v1.4.1 into the LLVM tree so that any
project could use it for benchmark generation. A dummy benchmark is
added to `llvm/benchmarks/DummyYAML.cpp` to validate the correctness of
the build process.

The current version does not utilize LLVM LNT and LLVM CMake
infrastructure, but that might be sufficient for most users. Two
introduced CMake variables:

* `LLVM_INCLUDE_BENCHMARKS` (`ON` by default) generates benchmark
  targets
* `LLVM_BUILD_BENCHMARKS` (`OFF` by default) adds generated
  benchmark targets to the list of default LLVM targets (i.e. if `ON`
  benchmarks will be built upon standard build invocation, e.g. `ninja` or
  `make` with no specific targets)

List of modifications:

* `BENCHMARK_ENABLE_TESTING` is disabled
* `BENCHMARK_ENABLE_EXCEPTIONS` is disabled
* `BENCHMARK_ENABLE_INSTALL` is disabled
* `BENCHMARK_ENABLE_GTEST_TESTS` is disabled
* `BENCHMARK_DOWNLOAD_DEPENDENCIES` is disabled

Original discussion can be found here:
http://lists.llvm.org/pipermail/llvm-dev/2018-August/125023.html

Reviewed by: dberris, lebedev.ri

Subscribers: ilya-biryukov, ioeric, EricWF, lebedev.ri, srhines,
dschuff, mgorny, krytarowski, fedor.sergeev, mgrang, jfb, llvm-commits

Differential Revision: https://reviews.llvm.org/D50894

llvm-svn: 340809
This commit is contained in:
Kirill Bobyrev 2018-08-28 09:42:41 +00:00
parent b4a8cdeb02
commit 0f55045526
106 changed files with 14142 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
CMakeLists.txt
View File

@ -493,6 +493,10 @@ option(LLVM_BUILD_TESTS
option(LLVM_INCLUDE_TESTS "Generate build targets for the LLVM unit tests." ON)
option(LLVM_INCLUDE_GO_TESTS "Include the Go bindings tests in test build targets." ON)
option(LLVM_BUILD_BENCHMARKS "Add LLVM benchmark targets to the list of default
targets. If OFF, benchmarks still could be built using Benchmarks target." OFF)
option(LLVM_INCLUDE_BENCHMARKS "Generate benchmark targets. If OFF, benchmarks can't be built." ON)
option (LLVM_BUILD_DOCS "Build the llvm documentation." OFF)
option (LLVM_INCLUDE_DOCS "Generate build targets for llvm documentation." ON)
option (LLVM_ENABLE_DOXYGEN "Use doxygen to generate llvm API documentation." OFF)
@ -1013,3 +1017,16 @@ endif()
if (MSVC AND CMAKE_HOST_SYSTEM_NAME STREQUAL "Windows" AND CMAKE_INSTALL_UCRT_LIBRARIES)
include(InstallRequiredSystemLibraries)
endif()
if (LLVM_INCLUDE_BENCHMARKS)
# Override benchmark defaults so that when the library itself is updated these
# modifications are not lost.
set(BENCHMARK_ENABLE_TESTING OFF CACHE BOOL "Disable benchmark testing" FORCE)
set(BENCHMARK_ENABLE_EXCEPTIONS OFF CACHE BOOL "Disable benchmark exceptions" FORCE)
set(BENCHMARK_ENABLE_INSTALL OFF CACHE BOOL "Don't install benchmark" FORCE)
set(BENCHMARK_DOWNLOAD_DEPENDENCIES OFF CACHE BOOL "Don't download dependencies" FORCE)
set(BENCHMARK_ENABLE_GTEST_TESTS OFF CACHE BOOL "Disable Google Test in benchmark" FORCE)
add_subdirectory(utils/benchmark)
add_subdirectory(benchmarks)
endif()

4
benchmarks/CMakeLists.txt Normal file
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@ -0,0 +1,4 @@
set(LLVM_LINK_COMPONENTS
Support)
add_benchmark(DummyYAML DummyYAML.cpp)

13
benchmarks/DummyYAML.cpp Normal file
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@ -0,0 +1,13 @@
#include "benchmark/benchmark.h"
#include "llvm/Support/YAMLTraits.h"
static void BM_YAMLDummyIsNumeric(benchmark::State& state) {
std::string x = "hello";
for (auto _ : state) {
std::string copy(x);
llvm::yaml::isNumeric(copy);
}
}
BENCHMARK(BM_YAMLDummyIsNumeric);
BENCHMARK_MAIN();

14
cmake/modules/AddLLVM.cmake
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@ -1084,7 +1084,7 @@ function(add_unittest test_suite test_name)
# Our current version of gtest does not properly recognize C++11 support
# with MSVC, so it falls back to tr1 / experimental classes. Since LLVM
# itself requires C++11, we can safely force it on unconditionally so that
# we don't have to fight with the buggy gtest check.
# we don't have to fight with the buggy gtest check.
add_definitions(-DGTEST_LANG_CXX11=1)
add_definitions(-DGTEST_HAS_TR1_TUPLE=0)
@ -1120,6 +1120,18 @@ function(add_unittest test_suite test_name)
endif ()
endfunction()
# Generic support for adding a benchmark.
function(add_benchmark benchmark_name)
if( NOT LLVM_BUILD_BENCHMARKS )
set(EXCLUDE_FROM_ALL ON)
endif()
add_llvm_executable(${benchmark_name} IGNORE_EXTERNALIZE_DEBUGINFO NO_INSTALL_RPATH ${ARGN})
set(outdir ${CMAKE_CURRENT_BINARY_DIR}/${CMAKE_CFG_INTDIR})
set_output_directory(${benchmark_name} BINARY_DIR ${outdir} LIBRARY_DIR ${outdir})
target_link_libraries(${benchmark_name} PRIVATE benchmark)
endfunction()
function(llvm_add_go_executable binary pkgpath)
cmake_parse_arguments(ARG "ALL" "" "DEPENDS;GOFLAGS" ${ARGN})

6
docs/CMake.rst
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@ -250,6 +250,12 @@ LLVM-specific variables
this option to disable the generation of build targets for the LLVM unit
tests.
**LLVM_BUILD_BENCHMARKS**:BOOL
Adds benchmarks to the list of default targets. Defaults to OFF.
**LLVM_INCLUDE_BENCHMARKS**:BOOL
Generate build targets for the LLVM benchmarks. Defaults to ON.
**LLVM_APPEND_VC_REV**:BOOL
Embed version control revision info (svn revision number or Git revision id).
The version info is provided by the ``LLVM_REVISION`` macro in

46
utils/benchmark/AUTHORS Normal file
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@ -0,0 +1,46 @@
# This is the official list of benchmark authors for copyright purposes.
# This file is distinct from the CONTRIBUTORS files.
# See the latter for an explanation.
#
# Names should be added to this file as:
# Name or Organization <email address>
# The email address is not required for organizations.
#
# Please keep the list sorted.
Albert Pretorius <pretoalb@gmail.com>
Arne Beer <arne@twobeer.de>
Carto
Christopher Seymour <chris.j.seymour@hotmail.com>
David Coeurjolly <david.coeurjolly@liris.cnrs.fr>
Deniz Evrenci <denizevrenci@gmail.com>
Dirac Research
Dominik Czarnota <dominik.b.czarnota@gmail.com>
Eric Fiselier <eric@efcs.ca>
Eugene Zhuk <eugene.zhuk@gmail.com>
Evgeny Safronov <division494@gmail.com>
Felix Homann <linuxaudio@showlabor.de>
Google Inc.
International Business Machines Corporation
Ismael Jimenez Martinez <ismael.jimenez.martinez@gmail.com>
Jern-Kuan Leong <jernkuan@gmail.com>
JianXiong Zhou <zhoujianxiong2@gmail.com>
Joao Paulo Magalhaes <joaoppmagalhaes@gmail.com>
Jussi Knuuttila <jussi.knuuttila@gmail.com>
Kaito Udagawa <umireon@gmail.com>
Kishan Kumar <kumar.kishan@outlook.com>
Lei Xu <eddyxu@gmail.com>
Matt Clarkson <mattyclarkson@gmail.com>
Maxim Vafin <maxvafin@gmail.com>
MongoDB Inc.
Nick Hutchinson <nshutchinson@gmail.com>
Oleksandr Sochka <sasha.sochka@gmail.com>
Paul Redmond <paul.redmond@gmail.com>
Radoslav Yovchev <radoslav.tm@gmail.com>
Roman Lebedev <lebedev.ri@gmail.com>
Shuo Chen <chenshuo@chenshuo.com>
Steinar H. Gunderson <sgunderson@bigfoot.com>
Stripe, Inc.
Yixuan Qiu <yixuanq@gmail.com>
Yusuke Suzuki <utatane.tea@gmail.com>
Zbigniew Skowron <zbychs@gmail.com>

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@ -0,0 +1,252 @@
cmake_minimum_required (VERSION 2.8.12)
project (benchmark)
foreach(p
CMP0054 # CMake 3.1
CMP0056 # export EXE_LINKER_FLAGS to try_run
CMP0057 # Support no if() IN_LIST operator
)
if(POLICY ${p})
cmake_policy(SET ${p} NEW)
endif()
endforeach()
option(BENCHMARK_ENABLE_TESTING "Enable testing of the benchmark library." ON)
option(BENCHMARK_ENABLE_EXCEPTIONS "Enable the use of exceptions in the benchmark library." ON)
option(BENCHMARK_ENABLE_LTO "Enable link time optimisation of the benchmark library." OFF)
option(BENCHMARK_USE_LIBCXX "Build and test using libc++ as the standard library." OFF)
option(BENCHMARK_BUILD_32_BITS "Build a 32 bit version of the library." OFF)
option(BENCHMARK_ENABLE_INSTALL "Enable installation of benchmark. (Projects embedding benchmark may want to turn this OFF.)" ON)
# Allow unmet dependencies to be met using CMake's ExternalProject mechanics, which
# may require downloading the source code.
option(BENCHMARK_DOWNLOAD_DEPENDENCIES "Allow the downloading and in-tree building of unmet dependencies" OFF)
# This option can be used to disable building and running unit tests which depend on gtest
# in cases where it is not possible to build or find a valid version of gtest.
option(BENCHMARK_ENABLE_GTEST_TESTS "Enable building the unit tests which depend on gtest" OFF)
set(ENABLE_ASSEMBLY_TESTS_DEFAULT OFF)
function(should_enable_assembly_tests)
if(CMAKE_BUILD_TYPE)
string(TOLOWER ${CMAKE_BUILD_TYPE} CMAKE_BUILD_TYPE_LOWER)
if (${CMAKE_BUILD_TYPE_LOWER} MATCHES "coverage")
# FIXME: The --coverage flag needs to be removed when building assembly
# tests for this to work.
return()
endif()
endif()
if (MSVC)
return()
elseif(NOT CMAKE_SYSTEM_PROCESSOR MATCHES "x86_64")
return()
elseif(NOT CMAKE_SIZEOF_VOID_P EQUAL 8)
# FIXME: Make these work on 32 bit builds
return()
elseif(BENCHMARK_BUILD_32_BITS)
# FIXME: Make these work on 32 bit builds
return()
endif()
find_program(LLVM_FILECHECK_EXE FileCheck)
if (LLVM_FILECHECK_EXE)
set(LLVM_FILECHECK_EXE "${LLVM_FILECHECK_EXE}" CACHE PATH "llvm filecheck" FORCE)
message(STATUS "LLVM FileCheck Found: ${LLVM_FILECHECK_EXE}")
else()
message(STATUS "Failed to find LLVM FileCheck")
return()
endif()
set(ENABLE_ASSEMBLY_TESTS_DEFAULT ON PARENT_SCOPE)
endfunction()
should_enable_assembly_tests()
# This option disables the building and running of the assembly verification tests
option(BENCHMARK_ENABLE_ASSEMBLY_TESTS "Enable building and running the assembly tests"
${ENABLE_ASSEMBLY_TESTS_DEFAULT})
# Make sure we can import out CMake functions
list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake/Modules")
list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake")
# Read the git tags to determine the project version
include(GetGitVersion)
get_git_version(GIT_VERSION)
# Tell the user what versions we are using
string(REGEX MATCH "[0-9]+\\.[0-9]+\\.[0-9]+" VERSION ${GIT_VERSION})
message("-- Version: ${VERSION}")
# The version of the libraries
set(GENERIC_LIB_VERSION ${VERSION})
string(SUBSTRING ${VERSION} 0 1 GENERIC_LIB_SOVERSION)
# Import our CMake modules
include(CheckCXXCompilerFlag)
include(AddCXXCompilerFlag)
include(CXXFeatureCheck)
if (BENCHMARK_BUILD_32_BITS)
add_required_cxx_compiler_flag(-m32)
endif()
if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")
# Turn compiler warnings up to 11
string(REGEX REPLACE "[-/]W[1-4]" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /W4")
add_definitions(-D_CRT_SECURE_NO_WARNINGS)
if (NOT BENCHMARK_ENABLE_EXCEPTIONS)
add_cxx_compiler_flag(-EHs-)
add_cxx_compiler_flag(-EHa-)
endif()
# Link time optimisation
if (BENCHMARK_ENABLE_LTO)
set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} /GL")
set(CMAKE_STATIC_LINKER_FLAGS_RELEASE "${CMAKE_STATIC_LINKER_FLAGS_RELEASE} /LTCG")
set(CMAKE_SHARED_LINKER_FLAGS_RELEASE "${CMAKE_SHARED_LINKER_FLAGS_RELEASE} /LTCG")
set(CMAKE_EXE_LINKER_FLAGS_RELEASE "${CMAKE_EXE_LINKER_FLAGS_RELEASE} /LTCG")
set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO} /GL")
string(REGEX REPLACE "[-/]INCREMENTAL" "/INCREMENTAL:NO" CMAKE_STATIC_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_STATIC_LINKER_FLAGS_RELWITHDEBINFO}")
set(CMAKE_STATIC_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_STATIC_LINKER_FLAGS_RELWITHDEBINFO} /LTCG")
string(REGEX REPLACE "[-/]INCREMENTAL" "/INCREMENTAL:NO" CMAKE_SHARED_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_SHARED_LINKER_FLAGS_RELWITHDEBINFO}")
set(CMAKE_SHARED_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_SHARED_LINKER_FLAGS_RELWITHDEBINFO} /LTCG")
string(REGEX REPLACE "[-/]INCREMENTAL" "/INCREMENTAL:NO" CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO}")
set(CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO} /LTCG")
set(CMAKE_CXX_FLAGS_MINSIZEREL "${CMAKE_CXX_FLAGS_MINSIZEREL} /GL")
set(CMAKE_STATIC_LINKER_FLAGS_MINSIZEREL "${CMAKE_STATIC_LINKER_FLAGS_MINSIZEREL} /LTCG")
set(CMAKE_SHARED_LINKER_FLAGS_MINSIZEREL "${CMAKE_SHARED_LINKER_FLAGS_MINSIZEREL} /LTCG")
set(CMAKE_EXE_LINKER_FLAGS_MINSIZEREL "${CMAKE_EXE_LINKER_FLAGS_MINSIZEREL} /LTCG")
endif()
else()
# Try and enable C++11. Don't use C++14 because it doesn't work in some
# configurations.
add_cxx_compiler_flag(-std=c++11)
if (NOT HAVE_CXX_FLAG_STD_CXX11)
add_cxx_compiler_flag(-std=c++0x)
endif()
# Turn compiler warnings up to 11
add_cxx_compiler_flag(-Wall)
add_cxx_compiler_flag(-Wextra)
add_cxx_compiler_flag(-Wshadow)
# FIXME(kbobyrev): Document this change.
# add_cxx_compiler_flag(-Werror RELEASE)
# add_cxx_compiler_flag(-Werror RELWITHDEBINFO)
# add_cxx_compiler_flag(-Werror MINSIZEREL)
add_cxx_compiler_flag(-pedantic)
add_cxx_compiler_flag(-pedantic-errors)
add_cxx_compiler_flag(-Wshorten-64-to-32)
add_cxx_compiler_flag(-Wfloat-equal)
add_cxx_compiler_flag(-fstrict-aliasing)
if (NOT BENCHMARK_ENABLE_EXCEPTIONS)
add_cxx_compiler_flag(-fno-exceptions)
endif()
if (HAVE_CXX_FLAG_FSTRICT_ALIASING)
if (NOT CMAKE_CXX_COMPILER_ID STREQUAL "Intel") #ICC17u2: Many false positives for Wstrict-aliasing
add_cxx_compiler_flag(-Wstrict-aliasing)
endif()
endif()
# ICC17u2: overloaded virtual function "benchmark::Fixture::SetUp" is only partially overridden
# (because of deprecated overload)
add_cxx_compiler_flag(-wd654)
add_cxx_compiler_flag(-Wthread-safety)
if (HAVE_CXX_FLAG_WTHREAD_SAFETY)
cxx_feature_check(THREAD_SAFETY_ATTRIBUTES)
endif()
# On most UNIX like platforms g++ and clang++ define _GNU_SOURCE as a
# predefined macro, which turns on all of the wonderful libc extensions.
# However g++ doesn't do this in Cygwin so we have to define it ourselfs
# since we depend on GNU/POSIX/BSD extensions.
if (CYGWIN)
add_definitions(-D_GNU_SOURCE=1)
endif()
# Link time optimisation
if (BENCHMARK_ENABLE_LTO)
add_cxx_compiler_flag(-flto)
if ("${CMAKE_C_COMPILER_ID}" STREQUAL "GNU")
find_program(GCC_AR gcc-ar)
if (GCC_AR)
set(CMAKE_AR ${GCC_AR})
endif()
find_program(GCC_RANLIB gcc-ranlib)
if (GCC_RANLIB)
set(CMAKE_RANLIB ${GCC_RANLIB})
endif()
elseif("${CMAKE_C_COMPILER_ID}" STREQUAL "Clang")
include(llvm-toolchain)
endif()
endif()
# Coverage build type
set(BENCHMARK_CXX_FLAGS_COVERAGE "${CMAKE_CXX_FLAGS_DEBUG}"
CACHE STRING "Flags used by the C++ compiler during coverage builds."
FORCE)
set(BENCHMARK_EXE_LINKER_FLAGS_COVERAGE "${CMAKE_EXE_LINKER_FLAGS_DEBUG}"
CACHE STRING "Flags used for linking binaries during coverage builds."
FORCE)
set(BENCHMARK_SHARED_LINKER_FLAGS_COVERAGE "${CMAKE_SHARED_LINKER_FLAGS_DEBUG}"
CACHE STRING "Flags used by the shared libraries linker during coverage builds."
FORCE)
mark_as_advanced(
BENCHMARK_CXX_FLAGS_COVERAGE
BENCHMARK_EXE_LINKER_FLAGS_COVERAGE
BENCHMARK_SHARED_LINKER_FLAGS_COVERAGE)
set(CMAKE_BUILD_TYPE "${CMAKE_BUILD_TYPE}" CACHE STRING
"Choose the type of build, options are: None Debug Release RelWithDebInfo MinSizeRel Coverage.")
add_cxx_compiler_flag(--coverage COVERAGE)
endif()
if (BENCHMARK_USE_LIBCXX)
if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
add_cxx_compiler_flag(-stdlib=libc++)
elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU" OR
"${CMAKE_CXX_COMPILER_ID}" STREQUAL "Intel")
add_cxx_compiler_flag(-nostdinc++)
message("libc++ header path must be manually specified using CMAKE_CXX_FLAGS")
# Adding -nodefaultlibs directly to CMAKE_<TYPE>_LINKER_FLAGS will break
# configuration checks such as 'find_package(Threads)'
list(APPEND BENCHMARK_CXX_LINKER_FLAGS -nodefaultlibs)
# -lc++ cannot be added directly to CMAKE_<TYPE>_LINKER_FLAGS because
# linker flags appear before all linker inputs and -lc++ must appear after.
list(APPEND BENCHMARK_CXX_LIBRARIES c++)
else()
message(FATAL_ERROR "-DBENCHMARK_USE_LIBCXX:BOOL=ON is not supported for compiler")
endif()
endif(BENCHMARK_USE_LIBCXX)
# C++ feature checks
# Determine the correct regular expression engine to use
cxx_feature_check(STD_REGEX)
cxx_feature_check(GNU_POSIX_REGEX)
cxx_feature_check(POSIX_REGEX)
if(NOT HAVE_STD_REGEX AND NOT HAVE_GNU_POSIX_REGEX AND NOT HAVE_POSIX_REGEX)
message(FATAL_ERROR "Failed to determine the source files for the regular expression backend")
endif()
if (NOT BENCHMARK_ENABLE_EXCEPTIONS AND HAVE_STD_REGEX
AND NOT HAVE_GNU_POSIX_REGEX AND NOT HAVE_POSIX_REGEX)
message(WARNING "Using std::regex with exceptions disabled is not fully supported")
endif()
cxx_feature_check(STEADY_CLOCK)
# Ensure we have pthreads
find_package(Threads REQUIRED)
# Set up directories
include_directories(${PROJECT_SOURCE_DIR}/include)
# Build the targets
add_subdirectory(src)
if (BENCHMARK_ENABLE_TESTING)
enable_testing()
if (BENCHMARK_ENABLE_GTEST_TESTS)
include(HandleGTest)
endif()
add_subdirectory(test)
endif()

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@ -0,0 +1,58 @@
# How to contribute #
We'd love to accept your patches and contributions to this project. There are
a just a few small guidelines you need to follow.
## Contributor License Agreement ##
Contributions to any Google project must be accompanied by a Contributor
License Agreement. This is not a copyright **assignment**, it simply gives
Google permission to use and redistribute your contributions as part of the
project.
* If you are an individual writing original source code and you're sure you
own the intellectual property, then you'll need to sign an [individual
CLA][].
* If you work for a company that wants to allow you to contribute your work,
then you'll need to sign a [corporate CLA][].
You generally only need to submit a CLA once, so if you've already submitted
one (even if it was for a different project), you probably don't need to do it
again.
[individual CLA]: https://developers.google.com/open-source/cla/individual
[corporate CLA]: https://developers.google.com/open-source/cla/corporate
Once your CLA is submitted (or if you already submitted one for
another Google project), make a commit adding yourself to the
[AUTHORS][] and [CONTRIBUTORS][] files. This commit can be part
of your first [pull request][].
[AUTHORS]: AUTHORS
[CONTRIBUTORS]: CONTRIBUTORS
## Submitting a patch ##
1. It's generally best to start by opening a new issue describing the bug or
feature you're intending to fix. Even if you think it's relatively minor,
it's helpful to know what people are working on. Mention in the initial
issue that you are planning to work on that bug or feature so that it can
be assigned to you.
1. Follow the normal process of [forking][] the project, and setup a new
branch to work in. It's important that each group of changes be done in
separate branches in order to ensure that a pull request only includes the
commits related to that bug or feature.
1. Do your best to have [well-formed commit messages][] for each change.
This provides consistency throughout the project, and ensures that commit
messages are able to be formatted properly by various git tools.
1. Finally, push the commits to your fork and submit a [pull request][].
[forking]: https://help.github.com/articles/fork-a-repo
[well-formed commit messages]: http://tbaggery.com/2008/04/19/a-note-about-git-commit-messages.html
[pull request]: https://help.github.com/articles/creating-a-pull-request

65
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@ -0,0 +1,65 @@
# People who have agreed to one of the CLAs and can contribute patches.
# The AUTHORS file lists the copyright holders; this file
# lists people. For example, Google employees are listed here
# but not in AUTHORS, because Google holds the copyright.
#
# Names should be added to this file only after verifying that
# the individual or the individual's organization has agreed to
# the appropriate Contributor License Agreement, found here:
#
# https://developers.google.com/open-source/cla/individual
# https://developers.google.com/open-source/cla/corporate
#
# The agreement for individuals can be filled out on the web.
#
# When adding J Random Contributor's name to this file,
# either J's name or J's organization's name should be
# added to the AUTHORS file, depending on whether the
# individual or corporate CLA was used.
#
# Names should be added to this file as:
# Name <email address>
#
# Please keep the list sorted.
Albert Pretorius <pretoalb@gmail.com>
Arne Beer <arne@twobeer.de>
Billy Robert O'Neal III <billy.oneal@gmail.com> <bion@microsoft.com>
Chris Kennelly <ckennelly@google.com> <ckennelly@ckennelly.com>
Christopher Seymour <chris.j.seymour@hotmail.com>
David Coeurjolly <david.coeurjolly@liris.cnrs.fr>
Deniz Evrenci <denizevrenci@gmail.com>
Dominic Hamon <dma@stripysock.com> <dominic@google.com>
Dominik Czarnota <dominik.b.czarnota@gmail.com>
Eric Fiselier <eric@efcs.ca>
Eugene Zhuk <eugene.zhuk@gmail.com>
Evgeny Safronov <division494@gmail.com>
Felix Homann <linuxaudio@showlabor.de>
Ismael Jimenez Martinez <ismael.jimenez.martinez@gmail.com>
Jern-Kuan Leong <jernkuan@gmail.com>
JianXiong Zhou <zhoujianxiong2@gmail.com>
Joao Paulo Magalhaes <joaoppmagalhaes@gmail.com>
John Millikin <jmillikin@stripe.com>
Jussi Knuuttila <jussi.knuuttila@gmail.com>
Kai Wolf <kai.wolf@gmail.com>
Kishan Kumar <kumar.kishan@outlook.com>
Kaito Udagawa <umireon@gmail.com>
Lei Xu <eddyxu@gmail.com>
Matt Clarkson <mattyclarkson@gmail.com>
Maxim Vafin <maxvafin@gmail.com>
Nick Hutchinson <nshutchinson@gmail.com>
Oleksandr Sochka <sasha.sochka@gmail.com>
Pascal Leroy <phl@google.com>
Paul Redmond <paul.redmond@gmail.com>
Pierre Phaneuf <pphaneuf@google.com>
Radoslav Yovchev <radoslav.tm@gmail.com>
Raul Marin <rmrodriguez@cartodb.com>
Ray Glover <ray.glover@uk.ibm.com>
Robert Guo <robert.guo@mongodb.com>
Roman Lebedev <lebedev.ri@gmail.com>
Shuo Chen <chenshuo@chenshuo.com>
Tobias Ulvgård <tobias.ulvgard@dirac.se>
Tom Madams <tom.ej.madams@gmail.com> <tmadams@google.com>
Yixuan Qiu <yixuanq@gmail.com>
Yusuke Suzuki <utatane.tea@gmail.com>
Zbigniew Skowron <zbychs@gmail.com>

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@ -0,0 +1,202 @@
Apache License
Version 2.0, January 2004
http://www.apache.org/licenses/
TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
1. Definitions.
"License" shall mean the terms and conditions for use, reproduction,
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LLVM notes
----------
This directory contains the Google Benchmark source code. This directory is
under a different license than LLVM.
Changes:
* Bazel BUILD files are removed from the library

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# benchmark
[![Build Status](https://travis-ci.org/google/benchmark.svg?branch=master)](https://travis-ci.org/google/benchmark)
[![Build status](https://ci.appveyor.com/api/projects/status/u0qsyp7t1tk7cpxs/branch/master?svg=true)](https://ci.appveyor.com/project/google/benchmark/branch/master)
[![Coverage Status](https://coveralls.io/repos/google/benchmark/badge.svg)](https://coveralls.io/r/google/benchmark)
[![slackin](https://slackin-iqtfqnpzxd.now.sh/badge.svg)](https://slackin-iqtfqnpzxd.now.sh/)
A library to support the benchmarking of functions, similar to unit-tests.
Discussion group: https://groups.google.com/d/forum/benchmark-discuss
IRC channel: https://freenode.net #googlebenchmark
[Known issues and common problems](#known-issues)
[Additional Tooling Documentation](docs/tools.md)
[Assembly Testing Documentation](docs/AssemblyTests.md)
## Building
The basic steps for configuring and building the library look like this:
```bash
$ git clone https://github.com/google/benchmark.git
# Benchmark requires Google Test as a dependency. Add the source tree as a subdirectory.
$ git clone https://github.com/google/googletest.git benchmark/googletest
$ mkdir build && cd build
$ cmake -G <generator> [options] ../benchmark
# Assuming a makefile generator was used
$ make
```
Note that Google Benchmark requires Google Test to build and run the tests. This
dependency can be provided two ways:
* Checkout the Google Test sources into `benchmark/googletest` as above.
* Otherwise, if `-DBENCHMARK_DOWNLOAD_DEPENDENCIES=ON` is specified during
configuration, the library will automatically download and build any required
dependencies.
If you do not wish to build and run the tests, add `-DBENCHMARK_ENABLE_GTEST_TESTS=OFF`
to `CMAKE_ARGS`.
## Installation Guide
For Ubuntu and Debian Based System
First make sure you have git and cmake installed (If not please install it)
```
sudo apt-get install git
sudo apt-get install cmake
```
Now, let's clone the repository and build it
```
git clone https://github.com/google/benchmark.git
cd benchmark
git clone https://github.com/google/googletest.git
mkdir build
cd build
cmake .. -DCMAKE_BUILD_TYPE=RELEASE
make
```
We need to install the library globally now
```
sudo make install
```
Now you have google/benchmark installed in your machine
Note: Don't forget to link to pthread library while building
## Stable and Experimental Library Versions
The main branch contains the latest stable version of the benchmarking library;
the API of which can be considered largely stable, with source breaking changes
being made only upon the release of a new major version.
Newer, experimental, features are implemented and tested on the
[`v2` branch](https://github.com/google/benchmark/tree/v2). Users who wish
to use, test, and provide feedback on the new features are encouraged to try
this branch. However, this branch provides no stability guarantees and reserves
the right to change and break the API at any time.
##Prerequisite knowledge
Before attempting to understand this framework one should ideally have some familiarity with the structure and format of the Google Test framework, upon which it is based. Documentation for Google Test, including a "Getting Started" (primer) guide, is available here:
https://github.com/google/googletest/blob/master/googletest/docs/Documentation.md
## Example usage
### Basic usage
Define a function that executes the code to be measured.
```c++
#include <benchmark/benchmark.h>
static void BM_StringCreation(benchmark::State& state) {
for (auto _ : state)
std::string empty_string;
}
// Register the function as a benchmark
BENCHMARK(BM_StringCreation);
// Define another benchmark
static void BM_StringCopy(benchmark::State& state) {
std::string x = "hello";
for (auto _ : state)
std::string copy(x);
}
BENCHMARK(BM_StringCopy);
BENCHMARK_MAIN();
```
Don't forget to inform your linker to add benchmark library e.g. through
`-lbenchmark` compilation flag. Alternatively, you may leave out the
`BENCHMARK_MAIN();` at the end of the source file and link against
`-lbenchmark_main` to get the same default behavior.
The benchmark library will reporting the timing for the code within the `for(...)` loop.
### Passing arguments
Sometimes a family of benchmarks can be implemented with just one routine that
takes an extra argument to specify which one of the family of benchmarks to
run. For example, the following code defines a family of benchmarks for
measuring the speed of `memcpy()` calls of different lengths:
```c++
static void BM_memcpy(benchmark::State& state) {
char* src = new char[state.range(0)];
char* dst = new char[state.range(0)];
memset(src, 'x', state.range(0));
for (auto _ : state)
memcpy(dst, src, state.range(0));
state.SetBytesProcessed(int64_t(state.iterations()) *
int64_t(state.range(0)));
delete[] src;
delete[] dst;
}
BENCHMARK(BM_memcpy)->Arg(8)->Arg(64)->Arg(512)->Arg(1<<10)->Arg(8<<10);
```
The preceding code is quite repetitive, and can be replaced with the following
short-hand. The following invocation will pick a few appropriate arguments in
the specified range and will generate a benchmark for each such argument.
```c++
BENCHMARK(BM_memcpy)->Range(8, 8<<10);
```
By default the arguments in the range are generated in multiples of eight and
the command above selects [ 8, 64, 512, 4k, 8k ]. In the following code the
range multiplier is changed to multiples of two.
```c++
BENCHMARK(BM_memcpy)->RangeMultiplier(2)->Range(8, 8<<10);
```
Now arguments generated are [ 8, 16, 32, 64, 128, 256, 512, 1024, 2k, 4k, 8k ].
You might have a benchmark that depends on two or more inputs. For example, the
following code defines a family of benchmarks for measuring the speed of set
insertion.
```c++
static void BM_SetInsert(benchmark::State& state) {
std::set<int> data;
for (auto _ : state) {
state.PauseTiming();
data = ConstructRandomSet(state.range(0));
state.ResumeTiming();
for (int j = 0; j < state.range(1); ++j)
data.insert(RandomNumber());
}
}
BENCHMARK(BM_SetInsert)
->Args({1<<10, 128})
->Args({2<<10, 128})
->Args({4<<10, 128})
->Args({8<<10, 128})
->Args({1<<10, 512})
->Args({2<<10, 512})
->Args({4<<10, 512})
->Args({8<<10, 512});
```
The preceding code is quite repetitive, and can be replaced with the following
short-hand. The following macro will pick a few appropriate arguments in the
product of the two specified ranges and will generate a benchmark for each such
pair.
```c++
BENCHMARK(BM_SetInsert)->Ranges({{1<<10, 8<<10}, {128, 512}});
```
For more complex patterns of inputs, passing a custom function to `Apply` allows
programmatic specification of an arbitrary set of arguments on which to run the
benchmark. The following example enumerates a dense range on one parameter,
and a sparse range on the second.
```c++
static void CustomArguments(benchmark::internal::Benchmark* b) {
for (int i = 0; i <= 10; ++i)
for (int j = 32; j <= 1024*1024; j *= 8)
b->Args({i, j});
}
BENCHMARK(BM_SetInsert)->Apply(CustomArguments);
```
### Calculate asymptotic complexity (Big O)
Asymptotic complexity might be calculated for a family of benchmarks. The
following code will calculate the coefficient for the high-order term in the
running time and the normalized root-mean square error of string comparison.
```c++
static void BM_StringCompare(benchmark::State& state) {
std::string s1(state.range(0), '-');
std::string s2(state.range(0), '-');
for (auto _ : state) {
benchmark::DoNotOptimize(s1.compare(s2));
}
state.SetComplexityN(state.range(0));
}
BENCHMARK(BM_StringCompare)
->RangeMultiplier(2)->Range(1<<10, 1<<18)->Complexity(benchmark::oN);
```
As shown in the following invocation, asymptotic complexity might also be
calculated automatically.
```c++
BENCHMARK(BM_StringCompare)
->RangeMultiplier(2)->Range(1<<10, 1<<18)->Complexity();
```
The following code will specify asymptotic complexity with a lambda function,
that might be used to customize high-order term calculation.
```c++
BENCHMARK(BM_StringCompare)->RangeMultiplier(2)
->Range(1<<10, 1<<18)->Complexity([](int n)->double{return n; });
```
### Templated benchmarks
Templated benchmarks work the same way: This example produces and consumes
messages of size `sizeof(v)` `range_x` times. It also outputs throughput in the
absence of multiprogramming.
```c++
template <class Q> int BM_Sequential(benchmark::State& state) {
Q q;
typename Q::value_type v;
for (auto _ : state) {
for (int i = state.range(0); i--; )
q.push(v);
for (int e = state.range(0); e--; )
q.Wait(&v);
}
// actually messages, not bytes:
state.SetBytesProcessed(
static_cast<int64_t>(state.iterations())*state.range(0));
}
BENCHMARK_TEMPLATE(BM_Sequential, WaitQueue<int>)->Range(1<<0, 1<<10);
```
Three macros are provided for adding benchmark templates.
```c++
#ifdef BENCHMARK_HAS_CXX11
#define BENCHMARK_TEMPLATE(func, ...) // Takes any number of parameters.
#else // C++ < C++11
#define BENCHMARK_TEMPLATE(func, arg1)
#endif
#define BENCHMARK_TEMPLATE1(func, arg1)
#define BENCHMARK_TEMPLATE2(func, arg1, arg2)
```
### A Faster KeepRunning loop
In C++11 mode, a ranged-based for loop should be used in preference to
the `KeepRunning` loop for running the benchmarks. For example:
```c++
static void BM_Fast(benchmark::State &state) {
for (auto _ : state) {
FastOperation();
}
}
BENCHMARK(BM_Fast);
```
The reason the ranged-for loop is faster than using `KeepRunning`, is
because `KeepRunning` requires a memory load and store of the iteration count
ever iteration, whereas the ranged-for variant is able to keep the iteration count
in a register.
For example, an empty inner loop of using the ranged-based for method looks like:
```asm
# Loop Init
mov rbx, qword ptr [r14 + 104]
call benchmark::State::StartKeepRunning()
test rbx, rbx
je .LoopEnd
.LoopHeader: # =>This Inner Loop Header: Depth=1
add rbx, -1
jne .LoopHeader
.LoopEnd:
```
Compared to an empty `KeepRunning` loop, which looks like:
```asm
.LoopHeader: # in Loop: Header=BB0_3 Depth=1
cmp byte ptr [rbx], 1
jne .LoopInit
.LoopBody: # =>This Inner Loop Header: Depth=1
mov rax, qword ptr [rbx + 8]
lea rcx, [rax + 1]
mov qword ptr [rbx + 8], rcx
cmp rax, qword ptr [rbx + 104]
jb .LoopHeader
jmp .LoopEnd
.LoopInit:
mov rdi, rbx
call benchmark::State::StartKeepRunning()
jmp .LoopBody
.LoopEnd:
```
Unless C++03 compatibility is required, the ranged-for variant of writing
the benchmark loop should be preferred.
## Passing arbitrary arguments to a benchmark
In C++11 it is possible to define a benchmark that takes an arbitrary number
of extra arguments. The `BENCHMARK_CAPTURE(func, test_case_name, ...args)`
macro creates a benchmark that invokes `func` with the `benchmark::State` as
the first argument followed by the specified `args...`.
The `test_case_name` is appended to the name of the benchmark and
should describe the values passed.
```c++
template <class ...ExtraArgs>
void BM_takes_args(benchmark::State& state, ExtraArgs&&... extra_args) {
[...]
}
// Registers a benchmark named "BM_takes_args/int_string_test" that passes
// the specified values to `extra_args`.
BENCHMARK_CAPTURE(BM_takes_args, int_string_test, 42, std::string("abc"));
```
Note that elements of `...args` may refer to global variables. Users should
avoid modifying global state inside of a benchmark.
## Using RegisterBenchmark(name, fn, args...)
The `RegisterBenchmark(name, func, args...)` function provides an alternative
way to create and register benchmarks.
`RegisterBenchmark(name, func, args...)` creates, registers, and returns a
pointer to a new benchmark with the specified `name` that invokes
`func(st, args...)` where `st` is a `benchmark::State` object.
Unlike the `BENCHMARK` registration macros, which can only be used at the global
scope, the `RegisterBenchmark` can be called anywhere. This allows for
benchmark tests to be registered programmatically.
Additionally `RegisterBenchmark` allows any callable object to be registered
as a benchmark. Including capturing lambdas and function objects.
For Example:
```c++
auto BM_test = [](benchmark::State& st, auto Inputs) { /* ... */ };
int main(int argc, char** argv) {
for (auto& test_input : { /* ... */ })
benchmark::RegisterBenchmark(test_input.name(), BM_test, test_input);
benchmark::Initialize(&argc, argv);
benchmark::RunSpecifiedBenchmarks();
}
```
### Multithreaded benchmarks
In a multithreaded test (benchmark invoked by multiple threads simultaneously),
it is guaranteed that none of the threads will start until all have reached
the start of the benchmark loop, and all will have finished before any thread
exits the benchmark loop. (This behavior is also provided by the `KeepRunning()`
API) As such, any global setup or teardown can be wrapped in a check against the thread
index:
```c++
static void BM_MultiThreaded(benchmark::State& state) {
if (state.thread_index == 0) {
// Setup code here.
}
for (auto _ : state) {
// Run the test as normal.
}
if (state.thread_index == 0) {
// Teardown code here.
}
}
BENCHMARK(BM_MultiThreaded)->Threads(2);
```
If the benchmarked code itself uses threads and you want to compare it to
single-threaded code, you may want to use real-time ("wallclock") measurements
for latency comparisons:
```c++
BENCHMARK(BM_test)->Range(8, 8<<10)->UseRealTime();
```
Without `UseRealTime`, CPU time is used by default.
## Manual timing
For benchmarking something for which neither CPU time nor real-time are
correct or accurate enough, completely manual timing is supported using
the `UseManualTime` function.
When `UseManualTime` is used, the benchmarked code must call
`SetIterationTime` once per iteration of the benchmark loop to
report the manually measured time.
An example use case for this is benchmarking GPU execution (e.g. OpenCL
or CUDA kernels, OpenGL or Vulkan or Direct3D draw calls), which cannot
be accurately measured using CPU time or real-time. Instead, they can be
measured accurately using a dedicated API, and these measurement results
can be reported back with `SetIterationTime`.
```c++
static void BM_ManualTiming(benchmark::State& state) {
int microseconds = state.range(0);
std::chrono::duration<double, std::micro> sleep_duration {
static_cast<double>(microseconds)
};
for (auto _ : state) {
auto start = std::chrono::high_resolution_clock::now();
// Simulate some useful workload with a sleep
std::this_thread::sleep_for(sleep_duration);
auto end = std::chrono::high_resolution_clock::now();
auto elapsed_seconds =
std::chrono::duration_cast<std::chrono::duration<double>>(
end - start);
state.SetIterationTime(elapsed_seconds.count());
}
}
BENCHMARK(BM_ManualTiming)->Range(1, 1<<17)->UseManualTime();
```
### Preventing optimisation
To prevent a value or expression from being optimized away by the compiler
the `benchmark::DoNotOptimize(...)` and `benchmark::ClobberMemory()`
functions can be used.
```c++
static void BM_test(benchmark::State& state) {
for (auto _ : state) {
int x = 0;
for (int i=0; i < 64; ++i) {
benchmark::DoNotOptimize(x += i);
}
}
}
```
`DoNotOptimize(<expr>)` forces the *result* of `<expr>` to be stored in either
memory or a register. For GNU based compilers it acts as read/write barrier
for global memory. More specifically it forces the compiler to flush pending
writes to memory and reload any other values as necessary.
Note that `DoNotOptimize(<expr>)` does not prevent optimizations on `<expr>`
in any way. `<expr>` may even be removed entirely when the result is already
known. For example:
```c++
/* Example 1: `<expr>` is removed entirely. */
int foo(int x) { return x + 42; }
while (...) DoNotOptimize(foo(0)); // Optimized to DoNotOptimize(42);
/* Example 2: Result of '<expr>' is only reused */
int bar(int) __attribute__((const));
while (...) DoNotOptimize(bar(0)); // Optimized to:
// int __result__ = bar(0);
// while (...) DoNotOptimize(__result__);
```
The second tool for preventing optimizations is `ClobberMemory()`. In essence
`ClobberMemory()` forces the compiler to perform all pending writes to global
memory. Memory managed by block scope objects must be "escaped" using
`DoNotOptimize(...)` before it can be clobbered. In the below example
`ClobberMemory()` prevents the call to `v.push_back(42)` from being optimized
away.
```c++
static void BM_vector_push_back(benchmark::State& state) {
for (auto _ : state) {
std::vector<int> v;
v.reserve(1);
benchmark::DoNotOptimize(v.data()); // Allow v.data() to be clobbered.
v.push_back(42);
benchmark::ClobberMemory(); // Force 42 to be written to memory.
}
}
```
Note that `ClobberMemory()` is only available for GNU or MSVC based compilers.
### Set time unit manually
If a benchmark runs a few milliseconds it may be hard to visually compare the
measured times, since the output data is given in nanoseconds per default. In
order to manually set the time unit, you can specify it manually:
```c++
BENCHMARK(BM_test)->Unit(benchmark::kMillisecond);
```
## Controlling number of iterations
In all cases, the number of iterations for which the benchmark is run is
governed by the amount of time the benchmark takes. Concretely, the number of
iterations is at least one, not more than 1e9, until CPU time is greater than
the minimum time, or the wallclock time is 5x minimum time. The minimum time is
set as a flag `--benchmark_min_time` or per benchmark by calling `MinTime` on
the registered benchmark object.
## Reporting the mean, median and standard deviation by repeated benchmarks
By default each benchmark is run once and that single result is reported.
However benchmarks are often noisy and a single result may not be representative
of the overall behavior. For this reason it's possible to repeatedly rerun the
benchmark.
The number of runs of each benchmark is specified globally by the
`--benchmark_repetitions` flag or on a per benchmark basis by calling
`Repetitions` on the registered benchmark object. When a benchmark is run more
than once the mean, median and standard deviation of the runs will be reported.
Additionally the `--benchmark_report_aggregates_only={true|false}` flag or
`ReportAggregatesOnly(bool)` function can be used to change how repeated tests
are reported. By default the result of each repeated run is reported. When this
option is `true` only the mean, median and standard deviation of the runs is reported.
Calling `ReportAggregatesOnly(bool)` on a registered benchmark object overrides
the value of the flag for that benchmark.
## User-defined statistics for repeated benchmarks
While having mean, median and standard deviation is nice, this may not be
enough for everyone. For example you may want to know what is the largest
observation, e.g. because you have some real-time constraints. This is easy.
The following code will specify a custom statistic to be calculated, defined
by a lambda function.
```c++
void BM_spin_empty(benchmark::State& state) {
for (auto _ : state) {
for (int x = 0; x < state.range(0); ++x) {
benchmark::DoNotOptimize(x);
}
}
}
BENCHMARK(BM_spin_empty)
->ComputeStatistics("max", [](const std::vector<double>& v) -> double {
return *(std::max_element(std::begin(v), std::end(v)));
})
->Arg(512);
```
## Fixtures
Fixture tests are created by
first defining a type that derives from `::benchmark::Fixture` and then
creating/registering the tests using the following macros:
* `BENCHMARK_F(ClassName, Method)`
* `BENCHMARK_DEFINE_F(ClassName, Method)`
* `BENCHMARK_REGISTER_F(ClassName, Method)`
For Example:
```c++
class MyFixture : public benchmark::Fixture {};
BENCHMARK_F(MyFixture, FooTest)(benchmark::State& st) {
for (auto _ : st) {
...
}
}
BENCHMARK_DEFINE_F(MyFixture, BarTest)(benchmark::State& st) {
for (auto _ : st) {
...
}
}
/* BarTest is NOT registered */
BENCHMARK_REGISTER_F(MyFixture, BarTest)->Threads(2);
/* BarTest is now registered */
```
### Templated fixtures
Also you can create templated fixture by using the following macros:
* `BENCHMARK_TEMPLATE_F(ClassName, Method, ...)`
* `BENCHMARK_TEMPLATE_DEFINE_F(ClassName, Method, ...)`
For example:
```c++
template<typename T>
class MyFixture : public benchmark::Fixture {};
BENCHMARK_TEMPLATE_F(MyFixture, IntTest, int)(benchmark::State& st) {
for (auto _ : st) {
...
}
}
BENCHMARK_TEMPLATE_DEFINE_F(MyFixture, DoubleTest, double)(benchmark::State& st) {
for (auto _ : st) {
...
}
}
BENCHMARK_REGISTER_F(MyFixture, DoubleTest)->Threads(2);
```
## User-defined counters
You can add your own counters with user-defined names. The example below
will add columns "Foo", "Bar" and "Baz" in its output:
```c++
static void UserCountersExample1(benchmark::State& state) {
double numFoos = 0, numBars = 0, numBazs = 0;
for (auto _ : state) {
// ... count Foo,Bar,Baz events
}
state.counters["Foo"] = numFoos;
state.counters["Bar"] = numBars;
state.counters["Baz"] = numBazs;
}
```
The `state.counters` object is a `std::map` with `std::string` keys
and `Counter` values. The latter is a `double`-like class, via an implicit
conversion to `double&`. Thus you can use all of the standard arithmetic
assignment operators (`=,+=,-=,*=,/=`) to change the value of each counter.
In multithreaded benchmarks, each counter is set on the calling thread only.
When the benchmark finishes, the counters from each thread will be summed;
the resulting sum is the value which will be shown for the benchmark.
The `Counter` constructor accepts two parameters: the value as a `double`
and a bit flag which allows you to show counters as rates and/or as
per-thread averages:
```c++
// sets a simple counter
state.counters["Foo"] = numFoos;
// Set the counter as a rate. It will be presented divided
// by the duration of the benchmark.
state.counters["FooRate"] = Counter(numFoos, benchmark::Counter::kIsRate);
// Set the counter as a thread-average quantity. It will
// be presented divided by the number of threads.
state.counters["FooAvg"] = Counter(numFoos, benchmark::Counter::kAvgThreads);
// There's also a combined flag:
state.counters["FooAvgRate"] = Counter(numFoos,benchmark::Counter::kAvgThreadsRate);
```
When you're compiling in C++11 mode or later you can use `insert()` with
`std::initializer_list`:
```c++
// With C++11, this can be done:
state.counters.insert({{"Foo", numFoos}, {"Bar", numBars}, {"Baz", numBazs}});
// ... instead of:
state.counters["Foo"] = numFoos;
state.counters["Bar"] = numBars;
state.counters["Baz"] = numBazs;
```
### Counter reporting
When using the console reporter, by default, user counters are are printed at
the end after the table, the same way as ``bytes_processed`` and
``items_processed``. This is best for cases in which there are few counters,
or where there are only a couple of lines per benchmark. Here's an example of
the default output:
```
------------------------------------------------------------------------------
Benchmark Time CPU Iterations UserCounters...
------------------------------------------------------------------------------
BM_UserCounter/threads:8 2248 ns 10277 ns 68808 Bar=16 Bat=40 Baz=24 Foo=8
BM_UserCounter/threads:1 9797 ns 9788 ns 71523 Bar=2 Bat=5 Baz=3 Foo=1024m
BM_UserCounter/threads:2 4924 ns 9842 ns 71036 Bar=4 Bat=10 Baz=6 Foo=2
BM_UserCounter/threads:4 2589 ns 10284 ns 68012 Bar=8 Bat=20 Baz=12 Foo=4
BM_UserCounter/threads:8 2212 ns 10287 ns 68040 Bar=16 Bat=40 Baz=24 Foo=8
BM_UserCounter/threads:16 1782 ns 10278 ns 68144 Bar=32 Bat=80 Baz=48 Foo=16
BM_UserCounter/threads:32 1291 ns 10296 ns 68256 Bar=64 Bat=160 Baz=96 Foo=32
BM_UserCounter/threads:4 2615 ns 10307 ns 68040 Bar=8 Bat=20 Baz=12 Foo=4
BM_Factorial 26 ns 26 ns 26608979 40320
BM_Factorial/real_time 26 ns 26 ns 26587936 40320
BM_CalculatePiRange/1 16 ns 16 ns 45704255 0
BM_CalculatePiRange/8 73 ns 73 ns 9520927 3.28374
BM_CalculatePiRange/64 609 ns 609 ns 1140647 3.15746
BM_CalculatePiRange/512 4900 ns 4901 ns 142696 3.14355
```
If this doesn't suit you, you can print each counter as a table column by
passing the flag `--benchmark_counters_tabular=true` to the benchmark
application. This is best for cases in which there are a lot of counters, or
a lot of lines per individual benchmark. Note that this will trigger a
reprinting of the table header any time the counter set changes between
individual benchmarks. Here's an example of corresponding output when
`--benchmark_counters_tabular=true` is passed:
```
---------------------------------------------------------------------------------------
Benchmark Time CPU Iterations Bar Bat Baz Foo
---------------------------------------------------------------------------------------
BM_UserCounter/threads:8 2198 ns 9953 ns 70688 16 40 24 8
BM_UserCounter/threads:1 9504 ns 9504 ns 73787 2 5 3 1
BM_UserCounter/threads:2 4775 ns 9550 ns 72606 4 10 6 2
BM_UserCounter/threads:4 2508 ns 9951 ns 70332 8 20 12 4
BM_UserCounter/threads:8 2055 ns 9933 ns 70344 16 40 24 8
BM_UserCounter/threads:16 1610 ns 9946 ns 70720 32 80 48 16
BM_UserCounter/threads:32 1192 ns 9948 ns 70496 64 160 96 32
BM_UserCounter/threads:4 2506 ns 9949 ns 70332 8 20 12 4
--------------------------------------------------------------
Benchmark Time CPU Iterations
--------------------------------------------------------------
BM_Factorial 26 ns 26 ns 26392245 40320
BM_Factorial/real_time 26 ns 26 ns 26494107 40320
BM_CalculatePiRange/1 15 ns 15 ns 45571597 0
BM_CalculatePiRange/8 74 ns 74 ns 9450212 3.28374
BM_CalculatePiRange/64 595 ns 595 ns 1173901 3.15746
BM_CalculatePiRange/512 4752 ns 4752 ns 147380 3.14355
BM_CalculatePiRange/4k 37970 ns 37972 ns 18453 3.14184
BM_CalculatePiRange/32k 303733 ns 303744 ns 2305 3.14162
BM_CalculatePiRange/256k 2434095 ns 2434186 ns 288 3.1416
BM_CalculatePiRange/1024k 9721140 ns 9721413 ns 71 3.14159
BM_CalculatePi/threads:8 2255 ns 9943 ns 70936
```
Note above the additional header printed when the benchmark changes from
``BM_UserCounter`` to ``BM_Factorial``. This is because ``BM_Factorial`` does
not have the same counter set as ``BM_UserCounter``.
## Exiting Benchmarks in Error
When errors caused by external influences, such as file I/O and network
communication, occur within a benchmark the
`State::SkipWithError(const char* msg)` function can be used to skip that run
of benchmark and report the error. Note that only future iterations of the
`KeepRunning()` are skipped. For the ranged-for version of the benchmark loop
Users must explicitly exit the loop, otherwise all iterations will be performed.
Users may explicitly return to exit the benchmark immediately.
The `SkipWithError(...)` function may be used at any point within the benchmark,
including before and after the benchmark loop.
For example:
```c++
static void BM_test(benchmark::State& state) {
auto resource = GetResource();
if (!resource.good()) {
state.SkipWithError("Resource is not good!");
// KeepRunning() loop will not be entered.
}
for (state.KeepRunning()) {
auto data = resource.read_data();
if (!resource.good()) {
state.SkipWithError("Failed to read data!");
break; // Needed to skip the rest of the iteration.
}
do_stuff(data);
}
}
static void BM_test_ranged_fo(benchmark::State & state) {
state.SkipWithError("test will not be entered");
for (auto _ : state) {
state.SkipWithError("Failed!");
break; // REQUIRED to prevent all further iterations.
}
}
```
## Running a subset of the benchmarks
The `--benchmark_filter=<regex>` option can be used to only run the benchmarks
which match the specified `<regex>`. For example:
```bash
$ ./run_benchmarks.x --benchmark_filter=BM_memcpy/32
Run on (1 X 2300 MHz CPU )
2016-06-25 19:34:24
Benchmark Time CPU Iterations
----------------------------------------------------
BM_memcpy/32 11 ns 11 ns 79545455
BM_memcpy/32k 2181 ns 2185 ns 324074
BM_memcpy/32 12 ns 12 ns 54687500
BM_memcpy/32k 1834 ns 1837 ns 357143
```
## Output Formats
The library supports multiple output formats. Use the
`--benchmark_format=<console|json|csv>` flag to set the format type. `console`
is the default format.
The Console format is intended to be a human readable format. By default
the format generates color output. Context is output on stderr and the
tabular data on stdout. Example tabular output looks like:
```
Benchmark Time(ns) CPU(ns) Iterations
----------------------------------------------------------------------
BM_SetInsert/1024/1 28928 29349 23853 133.097kB/s 33.2742k items/s
BM_SetInsert/1024/8 32065 32913 21375 949.487kB/s 237.372k items/s
BM_SetInsert/1024/10 33157 33648 21431 1.13369MB/s 290.225k items/s
```
The JSON format outputs human readable json split into two top level attributes.
The `context` attribute contains information about the run in general, including
information about the CPU and the date.
The `benchmarks` attribute contains a list of every benchmark run. Example json
output looks like:
```json
{
"context": {
"date": "2015/03/17-18:40:25",
"num_cpus": 40,
"mhz_per_cpu": 2801,
"cpu_scaling_enabled": false,
"build_type": "debug"
},
"benchmarks": [
{
"name": "BM_SetInsert/1024/1",
"iterations": 94877,
"real_time": 29275,
"cpu_time": 29836,
"bytes_per_second": 134066,
"items_per_second": 33516
},
{
"name": "BM_SetInsert/1024/8",
"iterations": 21609,
"real_time": 32317,
"cpu_time": 32429,
"bytes_per_second": 986770,
"items_per_second": 246693
},
{
"name": "BM_SetInsert/1024/10",
"iterations": 21393,
"real_time": 32724,
"cpu_time": 33355,
"bytes_per_second": 1199226,
"items_per_second": 299807
}
]
}
```
The CSV format outputs comma-separated values. The `context` is output on stderr
and the CSV itself on stdout. Example CSV output looks like:
```
name,iterations,real_time,cpu_time,bytes_per_second,items_per_second,label
"BM_SetInsert/1024/1",65465,17890.7,8407.45,475768,118942,
"BM_SetInsert/1024/8",116606,18810.1,9766.64,3.27646e+06,819115,
"BM_SetInsert/1024/10",106365,17238.4,8421.53,4.74973e+06,1.18743e+06,
```
## Output Files
The library supports writing the output of the benchmark to a file specified
by `--benchmark_out=<filename>`. The format of the output can be specified
using `--benchmark_out_format={json|console|csv}`. Specifying
`--benchmark_out` does not suppress the console output.
## Debug vs Release
By default, benchmark builds as a debug library. You will see a warning in the output when this is the case. To build it as a release library instead, use:
```
cmake -DCMAKE_BUILD_TYPE=Release
```
To enable link-time optimisation, use
```
cmake -DCMAKE_BUILD_TYPE=Release -DBENCHMARK_ENABLE_LTO=true
```
If you are using gcc, you might need to set `GCC_AR` and `GCC_RANLIB` cmake cache variables, if autodetection fails.
If you are using clang, you may need to set `LLVMAR_EXECUTABLE`, `LLVMNM_EXECUTABLE` and `LLVMRANLIB_EXECUTABLE` cmake cache variables.
## Linking against the library
When the library is built using GCC it is necessary to link with `-pthread`,
due to how GCC implements `std::thread`.
For GCC 4.x failing to link to pthreads will lead to runtime exceptions, not linker errors.
See [issue #67](https://github.com/google/benchmark/issues/67) for more details.
## Compiler Support
Google Benchmark uses C++11 when building the library. As such we require
a modern C++ toolchain, both compiler and standard library.
The following minimum versions are strongly recommended build the library:
* GCC 4.8
* Clang 3.4
* Visual Studio 2013
* Intel 2015 Update 1
Anything older *may* work.
Note: Using the library and its headers in C++03 is supported. C++11 is only
required to build the library.
## Disable CPU frequency scaling
If you see this error:
```
***WARNING*** CPU scaling is enabled, the benchmark real time measurements may be noisy and will incur extra overhead.
```
you might want to disable the CPU frequency scaling while running the benchmark:
```bash
sudo cpupower frequency-set --governor performance
./mybench
sudo cpupower frequency-set --governor powersave
```
# Known Issues
### Windows with CMake
* Users must manually link `shlwapi.lib`. Failure to do so may result
in unresolved symbols.
### Solaris
* Users must explicitly link with kstat library (-lkstat compilation flag).

7
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workspace(name = "com_github_google_benchmark")
http_archive(
name = "com_google_googletest",
urls = ["https://github.com/google/googletest/archive/3f0cf6b62ad1eb50d8736538363d3580dd640c3e.zip"],
strip_prefix = "googletest-3f0cf6b62ad1eb50d8736538363d3580dd640c3e",
)

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@ -0,0 +1,56 @@
version: '{build}'
image: Visual Studio 2017
configuration:
- Debug
- Release
environment:
matrix:
- compiler: msvc-15-seh
generator: "Visual Studio 15 2017"
- compiler: msvc-15-seh
generator: "Visual Studio 15 2017 Win64"
- compiler: msvc-14-seh
generator: "Visual Studio 14 2015"
- compiler: msvc-14-seh
generator: "Visual Studio 14 2015 Win64"
- compiler: msvc-12-seh
generator: "Visual Studio 12 2013"
- compiler: msvc-12-seh
generator: "Visual Studio 12 2013 Win64"
- compiler: gcc-5.3.0-posix
generator: "MinGW Makefiles"
cxx_path: 'C:\mingw-w64\i686-5.3.0-posix-dwarf-rt_v4-rev0\mingw32\bin'
APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
matrix:
fast_finish: true
install:
# git bash conflicts with MinGW makefiles
- if "%generator%"=="MinGW Makefiles" (set "PATH=%PATH:C:\Program Files\Git\usr\bin;=%")
- if not "%cxx_path%"=="" (set "PATH=%PATH%;%cxx_path%")
build_script:
- md _build -Force
- cd _build
- echo %configuration%
- cmake -G "%generator%" "-DCMAKE_BUILD_TYPE=%configuration%" -DBENCHMARK_DOWNLOAD_DEPENDENCIES=ON ..
- cmake --build . --config %configuration%
test_script:
- ctest -c %configuration% --timeout 300 --output-on-failure
artifacts:
- path: '_build/CMakeFiles/*.log'
name: logs
- path: '_build/Testing/**/*.xml'
name: test_results

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# - Adds a compiler flag if it is supported by the compiler
#
# This function checks that the supplied compiler flag is supported and then
# adds it to the corresponding compiler flags
#
# add_cxx_compiler_flag(<FLAG> [<VARIANT>])
#
# - Example
#
# include(AddCXXCompilerFlag)
# add_cxx_compiler_flag(-Wall)
# add_cxx_compiler_flag(-no-strict-aliasing RELEASE)
# Requires CMake 2.6+
if(__add_cxx_compiler_flag)
return()
endif()
set(__add_cxx_compiler_flag INCLUDED)
include(CheckCXXCompilerFlag)
function(mangle_compiler_flag FLAG OUTPUT)
string(TOUPPER "HAVE_CXX_FLAG_${FLAG}" SANITIZED_FLAG)
string(REPLACE "+" "X" SANITIZED_FLAG ${SANITIZED_FLAG})
string(REGEX REPLACE "[^A-Za-z_0-9]" "_" SANITIZED_FLAG ${SANITIZED_FLAG})
string(REGEX REPLACE "_+" "_" SANITIZED_FLAG ${SANITIZED_FLAG})
set(${OUTPUT} "${SANITIZED_FLAG}" PARENT_SCOPE)
endfunction(mangle_compiler_flag)
function(add_cxx_compiler_flag FLAG)
mangle_compiler_flag("${FLAG}" MANGLED_FLAG)
set(OLD_CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS}")
set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} ${FLAG}")
check_cxx_compiler_flag("${FLAG}" ${MANGLED_FLAG})
set(CMAKE_REQUIRED_FLAGS "${OLD_CMAKE_REQUIRED_FLAGS}")
if(${MANGLED_FLAG})
set(VARIANT ${ARGV1})
if(ARGV1)
string(TOUPPER "_${VARIANT}" VARIANT)
endif()
set(CMAKE_CXX_FLAGS${VARIANT} "${CMAKE_CXX_FLAGS${VARIANT}} ${BENCHMARK_CXX_FLAGS${VARIANT}} ${FLAG}" PARENT_SCOPE)
endif()
endfunction()
function(add_required_cxx_compiler_flag FLAG)
mangle_compiler_flag("${FLAG}" MANGLED_FLAG)
set(OLD_CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS}")
set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} ${FLAG}")
check_cxx_compiler_flag("${FLAG}" ${MANGLED_FLAG})
set(CMAKE_REQUIRED_FLAGS "${OLD_CMAKE_REQUIRED_FLAGS}")
if(${MANGLED_FLAG})
set(VARIANT ${ARGV1})
if(ARGV1)
string(TOUPPER "_${VARIANT}" VARIANT)
endif()
set(CMAKE_CXX_FLAGS${VARIANT} "${CMAKE_CXX_FLAGS${VARIANT}} ${FLAG}" PARENT_SCOPE)
set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${FLAG}" PARENT_SCOPE)
set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} ${FLAG}" PARENT_SCOPE)
set(CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS} ${FLAG}" PARENT_SCOPE)
set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} ${FLAG}" PARENT_SCOPE)
else()
message(FATAL_ERROR "Required flag '${FLAG}' is not supported by the compiler")
endif()
endfunction()
function(check_cxx_warning_flag FLAG)
mangle_compiler_flag("${FLAG}" MANGLED_FLAG)
set(OLD_CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS}")
# Add -Werror to ensure the compiler generates an error if the warning flag
# doesn't exist.
set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -Werror ${FLAG}")
check_cxx_compiler_flag("${FLAG}" ${MANGLED_FLAG})
set(CMAKE_REQUIRED_FLAGS "${OLD_CMAKE_REQUIRED_FLAGS}")
endfunction()

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# - Compile and run code to check for C++ features
#
# This functions compiles a source file under the `cmake` folder
# and adds the corresponding `HAVE_[FILENAME]` flag to the CMake
# environment
#
# cxx_feature_check(<FLAG> [<VARIANT>])
#
# - Example
#
# include(CXXFeatureCheck)
# cxx_feature_check(STD_REGEX)
# Requires CMake 2.8.12+
if(__cxx_feature_check)
return()
endif()
set(__cxx_feature_check INCLUDED)
function(cxx_feature_check FILE)
string(TOLOWER ${FILE} FILE)
string(TOUPPER ${FILE} VAR)
string(TOUPPER "HAVE_${VAR}" FEATURE)
if (DEFINED HAVE_${VAR})
set(HAVE_${VAR} 1 PARENT_SCOPE)
add_definitions(-DHAVE_${VAR})
return()
endif()
if (NOT DEFINED COMPILE_${FEATURE})
message("-- Performing Test ${FEATURE}")
if(CMAKE_CROSSCOMPILING)
try_compile(COMPILE_${FEATURE}
${CMAKE_BINARY_DIR} ${CMAKE_CURRENT_SOURCE_DIR}/cmake/${FILE}.cpp
CMAKE_FLAGS ${BENCHMARK_CXX_LINKER_FLAGS}
LINK_LIBRARIES ${BENCHMARK_CXX_LIBRARIES})
if(COMPILE_${FEATURE})
message(WARNING
"If you see build failures due to cross compilation, try setting HAVE_${VAR} to 0")
set(RUN_${FEATURE} 0)
else()
set(RUN_${FEATURE} 1)
endif()
else()
message("-- Performing Test ${FEATURE}")
try_run(RUN_${FEATURE} COMPILE_${FEATURE}
${CMAKE_BINARY_DIR} ${CMAKE_CURRENT_SOURCE_DIR}/cmake/${FILE}.cpp
CMAKE_FLAGS ${BENCHMARK_CXX_LINKER_FLAGS}
LINK_LIBRARIES ${BENCHMARK_CXX_LIBRARIES})
endif()
endif()
if(RUN_${FEATURE} EQUAL 0)
message("-- Performing Test ${FEATURE} -- success")
set(HAVE_${VAR} 1 PARENT_SCOPE)
add_definitions(-DHAVE_${VAR})
else()
if(NOT COMPILE_${FEATURE})
message("-- Performing Test ${FEATURE} -- failed to compile")
else()
message("-- Performing Test ${FEATURE} -- compiled but failed to run")
endif()
endif()
endfunction()

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include("${CMAKE_CURRENT_LIST_DIR}/@targets_export_name@.cmake")

54
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# - Returns a version string from Git tags
#
# This function inspects the annotated git tags for the project and returns a string
# into a CMake variable
#
# get_git_version(<var>)
#
# - Example
#
# include(GetGitVersion)
# get_git_version(GIT_VERSION)
#
# Requires CMake 2.8.11+
find_package(Git)
if(__get_git_version)
return()
endif()
set(__get_git_version INCLUDED)
function(get_git_version var)
if(GIT_EXECUTABLE)
execute_process(COMMAND ${GIT_EXECUTABLE} describe --match "v[0-9]*.[0-9]*.[0-9]*" --abbrev=8
WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
RESULT_VARIABLE status
OUTPUT_VARIABLE GIT_VERSION
ERROR_QUIET)
if(${status})
set(GIT_VERSION "v0.0.0")
else()
string(STRIP ${GIT_VERSION} GIT_VERSION)
string(REGEX REPLACE "-[0-9]+-g" "-" GIT_VERSION ${GIT_VERSION})
endif()
# Work out if the repository is dirty
execute_process(COMMAND ${GIT_EXECUTABLE} update-index -q --refresh
WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
OUTPUT_QUIET
ERROR_QUIET)
execute_process(COMMAND ${GIT_EXECUTABLE} diff-index --name-only HEAD --
WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
OUTPUT_VARIABLE GIT_DIFF_INDEX
ERROR_QUIET)
string(COMPARE NOTEQUAL "${GIT_DIFF_INDEX}" "" GIT_DIRTY)
if (${GIT_DIRTY})
set(GIT_VERSION "${GIT_VERSION}-dirty")
endif()
else()
set(GIT_VERSION "v0.0.0")
endif()
message("-- git Version: ${GIT_VERSION}")
set(${var} ${GIT_VERSION} PARENT_SCOPE)
endfunction()

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include(split_list)
macro(build_external_gtest)
include(ExternalProject)
set(GTEST_FLAGS "")
if (BENCHMARK_USE_LIBCXX)
if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
list(APPEND GTEST_FLAGS -stdlib=libc++)
else()
message(WARNING "Unsupported compiler (${CMAKE_CXX_COMPILER}) when using libc++")
endif()
endif()
if (BENCHMARK_BUILD_32_BITS)
list(APPEND GTEST_FLAGS -m32)
endif()
if (NOT "${CMAKE_CXX_FLAGS}" STREQUAL "")
list(APPEND GTEST_FLAGS ${CMAKE_CXX_FLAGS})
endif()
string(TOUPPER "${CMAKE_BUILD_TYPE}" GTEST_BUILD_TYPE)
if ("${GTEST_BUILD_TYPE}" STREQUAL "COVERAGE")
set(GTEST_BUILD_TYPE "DEBUG")
endif()
# FIXME: Since 10/Feb/2017 the googletest trunk has had a bug where
# -Werror=unused-function fires during the build on OS X. This is a temporary
# workaround to keep our travis bots from failing. It should be removed
# once gtest is fixed.
if (NOT "${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")
list(APPEND GTEST_FLAGS "-Wno-unused-function")
endif()
split_list(GTEST_FLAGS)
set(EXCLUDE_FROM_ALL_OPT "")
set(EXCLUDE_FROM_ALL_VALUE "")
if (${CMAKE_VERSION} VERSION_GREATER "3.0.99")
set(EXCLUDE_FROM_ALL_OPT "EXCLUDE_FROM_ALL")
set(EXCLUDE_FROM_ALL_VALUE "ON")
endif()
ExternalProject_Add(googletest
${EXCLUDE_FROM_ALL_OPT} ${EXCLUDE_FROM_ALL_VALUE}
GIT_REPOSITORY https://github.com/google/googletest.git
GIT_TAG master
PREFIX "${CMAKE_BINARY_DIR}/googletest"
INSTALL_DIR "${CMAKE_BINARY_DIR}/googletest"
CMAKE_CACHE_ARGS
-DCMAKE_BUILD_TYPE:STRING=${GTEST_BUILD_TYPE}
-DCMAKE_C_COMPILER:STRING=${CMAKE_C_COMPILER}
-DCMAKE_CXX_COMPILER:STRING=${CMAKE_CXX_COMPILER}
-DCMAKE_INSTALL_PREFIX:PATH=<INSTALL_DIR>
-DCMAKE_INSTALL_LIBDIR:PATH=<INSTALL_DIR>/lib
-DCMAKE_CXX_FLAGS:STRING=${GTEST_FLAGS}
-Dgtest_force_shared_crt:BOOL=ON
)
ExternalProject_Get_Property(googletest install_dir)
set(GTEST_INCLUDE_DIRS ${install_dir}/include)
file(MAKE_DIRECTORY ${GTEST_INCLUDE_DIRS})
set(LIB_SUFFIX "${CMAKE_STATIC_LIBRARY_SUFFIX}")
set(LIB_PREFIX "${CMAKE_STATIC_LIBRARY_PREFIX}")
if("${GTEST_BUILD_TYPE}" STREQUAL "DEBUG")
set(LIB_SUFFIX "d${CMAKE_STATIC_LIBRARY_SUFFIX}")
endif()
# Use gmock_main instead of gtest_main because it initializes gtest as well.
# Note: The libraries are listed in reverse order of their dependancies.
foreach(LIB gtest gmock gmock_main)
add_library(${LIB} UNKNOWN IMPORTED)
set_target_properties(${LIB} PROPERTIES
IMPORTED_LOCATION ${install_dir}/lib/${LIB_PREFIX}${LIB}${LIB_SUFFIX}
INTERFACE_INCLUDE_DIRECTORIES ${GTEST_INCLUDE_DIRS}
INTERFACE_LINK_LIBRARIES "${GTEST_BOTH_LIBRARIES}"
)
add_dependencies(${LIB} googletest)
list(APPEND GTEST_BOTH_LIBRARIES ${LIB})
endforeach()
endmacro(build_external_gtest)
if (BENCHMARK_ENABLE_GTEST_TESTS)
if (IS_DIRECTORY ${CMAKE_SOURCE_DIR}/googletest)
set(GTEST_ROOT "${CMAKE_SOURCE_DIR}/googletest")
set(INSTALL_GTEST OFF CACHE INTERNAL "")
set(INSTALL_GMOCK OFF CACHE INTERNAL "")
add_subdirectory(${CMAKE_SOURCE_DIR}/googletest)
set(GTEST_BOTH_LIBRARIES gtest gmock gmock_main)
foreach(HEADER test mock)
# CMake 2.8 and older don't respect INTERFACE_INCLUDE_DIRECTORIES, so we
# have to add the paths ourselves.
set(HFILE g${HEADER}/g${HEADER}.h)
set(HPATH ${GTEST_ROOT}/google${HEADER}/include)
find_path(HEADER_PATH_${HEADER} ${HFILE}
NO_DEFAULT_PATHS
HINTS ${HPATH}
)
if (NOT HEADER_PATH_${HEADER})
message(FATAL_ERROR "Failed to find header ${HFILE} in ${HPATH}")
endif()
list(APPEND GTEST_INCLUDE_DIRS ${HEADER_PATH_${HEADER}})
endforeach()
elseif(BENCHMARK_DOWNLOAD_DEPENDENCIES)
build_external_gtest()
else()
find_package(GTest REQUIRED)
find_path(GMOCK_INCLUDE_DIRS gmock/gmock.h
HINTS ${GTEST_INCLUDE_DIRS})
if (NOT GMOCK_INCLUDE_DIRS)
message(FATAL_ERROR "Failed to find header gmock/gmock.h with hint ${GTEST_INCLUDE_DIRS}")
endif()
set(GTEST_INCLUDE_DIRS ${GTEST_INCLUDE_DIRS} ${GMOCK_INCLUDE_DIRS})
# FIXME: We don't currently require the gmock library to build the tests,
# and it's likely we won't find it, so we don't try. As long as we've
# found the gmock/gmock.h header and gtest_main that should be good enough.
endif()
endif()

16
utils/benchmark/cmake/Modules/FindLLVMAr.cmake Normal file
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@ -0,0 +1,16 @@
include(FeatureSummary)
find_program(LLVMAR_EXECUTABLE
NAMES llvm-ar
DOC "The llvm-ar executable"
)
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(LLVMAr
DEFAULT_MSG
LLVMAR_EXECUTABLE)
SET_PACKAGE_PROPERTIES(LLVMAr PROPERTIES
URL https://llvm.org/docs/CommandGuide/llvm-ar.html
DESCRIPTION "create, modify, and extract from archives"
)

16
utils/benchmark/cmake/Modules/FindLLVMNm.cmake Normal file
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@ -0,0 +1,16 @@
include(FeatureSummary)
find_program(LLVMNM_EXECUTABLE
NAMES llvm-nm
DOC "The llvm-nm executable"
)
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(LLVMNm
DEFAULT_MSG
LLVMNM_EXECUTABLE)
SET_PACKAGE_PROPERTIES(LLVMNm PROPERTIES
URL https://llvm.org/docs/CommandGuide/llvm-nm.html
DESCRIPTION "list LLVM bitcode and object file’s symbol table"
)

15
utils/benchmark/cmake/Modules/FindLLVMRanLib.cmake Normal file
View File

@ -0,0 +1,15 @@
include(FeatureSummary)
find_program(LLVMRANLIB_EXECUTABLE
NAMES llvm-ranlib
DOC "The llvm-ranlib executable"
)
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(LLVMRanLib
DEFAULT_MSG
LLVMRANLIB_EXECUTABLE)
SET_PACKAGE_PROPERTIES(LLVMRanLib PROPERTIES
DESCRIPTION "generate index for LLVM archive"
)

11
utils/benchmark/cmake/benchmark.pc.in Normal file
View File

@ -0,0 +1,11 @@
prefix=@CMAKE_INSTALL_PREFIX@
exec_prefix=${prefix}
libdir=${prefix}/lib
includedir=${prefix}/include
Name: @PROJECT_NAME@
Description: Google microbenchmark framework
Version: @VERSION@
Libs: -L${libdir} -lbenchmark
Cflags: -I${includedir}

11
utils/benchmark/cmake/gnu_posix_regex.cpp Normal file
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@ -0,0 +1,11 @@
#include <gnuregex.h>
#include <string>
int main() {
std::string str = "test0159";
regex_t re;
int ec = regcomp(&re, "^[a-z]+[0-9]+$", REG_EXTENDED | REG_NOSUB);
if (ec != 0) {
return ec;
}
return regexec(&re, str.c_str(), 0, nullptr, 0) ? -1 : 0;
}

8
utils/benchmark/cmake/llvm-toolchain.cmake Normal file
View File

@ -0,0 +1,8 @@
find_package(LLVMAr REQUIRED)
set(CMAKE_AR "${LLVMAR_EXECUTABLE}" CACHE FILEPATH "" FORCE)
find_package(LLVMNm REQUIRED)
set(CMAKE_NM "${LLVMNM_EXECUTABLE}" CACHE FILEPATH "" FORCE)
find_package(LLVMRanLib REQUIRED)
set(CMAKE_RANLIB "${LLVMRANLIB_EXECUTABLE}" CACHE FILEPATH "" FORCE)

13
utils/benchmark/cmake/posix_regex.cpp Normal file
View File

@ -0,0 +1,13 @@
#include <regex.h>
#include <string>
int main() {
std::string str = "test0159";
regex_t re;
int ec = regcomp(&re, "^[a-z]+[0-9]+$", REG_EXTENDED | REG_NOSUB);
if (ec != 0) {
return ec;
}
int ret = regexec(&re, str.c_str(), 0, nullptr, 0) ? -1 : 0;
regfree(&re);
return ret;
}

3
utils/benchmark/cmake/split_list.cmake Normal file
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@ -0,0 +1,3 @@
macro(split_list listname)
string(REPLACE ";" " " ${listname} "${${listname}}")
endmacro()

9
utils/benchmark/cmake/std_regex.cpp Normal file
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@ -0,0 +1,9 @@
#include <regex>
#include <string>
int main() {
const std::string str = "test0159";
std::regex re;
re = std::regex("^[a-z]+[0-9]+$",
std::regex_constants::extended | std::regex_constants::nosubs);
return std::regex_search(str, re) ? 0 : -1;
}

7
utils/benchmark/cmake/steady_clock.cpp Normal file
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@ -0,0 +1,7 @@
#include <chrono>
int main() {
typedef std::chrono::steady_clock Clock;
Clock::time_point tp = Clock::now();
((void)tp);
}

4
utils/benchmark/cmake/thread_safety_attributes.cpp Normal file
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@ -0,0 +1,4 @@
#define HAVE_THREAD_SAFETY_ATTRIBUTES
#include "../src/mutex.h"
int main() {}

146
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@ -0,0 +1,146 @@
# Assembly Tests
The Benchmark library provides a number of functions whose primary
purpose in to affect assembly generation, including `DoNotOptimize`
and `ClobberMemory`. In addition there are other functions,
such as `KeepRunning`, for which generating good assembly is paramount.
For these functions it's important to have tests that verify the
correctness and quality of the implementation. This requires testing
the code generated by the compiler.
This document describes how the Benchmark library tests compiler output,
as well as how to properly write new tests.
## Anatomy of a Test
Writing a test has two steps:
* Write the code you want to generate assembly for.
* Add `// CHECK` lines to match against the verified assembly.
Example:
```c++
// CHECK-LABEL: test_add:
extern "C" int test_add() {
extern int ExternInt;
return ExternInt + 1;
// CHECK: movl ExternInt(%rip), %eax
// CHECK: addl %eax
// CHECK: ret
}
```
#### LLVM Filecheck
[LLVM's Filecheck](https://llvm.org/docs/CommandGuide/FileCheck.html)
is used to test the generated assembly against the `// CHECK` lines
specified in the tests source file. Please see the documentation
linked above for information on how to write `CHECK` directives.
#### Tips and Tricks:
* Tests should match the minimal amount of output required to establish
correctness. `CHECK` directives don't have to match on the exact next line
after the previous match, so tests should omit checks for unimportant
bits of assembly. ([`CHECK-NEXT`](https://llvm.org/docs/CommandGuide/FileCheck.html#the-check-next-directive)
can be used to ensure a match occurs exactly after the previous match).
* The tests are compiled with `-O3 -g0`. So we're only testing the
optimized output.
* The assembly output is further cleaned up using `tools/strip_asm.py`.
This removes comments, assembler directives, and unused labels before
the test is run.
* The generated and stripped assembly file for a test is output under
`<build-directory>/test/<test-name>.s`
* Filecheck supports using [`CHECK` prefixes](https://llvm.org/docs/CommandGuide/FileCheck.html#cmdoption-check-prefixes)
to specify lines that should only match in certain situations.
The Benchmark tests use `CHECK-CLANG` and `CHECK-GNU` for lines that
are only expected to match Clang or GCC's output respectively. Normal
`CHECK` lines match against all compilers. (Note: `CHECK-NOT` and
`CHECK-LABEL` are NOT prefixes. They are versions of non-prefixed
`CHECK` lines)
* Use `extern "C"` to disable name mangling for specific functions. This
makes them easier to name in the `CHECK` lines.
## Problems Writing Portable Tests
Writing tests which check the code generated by a compiler are
inherently non-portable. Different compilers and even different compiler
versions may generate entirely different code. The Benchmark tests
must tolerate this.
LLVM Filecheck provides a number of mechanisms to help write
"more portable" tests; including [matching using regular expressions](https://llvm.org/docs/CommandGuide/FileCheck.html#filecheck-pattern-matching-syntax),
allowing the creation of [named variables](https://llvm.org/docs/CommandGuide/FileCheck.html#filecheck-variables)
for later matching, and [checking non-sequential matches](https://llvm.org/docs/CommandGuide/FileCheck.html#the-check-dag-directive).
#### Capturing Variables
For example, say GCC stores a variable in a register but Clang stores
it in memory. To write a test that tolerates both cases we "capture"
the destination of the store, and then use the captured expression
to write the remainder of the test.
```c++
// CHECK-LABEL: test_div_no_op_into_shr:
extern "C" void test_div_no_op_into_shr(int value) {
int divisor = 2;
benchmark::DoNotOptimize(divisor); // hide the value from the optimizer
return value / divisor;
// CHECK: movl $2, [[DEST:.*]]
// CHECK: idivl [[DEST]]
// CHECK: ret
}
```
#### Using Regular Expressions to Match Differing Output
Often tests require testing assembly lines which may subtly differ
between compilers or compiler versions. A common example of this
is matching stack frame addresses. In this case regular expressions
can be used to match the differing bits of output. For example:
```c++
int ExternInt;
struct Point { int x, y, z; };
// CHECK-LABEL: test_store_point:
extern "C" void test_store_point() {
Point p{ExternInt, ExternInt, ExternInt};
benchmark::DoNotOptimize(p);
// CHECK: movl ExternInt(%rip), %eax
// CHECK: movl %eax, -{{[0-9]+}}(%rsp)
// CHECK: movl %eax, -{{[0-9]+}}(%rsp)
// CHECK: movl %eax, -{{[0-9]+}}(%rsp)
// CHECK: ret
}
```
## Current Requirements and Limitations
The tests require Filecheck to be installed along the `PATH` of the
build machine. Otherwise the tests will be disabled.
Additionally, as mentioned in the previous section, codegen tests are
inherently non-portable. Currently the tests are limited to:
* x86_64 targets.
* Compiled with GCC or Clang
Further work could be done, at least on a limited basis, to extend the
tests to other architectures and compilers (using `CHECK` prefixes).
Furthermore, the tests fail for builds which specify additional flags
that modify code generation, including `--coverage` or `-fsanitize=`.

242
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@ -0,0 +1,242 @@
# Benchmark Tools
## compare_bench.py
The `compare_bench.py` utility which can be used to compare the result of benchmarks.
The program is invoked like:
``` bash
$ compare_bench.py <old-benchmark> <new-benchmark> [benchmark options]...
```
Where `<old-benchmark>` and `<new-benchmark>` either specify a benchmark executable file, or a JSON output file. The type of the input file is automatically detected. If a benchmark executable is specified then the benchmark is run to obtain the results. Otherwise the results are simply loaded from the output file.
`[benchmark options]` will be passed to the benchmarks invocations. They can be anything that binary accepts, be it either normal `--benchmark_*` parameters, or some custom parameters your binary takes.
The sample output using the JSON test files under `Inputs/` gives:
``` bash
$ ./compare_bench.py ./gbench/Inputs/test1_run1.json ./gbench/Inputs/test1_run2.json
Comparing ./gbench/Inputs/test1_run1.json to ./gbench/Inputs/test1_run2.json
Benchmark Time CPU Time Old Time New CPU Old CPU New
-------------------------------------------------------------------------------------------------------------
BM_SameTimes +0.0000 +0.0000 10 10 10 10
BM_2xFaster -0.5000 -0.5000 50 25 50 25
BM_2xSlower +1.0000 +1.0000 50 100 50 100
BM_1PercentFaster -0.0100 -0.0100 100 99 100 99
BM_1PercentSlower +0.0100 +0.0100 100 101 100 101
BM_10PercentFaster -0.1000 -0.1000 100 90 100 90
BM_10PercentSlower +0.1000 +0.1000 100 110 100 110
BM_100xSlower +99.0000 +99.0000 100 10000 100 10000
BM_100xFaster -0.9900 -0.9900 10000 100 10000 100
BM_10PercentCPUToTime +0.1000 -0.1000 100 110 100 90
BM_ThirdFaster -0.3333 -0.3334 100 67 100 67
BM_BadTimeUnit -0.9000 +0.2000 0 0 0 1
```
As you can note, the values in `Time` and `CPU` columns are calculated as `(new - old) / |old|`.
When a benchmark executable is run, the raw output from the benchmark is printed in real time to stdout. The sample output using `benchmark/basic_test` for both arguments looks like:
```
./compare_bench.py test/basic_test test/basic_test --benchmark_filter=BM_empty.*
RUNNING: test/basic_test --benchmark_filter=BM_empty.* --benchmark_out=/tmp/tmpN7LF3a
Run on (8 X 4000 MHz CPU s)
2017-11-07 23:28:36
---------------------------------------------------------------------
Benchmark Time CPU Iterations
---------------------------------------------------------------------
BM_empty 4 ns 4 ns 170178757
BM_empty/threads:8 1 ns 7 ns 103868920
BM_empty_stop_start 0 ns 0 ns 1000000000
BM_empty_stop_start/threads:8 0 ns 0 ns 1403031720
RUNNING: /test/basic_test --benchmark_filter=BM_empty.* --benchmark_out=/tmp/tmplvrIp8
Run on (8 X 4000 MHz CPU s)
2017-11-07 23:28:38
---------------------------------------------------------------------
Benchmark Time CPU Iterations
---------------------------------------------------------------------
BM_empty 4 ns 4 ns 169534855
BM_empty/threads:8 1 ns 7 ns 104188776
BM_empty_stop_start 0 ns 0 ns 1000000000
BM_empty_stop_start/threads:8 0 ns 0 ns 1404159424
Comparing ../build/test/basic_test to ../build/test/basic_test
Benchmark Time CPU Time Old Time New CPU Old CPU New
---------------------------------------------------------------------------------------------------------------------
BM_empty -0.0048 -0.0049 4 4 4 4
BM_empty/threads:8 -0.0123 -0.0054 1 1 7 7
BM_empty_stop_start -0.0000 -0.0000 0 0 0 0
BM_empty_stop_start/threads:8 -0.0029 +0.0001 0 0 0 0
```
As you can note, the values in `Time` and `CPU` columns are calculated as `(new - old) / |old|`.
Obviously this example doesn't give any useful output, but it's intended to show the output format when 'compare_bench.py' needs to run benchmarks.
## compare.py
The `compare.py` can be used to compare the result of benchmarks.
There are three modes of operation:
1. Just compare two benchmarks, what `compare_bench.py` did.
The program is invoked like:
``` bash
$ compare.py benchmarks <benchmark_baseline> <benchmark_contender> [benchmark options]...
```
Where `<benchmark_baseline>` and `<benchmark_contender>` either specify a benchmark executable file, or a JSON output file. The type of the input file is automatically detected. If a benchmark executable is specified then the benchmark is run to obtain the results. Otherwise the results are simply loaded from the output file.
`[benchmark options]` will be passed to the benchmarks invocations. They can be anything that binary accepts, be it either normal `--benchmark_*` parameters, or some custom parameters your binary takes.
Example output:
```
$ ./compare.py benchmarks ./a.out ./a.out
RUNNING: ./a.out --benchmark_out=/tmp/tmprBT5nW
Run on (8 X 4000 MHz CPU s)
2017-11-07 21:16:44
------------------------------------------------------
Benchmark Time CPU Iterations
------------------------------------------------------
BM_memcpy/8 36 ns 36 ns 19101577 211.669MB/s
BM_memcpy/64 76 ns 76 ns 9412571 800.199MB/s
BM_memcpy/512 84 ns 84 ns 8249070 5.64771GB/s
BM_memcpy/1024 116 ns 116 ns 6181763 8.19505GB/s
BM_memcpy/8192 643 ns 643 ns 1062855 11.8636GB/s
BM_copy/8 222 ns 222 ns 3137987 34.3772MB/s
BM_copy/64 1608 ns 1608 ns 432758 37.9501MB/s
BM_copy/512 12589 ns 12589 ns 54806 38.7867MB/s
BM_copy/1024 25169 ns 25169 ns 27713 38.8003MB/s
BM_copy/8192 201165 ns 201112 ns 3486 38.8466MB/s
RUNNING: ./a.out --benchmark_out=/tmp/tmpt1wwG_
Run on (8 X 4000 MHz CPU s)
2017-11-07 21:16:53
------------------------------------------------------
Benchmark Time CPU Iterations
------------------------------------------------------
BM_memcpy/8 36 ns 36 ns 19397903 211.255MB/s
BM_memcpy/64 73 ns 73 ns 9691174 839.635MB/s
BM_memcpy/512 85 ns 85 ns 8312329 5.60101GB/s
BM_memcpy/1024 118 ns 118 ns 6438774 8.11608GB/s
BM_memcpy/8192 656 ns 656 ns 1068644 11.6277GB/s
BM_copy/8 223 ns 223 ns 3146977 34.2338MB/s
BM_copy/64 1611 ns 1611 ns 435340 37.8751MB/s
BM_copy/512 12622 ns 12622 ns 54818 38.6844MB/s
BM_copy/1024 25257 ns 25239 ns 27779 38.6927MB/s
BM_copy/8192 205013 ns 205010 ns 3479 38.108MB/s
Comparing ./a.out to ./a.out
Benchmark Time CPU Time Old Time New CPU Old CPU New
------------------------------------------------------------------------------------------------------
BM_memcpy/8 +0.0020 +0.0020 36 36 36 36
BM_memcpy/64 -0.0468 -0.0470 76 73 76 73
BM_memcpy/512 +0.0081 +0.0083 84 85 84 85
BM_memcpy/1024 +0.0098 +0.0097 116 118 116 118
BM_memcpy/8192 +0.0200 +0.0203 643 656 643 656
BM_copy/8 +0.0046 +0.0042 222 223 222 223
BM_copy/64 +0.0020 +0.0020 1608 1611 1608 1611
BM_copy/512 +0.0027 +0.0026 12589 12622 12589 12622
BM_copy/1024 +0.0035 +0.0028 25169 25257 25169 25239
BM_copy/8192 +0.0191 +0.0194 201165 205013 201112 205010
```
What it does is for the every benchmark from the first run it looks for the benchmark with exactly the same name in the second run, and then compares the results. If the names differ, the benchmark is omitted from the diff.
As you can note, the values in `Time` and `CPU` columns are calculated as `(new - old) / |old|`.
2. Compare two different filters of one benchmark
The program is invoked like:
``` bash
$ compare.py filters <benchmark> <filter_baseline> <filter_contender> [benchmark options]...
```
Where `<benchmark>` either specify a benchmark executable file, or a JSON output file. The type of the input file is automatically detected. If a benchmark executable is specified then the benchmark is run to obtain the results. Otherwise the results are simply loaded from the output file.
Where `<filter_baseline>` and `<filter_contender>` are the same regex filters that you would pass to the `[--benchmark_filter=<regex>]` parameter of the benchmark binary.
`[benchmark options]` will be passed to the benchmarks invocations. They can be anything that binary accepts, be it either normal `--benchmark_*` parameters, or some custom parameters your binary takes.
Example output:
```
$ ./compare.py filters ./a.out BM_memcpy BM_copy
RUNNING: ./a.out --benchmark_filter=BM_memcpy --benchmark_out=/tmp/tmpBWKk0k
Run on (8 X 4000 MHz CPU s)
2017-11-07 21:37:28
------------------------------------------------------
Benchmark Time CPU Iterations
------------------------------------------------------
BM_memcpy/8 36 ns 36 ns 17891491 211.215MB/s
BM_memcpy/64 74 ns 74 ns 9400999 825.646MB/s
BM_memcpy/512 87 ns 87 ns 8027453 5.46126GB/s
BM_memcpy/1024 111 ns 111 ns 6116853 8.5648GB/s
BM_memcpy/8192 657 ns 656 ns 1064679 11.6247GB/s
RUNNING: ./a.out --benchmark_filter=BM_copy --benchmark_out=/tmp/tmpAvWcOM
Run on (8 X 4000 MHz CPU s)
2017-11-07 21:37:33
----------------------------------------------------
Benchmark Time CPU Iterations
----------------------------------------------------
BM_copy/8 227 ns 227 ns 3038700 33.6264MB/s
BM_copy/64 1640 ns 1640 ns 426893 37.2154MB/s
BM_copy/512 12804 ns 12801 ns 55417 38.1444MB/s
BM_copy/1024 25409 ns 25407 ns 27516 38.4365MB/s
BM_copy/8192 202986 ns 202990 ns 3454 38.4871MB/s
Comparing BM_memcpy to BM_copy (from ./a.out)
Benchmark Time CPU Time Old Time New CPU Old CPU New
--------------------------------------------------------------------------------------------------------------------
[BM_memcpy vs. BM_copy]/8 +5.2829 +5.2812 36 227 36 227
[BM_memcpy vs. BM_copy]/64 +21.1719 +21.1856 74 1640 74 1640
[BM_memcpy vs. BM_copy]/512 +145.6487 +145.6097 87 12804 87 12801
[BM_memcpy vs. BM_copy]/1024 +227.1860 +227.1776 111 25409 111 25407
[BM_memcpy vs. BM_copy]/8192 +308.1664 +308.2898 657 202986 656 202990
```
As you can see, it applies filter to the benchmarks, both when running the benchmark, and before doing the diff. And to make the diff work, the matches are replaced with some common string. Thus, you can compare two different benchmark families within one benchmark binary.
As you can note, the values in `Time` and `CPU` columns are calculated as `(new - old) / |old|`.
3. Compare filter one from benchmark one to filter two from benchmark two:
The program is invoked like:
``` bash
$ compare.py filters <benchmark_baseline> <filter_baseline> <benchmark_contender> <filter_contender> [benchmark options]...
```
Where `<benchmark_baseline>` and `<benchmark_contender>` either specify a benchmark executable file, or a JSON output file. The type of the input file is automatically detected. If a benchmark executable is specified then the benchmark is run to obtain the results. Otherwise the results are simply loaded from the output file.
Where `<filter_baseline>` and `<filter_contender>` are the same regex filters that you would pass to the `[--benchmark_filter=<regex>]` parameter of the benchmark binary.
`[benchmark options]` will be passed to the benchmarks invocations. They can be anything that binary accepts, be it either normal `--benchmark_*` parameters, or some custom parameters your binary takes.
Example output:
```
$ ./compare.py benchmarksfiltered ./a.out BM_memcpy ./a.out BM_copy
RUNNING: ./a.out --benchmark_filter=BM_memcpy --benchmark_out=/tmp/tmp_FvbYg
Run on (8 X 4000 MHz CPU s)
2017-11-07 21:38:27
------------------------------------------------------
Benchmark Time CPU Iterations
------------------------------------------------------
BM_memcpy/8 37 ns 37 ns 18953482 204.118MB/s
BM_memcpy/64 74 ns 74 ns 9206578 828.245MB/s
BM_memcpy/512 91 ns 91 ns 8086195 5.25476GB/s
BM_memcpy/1024 120 ns 120 ns 5804513 7.95662GB/s
BM_memcpy/8192 664 ns 664 ns 1028363 11.4948GB/s
RUNNING: ./a.out --benchmark_filter=BM_copy --benchmark_out=/tmp/tmpDfL5iE
Run on (8 X 4000 MHz CPU s)
2017-11-07 21:38:32
----------------------------------------------------
Benchmark Time CPU Iterations
----------------------------------------------------
BM_copy/8 230 ns 230 ns 2985909 33.1161MB/s
BM_copy/64 1654 ns 1653 ns 419408 36.9137MB/s
BM_copy/512 13122 ns 13120 ns 53403 37.2156MB/s
BM_copy/1024 26679 ns 26666 ns 26575 36.6218MB/s
BM_copy/8192 215068 ns 215053 ns 3221 36.3283MB/s
Comparing BM_memcpy (from ./a.out) to BM_copy (from ./a.out)
Benchmark Time CPU Time Old Time New CPU Old CPU New
--------------------------------------------------------------------------------------------------------------------
[BM_memcpy vs. BM_copy]/8 +5.1649 +5.1637 37 230 37 230
[BM_memcpy vs. BM_copy]/64 +21.4352 +21.4374 74 1654 74 1653
[BM_memcpy vs. BM_copy]/512 +143.6022 +143.5865 91 13122 91 13120
[BM_memcpy vs. BM_copy]/1024 +221.5903 +221.4790 120 26679 120 26666
[BM_memcpy vs. BM_copy]/8192 +322.9059 +323.0096 664 215068 664 215053
```
This is a mix of the previous two modes, two (potentially different) benchmark binaries are run, and a different filter is applied to each one.
As you can note, the values in `Time` and `CPU` columns are calculated as `(new - old) / |old|`.

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#! /usr/bin/env python
# encoding: utf-8
import argparse
import errno
import logging
import os
import platform
import re
import sys
import subprocess
import tempfile
try:
import winreg
except ImportError:
import _winreg as winreg
try:
import urllib.request as request
except ImportError:
import urllib as request
try:
import urllib.parse as parse
except ImportError:
import urlparse as parse
class EmptyLogger(object):
'''
Provides an implementation that performs no logging
'''
def debug(self, *k, **kw):
pass
def info(self, *k, **kw):
pass
def warn(self, *k, **kw):
pass
def error(self, *k, **kw):
pass
def critical(self, *k, **kw):
pass
def setLevel(self, *k, **kw):
pass
urls = (
'http://downloads.sourceforge.net/project/mingw-w64/Toolchains%20'
'targetting%20Win32/Personal%20Builds/mingw-builds/installer/'
'repository.txt',
'http://downloads.sourceforge.net/project/mingwbuilds/host-windows/'
'repository.txt'
)
'''
A list of mingw-build repositories
'''
def repository(urls = urls, log = EmptyLogger()):
'''
Downloads and parse mingw-build repository files and parses them
'''
log.info('getting mingw-builds repository')
versions = {}
re_sourceforge = re.compile(r'http://sourceforge.net/projects/([^/]+)/files')
re_sub = r'http://downloads.sourceforge.net/project/\1'
for url in urls:
log.debug(' - requesting: %s', url)
socket = request.urlopen(url)
repo = socket.read()
if not isinstance(repo, str):
repo = repo.decode();
socket.close()
for entry in repo.split('\n')[:-1]:
value = entry.split('|')
version = tuple([int(n) for n in value[0].strip().split('.')])
version = versions.setdefault(version, {})
arch = value[1].strip()
if arch == 'x32':
arch = 'i686'
elif arch == 'x64':
arch = 'x86_64'
arch = version.setdefault(arch, {})
threading = arch.setdefault(value[2].strip(), {})
exceptions = threading.setdefault(value[3].strip(), {})
revision = exceptions.setdefault(int(value[4].strip()[3:]),
re_sourceforge.sub(re_sub, value[5].strip()))
return versions
def find_in_path(file, path=None):
'''
Attempts to find an executable in the path
'''
if platform.system() == 'Windows':
file += '.exe'
if path is None:
path = os.environ.get('PATH', '')
if type(path) is type(''):
path = path.split(os.pathsep)
return list(filter(os.path.exists,
map(lambda dir, file=file: os.path.join(dir, file), path)))
def find_7zip(log = EmptyLogger()):
'''
Attempts to find 7zip for unpacking the mingw-build archives
'''
log.info('finding 7zip')
path = find_in_path('7z')
if not path:
key = winreg.OpenKey(winreg.HKEY_LOCAL_MACHINE, r'SOFTWARE\7-Zip')
path, _ = winreg.QueryValueEx(key, 'Path')
path = [os.path.join(path, '7z.exe')]
log.debug('found \'%s\'', path[0])
return path[0]
find_7zip()
def unpack(archive, location, log = EmptyLogger()):
'''
Unpacks a mingw-builds archive
'''
sevenzip = find_7zip(log)
log.info('unpacking %s', os.path.basename(archive))
cmd = [sevenzip, 'x', archive, '-o' + location, '-y']
log.debug(' - %r', cmd)
with open(os.devnull, 'w') as devnull:
subprocess.check_call(cmd, stdout = devnull)
def download(url, location, log = EmptyLogger()):
'''
Downloads and unpacks a mingw-builds archive
'''
log.info('downloading MinGW')
log.debug(' - url: %s', url)
log.debug(' - location: %s', location)
re_content = re.compile(r'attachment;[ \t]*filename=(")?([^"]*)(")?[\r\n]*')
stream = request.urlopen(url)
try:
content = stream.getheader('Content-Disposition') or ''
except AttributeError:
content = stream.headers.getheader('Content-Disposition') or ''
matches = re_content.match(content)
if matches:
filename = matches.group(2)
else:
parsed = parse.urlparse(stream.geturl())
filename = os.path.basename(parsed.path)
try:
os.makedirs(location)
except OSError as e:
if e.errno == errno.EEXIST and os.path.isdir(location):
pass
else:
raise
archive = os.path.join(location, filename)
with open(archive, 'wb') as out:
while True:
buf = stream.read(1024)
if not buf:
break
out.write(buf)
unpack(archive, location, log = log)
os.remove(archive)
possible = os.path.join(location, 'mingw64')
if not os.path.exists(possible):
possible = os.path.join(location, 'mingw32')
if not os.path.exists(possible):
raise ValueError('Failed to find unpacked MinGW: ' + possible)
return possible
def root(location = None, arch = None, version = None, threading = None,
exceptions = None, revision = None, log = EmptyLogger()):
'''
Returns the root folder of a specific version of the mingw-builds variant
of gcc. Will download the compiler if needed
'''
# Get the repository if we don't have all the information
if not (arch and version and threading and exceptions and revision):
versions = repository(log = log)
# Determine some defaults
version = version or max(versions.keys())
if not arch:
arch = platform.machine().lower()
if arch == 'x86':
arch = 'i686'
elif arch == 'amd64':
arch = 'x86_64'
if not threading:
keys = versions[version][arch].keys()
if 'posix' in keys:
threading = 'posix'
elif 'win32' in keys:
threading = 'win32'
else:
threading = keys[0]
if not exceptions:
keys = versions[version][arch][threading].keys()
if 'seh' in keys:
exceptions = 'seh'
elif 'sjlj' in keys:
exceptions = 'sjlj'
else:
exceptions = keys[0]
if revision == None:
revision = max(versions[version][arch][threading][exceptions].keys())
if not location:
location = os.path.join(tempfile.gettempdir(), 'mingw-builds')
# Get the download url
url = versions[version][arch][threading][exceptions][revision]
# Tell the user whatzzup
log.info('finding MinGW %s', '.'.join(str(v) for v in version))
log.debug(' - arch: %s', arch)
log.debug(' - threading: %s', threading)
log.debug(' - exceptions: %s', exceptions)
log.debug(' - revision: %s', revision)
log.debug(' - url: %s', url)
# Store each specific revision differently
slug = '{version}-{arch}-{threading}-{exceptions}-rev{revision}'
slug = slug.format(
version = '.'.join(str(v) for v in version),
arch = arch,
threading = threading,
exceptions = exceptions,
revision = revision
)
if arch == 'x86_64':
root_dir = os.path.join(location, slug, 'mingw64')
elif arch == 'i686':
root_dir = os.path.join(location, slug, 'mingw32')
else:
raise ValueError('Unknown MinGW arch: ' + arch)
# Download if needed
if not os.path.exists(root_dir):
downloaded = download(url, os.path.join(location, slug), log = log)
if downloaded != root_dir:
raise ValueError('The location of mingw did not match\n%s\n%s'
% (downloaded, root_dir))
return root_dir
def str2ver(string):
'''
Converts a version string into a tuple
'''
try:
version = tuple(int(v) for v in string.split('.'))
if len(version) is not 3:
raise ValueError()
except ValueError:
raise argparse.ArgumentTypeError(
'please provide a three digit version string')
return version
def main():
'''
Invoked when the script is run directly by the python interpreter
'''
parser = argparse.ArgumentParser(
description = 'Downloads a specific version of MinGW',
formatter_class = argparse.ArgumentDefaultsHelpFormatter
)
parser.add_argument('--location',
help = 'the location to download the compiler to',
default = os.path.join(tempfile.gettempdir(), 'mingw-builds'))
parser.add_argument('--arch', required = True, choices = ['i686', 'x86_64'],
help = 'the target MinGW architecture string')
parser.add_argument('--version', type = str2ver,
help = 'the version of GCC to download')
parser.add_argument('--threading', choices = ['posix', 'win32'],
help = 'the threading type of the compiler')
parser.add_argument('--exceptions', choices = ['sjlj', 'seh', 'dwarf'],
help = 'the method to throw exceptions')
parser.add_argument('--revision', type=int,
help = 'the revision of the MinGW release')
group = parser.add_mutually_exclusive_group()
group.add_argument('-v', '--verbose', action='store_true',
help='increase the script output verbosity')
group.add_argument('-q', '--quiet', action='store_true',
help='only print errors and warning')
args = parser.parse_args()
# Create the logger
logger = logging.getLogger('mingw')
handler = logging.StreamHandler()
formatter = logging.Formatter('%(message)s')
handler.setFormatter(formatter)
logger.addHandler(handler)
logger.setLevel(logging.INFO)
if args.quiet:
logger.setLevel(logging.WARN)
if args.verbose:
logger.setLevel(logging.DEBUG)
# Get MinGW
root_dir = root(location = args.location, arch = args.arch,
version = args.version, threading = args.threading,
exceptions = args.exceptions, revision = args.revision,
log = logger)
sys.stdout.write('%s\n' % os.path.join(root_dir, 'bin'))
if __name__ == '__main__':
try:
main()
except IOError as e:
sys.stderr.write('IO error: %s\n' % e)
sys.exit(1)
except OSError as e:
sys.stderr.write('OS error: %s\n' % e)
sys.exit(1)
except KeyboardInterrupt as e:
sys.stderr.write('Killed\n')
sys.exit(1)

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# How to release
* Make sure you're on master and synced to HEAD
* Ensure the project builds and tests run (sanity check only, obviously)
* `parallel -j0 exec ::: test/*_test` can help ensure everything at least
passes
* Prepare release notes
* `git log $(git describe --abbrev=0 --tags)..HEAD` gives you the list of
commits between the last annotated tag and HEAD
* Pick the most interesting.
* Create a release through github's interface
* Note this will create a lightweight tag.
* Update this to an annotated tag:
* `git pull --tags`
* `git tag -a -f <tag> <tag>`
* `git push --force origin`

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# Allow the source files to find headers in src/
include_directories(${PROJECT_SOURCE_DIR}/src)
if (DEFINED BENCHMARK_CXX_LINKER_FLAGS)
list(APPEND CMAKE_SHARED_LINKER_FLAGS ${BENCHMARK_CXX_LINKER_FLAGS})
list(APPEND CMAKE_MODULE_LINKER_FLAGS ${BENCHMARK_CXX_LINKER_FLAGS})
endif()
file(GLOB
SOURCE_FILES
*.cc
${PROJECT_SOURCE_DIR}/include/benchmark/*.h
${CMAKE_CURRENT_SOURCE_DIR}/*.h)
list(FILTER SOURCE_FILES EXCLUDE REGEX "benchmark_main\\.cc")
add_library(benchmark ${SOURCE_FILES})
set_target_properties(benchmark PROPERTIES
OUTPUT_NAME "benchmark"
VERSION ${GENERIC_LIB_VERSION}
SOVERSION ${GENERIC_LIB_SOVERSION}
)
target_include_directories(benchmark PUBLIC
$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/../include>
)
# Link threads.
target_link_libraries(benchmark ${BENCHMARK_CXX_LIBRARIES} ${CMAKE_THREAD_LIBS_INIT})
find_library(LIBRT rt)
if(LIBRT)
target_link_libraries(benchmark ${LIBRT})
endif()
# We need extra libraries on Windows
if(${CMAKE_SYSTEM_NAME} MATCHES "Windows")
target_link_libraries(benchmark Shlwapi)
endif()
# We need extra libraries on Solaris
if(${CMAKE_SYSTEM_NAME} MATCHES "SunOS")
target_link_libraries(benchmark kstat)
endif()
# Benchmark main library
add_library(benchmark_main "benchmark_main.cc")
set_target_properties(benchmark_main PROPERTIES
OUTPUT_NAME "benchmark_main"
VERSION ${GENERIC_LIB_VERSION}
SOVERSION ${GENERIC_LIB_SOVERSION}
)
target_include_directories(benchmark PUBLIC
$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/../include>
)
target_link_libraries(benchmark_main benchmark)
set(include_install_dir "include")
set(lib_install_dir "lib/")
set(bin_install_dir "bin/")
set(config_install_dir "lib/cmake/${PROJECT_NAME}")
set(pkgconfig_install_dir "lib/pkgconfig")
set(generated_dir "${CMAKE_CURRENT_BINARY_DIR}/generated")
set(version_config "${generated_dir}/${PROJECT_NAME}ConfigVersion.cmake")
set(project_config "${generated_dir}/${PROJECT_NAME}Config.cmake")
set(pkg_config "${generated_dir}/${PROJECT_NAME}.pc")
set(targets_export_name "${PROJECT_NAME}Targets")
set(namespace "${PROJECT_NAME}::")
include(CMakePackageConfigHelpers)
write_basic_package_version_file(
"${version_config}" VERSION ${GIT_VERSION} COMPATIBILITY SameMajorVersion
)
configure_file("${PROJECT_SOURCE_DIR}/cmake/Config.cmake.in" "${project_config}" @ONLY)
configure_file("${PROJECT_SOURCE_DIR}/cmake/benchmark.pc.in" "${pkg_config}" @ONLY)
if (BENCHMARK_ENABLE_INSTALL)
# Install target (will install the library to specified CMAKE_INSTALL_PREFIX variable)
install(
TARGETS benchmark benchmark_main
EXPORT ${targets_export_name}
ARCHIVE DESTINATION ${lib_install_dir}
LIBRARY DESTINATION ${lib_install_dir}
RUNTIME DESTINATION ${bin_install_dir}
INCLUDES DESTINATION ${include_install_dir})
install(
DIRECTORY "${PROJECT_SOURCE_DIR}/include/benchmark"
DESTINATION ${include_install_dir}
FILES_MATCHING PATTERN "*.*h")
install(
FILES "${project_config}" "${version_config}"
DESTINATION "${config_install_dir}")
install(
FILES "${pkg_config}"
DESTINATION "${pkgconfig_install_dir}")
install(
EXPORT "${targets_export_name}"
NAMESPACE "${namespace}"
DESTINATION "${config_install_dir}")
endif()

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#ifndef BENCHMARK_ARRAYSIZE_H_
#define BENCHMARK_ARRAYSIZE_H_
#include "internal_macros.h"
namespace benchmark {
namespace internal {
// The arraysize(arr) macro returns the # of elements in an array arr.
// The expression is a compile-time constant, and therefore can be
// used in defining new arrays, for example. If you use arraysize on
// a pointer by mistake, you will get a compile-time error.
//
// This template function declaration is used in defining arraysize.
// Note that the function doesn't need an implementation, as we only
// use its type.
template <typename T, size_t N>
char (&ArraySizeHelper(T (&array)[N]))[N];
// That gcc wants both of these prototypes seems mysterious. VC, for
// its part, can't decide which to use (another mystery). Matching of
// template overloads: the final frontier.
#ifndef COMPILER_MSVC
template <typename T, size_t N>
char (&ArraySizeHelper(const T (&array)[N]))[N];
#endif
#define arraysize(array) (sizeof(::benchmark::internal::ArraySizeHelper(array)))
} // end namespace internal
} // end namespace benchmark
#endif // BENCHMARK_ARRAYSIZE_H_

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// Copyright 2015 Google Inc. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "benchmark/benchmark.h"
#include "benchmark_api_internal.h"
#include "internal_macros.h"
#ifndef BENCHMARK_OS_WINDOWS
#ifndef BENCHMARK_OS_FUCHSIA
#include <sys/resource.h>
#endif
#include <sys/time.h>
#include <unistd.h>
#endif
#include <algorithm>
#include <atomic>
#include <condition_variable>
#include <cstdio>
#include <cstdlib>
#include <fstream>
#include <iostream>
#include <memory>
#include <string>
#include <thread>
#include "check.h"
#include "colorprint.h"
#include "commandlineflags.h"
#include "complexity.h"
#include "counter.h"
#include "internal_macros.h"
#include "log.h"
#include "mutex.h"
#include "re.h"
#include "statistics.h"
#include "string_util.h"
#include "thread_manager.h"
#include "thread_timer.h"
DEFINE_bool(benchmark_list_tests, false,
"Print a list of benchmarks. This option overrides all other "
"options.");
DEFINE_string(benchmark_filter, ".",
"A regular expression that specifies the set of benchmarks "
"to execute. If this flag is empty, no benchmarks are run. "
"If this flag is the string \"all\", all benchmarks linked "
"into the process are run.");
DEFINE_double(benchmark_min_time, 0.5,
"Minimum number of seconds we should run benchmark before "
"results are considered significant. For cpu-time based "
"tests, this is the lower bound on the total cpu time "
"used by all threads that make up the test. For real-time "
"based tests, this is the lower bound on the elapsed time "
"of the benchmark execution, regardless of number of "
"threads.");
DEFINE_int32(benchmark_repetitions, 1,
"The number of runs of each benchmark. If greater than 1, the "
"mean and standard deviation of the runs will be reported.");
DEFINE_bool(benchmark_report_aggregates_only, false,
"Report the result of each benchmark repetitions. When 'true' is "
"specified only the mean, standard deviation, and other statistics "
"are reported for repeated benchmarks.");
DEFINE_string(benchmark_format, "console",
"The format to use for console output. Valid values are "
"'console', 'json', or 'csv'.");
DEFINE_string(benchmark_out_format, "json",
"The format to use for file output. Valid values are "
"'console', 'json', or 'csv'.");
DEFINE_string(benchmark_out, "", "The file to write additional output to");
DEFINE_string(benchmark_color, "auto",
"Whether to use colors in the output. Valid values: "
"'true'/'yes'/1, 'false'/'no'/0, and 'auto'. 'auto' means to use "
"colors if the output is being sent to a terminal and the TERM "
"environment variable is set to a terminal type that supports "
"colors.");
DEFINE_bool(benchmark_counters_tabular, false,
"Whether to use tabular format when printing user counters to "
"the console. Valid values: 'true'/'yes'/1, 'false'/'no'/0."
"Defaults to false.");
DEFINE_int32(v, 0, "The level of verbose logging to output");
namespace benchmark {
namespace {
static const size_t kMaxIterations = 1000000000;
} // end namespace
namespace internal {
void UseCharPointer(char const volatile*) {}
namespace {
BenchmarkReporter::Run CreateRunReport(
const benchmark::internal::Benchmark::Instance& b,
const internal::ThreadManager::Result& results,
double seconds) {
// Create report about this benchmark run.
BenchmarkReporter::Run report;
report.benchmark_name = b.name;
report.error_occurred = results.has_error_;
report.error_message = results.error_message_;
report.report_label = results.report_label_;
// This is the total iterations across all threads.
report.iterations = results.iterations;
report.time_unit = b.time_unit;
if (!report.error_occurred) {
double bytes_per_second = 0;
if (results.bytes_processed > 0 && seconds > 0.0) {
bytes_per_second = (results.bytes_processed / seconds);
}
double items_per_second = 0;
if (results.items_processed > 0 && seconds > 0.0) {
items_per_second = (results.items_processed / seconds);
}
if (b.use_manual_time) {
report.real_accumulated_time = results.manual_time_used;
} else {
report.real_accumulated_time = results.real_time_used;
}
report.cpu_accumulated_time = results.cpu_time_used;
report.bytes_per_second = bytes_per_second;
report.items_per_second = items_per_second;
report.complexity_n = results.complexity_n;
report.complexity = b.complexity;
report.complexity_lambda = b.complexity_lambda;
report.statistics = b.statistics;
report.counters = results.counters;
internal::Finish(&report.counters, seconds, b.threads);
}
return report;
}
// Execute one thread of benchmark b for the specified number of iterations.
// Adds the stats collected for the thread into *total.
void RunInThread(const benchmark::internal::Benchmark::Instance* b,
size_t iters, int thread_id,
internal::ThreadManager* manager) {
internal::ThreadTimer timer;
State st(iters, b->arg, thread_id, b->threads, &timer, manager);
b->benchmark->Run(st);
CHECK(st.iterations() >= st.max_iterations)
<< "Benchmark returned before State::KeepRunning() returned false!";
{
MutexLock l(manager->GetBenchmarkMutex());
internal::ThreadManager::Result& results = manager->results;
results.iterations += st.iterations();
results.cpu_time_used += timer.cpu_time_used();
results.real_time_used += timer.real_time_used();
results.manual_time_used += timer.manual_time_used();
results.bytes_processed += st.bytes_processed();
results.items_processed += st.items_processed();
results.complexity_n += st.complexity_length_n();
internal::Increment(&results.counters, st.counters);
}
manager->NotifyThreadComplete();
}
std::vector<BenchmarkReporter::Run> RunBenchmark(
const benchmark::internal::Benchmark::Instance& b,
std::vector<BenchmarkReporter::Run>* complexity_reports) {
std::vector<BenchmarkReporter::Run> reports; // return value
const bool has_explicit_iteration_count = b.iterations != 0;
size_t iters = has_explicit_iteration_count ? b.iterations : 1;
std::unique_ptr<internal::ThreadManager> manager;
std::vector<std::thread> pool(b.threads - 1);
const int repeats =
b.repetitions != 0 ? b.repetitions : FLAGS_benchmark_repetitions;
const bool report_aggregates_only =
repeats != 1 &&
(b.report_mode == internal::RM_Unspecified
? FLAGS_benchmark_report_aggregates_only
: b.report_mode == internal::RM_ReportAggregatesOnly);
for (int repetition_num = 0; repetition_num < repeats; repetition_num++) {
for (;;) {
// Try benchmark
VLOG(2) << "Running " << b.name << " for " << iters << "\n";
manager.reset(new internal::ThreadManager(b.threads));
for (std::size_t ti = 0; ti < pool.size(); ++ti) {
pool[ti] = std::thread(&RunInThread, &b, iters,
static_cast<int>(ti + 1), manager.get());
}
RunInThread(&b, iters, 0, manager.get());
manager->WaitForAllThreads();
for (std::thread& thread : pool) thread.join();
internal::ThreadManager::Result results;
{
MutexLock l(manager->GetBenchmarkMutex());
results = manager->results;
}
manager.reset();
// Adjust real/manual time stats since they were reported per thread.
results.real_time_used /= b.threads;
results.manual_time_used /= b.threads;
VLOG(2) << "Ran in " << results.cpu_time_used << "/"
<< results.real_time_used << "\n";
// Base decisions off of real time if requested by this benchmark.
double seconds = results.cpu_time_used;
if (b.use_manual_time) {
seconds = results.manual_time_used;
} else if (b.use_real_time) {
seconds = results.real_time_used;
}
const double min_time =
!IsZero(b.min_time) ? b.min_time : FLAGS_benchmark_min_time;
// Determine if this run should be reported; Either it has
// run for a sufficient amount of time or because an error was reported.
const bool should_report = repetition_num > 0
|| has_explicit_iteration_count // An exact iteration count was requested
|| results.has_error_
|| iters >= kMaxIterations // No chance to try again, we hit the limit.
|| seconds >= min_time // the elapsed time is large enough
// CPU time is specified but the elapsed real time greatly exceeds the
// minimum time. Note that user provided timers are except from this
// sanity check.
|| ((results.real_time_used >= 5 * min_time) && !b.use_manual_time);
if (should_report) {
BenchmarkReporter::Run report = CreateRunReport(b, results, seconds);
if (!report.error_occurred && b.complexity != oNone)
complexity_reports->push_back(report);
reports.push_back(report);
break;
}
// See how much iterations should be increased by
// Note: Avoid division by zero with max(seconds, 1ns).
double multiplier = min_time * 1.4 / std::max(seconds, 1e-9);
// If our last run was at least 10% of FLAGS_benchmark_min_time then we
// use the multiplier directly. Otherwise we use at most 10 times
// expansion.
// NOTE: When the last run was at least 10% of the min time the max
// expansion should be 14x.
bool is_significant = (seconds / min_time) > 0.1;
multiplier = is_significant ? multiplier : std::min(10.0, multiplier);
if (multiplier <= 1.0) multiplier = 2.0;
double next_iters = std::max(multiplier * iters, iters + 1.0);
if (next_iters > kMaxIterations) {
next_iters = kMaxIterations;
}
VLOG(3) << "Next iters: " << next_iters << ", " << multiplier << "\n";
iters = static_cast<int>(next_iters + 0.5);
}
}
// Calculate additional statistics
auto stat_reports = ComputeStats(reports);
if ((b.complexity != oNone) && b.last_benchmark_instance) {
auto additional_run_stats = ComputeBigO(*complexity_reports);
stat_reports.insert(stat_reports.end(), additional_run_stats.begin(),
additional_run_stats.end());
complexity_reports->clear();
}
if (report_aggregates_only) reports.clear();
reports.insert(reports.end(), stat_reports.begin(), stat_reports.end());
return reports;
}
} // namespace
} // namespace internal
State::State(size_t max_iters, const std::vector<int64_t>& ranges, int thread_i,
int n_threads, internal::ThreadTimer* timer,
internal::ThreadManager* manager)
: total_iterations_(0),
batch_leftover_(0),
max_iterations(max_iters),
started_(false),
finished_(false),
error_occurred_(false),
range_(ranges),
bytes_processed_(0),
items_processed_(0),
complexity_n_(0),
counters(),
thread_index(thread_i),
threads(n_threads),
timer_(timer),
manager_(manager) {
CHECK(max_iterations != 0) << "At least one iteration must be run";
CHECK_LT(thread_index, threads) << "thread_index must be less than threads";
// Note: The use of offsetof below is technically undefined until C++17
// because State is not a standard layout type. However, all compilers
// currently provide well-defined behavior as an extension (which is
// demonstrated since constexpr evaluation must diagnose all undefined
// behavior). However, GCC and Clang also warn about this use of offsetof,
// which must be suppressed.
#ifdef __GNUC__
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Winvalid-offsetof"
#endif
// Offset tests to ensure commonly accessed data is on the first cache line.
const int cache_line_size = 64;
static_assert(offsetof(State, error_occurred_) <=
(cache_line_size - sizeof(error_occurred_)), "");
#ifdef __GNUC__
#pragma GCC diagnostic pop
#endif
}
void State::PauseTiming() {
// Add in time accumulated so far
CHECK(started_ && !finished_ && !error_occurred_);
timer_->StopTimer();
}
void State::ResumeTiming() {
CHECK(started_ && !finished_ && !error_occurred_);
timer_->StartTimer();
}
void State::SkipWithError(const char* msg) {
CHECK(msg);
error_occurred_ = true;
{
MutexLock l(manager_->GetBenchmarkMutex());
if (manager_->results.has_error_ == false) {
manager_->results.error_message_ = msg;
manager_->results.has_error_ = true;
}
}
total_iterations_ = 0;
if (timer_->running()) timer_->StopTimer();
}
void State::SetIterationTime(double seconds) {
timer_->SetIterationTime(seconds);
}
void State::SetLabel(const char* label) {
MutexLock l(manager_->GetBenchmarkMutex());
manager_->results.report_label_ = label;
}
void State::StartKeepRunning() {
CHECK(!started_ && !finished_);
started_ = true;
total_iterations_ = error_occurred_ ? 0 : max_iterations;
manager_->StartStopBarrier();
if (!error_occurred_) ResumeTiming();
}
void State::FinishKeepRunning() {
CHECK(started_ && (!finished_ || error_occurred_));
if (!error_occurred_) {
PauseTiming();
}
// Total iterations has now wrapped around past 0. Fix this.
total_iterations_ = 0;
finished_ = true;
manager_->StartStopBarrier();
}
namespace internal {
namespace {
void RunBenchmarks(const std::vector<Benchmark::Instance>& benchmarks,
BenchmarkReporter* console_reporter,
BenchmarkReporter* file_reporter) {
// Note the file_reporter can be null.
CHECK(console_reporter != nullptr);
// Determine the width of the name field using a minimum width of 10.
bool has_repetitions = FLAGS_benchmark_repetitions > 1;
size_t name_field_width = 10;
size_t stat_field_width = 0;
for (const Benchmark::Instance& benchmark : benchmarks) {
name_field_width =
std::max<size_t>(name_field_width, benchmark.name.size());
has_repetitions |= benchmark.repetitions > 1;
for(const auto& Stat : *benchmark.statistics)
stat_field_width = std::max<size_t>(stat_field_width, Stat.name_.size());
}
if (has_repetitions) name_field_width += 1 + stat_field_width;
// Print header here
BenchmarkReporter::Context context;
context.name_field_width = name_field_width;
// Keep track of running times of all instances of current benchmark
std::vector<BenchmarkReporter::Run> complexity_reports;
// We flush streams after invoking reporter methods that write to them. This
// ensures users get timely updates even when streams are not line-buffered.
auto flushStreams = [](BenchmarkReporter* reporter) {
if (!reporter) return;
std::flush(reporter->GetOutputStream());
std::flush(reporter->GetErrorStream());
};
if (console_reporter->ReportContext(context) &&
(!file_reporter || file_reporter->ReportContext(context))) {
flushStreams(console_reporter);
flushStreams(file_reporter);
for (const auto& benchmark : benchmarks) {
std::vector<BenchmarkReporter::Run> reports =
RunBenchmark(benchmark, &complexity_reports);
console_reporter->ReportRuns(reports);
if (file_reporter) file_reporter->ReportRuns(reports);
flushStreams(console_reporter);
flushStreams(file_reporter);
}
}
console_reporter->Finalize();
if (file_reporter) file_reporter->Finalize();
flushStreams(console_reporter);
flushStreams(file_reporter);
}
std::unique_ptr<BenchmarkReporter> CreateReporter(
std::string const& name, ConsoleReporter::OutputOptions output_opts) {
typedef std::unique_ptr<BenchmarkReporter> PtrType;
if (name == "console") {
return PtrType(new ConsoleReporter(output_opts));
} else if (name == "json") {
return PtrType(new JSONReporter);
} else if (name == "csv") {
return PtrType(new CSVReporter);
} else {
std::cerr << "Unexpected format: '" << name << "'\n";
std::exit(1);
}
}
} // end namespace
bool IsZero(double n) {
return std::abs(n) < std::numeric_limits<double>::epsilon();
}
ConsoleReporter::OutputOptions GetOutputOptions(bool force_no_color) {
int output_opts = ConsoleReporter::OO_Defaults;
if ((FLAGS_benchmark_color == "auto" && IsColorTerminal()) ||
IsTruthyFlagValue(FLAGS_benchmark_color)) {
output_opts |= ConsoleReporter::OO_Color;
} else {
output_opts &= ~ConsoleReporter::OO_Color;
}
if(force_no_color) {
output_opts &= ~ConsoleReporter::OO_Color;
}
if(FLAGS_benchmark_counters_tabular) {
output_opts |= ConsoleReporter::OO_Tabular;
} else {
output_opts &= ~ConsoleReporter::OO_Tabular;
}
return static_cast< ConsoleReporter::OutputOptions >(output_opts);
}
} // end namespace internal
size_t RunSpecifiedBenchmarks() {
return RunSpecifiedBenchmarks(nullptr, nullptr);
}
size_t RunSpecifiedBenchmarks(BenchmarkReporter* console_reporter) {
return RunSpecifiedBenchmarks(console_reporter, nullptr);
}
size_t RunSpecifiedBenchmarks(BenchmarkReporter* console_reporter,
BenchmarkReporter* file_reporter) {
std::string spec = FLAGS_benchmark_filter;
if (spec.empty() || spec == "all")
spec = "."; // Regexp that matches all benchmarks
// Setup the reporters
std::ofstream output_file;
std::unique_ptr<BenchmarkReporter> default_console_reporter;
std::unique_ptr<BenchmarkReporter> default_file_reporter;
if (!console_reporter) {
default_console_reporter = internal::CreateReporter(
FLAGS_benchmark_format, internal::GetOutputOptions());
console_reporter = default_console_reporter.get();
}
auto& Out = console_reporter->GetOutputStream();
auto& Err = console_reporter->GetErrorStream();
std::string const& fname = FLAGS_benchmark_out;
if (fname.empty() && file_reporter) {
Err << "A custom file reporter was provided but "
"--benchmark_out=<file> was not specified."
<< std::endl;
std::exit(1);
}
if (!fname.empty()) {
output_file.open(fname);
if (!output_file.is_open()) {
Err << "invalid file name: '" << fname << std::endl;
std::exit(1);
}
if (!file_reporter) {
default_file_reporter = internal::CreateReporter(
FLAGS_benchmark_out_format, ConsoleReporter::OO_None);
file_reporter = default_file_reporter.get();
}
file_reporter->SetOutputStream(&output_file);
file_reporter->SetErrorStream(&output_file);
}
std::vector<internal::Benchmark::Instance> benchmarks;
if (!FindBenchmarksInternal(spec, &benchmarks, &Err)) return 0;
if (benchmarks.empty()) {
Err << "Failed to match any benchmarks against regex: " << spec << "\n";
return 0;
}
if (FLAGS_benchmark_list_tests) {
for (auto const& benchmark : benchmarks) Out << benchmark.name << "\n";
} else {
internal::RunBenchmarks(benchmarks, console_reporter, file_reporter);
}
return benchmarks.size();
}
namespace internal {
void PrintUsageAndExit() {
fprintf(stdout,
"benchmark"
" [--benchmark_list_tests={true|false}]\n"
" [--benchmark_filter=<regex>]\n"
" [--benchmark_min_time=<min_time>]\n"
" [--benchmark_repetitions=<num_repetitions>]\n"
" [--benchmark_report_aggregates_only={true|false}\n"
" [--benchmark_format=<console|json|csv>]\n"
" [--benchmark_out=<filename>]\n"
" [--benchmark_out_format=<json|console|csv>]\n"
" [--benchmark_color={auto|true|false}]\n"
" [--benchmark_counters_tabular={true|false}]\n"
" [--v=<verbosity>]\n");
exit(0);
}
void ParseCommandLineFlags(int* argc, char** argv) {
using namespace benchmark;
BenchmarkReporter::Context::executable_name = argv[0];
for (int i = 1; i < *argc; ++i) {
if (ParseBoolFlag(argv[i], "benchmark_list_tests",
&FLAGS_benchmark_list_tests) ||
ParseStringFlag(argv[i], "benchmark_filter", &FLAGS_benchmark_filter) ||
ParseDoubleFlag(argv[i], "benchmark_min_time",
&FLAGS_benchmark_min_time) ||
ParseInt32Flag(argv[i], "benchmark_repetitions",
&FLAGS_benchmark_repetitions) ||
ParseBoolFlag(argv[i], "benchmark_report_aggregates_only",
&FLAGS_benchmark_report_aggregates_only) ||
ParseStringFlag(argv[i], "benchmark_format", &FLAGS_benchmark_format) ||
ParseStringFlag(argv[i], "benchmark_out", &FLAGS_benchmark_out) ||
ParseStringFlag(argv[i], "benchmark_out_format",
&FLAGS_benchmark_out_format) ||
ParseStringFlag(argv[i], "benchmark_color", &FLAGS_benchmark_color) ||
// "color_print" is the deprecated name for "benchmark_color".
// TODO: Remove this.
ParseStringFlag(argv[i], "color_print", &FLAGS_benchmark_color) ||
ParseBoolFlag(argv[i], "benchmark_counters_tabular",
&FLAGS_benchmark_counters_tabular) ||
ParseInt32Flag(argv[i], "v", &FLAGS_v)) {
for (int j = i; j != *argc - 1; ++j) argv[j] = argv[j + 1];
--(*argc);
--i;
} else if (IsFlag(argv[i], "help")) {
PrintUsageAndExit();
}
}
for (auto const* flag :
{&FLAGS_benchmark_format, &FLAGS_benchmark_out_format})
if (*flag != "console" && *flag != "json" && *flag != "csv") {
PrintUsageAndExit();
}
if (FLAGS_benchmark_color.empty()) {
PrintUsageAndExit();
}
}
int InitializeStreams() {
static std::ios_base::Init init;
return 0;
}
} // end namespace internal
void Initialize(int* argc, char** argv) {
internal::ParseCommandLineFlags(argc, argv);
internal::LogLevel() = FLAGS_v;
}
bool ReportUnrecognizedArguments(int argc, char** argv) {
for (int i = 1; i < argc; ++i) {
fprintf(stderr, "%s: error: unrecognized command-line flag: %s\n", argv[0], argv[i]);
}
return argc > 1;
}
} // end namespace benchmark

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#ifndef BENCHMARK_API_INTERNAL_H
#define BENCHMARK_API_INTERNAL_H
#include "benchmark/benchmark.h"
#include <cmath>
#include <iosfwd>
#include <limits>
#include <string>
#include <vector>
namespace benchmark {
namespace internal {
// Information kept per benchmark we may want to run
struct Benchmark::Instance {
std::string name;
Benchmark* benchmark;
ReportMode report_mode;
std::vector<int64_t> arg;
TimeUnit time_unit;
int range_multiplier;
bool use_real_time;
bool use_manual_time;
BigO complexity;
BigOFunc* complexity_lambda;
UserCounters counters;
const std::vector<Statistics>* statistics;
bool last_benchmark_instance;
int repetitions;
double min_time;
size_t iterations;
int threads; // Number of concurrent threads to us
};
bool FindBenchmarksInternal(const std::string& re,
std::vector<Benchmark::Instance>* benchmarks,
std::ostream* Err);
bool IsZero(double n);
ConsoleReporter::OutputOptions GetOutputOptions(bool force_no_color = false);
} // end namespace internal
} // end namespace benchmark
#endif // BENCHMARK_API_INTERNAL_H

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// Copyright 2018 Google Inc. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "benchmark/benchmark.h"
BENCHMARK_MAIN();

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// Copyright 2015 Google Inc. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "benchmark_register.h"
#ifndef BENCHMARK_OS_WINDOWS
#ifndef BENCHMARK_OS_FUCHSIA
#include <sys/resource.h>
#endif
#include <sys/time.h>
#include <unistd.h>
#endif
#include <algorithm>
#include <atomic>
#include <condition_variable>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <fstream>
#include <iostream>
#include <memory>
#include <sstream>
#include <thread>
#include "benchmark/benchmark.h"
#include "benchmark_api_internal.h"
#include "check.h"
#include "commandlineflags.h"
#include "complexity.h"
#include "internal_macros.h"
#include "log.h"
#include "mutex.h"
#include "re.h"
#include "statistics.h"
#include "string_util.h"
#include "timers.h"
namespace benchmark {
namespace {
// For non-dense Range, intermediate values are powers of kRangeMultiplier.
static const int kRangeMultiplier = 8;
// The size of a benchmark family determines is the number of inputs to repeat
// the benchmark on. If this is "large" then warn the user during configuration.
static const size_t kMaxFamilySize = 100;
} // end namespace
namespace internal {
//=============================================================================//
// BenchmarkFamilies
//=============================================================================//
// Class for managing registered benchmarks. Note that each registered
// benchmark identifies a family of related benchmarks to run.
class BenchmarkFamilies {
public:
static BenchmarkFamilies* GetInstance();
// Registers a benchmark family and returns the index assigned to it.
size_t AddBenchmark(std::unique_ptr<Benchmark> family);
// Clear all registered benchmark families.
void ClearBenchmarks();
// Extract the list of benchmark instances that match the specified
// regular expression.
bool FindBenchmarks(std::string re,
std::vector<Benchmark::Instance>* benchmarks,
std::ostream* Err);
private:
BenchmarkFamilies() {}
std::vector<std::unique_ptr<Benchmark>> families_;
Mutex mutex_;
};
BenchmarkFamilies* BenchmarkFamilies::GetInstance() {
static BenchmarkFamilies instance;
return &instance;
}
size_t BenchmarkFamilies::AddBenchmark(std::unique_ptr<Benchmark> family) {
MutexLock l(mutex_);
size_t index = families_.size();
families_.push_back(std::move(family));
return index;
}
void BenchmarkFamilies::ClearBenchmarks() {
MutexLock l(mutex_);
families_.clear();
families_.shrink_to_fit();
}
bool BenchmarkFamilies::FindBenchmarks(
std::string spec, std::vector<Benchmark::Instance>* benchmarks,
std::ostream* ErrStream) {
CHECK(ErrStream);
auto& Err = *ErrStream;
// Make regular expression out of command-line flag
std::string error_msg;
Regex re;
bool isNegativeFilter = false;
if(spec[0] == '-') {
spec.replace(0, 1, "");
isNegativeFilter = true;
}
if (!re.Init(spec, &error_msg)) {
Err << "Could not compile benchmark re: " << error_msg << std::endl;
return false;
}
// Special list of thread counts to use when none are specified
const std::vector<int> one_thread = {1};
MutexLock l(mutex_);
for (std::unique_ptr<Benchmark>& family : families_) {
// Family was deleted or benchmark doesn't match
if (!family) continue;
if (family->ArgsCnt() == -1) {
family->Args({});
}
const std::vector<int>* thread_counts =
(family->thread_counts_.empty()
? &one_thread
: &static_cast<const std::vector<int>&>(family->thread_counts_));
const size_t family_size = family->args_.size() * thread_counts->size();
// The benchmark will be run at least 'family_size' different inputs.
// If 'family_size' is very large warn the user.
if (family_size > kMaxFamilySize) {
Err << "The number of inputs is very large. " << family->name_
<< " will be repeated at least " << family_size << " times.\n";
}
// reserve in the special case the regex ".", since we know the final
// family size.
if (spec == ".") benchmarks->reserve(family_size);
for (auto const& args : family->args_) {
for (int num_threads : *thread_counts) {
Benchmark::Instance instance;
instance.name = family->name_;
instance.benchmark = family.get();
instance.report_mode = family->report_mode_;
instance.arg = args;
instance.time_unit = family->time_unit_;
instance.range_multiplier = family->range_multiplier_;
instance.min_time = family->min_time_;
instance.iterations = family->iterations_;
instance.repetitions = family->repetitions_;
instance.use_real_time = family->use_real_time_;
instance.use_manual_time = family->use_manual_time_;
instance.complexity = family->complexity_;
instance.complexity_lambda = family->complexity_lambda_;
instance.statistics = &family->statistics_;
instance.threads = num_threads;
// Add arguments to instance name
size_t arg_i = 0;
for (auto const& arg : args) {
instance.name += "/";
if (arg_i < family->arg_names_.size()) {
const auto& arg_name = family->arg_names_[arg_i];
if (!arg_name.empty()) {
instance.name +=
StrFormat("%s:", family->arg_names_[arg_i].c_str());
}
}
instance.name += StrFormat("%d", arg);
++arg_i;
}
if (!IsZero(family->min_time_))
instance.name += StrFormat("/min_time:%0.3f", family->min_time_);
if (family->iterations_ != 0)
instance.name += StrFormat("/iterations:%d", family->iterations_);
if (family->repetitions_ != 0)
instance.name += StrFormat("/repeats:%d", family->repetitions_);
if (family->use_manual_time_) {
instance.name += "/manual_time";
} else if (family->use_real_time_) {
instance.name += "/real_time";
}
// Add the number of threads used to the name
if (!family->thread_counts_.empty()) {
instance.name += StrFormat("/threads:%d", instance.threads);
}
if ((re.Match(instance.name) && !isNegativeFilter) ||
(!re.Match(instance.name) && isNegativeFilter)) {
instance.last_benchmark_instance = (&args == &family->args_.back());
benchmarks->push_back(std::move(instance));
}
}
}
}
return true;
}
Benchmark* RegisterBenchmarkInternal(Benchmark* bench) {
std::unique_ptr<Benchmark> bench_ptr(bench);
BenchmarkFamilies* families = BenchmarkFamilies::GetInstance();
families->AddBenchmark(std::move(bench_ptr));
return bench;
}
// FIXME: This function is a hack so that benchmark.cc can access
// `BenchmarkFamilies`
bool FindBenchmarksInternal(const std::string& re,
std::vector<Benchmark::Instance>* benchmarks,
std::ostream* Err) {
return BenchmarkFamilies::GetInstance()->FindBenchmarks(re, benchmarks, Err);
}
//=============================================================================//
// Benchmark
//=============================================================================//
Benchmark::Benchmark(const char* name)
: name_(name),
report_mode_(RM_Unspecified),
time_unit_(kNanosecond),
range_multiplier_(kRangeMultiplier),
min_time_(0),
iterations_(0),
repetitions_(0),
use_real_time_(false),
use_manual_time_(false),
complexity_(oNone),
complexity_lambda_(nullptr) {
ComputeStatistics("mean", StatisticsMean);
ComputeStatistics("median", StatisticsMedian);
ComputeStatistics("stddev", StatisticsStdDev);
}
Benchmark::~Benchmark() {}
Benchmark* Benchmark::Arg(int64_t x) {
CHECK(ArgsCnt() == -1 || ArgsCnt() == 1);
args_.push_back({x});
return this;
}
Benchmark* Benchmark::Unit(TimeUnit unit) {
time_unit_ = unit;
return this;
}
Benchmark* Benchmark::Range(int64_t start, int64_t limit) {
CHECK(ArgsCnt() == -1 || ArgsCnt() == 1);
std::vector<int64_t> arglist;
AddRange(&arglist, start, limit, range_multiplier_);
for (int64_t i : arglist) {
args_.push_back({i});
}
return this;
}
Benchmark* Benchmark::Ranges(
const std::vector<std::pair<int64_t, int64_t>>& ranges) {
CHECK(ArgsCnt() == -1 || ArgsCnt() == static_cast<int>(ranges.size()));
std::vector<std::vector<int64_t>> arglists(ranges.size());
std::size_t total = 1;
for (std::size_t i = 0; i < ranges.size(); i++) {
AddRange(&arglists[i], ranges[i].first, ranges[i].second,
range_multiplier_);
total *= arglists[i].size();
}
std::vector<std::size_t> ctr(arglists.size(), 0);
for (std::size_t i = 0; i < total; i++) {
std::vector<int64_t> tmp;
tmp.reserve(arglists.size());
for (std::size_t j = 0; j < arglists.size(); j++) {
tmp.push_back(arglists[j].at(ctr[j]));
}
args_.push_back(std::move(tmp));
for (std::size_t j = 0; j < arglists.size(); j++) {
if (ctr[j] + 1 < arglists[j].size()) {
++ctr[j];
break;
}
ctr[j] = 0;
}
}
return this;
}
Benchmark* Benchmark::ArgName(const std::string& name) {
CHECK(ArgsCnt() == -1 || ArgsCnt() == 1);
arg_names_ = {name};
return this;
}
Benchmark* Benchmark::ArgNames(const std::vector<std::string>& names) {
CHECK(ArgsCnt() == -1 || ArgsCnt() == static_cast<int>(names.size()));
arg_names_ = names;
return this;
}
Benchmark* Benchmark::DenseRange(int64_t start, int64_t limit, int step) {
CHECK(ArgsCnt() == -1 || ArgsCnt() == 1);
CHECK_GE(start, 0);
CHECK_LE(start, limit);
for (int64_t arg = start; arg <= limit; arg += step) {
args_.push_back({arg});
}
return this;
}
Benchmark* Benchmark::Args(const std::vector<int64_t>& args) {
CHECK(ArgsCnt() == -1 || ArgsCnt() == static_cast<int>(args.size()));
args_.push_back(args);
return this;
}
Benchmark* Benchmark::Apply(void (*custom_arguments)(Benchmark* benchmark)) {
custom_arguments(this);
return this;
}
Benchmark* Benchmark::RangeMultiplier(int multiplier) {
CHECK(multiplier > 1);
range_multiplier_ = multiplier;
return this;
}
Benchmark* Benchmark::MinTime(double t) {
CHECK(t > 0.0);
CHECK(iterations_ == 0);
min_time_ = t;
return this;
}
Benchmark* Benchmark::Iterations(size_t n) {
CHECK(n > 0);
CHECK(IsZero(min_time_));
iterations_ = n;
return this;
}
Benchmark* Benchmark::Repetitions(int n) {
CHECK(n > 0);
repetitions_ = n;
return this;
}
Benchmark* Benchmark::ReportAggregatesOnly(bool value) {
report_mode_ = value ? RM_ReportAggregatesOnly : RM_Default;
return this;
}
Benchmark* Benchmark::UseRealTime() {
CHECK(!use_manual_time_)
<< "Cannot set UseRealTime and UseManualTime simultaneously.";
use_real_time_ = true;
return this;
}
Benchmark* Benchmark::UseManualTime() {
CHECK(!use_real_time_)
<< "Cannot set UseRealTime and UseManualTime simultaneously.";
use_manual_time_ = true;
return this;
}
Benchmark* Benchmark::Complexity(BigO complexity) {
complexity_ = complexity;
return this;
}
Benchmark* Benchmark::Complexity(BigOFunc* complexity) {
complexity_lambda_ = complexity;
complexity_ = oLambda;
return this;
}
Benchmark* Benchmark::ComputeStatistics(std::string name,
StatisticsFunc* statistics) {
statistics_.emplace_back(name, statistics);
return this;
}
Benchmark* Benchmark::Threads(int t) {
CHECK_GT(t, 0);
thread_counts_.push_back(t);
return this;
}
Benchmark* Benchmark::ThreadRange(int min_threads, int max_threads) {
CHECK_GT(min_threads, 0);
CHECK_GE(max_threads, min_threads);
AddRange(&thread_counts_, min_threads, max_threads, 2);
return this;
}
Benchmark* Benchmark::DenseThreadRange(int min_threads, int max_threads,
int stride) {
CHECK_GT(min_threads, 0);
CHECK_GE(max_threads, min_threads);
CHECK_GE(stride, 1);
for (auto i = min_threads; i < max_threads; i += stride) {
thread_counts_.push_back(i);
}
thread_counts_.push_back(max_threads);
return this;
}
Benchmark* Benchmark::ThreadPerCpu() {
thread_counts_.push_back(CPUInfo::Get().num_cpus);
return this;
}
void Benchmark::SetName(const char* name) { name_ = name; }
int Benchmark::ArgsCnt() const {
if (args_.empty()) {
if (arg_names_.empty()) return -1;
return static_cast<int>(arg_names_.size());
}
return static_cast<int>(args_.front().size());
}
//=============================================================================//
// FunctionBenchmark
//=============================================================================//
void FunctionBenchmark::Run(State& st) { func_(st); }
} // end namespace internal
void ClearRegisteredBenchmarks() {
internal::BenchmarkFamilies::GetInstance()->ClearBenchmarks();
}
} // end namespace benchmark

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#ifndef BENCHMARK_REGISTER_H
#define BENCHMARK_REGISTER_H
#include <vector>
#include "check.h"
template <typename T>
void AddRange(std::vector<T>* dst, T lo, T hi, int mult) {
CHECK_GE(lo, 0);
CHECK_GE(hi, lo);
CHECK_GE(mult, 2);
// Add "lo"
dst->push_back(lo);
static const T kmax = std::numeric_limits<T>::max();
// Now space out the benchmarks in multiples of "mult"
for (T i = 1; i < kmax / mult; i *= mult) {
if (i >= hi) break;
if (i > lo) {
dst->push_back(i);
}
}
// Add "hi" (if different from "lo")
if (hi != lo) {
dst->push_back(hi);
}
}
#endif // BENCHMARK_REGISTER_H

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#ifndef CHECK_H_
#define CHECK_H_
#include <cstdlib>
#include <ostream>
#include <cmath>
#include "internal_macros.h"
#include "log.h"
namespace benchmark {
namespace internal {
typedef void(AbortHandlerT)();
inline AbortHandlerT*& GetAbortHandler() {
static AbortHandlerT* handler = &std::abort;
return handler;
}
BENCHMARK_NORETURN inline void CallAbortHandler() {
GetAbortHandler()();
std::abort(); // fallback to enforce noreturn
}
// CheckHandler is the class constructed by failing CHECK macros. CheckHandler
// will log information about the failures and abort when it is destructed.
class CheckHandler {
public:
CheckHandler(const char* check, const char* file, const char* func, int line)
: log_(GetErrorLogInstance()) {
log_ << file << ":" << line << ": " << func << ": Check `" << check
<< "' failed. ";
}
LogType& GetLog() { return log_; }
BENCHMARK_NORETURN ~CheckHandler() BENCHMARK_NOEXCEPT_OP(false) {
log_ << std::endl;
CallAbortHandler();
}
CheckHandler& operator=(const CheckHandler&) = delete;
CheckHandler(const CheckHandler&) = delete;
CheckHandler() = delete;
private:
LogType& log_;
};
} // end namespace internal
} // end namespace benchmark
// The CHECK macro returns a std::ostream object that can have extra information
// written to it.
#ifndef NDEBUG
#define CHECK(b) \
(b ? ::benchmark::internal::GetNullLogInstance() \
: ::benchmark::internal::CheckHandler(#b, __FILE__, __func__, __LINE__) \
.GetLog())
#else
#define CHECK(b) ::benchmark::internal::GetNullLogInstance()
#endif
#define CHECK_EQ(a, b) CHECK((a) == (b))
#define CHECK_NE(a, b) CHECK((a) != (b))
#define CHECK_GE(a, b) CHECK((a) >= (b))
#define CHECK_LE(a, b) CHECK((a) <= (b))
#define CHECK_GT(a, b) CHECK((a) > (b))
#define CHECK_LT(a, b) CHECK((a) < (b))
#define CHECK_FLOAT_EQ(a, b, eps) CHECK(std::fabs((a) - (b)) < (eps))
#define CHECK_FLOAT_NE(a, b, eps) CHECK(std::fabs((a) - (b)) >= (eps))
#define CHECK_FLOAT_GE(a, b, eps) CHECK((a) - (b) > -(eps))
#define CHECK_FLOAT_LE(a, b, eps) CHECK((b) - (a) > -(eps))
#define CHECK_FLOAT_GT(a, b, eps) CHECK((a) - (b) > (eps))
#define CHECK_FLOAT_LT(a, b, eps) CHECK((b) - (a) > (eps))
#endif // CHECK_H_

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// Copyright 2015 Google Inc. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "colorprint.h"
#include <cstdarg>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <memory>
#include <string>
#include "check.h"
#include "internal_macros.h"
#ifdef BENCHMARK_OS_WINDOWS
#include <Windows.h>
#include <io.h>
#else
#include <unistd.h>
#endif // BENCHMARK_OS_WINDOWS
namespace benchmark {
namespace {
#ifdef BENCHMARK_OS_WINDOWS
typedef WORD PlatformColorCode;
#else
typedef const char* PlatformColorCode;
#endif
PlatformColorCode GetPlatformColorCode(LogColor color) {
#ifdef BENCHMARK_OS_WINDOWS
switch (color) {
case COLOR_RED:
return FOREGROUND_RED;
case COLOR_GREEN:
return FOREGROUND_GREEN;
case COLOR_YELLOW:
return FOREGROUND_RED | FOREGROUND_GREEN;
case COLOR_BLUE:
return FOREGROUND_BLUE;
case COLOR_MAGENTA:
return FOREGROUND_BLUE | FOREGROUND_RED;
case COLOR_CYAN:
return FOREGROUND_BLUE | FOREGROUND_GREEN;
case COLOR_WHITE: // fall through to default
default:
return 0;
}
#else
switch (color) {
case COLOR_RED:
return "1";
case COLOR_GREEN:
return "2";
case COLOR_YELLOW:
return "3";
case COLOR_BLUE:
return "4";
case COLOR_MAGENTA:
return "5";
case COLOR_CYAN:
return "6";
case COLOR_WHITE:
return "7";
default:
return nullptr;
};
#endif
}
} // end namespace
std::string FormatString(const char* msg, va_list args) {
// we might need a second shot at this, so pre-emptivly make a copy
va_list args_cp;
va_copy(args_cp, args);
std::size_t size = 256;
char local_buff[256];
auto ret = vsnprintf(local_buff, size, msg, args_cp);
va_end(args_cp);
// currently there is no error handling for failure, so this is hack.
CHECK(ret >= 0);
if (ret == 0) // handle empty expansion
return {};
else if (static_cast<size_t>(ret) < size)
return local_buff;
else {
// we did not provide a long enough buffer on our first attempt.
size = (size_t)ret + 1; // + 1 for the null byte
std::unique_ptr<char[]> buff(new char[size]);
ret = vsnprintf(buff.get(), size, msg, args);
CHECK(ret > 0 && ((size_t)ret) < size);
return buff.get();
}
}
std::string FormatString(const char* msg, ...) {
va_list args;
va_start(args, msg);
auto tmp = FormatString(msg, args);
va_end(args);
return tmp;
}
void ColorPrintf(std::ostream& out, LogColor color, const char* fmt, ...) {
va_list args;
va_start(args, fmt);
ColorPrintf(out, color, fmt, args);
va_end(args);
}
void ColorPrintf(std::ostream& out, LogColor color, const char* fmt,
va_list args) {
#ifdef BENCHMARK_OS_WINDOWS
((void)out); // suppress unused warning
const HANDLE stdout_handle = GetStdHandle(STD_OUTPUT_HANDLE);
// Gets the current text color.
CONSOLE_SCREEN_BUFFER_INFO buffer_info;
GetConsoleScreenBufferInfo(stdout_handle, &buffer_info);
const WORD old_color_attrs = buffer_info.wAttributes;
// We need to flush the stream buffers into the console before each
// SetConsoleTextAttribute call lest it affect the text that is already
// printed but has not yet reached the console.
fflush(stdout);
SetConsoleTextAttribute(stdout_handle,
GetPlatformColorCode(color) | FOREGROUND_INTENSITY);
vprintf(fmt, args);
fflush(stdout);
// Restores the text color.
SetConsoleTextAttribute(stdout_handle, old_color_attrs);
#else
const char* color_code = GetPlatformColorCode(color);
if (color_code) out << FormatString("\033[0;3%sm", color_code);
out << FormatString(fmt, args) << "\033[m";
#endif
}
bool IsColorTerminal() {
#if BENCHMARK_OS_WINDOWS
// On Windows the TERM variable is usually not set, but the
// console there does support colors.
return 0 != _isatty(_fileno(stdout));
#else
// On non-Windows platforms, we rely on the TERM variable. This list of
// supported TERM values is copied from Google Test:
// <https://github.com/google/googletest/blob/master/googletest/src/gtest.cc#L2925>.
const char* const SUPPORTED_TERM_VALUES[] = {
"xterm", "xterm-color", "xterm-256color",
"screen", "screen-256color", "tmux",
"tmux-256color", "rxvt-unicode", "rxvt-unicode-256color",
"linux", "cygwin",
};
const char* const term = getenv("TERM");
bool term_supports_color = false;
for (const char* candidate : SUPPORTED_TERM_VALUES) {
if (term && 0 == strcmp(term, candidate)) {
term_supports_color = true;
break;
}
}
return 0 != isatty(fileno(stdout)) && term_supports_color;
#endif // BENCHMARK_OS_WINDOWS
}
} // end namespace benchmark

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#ifndef BENCHMARK_COLORPRINT_H_
#define BENCHMARK_COLORPRINT_H_
#include <cstdarg>
#include <iostream>
#include <string>
namespace benchmark {
enum LogColor {
COLOR_DEFAULT,
COLOR_RED,
COLOR_GREEN,
COLOR_YELLOW,
COLOR_BLUE,
COLOR_MAGENTA,
COLOR_CYAN,
COLOR_WHITE
};
std::string FormatString(const char* msg, va_list args);
std::string FormatString(const char* msg, ...);
void ColorPrintf(std::ostream& out, LogColor color, const char* fmt,
va_list args);
void ColorPrintf(std::ostream& out, LogColor color, const char* fmt, ...);
// Returns true if stdout appears to be a terminal that supports colored
// output, false otherwise.
bool IsColorTerminal();
} // end namespace benchmark
#endif // BENCHMARK_COLORPRINT_H_

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// Copyright 2015 Google Inc. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "commandlineflags.h"
#include <cctype>
#include <cstdlib>
#include <cstring>
#include <iostream>
#include <limits>
namespace benchmark {
// Parses 'str' for a 32-bit signed integer. If successful, writes
// the result to *value and returns true; otherwise leaves *value
// unchanged and returns false.
bool ParseInt32(const std::string& src_text, const char* str, int32_t* value) {
// Parses the environment variable as a decimal integer.
char* end = nullptr;
const long long_value = strtol(str, &end, 10); // NOLINT
// Has strtol() consumed all characters in the string?
if (*end != '\0') {
// No - an invalid character was encountered.
std::cerr << src_text << " is expected to be a 32-bit integer, "
<< "but actually has value \"" << str << "\".\n";
return false;
}
// Is the parsed value in the range of an Int32?
const int32_t result = static_cast<int32_t>(long_value);
if (long_value == std::numeric_limits<long>::max() ||
long_value == std::numeric_limits<long>::min() ||
// The parsed value overflows as a long. (strtol() returns
// LONG_MAX or LONG_MIN when the input overflows.)
result != long_value
// The parsed value overflows as an Int32.
) {
std::cerr << src_text << " is expected to be a 32-bit integer, "
<< "but actually has value \"" << str << "\", "
<< "which overflows.\n";
return false;
}
*value = result;
return true;
}
// Parses 'str' for a double. If successful, writes the result to *value and
// returns true; otherwise leaves *value unchanged and returns false.
bool ParseDouble(const std::string& src_text, const char* str, double* value) {
// Parses the environment variable as a decimal integer.
char* end = nullptr;
const double double_value = strtod(str, &end); // NOLINT
// Has strtol() consumed all characters in the string?
if (*end != '\0') {
// No - an invalid character was encountered.
std::cerr << src_text << " is expected to be a double, "
<< "but actually has value \"" << str << "\".\n";
return false;
}
*value = double_value;
return true;
}
// Returns the name of the environment variable corresponding to the
// given flag. For example, FlagToEnvVar("foo") will return
// "BENCHMARK_FOO" in the open-source version.
static std::string FlagToEnvVar(const char* flag) {
const std::string flag_str(flag);
std::string env_var;
for (size_t i = 0; i != flag_str.length(); ++i)
env_var += static_cast<char>(::toupper(flag_str.c_str()[i]));
return "BENCHMARK_" + env_var;
}
// Reads and returns the Boolean environment variable corresponding to
// the given flag; if it's not set, returns default_value.
//
// The value is considered true iff it's not "0".
bool BoolFromEnv(const char* flag, bool default_value) {
const std::string env_var = FlagToEnvVar(flag);
const char* const string_value = getenv(env_var.c_str());
return string_value == nullptr ? default_value
: strcmp(string_value, "0") != 0;
}
// Reads and returns a 32-bit integer stored in the environment
// variable corresponding to the given flag; if it isn't set or
// doesn't represent a valid 32-bit integer, returns default_value.
int32_t Int32FromEnv(const char* flag, int32_t default_value) {
const std::string env_var = FlagToEnvVar(flag);
const char* const string_value = getenv(env_var.c_str());
if (string_value == nullptr) {
// The environment variable is not set.
return default_value;
}
int32_t result = default_value;
if (!ParseInt32(std::string("Environment variable ") + env_var, string_value,
&result)) {
std::cout << "The default value " << default_value << " is used.\n";
return default_value;
}
return result;
}
// Reads and returns the string environment variable corresponding to
// the given flag; if it's not set, returns default_value.
const char* StringFromEnv(const char* flag, const char* default_value) {
const std::string env_var = FlagToEnvVar(flag);
const char* const value = getenv(env_var.c_str());
return value == nullptr ? default_value : value;
}
// Parses a string as a command line flag. The string should have
// the format "--flag=value". When def_optional is true, the "=value"
// part can be omitted.
//
// Returns the value of the flag, or nullptr if the parsing failed.
const char* ParseFlagValue(const char* str, const char* flag,
bool def_optional) {
// str and flag must not be nullptr.
if (str == nullptr || flag == nullptr) return nullptr;
// The flag must start with "--".
const std::string flag_str = std::string("--") + std::string(flag);
const size_t flag_len = flag_str.length();
if (strncmp(str, flag_str.c_str(), flag_len) != 0) return nullptr;
// Skips the flag name.
const char* flag_end = str + flag_len;
// When def_optional is true, it's OK to not have a "=value" part.
if (def_optional && (flag_end[0] == '\0')) return flag_end;
// If def_optional is true and there are more characters after the
// flag name, or if def_optional is false, there must be a '=' after
// the flag name.
if (flag_end[0] != '=') return nullptr;
// Returns the string after "=".
return flag_end + 1;
}
bool ParseBoolFlag(const char* str, const char* flag, bool* value) {
// Gets the value of the flag as a string.
const char* const value_str = ParseFlagValue(str, flag, true);
// Aborts if the parsing failed.
if (value_str == nullptr) return false;
// Converts the string value to a bool.
*value = IsTruthyFlagValue(value_str);
return true;
}
bool ParseInt32Flag(const char* str, const char* flag, int32_t* value) {
// Gets the value of the flag as a string.
const char* const value_str = ParseFlagValue(str, flag, false);
// Aborts if the parsing failed.
if (value_str == nullptr) return false;
// Sets *value to the value of the flag.
return ParseInt32(std::string("The value of flag --") + flag, value_str,
value);
}
bool ParseDoubleFlag(const char* str, const char* flag, double* value) {
// Gets the value of the flag as a string.
const char* const value_str = ParseFlagValue(str, flag, false);
// Aborts if the parsing failed.
if (value_str == nullptr) return false;
// Sets *value to the value of the flag.
return ParseDouble(std::string("The value of flag --") + flag, value_str,
value);
}
bool ParseStringFlag(const char* str, const char* flag, std::string* value) {
// Gets the value of the flag as a string.
const char* const value_str = ParseFlagValue(str, flag, false);
// Aborts if the parsing failed.
if (value_str == nullptr) return false;
*value = value_str;
return true;
}
bool IsFlag(const char* str, const char* flag) {
return (ParseFlagValue(str, flag, true) != nullptr);
}
bool IsTruthyFlagValue(const std::string& value) {
if (value.empty()) return true;
char ch = value[0];
return isalnum(ch) &&
!(ch == '0' || ch == 'f' || ch == 'F' || ch == 'n' || ch == 'N');
}
} // end namespace benchmark

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#ifndef BENCHMARK_COMMANDLINEFLAGS_H_
#define BENCHMARK_COMMANDLINEFLAGS_H_
#include <cstdint>
#include <string>
// Macro for referencing flags.
#define FLAG(name) FLAGS_##name
// Macros for declaring flags.
#define DECLARE_bool(name) extern bool FLAG(name)
#define DECLARE_int32(name) extern int32_t FLAG(name)
#define DECLARE_int64(name) extern int64_t FLAG(name)
#define DECLARE_double(name) extern double FLAG(name)
#define DECLARE_string(name) extern std::string FLAG(name)
// Macros for defining flags.
#define DEFINE_bool(name, default_val, doc) bool FLAG(name) = (default_val)
#define DEFINE_int32(name, default_val, doc) int32_t FLAG(name) = (default_val)
#define DEFINE_int64(name, default_val, doc) int64_t FLAG(name) = (default_val)
#define DEFINE_double(name, default_val, doc) double FLAG(name) = (default_val)
#define DEFINE_string(name, default_val, doc) \
std::string FLAG(name) = (default_val)
namespace benchmark {
// Parses 'str' for a 32-bit signed integer. If successful, writes the result
// to *value and returns true; otherwise leaves *value unchanged and returns
// false.
bool ParseInt32(const std::string& src_text, const char* str, int32_t* value);
// Parses a bool/Int32/string from the environment variable
// corresponding to the given Google Test flag.
bool BoolFromEnv(const char* flag, bool default_val);
int32_t Int32FromEnv(const char* flag, int32_t default_val);
double DoubleFromEnv(const char* flag, double default_val);
const char* StringFromEnv(const char* flag, const char* default_val);
// Parses a string for a bool flag, in the form of either
// "--flag=value" or "--flag".
//
// In the former case, the value is taken as true if it passes IsTruthyValue().
//
// In the latter case, the value is taken as true.
//
// On success, stores the value of the flag in *value, and returns
// true. On failure, returns false without changing *value.
bool ParseBoolFlag(const char* str, const char* flag, bool* value);
// Parses a string for an Int32 flag, in the form of
// "--flag=value".
//
// On success, stores the value of the flag in *value, and returns
// true. On failure, returns false without changing *value.
bool ParseInt32Flag(const char* str, const char* flag, int32_t* value);
// Parses a string for a Double flag, in the form of
// "--flag=value".
//
// On success, stores the value of the flag in *value, and returns
// true. On failure, returns false without changing *value.
bool ParseDoubleFlag(const char* str, const char* flag, double* value);
// Parses a string for a string flag, in the form of
// "--flag=value".
//
// On success, stores the value of the flag in *value, and returns
// true. On failure, returns false without changing *value.
bool ParseStringFlag(const char* str, const char* flag, std::string* value);
// Returns true if the string matches the flag.
bool IsFlag(const char* str, const char* flag);
// Returns true unless value starts with one of: '0', 'f', 'F', 'n' or 'N', or
// some non-alphanumeric character. As a special case, also returns true if
// value is the empty string.
bool IsTruthyFlagValue(const std::string& value);
} // end namespace benchmark
#endif // BENCHMARK_COMMANDLINEFLAGS_H_

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// Copyright 2016 Ismael Jimenez Martinez. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// Source project : https://github.com/ismaelJimenez/cpp.leastsq
// Adapted to be used with google benchmark
#include "benchmark/benchmark.h"
#include <algorithm>
#include <cmath>
#include "check.h"
#include "complexity.h"
namespace benchmark {
// Internal function to calculate the different scalability forms
BigOFunc* FittingCurve(BigO complexity) {
switch (complexity) {
case oN:
return [](int64_t n) -> double { return static_cast<double>(n); };
case oNSquared:
return [](int64_t n) -> double { return std::pow(n, 2); };
case oNCubed:
return [](int64_t n) -> double { return std::pow(n, 3); };
case oLogN:
return [](int64_t n) { return log2(n); };
case oNLogN:
return [](int64_t n) { return n * log2(n); };
case o1:
default:
return [](int64_t) { return 1.0; };
}
}
// Function to return an string for the calculated complexity
std::string GetBigOString(BigO complexity) {
switch (complexity) {
case oN:
return "N";
case oNSquared:
return "N^2";
case oNCubed:
return "N^3";
case oLogN:
return "lgN";
case oNLogN:
return "NlgN";
case o1:
return "(1)";
default:
return "f(N)";
}
}
// Find the coefficient for the high-order term in the running time, by
// minimizing the sum of squares of relative error, for the fitting curve
// given by the lambda expression.
// - n : Vector containing the size of the benchmark tests.
// - time : Vector containing the times for the benchmark tests.
// - fitting_curve : lambda expression (e.g. [](int64_t n) {return n; };).
// For a deeper explanation on the algorithm logic, look the README file at
// http://github.com/ismaelJimenez/Minimal-Cpp-Least-Squared-Fit
LeastSq MinimalLeastSq(const std::vector<int64_t>& n,
const std::vector<double>& time,
BigOFunc* fitting_curve) {
double sigma_gn = 0.0;
double sigma_gn_squared = 0.0;
double sigma_time = 0.0;
double sigma_time_gn = 0.0;
// Calculate least square fitting parameter
for (size_t i = 0; i < n.size(); ++i) {
double gn_i = fitting_curve(n[i]);
sigma_gn += gn_i;
sigma_gn_squared += gn_i * gn_i;
sigma_time += time[i];
sigma_time_gn += time[i] * gn_i;
}
LeastSq result;
result.complexity = oLambda;
// Calculate complexity.
result.coef = sigma_time_gn / sigma_gn_squared;
// Calculate RMS
double rms = 0.0;
for (size_t i = 0; i < n.size(); ++i) {
double fit = result.coef * fitting_curve(n[i]);
rms += pow((time[i] - fit), 2);
}
// Normalized RMS by the mean of the observed values
double mean = sigma_time / n.size();
result.rms = sqrt(rms / n.size()) / mean;
return result;
}
// Find the coefficient for the high-order term in the running time, by
// minimizing the sum of squares of relative error.
// - n : Vector containing the size of the benchmark tests.
// - time : Vector containing the times for the benchmark tests.
// - complexity : If different than oAuto, the fitting curve will stick to
// this one. If it is oAuto, it will be calculated the best
// fitting curve.
LeastSq MinimalLeastSq(const std::vector<int64_t>& n,
const std::vector<double>& time, const BigO complexity) {
CHECK_EQ(n.size(), time.size());
CHECK_GE(n.size(), 2); // Do not compute fitting curve is less than two
// benchmark runs are given
CHECK_NE(complexity, oNone);
LeastSq best_fit;
if (complexity == oAuto) {
std::vector<BigO> fit_curves = {oLogN, oN, oNLogN, oNSquared, oNCubed};
// Take o1 as default best fitting curve
best_fit = MinimalLeastSq(n, time, FittingCurve(o1));
best_fit.complexity = o1;
// Compute all possible fitting curves and stick to the best one
for (const auto& fit : fit_curves) {
LeastSq current_fit = MinimalLeastSq(n, time, FittingCurve(fit));
if (current_fit.rms < best_fit.rms) {
best_fit = current_fit;
best_fit.complexity = fit;
}
}
} else {
best_fit = MinimalLeastSq(n, time, FittingCurve(complexity));
best_fit.complexity = complexity;
}
return best_fit;
}
std::vector<BenchmarkReporter::Run> ComputeBigO(
const std::vector<BenchmarkReporter::Run>& reports) {
typedef BenchmarkReporter::Run Run;
std::vector<Run> results;
if (reports.size() < 2) return results;
// Accumulators.
std::vector<int64_t> n;
std::vector<double> real_time;
std::vector<double> cpu_time;
// Populate the accumulators.
for (const Run& run : reports) {
CHECK_GT(run.complexity_n, 0) << "Did you forget to call SetComplexityN?";
n.push_back(run.complexity_n);
real_time.push_back(run.real_accumulated_time / run.iterations);
cpu_time.push_back(run.cpu_accumulated_time / run.iterations);
}
LeastSq result_cpu;
LeastSq result_real;
if (reports[0].complexity == oLambda) {
result_cpu = MinimalLeastSq(n, cpu_time, reports[0].complexity_lambda);
result_real = MinimalLeastSq(n, real_time, reports[0].complexity_lambda);
} else {
result_cpu = MinimalLeastSq(n, cpu_time, reports[0].complexity);
result_real = MinimalLeastSq(n, real_time, result_cpu.complexity);
}
std::string benchmark_name =
reports[0].benchmark_name.substr(0, reports[0].benchmark_name.find('/'));
// Get the data from the accumulator to BenchmarkReporter::Run's.
Run big_o;
big_o.benchmark_name = benchmark_name + "_BigO";
big_o.iterations = 0;
big_o.real_accumulated_time = result_real.coef;
big_o.cpu_accumulated_time = result_cpu.coef;
big_o.report_big_o = true;
big_o.complexity = result_cpu.complexity;
// All the time results are reported after being multiplied by the
// time unit multiplier. But since RMS is a relative quantity it
// should not be multiplied at all. So, here, we _divide_ it by the
// multiplier so that when it is multiplied later the result is the
// correct one.
double multiplier = GetTimeUnitMultiplier(reports[0].time_unit);
// Only add label to mean/stddev if it is same for all runs
Run rms;
big_o.report_label = reports[0].report_label;
rms.benchmark_name = benchmark_name + "_RMS";
rms.report_label = big_o.report_label;
rms.iterations = 0;
rms.real_accumulated_time = result_real.rms / multiplier;
rms.cpu_accumulated_time = result_cpu.rms / multiplier;
rms.report_rms = true;
rms.complexity = result_cpu.complexity;
// don't forget to keep the time unit, or we won't be able to
// recover the correct value.
rms.time_unit = reports[0].time_unit;
results.push_back(big_o);
results.push_back(rms);
return results;
}
} // end namespace benchmark

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// Copyright 2016 Ismael Jimenez Martinez. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// Source project : https://github.com/ismaelJimenez/cpp.leastsq
// Adapted to be used with google benchmark
#ifndef COMPLEXITY_H_
#define COMPLEXITY_H_
#include <string>
#include <vector>
#include "benchmark/benchmark.h"
namespace benchmark {
// Return a vector containing the bigO and RMS information for the specified
// list of reports. If 'reports.size() < 2' an empty vector is returned.
std::vector<BenchmarkReporter::Run> ComputeBigO(
const std::vector<BenchmarkReporter::Run>& reports);
// This data structure will contain the result returned by MinimalLeastSq
// - coef : Estimated coeficient for the high-order term as
// interpolated from data.
// - rms : Normalized Root Mean Squared Error.
// - complexity : Scalability form (e.g. oN, oNLogN). In case a scalability
// form has been provided to MinimalLeastSq this will return
// the same value. In case BigO::oAuto has been selected, this
// parameter will return the best fitting curve detected.
struct LeastSq {
LeastSq() : coef(0.0), rms(0.0), complexity(oNone) {}
double coef;
double rms;
BigO complexity;
};
// Function to return an string for the calculated complexity
std::string GetBigOString(BigO complexity);
} // end namespace benchmark
#endif // COMPLEXITY_H_

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// Copyright 2015 Google Inc. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "benchmark/benchmark.h"
#include "complexity.h"
#include "counter.h"
#include <algorithm>
#include <cstdint>
#include <cstdio>
#include <iostream>
#include <string>
#include <tuple>
#include <vector>
#include "check.h"
#include "colorprint.h"
#include "commandlineflags.h"
#include "internal_macros.h"
#include "string_util.h"
#include "timers.h"
namespace benchmark {
bool ConsoleReporter::ReportContext(const Context& context) {
name_field_width_ = context.name_field_width;
printed_header_ = false;
prev_counters_.clear();
PrintBasicContext(&GetErrorStream(), context);
#ifdef BENCHMARK_OS_WINDOWS
if ((output_options_ & OO_Color) && &std::cout != &GetOutputStream()) {
GetErrorStream()
<< "Color printing is only supported for stdout on windows."
" Disabling color printing\n";
output_options_ = static_cast< OutputOptions >(output_options_ & ~OO_Color);
}
#endif
return true;
}
void ConsoleReporter::PrintHeader(const Run& run) {
std::string str = FormatString("%-*s %13s %13s %10s", static_cast<int>(name_field_width_),
"Benchmark", "Time", "CPU", "Iterations");
if(!run.counters.empty()) {
if(output_options_ & OO_Tabular) {
for(auto const& c : run.counters) {
str += FormatString(" %10s", c.first.c_str());
}
} else {
str += " UserCounters...";
}
}
str += "\n";
std::string line = std::string(str.length(), '-');
GetOutputStream() << line << "\n" << str << line << "\n";
}
void ConsoleReporter::ReportRuns(const std::vector<Run>& reports) {
for (const auto& run : reports) {
// print the header:
// --- if none was printed yet
bool print_header = !printed_header_;
// --- or if the format is tabular and this run
// has different fields from the prev header
print_header |= (output_options_ & OO_Tabular) &&
(!internal::SameNames(run.counters, prev_counters_));
if (print_header) {
printed_header_ = true;
prev_counters_ = run.counters;
PrintHeader(run);
}
// As an alternative to printing the headers like this, we could sort
// the benchmarks by header and then print. But this would require
// waiting for the full results before printing, or printing twice.
PrintRunData(run);
}
}
static void IgnoreColorPrint(std::ostream& out, LogColor, const char* fmt,
...) {
va_list args;
va_start(args, fmt);
out << FormatString(fmt, args);
va_end(args);
}
void ConsoleReporter::PrintRunData(const Run& result) {
typedef void(PrinterFn)(std::ostream&, LogColor, const char*, ...);
auto& Out = GetOutputStream();
PrinterFn* printer = (output_options_ & OO_Color) ?
(PrinterFn*)ColorPrintf : IgnoreColorPrint;
auto name_color =
(result.report_big_o || result.report_rms) ? COLOR_BLUE : COLOR_GREEN;
printer(Out, name_color, "%-*s ", name_field_width_,
result.benchmark_name.c_str());
if (result.error_occurred) {
printer(Out, COLOR_RED, "ERROR OCCURRED: \'%s\'",
result.error_message.c_str());
printer(Out, COLOR_DEFAULT, "\n");
return;
}
// Format bytes per second
std::string rate;
if (result.bytes_per_second > 0) {
rate = StrCat(" ", HumanReadableNumber(result.bytes_per_second), "B/s");
}
// Format items per second
std::string items;
if (result.items_per_second > 0) {
items =
StrCat(" ", HumanReadableNumber(result.items_per_second), " items/s");
}
const double real_time = result.GetAdjustedRealTime();
const double cpu_time = result.GetAdjustedCPUTime();
if (result.report_big_o) {
std::string big_o = GetBigOString(result.complexity);
printer(Out, COLOR_YELLOW, "%10.2f %s %10.2f %s ", real_time, big_o.c_str(),
cpu_time, big_o.c_str());
} else if (result.report_rms) {
printer(Out, COLOR_YELLOW, "%10.0f %% %10.0f %% ", real_time * 100,
cpu_time * 100);
} else {
const char* timeLabel = GetTimeUnitString(result.time_unit);
printer(Out, COLOR_YELLOW, "%10.0f %s %10.0f %s ", real_time, timeLabel,
cpu_time, timeLabel);
}
if (!result.report_big_o && !result.report_rms) {
printer(Out, COLOR_CYAN, "%10lld", result.iterations);
}
for (auto& c : result.counters) {
const std::size_t cNameLen = std::max(std::string::size_type(10),
c.first.length());
auto const& s = HumanReadableNumber(c.second.value, 1000);
if (output_options_ & OO_Tabular) {
if (c.second.flags & Counter::kIsRate) {
printer(Out, COLOR_DEFAULT, " %*s/s", cNameLen - 2, s.c_str());
} else {
printer(Out, COLOR_DEFAULT, " %*s", cNameLen, s.c_str());
}
} else {
const char* unit = (c.second.flags & Counter::kIsRate) ? "/s" : "";
printer(Out, COLOR_DEFAULT, " %s=%s%s", c.first.c_str(), s.c_str(),
unit);
}
}
if (!rate.empty()) {
printer(Out, COLOR_DEFAULT, " %*s", 13, rate.c_str());
}
if (!items.empty()) {
printer(Out, COLOR_DEFAULT, " %*s", 18, items.c_str());
}
if (!result.report_label.empty()) {
printer(Out, COLOR_DEFAULT, " %s", result.report_label.c_str());
}
printer(Out, COLOR_DEFAULT, "\n");
}
} // end namespace benchmark

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// Copyright 2015 Google Inc. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "counter.h"
namespace benchmark {
namespace internal {
double Finish(Counter const& c, double cpu_time, double num_threads) {
double v = c.value;
if (c.flags & Counter::kIsRate) {
v /= cpu_time;
}
if (c.flags & Counter::kAvgThreads) {
v /= num_threads;
}
return v;
}
void Finish(UserCounters *l, double cpu_time, double num_threads) {
for (auto &c : *l) {
c.second.value = Finish(c.second, cpu_time, num_threads);
}
}
void Increment(UserCounters *l, UserCounters const& r) {
// add counters present in both or just in *l
for (auto &c : *l) {
auto it = r.find(c.first);
if (it != r.end()) {
c.second.value = c.second + it->second;
}
}
// add counters present in r, but not in *l
for (auto const &tc : r) {
auto it = l->find(tc.first);
if (it == l->end()) {
(*l)[tc.first] = tc.second;
}
}
}
bool SameNames(UserCounters const& l, UserCounters const& r) {
if (&l == &r) return true;
if (l.size() != r.size()) {
return false;
}
for (auto const& c : l) {
if (r.find(c.first) == r.end()) {
return false;
}
}
return true;
}
} // end namespace internal
} // end namespace benchmark

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// Copyright 2015 Google Inc. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "benchmark/benchmark.h"
namespace benchmark {
// these counter-related functions are hidden to reduce API surface.
namespace internal {
void Finish(UserCounters *l, double time, double num_threads);
void Increment(UserCounters *l, UserCounters const& r);
bool SameNames(UserCounters const& l, UserCounters const& r);
} // end namespace internal
} //end namespace benchmark

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// Copyright 2015 Google Inc. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "benchmark/benchmark.h"
#include "complexity.h"
#include <algorithm>
#include <cstdint>
#include <iostream>
#include <string>
#include <tuple>
#include <vector>
#include "string_util.h"
#include "timers.h"
#include "check.h"
// File format reference: http://edoceo.com/utilitas/csv-file-format.
namespace benchmark {
namespace {
std::vector<std::string> elements = {
"name", "iterations", "real_time", "cpu_time",
"time_unit", "bytes_per_second", "items_per_second", "label",
"error_occurred", "error_message"};
} // namespace
bool CSVReporter::ReportContext(const Context& context) {
PrintBasicContext(&GetErrorStream(), context);
return true;
}
void CSVReporter::ReportRuns(const std::vector<Run> & reports) {
std::ostream& Out = GetOutputStream();
if (!printed_header_) {
// save the names of all the user counters
for (const auto& run : reports) {
for (const auto& cnt : run.counters) {
user_counter_names_.insert(cnt.first);
}
}
// print the header
for (auto B = elements.begin(); B != elements.end();) {
Out << *B++;
if (B != elements.end()) Out << ",";
}
for (auto B = user_counter_names_.begin(); B != user_counter_names_.end();) {
Out << ",\"" << *B++ << "\"";
}
Out << "\n";
printed_header_ = true;
} else {
// check that all the current counters are saved in the name set
for (const auto& run : reports) {
for (const auto& cnt : run.counters) {
CHECK(user_counter_names_.find(cnt.first) != user_counter_names_.end())
<< "All counters must be present in each run. "
<< "Counter named \"" << cnt.first
<< "\" was not in a run after being added to the header";
}
}
}
// print results for each run
for (const auto& run : reports) {
PrintRunData(run);
}
}
void CSVReporter::PrintRunData(const Run & run) {
std::ostream& Out = GetOutputStream();
// Field with embedded double-quote characters must be doubled and the field
// delimited with double-quotes.
std::string name = run.benchmark_name;
ReplaceAll(&name, "\"", "\"\"");
Out << '"' << name << "\",";
if (run.error_occurred) {
Out << std::string(elements.size() - 3, ',');
Out << "true,";
std::string msg = run.error_message;
ReplaceAll(&msg, "\"", "\"\"");
Out << '"' << msg << "\"\n";
return;
}
// Do not print iteration on bigO and RMS report
if (!run.report_big_o && !run.report_rms) {
Out << run.iterations;
}
Out << ",";
Out << run.GetAdjustedRealTime() << ",";
Out << run.GetAdjustedCPUTime() << ",";
// Do not print timeLabel on bigO and RMS report
if (run.report_big_o) {
Out << GetBigOString(run.complexity);
} else if (!run.report_rms) {
Out << GetTimeUnitString(run.time_unit);
}
Out << ",";
if (run.bytes_per_second > 0.0) {
Out << run.bytes_per_second;
}
Out << ",";
if (run.items_per_second > 0.0) {
Out << run.items_per_second;
}
Out << ",";
if (!run.report_label.empty()) {
// Field with embedded double-quote characters must be doubled and the field
// delimited with double-quotes.
std::string label = run.report_label;
ReplaceAll(&label, "\"", "\"\"");
Out << "\"" << label << "\"";
}
Out << ",,"; // for error_occurred and error_message
// Print user counters
for (const auto &ucn : user_counter_names_) {
auto it = run.counters.find(ucn);
if(it == run.counters.end()) {
Out << ",";
} else {
Out << "," << it->second;
}
}
Out << '\n';
}
} // end namespace benchmark

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// ----------------------------------------------------------------------
// CycleClock
// A CycleClock tells you the current time in Cycles. The "time"
// is actually time since power-on. This is like time() but doesn't
// involve a system call and is much more precise.
//
// NOTE: Not all cpu/platform/kernel combinations guarantee that this
// clock increments at a constant rate or is synchronized across all logical
// cpus in a system.
//
// If you need the above guarantees, please consider using a different
// API. There are efforts to provide an interface which provides a millisecond
// granularity and implemented as a memory read. A memory read is generally
// cheaper than the CycleClock for many architectures.
//
// Also, in some out of order CPU implementations, the CycleClock is not
// serializing. So if you're trying to count at cycles granularity, your
// data might be inaccurate due to out of order instruction execution.
// ----------------------------------------------------------------------
#ifndef BENCHMARK_CYCLECLOCK_H_
#define BENCHMARK_CYCLECLOCK_H_
#include <cstdint>
#include "benchmark/benchmark.h"
#include "internal_macros.h"
#if defined(BENCHMARK_OS_MACOSX)
#include <mach/mach_time.h>
#endif
// For MSVC, we want to use '_asm rdtsc' when possible (since it works
// with even ancient MSVC compilers), and when not possible the
// __rdtsc intrinsic, declared in <intrin.h>. Unfortunately, in some
// environments, <windows.h> and <intrin.h> have conflicting
// declarations of some other intrinsics, breaking compilation.
// Therefore, we simply declare __rdtsc ourselves. See also
// http://connect.microsoft.com/VisualStudio/feedback/details/262047
#if defined(COMPILER_MSVC) && !defined(_M_IX86)
extern "C" uint64_t __rdtsc();
#pragma intrinsic(__rdtsc)
#endif
#ifndef BENCHMARK_OS_WINDOWS
#include <sys/time.h>
#include <time.h>
#endif
#ifdef BENCHMARK_OS_EMSCRIPTEN
#include <emscripten.h>
#endif
namespace benchmark {
// NOTE: only i386 and x86_64 have been well tested.
// PPC, sparc, alpha, and ia64 are based on
// http://peter.kuscsik.com/wordpress/?p=14
// with modifications by m3b. See also
// https://setisvn.ssl.berkeley.edu/svn/lib/fftw-3.0.1/kernel/cycle.h
namespace cycleclock {
// This should return the number of cycles since power-on. Thread-safe.
inline BENCHMARK_ALWAYS_INLINE int64_t Now() {
#if defined(BENCHMARK_OS_MACOSX)
// this goes at the top because we need ALL Macs, regardless of
// architecture, to return the number of "mach time units" that
// have passed since startup. See sysinfo.cc where
// InitializeSystemInfo() sets the supposed cpu clock frequency of
// macs to the number of mach time units per second, not actual
// CPU clock frequency (which can change in the face of CPU
// frequency scaling). Also note that when the Mac sleeps, this
// counter pauses; it does not continue counting, nor does it
// reset to zero.
return mach_absolute_time();
#elif defined(BENCHMARK_OS_EMSCRIPTEN)
// this goes above x86-specific code because old versions of Emscripten
// define __x86_64__, although they have nothing to do with it.
return static_cast<int64_t>(emscripten_get_now() * 1e+6);
#elif defined(__i386__)
int64_t ret;
__asm__ volatile("rdtsc" : "=A"(ret));
return ret;
#elif defined(__x86_64__) || defined(__amd64__)
uint64_t low, high;
__asm__ volatile("rdtsc" : "=a"(low), "=d"(high));
return (high << 32) | low;
#elif defined(__powerpc__) || defined(__ppc__)
// This returns a time-base, which is not always precisely a cycle-count.
int64_t tbl, tbu0, tbu1;
asm("mftbu %0" : "=r"(tbu0));
asm("mftb %0" : "=r"(tbl));
asm("mftbu %0" : "=r"(tbu1));
tbl &= -static_cast<int64_t>(tbu0 == tbu1);
// high 32 bits in tbu1; low 32 bits in tbl (tbu0 is garbage)
return (tbu1 << 32) | tbl;
#elif defined(__sparc__)
int64_t tick;
asm(".byte 0x83, 0x41, 0x00, 0x00");
asm("mov %%g1, %0" : "=r"(tick));
return tick;
#elif defined(__ia64__)
int64_t itc;
asm("mov %0 = ar.itc" : "=r"(itc));
return itc;
#elif defined(COMPILER_MSVC) && defined(_M_IX86)
// Older MSVC compilers (like 7.x) don't seem to support the
// __rdtsc intrinsic properly, so I prefer to use _asm instead
// when I know it will work. Otherwise, I'll use __rdtsc and hope
// the code is being compiled with a non-ancient compiler.
_asm rdtsc
#elif defined(COMPILER_MSVC)
return __rdtsc();
#elif defined(BENCHMARK_OS_NACL)
// Native Client validator on x86/x86-64 allows RDTSC instructions,
// and this case is handled above. Native Client validator on ARM
// rejects MRC instructions (used in the ARM-specific sequence below),
// so we handle it here. Portable Native Client compiles to
// architecture-agnostic bytecode, which doesn't provide any
// cycle counter access mnemonics.
// Native Client does not provide any API to access cycle counter.
// Use clock_gettime(CLOCK_MONOTONIC, ...) instead of gettimeofday
// because is provides nanosecond resolution (which is noticable at
// least for PNaCl modules running on x86 Mac & Linux).
// Initialize to always return 0 if clock_gettime fails.
struct timespec ts = { 0, 0 };
clock_gettime(CLOCK_MONOTONIC, &ts);
return static_cast<int64_t>(ts.tv_sec) * 1000000000 + ts.tv_nsec;
#elif defined(__aarch64__)
// System timer of ARMv8 runs at a different frequency than the CPU's.
// The frequency is fixed, typically in the range 1-50MHz. It can be
// read at CNTFRQ special register. We assume the OS has set up
// the virtual timer properly.
int64_t virtual_timer_value;
asm volatile("mrs %0, cntvct_el0" : "=r"(virtual_timer_value));
return virtual_timer_value;
#elif defined(__ARM_ARCH)
// V6 is the earliest arch that has a standard cyclecount
// Native Client validator doesn't allow MRC instructions.
#if (__ARM_ARCH >= 6)
uint32_t pmccntr;
uint32_t pmuseren;
uint32_t pmcntenset;
// Read the user mode perf monitor counter access permissions.
asm volatile("mrc p15, 0, %0, c9, c14, 0" : "=r"(pmuseren));
if (pmuseren & 1) { // Allows reading perfmon counters for user mode code.
asm volatile("mrc p15, 0, %0, c9, c12, 1" : "=r"(pmcntenset));
if (pmcntenset & 0x80000000ul) { // Is it counting?
asm volatile("mrc p15, 0, %0, c9, c13, 0" : "=r"(pmccntr));
// The counter is set up to count every 64th cycle
return static_cast<int64_t>(pmccntr) * 64; // Should optimize to << 6
}
}
#endif
struct timeval tv;
gettimeofday(&tv, nullptr);
return static_cast<int64_t>(tv.tv_sec) * 1000000 + tv.tv_usec;
#elif defined(__mips__)
// mips apparently only allows rdtsc for superusers, so we fall
// back to gettimeofday. It's possible clock_gettime would be better.
struct timeval tv;
gettimeofday(&tv, nullptr);
return static_cast<int64_t>(tv.tv_sec) * 1000000 + tv.tv_usec;
#elif defined(__s390__) // Covers both s390 and s390x.
// Return the CPU clock.
uint64_t tsc;
asm("stck %0" : "=Q" (tsc) : : "cc");
return tsc;
#else
// The soft failover to a generic implementation is automatic only for ARM.
// For other platforms the developer is expected to make an attempt to create
// a fast implementation and use generic version if nothing better is available.
#error You need to define CycleTimer for your OS and CPU
#endif
}
} // end namespace cycleclock
} // end namespace benchmark
#endif // BENCHMARK_CYCLECLOCK_H_

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#ifndef BENCHMARK_INTERNAL_MACROS_H_
#define BENCHMARK_INTERNAL_MACROS_H_
#include "benchmark/benchmark.h"
#ifndef __has_feature
#define __has_feature(x) 0
#endif
#ifndef __has_builtin
#define __has_builtin(x) 0
#endif
#if defined(__clang__)
#if !defined(COMPILER_CLANG)
#define COMPILER_CLANG
#endif
#elif defined(_MSC_VER)
#if !defined(COMPILER_MSVC)
#define COMPILER_MSVC
#endif
#elif defined(__GNUC__)
#if !defined(COMPILER_GCC)
#define COMPILER_GCC
#endif
#endif
#if __has_feature(cxx_attributes)
#define BENCHMARK_NORETURN [[noreturn]]
#elif defined(__GNUC__)
#define BENCHMARK_NORETURN __attribute__((noreturn))
#elif defined(COMPILER_MSVC)
#define BENCHMARK_NORETURN __declspec(noreturn)
#else
#define BENCHMARK_NORETURN
#endif
#if defined(__CYGWIN__)
#define BENCHMARK_OS_CYGWIN 1
#elif defined(_WIN32)
#define BENCHMARK_OS_WINDOWS 1
#elif defined(__APPLE__)
#define BENCHMARK_OS_APPLE 1
#include "TargetConditionals.h"
#if defined(TARGET_OS_MAC)
#define BENCHMARK_OS_MACOSX 1
#if defined(TARGET_OS_IPHONE)
#define BENCHMARK_OS_IOS 1
#endif
#endif
#elif defined(__FreeBSD__)
#define BENCHMARK_OS_FREEBSD 1
#elif defined(__NetBSD__)
#define BENCHMARK_OS_NETBSD 1
#elif defined(__OpenBSD__)
#define BENCHMARK_OS_OPENBSD 1
#elif defined(__linux__)
#define BENCHMARK_OS_LINUX 1
#elif defined(__native_client__)
#define BENCHMARK_OS_NACL 1
#elif defined(__EMSCRIPTEN__)
#define BENCHMARK_OS_EMSCRIPTEN 1
#elif defined(__rtems__)
#define BENCHMARK_OS_RTEMS 1
#elif defined(__Fuchsia__)
#define BENCHMARK_OS_FUCHSIA 1
#elif defined (__SVR4) && defined (__sun)
#define BENCHMARK_OS_SOLARIS 1
#endif
#if !__has_feature(cxx_exceptions) && !defined(__cpp_exceptions) \
&& !defined(__EXCEPTIONS)
#define BENCHMARK_HAS_NO_EXCEPTIONS
#endif
#if defined(COMPILER_CLANG) || defined(COMPILER_GCC)
#define BENCHMARK_MAYBE_UNUSED __attribute__((unused))
#else
#define BENCHMARK_MAYBE_UNUSED
#endif
#if defined(COMPILER_GCC) || __has_builtin(__builtin_unreachable)
#define BENCHMARK_UNREACHABLE() __builtin_unreachable()
#elif defined(COMPILER_MSVC)
#define BENCHMARK_UNREACHABLE() __assume(false)
#else
#define BENCHMARK_UNREACHABLE() ((void)0)
#endif
#endif // BENCHMARK_INTERNAL_MACROS_H_

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// Copyright 2015 Google Inc. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "benchmark/benchmark.h"
#include "complexity.h"
#include <algorithm>
#include <cstdint>
#include <iostream>
#include <string>
#include <tuple>
#include <vector>
#include <iomanip> // for setprecision
#include <limits>
#include "string_util.h"
#include "timers.h"
namespace benchmark {
namespace {
std::string FormatKV(std::string const& key, std::string const& value) {
return StrFormat("\"%s\": \"%s\"", key.c_str(), value.c_str());
}
std::string FormatKV(std::string const& key, const char* value) {
return StrFormat("\"%s\": \"%s\"", key.c_str(), value);
}
std::string FormatKV(std::string const& key, bool value) {
return StrFormat("\"%s\": %s", key.c_str(), value ? "true" : "false");
}
std::string FormatKV(std::string const& key, int64_t value) {
std::stringstream ss;
ss << '"' << key << "\": " << value;
return ss.str();
}
std::string FormatKV(std::string const& key, double value) {
std::stringstream ss;
ss << '"' << key << "\": ";
const auto max_digits10 = std::numeric_limits<decltype (value)>::max_digits10;
const auto max_fractional_digits10 = max_digits10 - 1;
ss << std::scientific << std::setprecision(max_fractional_digits10) << value;
return ss.str();
}
int64_t RoundDouble(double v) { return static_cast<int64_t>(v + 0.5); }
} // end namespace
bool JSONReporter::ReportContext(const Context& context) {
std::ostream& out = GetOutputStream();
out << "{\n";
std::string inner_indent(2, ' ');
// Open context block and print context information.
out << inner_indent << "\"context\": {\n";
std::string indent(4, ' ');
std::string walltime_value = LocalDateTimeString();
out << indent << FormatKV("date", walltime_value) << ",\n";
if (Context::executable_name) {
out << indent << FormatKV("executable", Context::executable_name) << ",\n";
}
CPUInfo const& info = context.cpu_info;
out << indent << FormatKV("num_cpus", static_cast<int64_t>(info.num_cpus))
<< ",\n";
out << indent
<< FormatKV("mhz_per_cpu",
RoundDouble(info.cycles_per_second / 1000000.0))
<< ",\n";
out << indent << FormatKV("cpu_scaling_enabled", info.scaling_enabled)
<< ",\n";
out << indent << "\"caches\": [\n";
indent = std::string(6, ' ');
std::string cache_indent(8, ' ');
for (size_t i = 0; i < info.caches.size(); ++i) {
auto& CI = info.caches[i];
out << indent << "{\n";
out << cache_indent << FormatKV("type", CI.type) << ",\n";
out << cache_indent << FormatKV("level", static_cast<int64_t>(CI.level))
<< ",\n";
out << cache_indent
<< FormatKV("size", static_cast<int64_t>(CI.size) * 1000u) << ",\n";
out << cache_indent
<< FormatKV("num_sharing", static_cast<int64_t>(CI.num_sharing))
<< "\n";
out << indent << "}";
if (i != info.caches.size() - 1) out << ",";
out << "\n";
}
indent = std::string(4, ' ');
out << indent << "],\n";
#if defined(NDEBUG)
const char build_type[] = "release";
#else
const char build_type[] = "debug";
#endif
out << indent << FormatKV("library_build_type", build_type) << "\n";
// Close context block and open the list of benchmarks.
out << inner_indent << "},\n";
out << inner_indent << "\"benchmarks\": [\n";
return true;
}
void JSONReporter::ReportRuns(std::vector<Run> const& reports) {
if (reports.empty()) {
return;
}
std::string indent(4, ' ');
std::ostream& out = GetOutputStream();
if (!first_report_) {
out << ",\n";
}
first_report_ = false;
for (auto it = reports.begin(); it != reports.end(); ++it) {
out << indent << "{\n";
PrintRunData(*it);
out << indent << '}';
auto it_cp = it;
if (++it_cp != reports.end()) {
out << ",\n";
}
}
}
void JSONReporter::Finalize() {
// Close the list of benchmarks and the top level object.
GetOutputStream() << "\n ]\n}\n";
}
void JSONReporter::PrintRunData(Run const& run) {
std::string indent(6, ' ');
std::ostream& out = GetOutputStream();
out << indent << FormatKV("name", run.benchmark_name) << ",\n";
if (run.error_occurred) {
out << indent << FormatKV("error_occurred", run.error_occurred) << ",\n";
out << indent << FormatKV("error_message", run.error_message) << ",\n";
}
if (!run.report_big_o && !run.report_rms) {
out << indent << FormatKV("iterations", run.iterations) << ",\n";
out << indent
<< FormatKV("real_time", run.GetAdjustedRealTime())
<< ",\n";
out << indent
<< FormatKV("cpu_time", run.GetAdjustedCPUTime());
out << ",\n"
<< indent << FormatKV("time_unit", GetTimeUnitString(run.time_unit));
} else if (run.report_big_o) {
out << indent
<< FormatKV("cpu_coefficient", run.GetAdjustedCPUTime())
<< ",\n";
out << indent
<< FormatKV("real_coefficient", run.GetAdjustedRealTime())
<< ",\n";
out << indent << FormatKV("big_o", GetBigOString(run.complexity)) << ",\n";
out << indent << FormatKV("time_unit", GetTimeUnitString(run.time_unit));
} else if (run.report_rms) {
out << indent
<< FormatKV("rms", run.GetAdjustedCPUTime());
}
if (run.bytes_per_second > 0.0) {
out << ",\n"
<< indent
<< FormatKV("bytes_per_second", run.bytes_per_second);
}
if (run.items_per_second > 0.0) {
out << ",\n"
<< indent
<< FormatKV("items_per_second", run.items_per_second);
}
for(auto &c : run.counters) {
out << ",\n"
<< indent
<< FormatKV(c.first, c.second);
}
if (!run.report_label.empty()) {
out << ",\n" << indent << FormatKV("label", run.report_label);
}
out << '\n';
}
} // end namespace benchmark

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#ifndef BENCHMARK_LOG_H_
#define BENCHMARK_LOG_H_
#include <iostream>
#include <ostream>
#include "benchmark/benchmark.h"
namespace benchmark {
namespace internal {
typedef std::basic_ostream<char>&(EndLType)(std::basic_ostream<char>&);
class LogType {
friend LogType& GetNullLogInstance();
friend LogType& GetErrorLogInstance();
// FIXME: Add locking to output.
template <class Tp>
friend LogType& operator<<(LogType&, Tp const&);
friend LogType& operator<<(LogType&, EndLType*);
private:
LogType(std::ostream* out) : out_(out) {}
std::ostream* out_;
BENCHMARK_DISALLOW_COPY_AND_ASSIGN(LogType);
};
template <class Tp>
LogType& operator<<(LogType& log, Tp const& value) {
if (log.out_) {
*log.out_ << value;
}
return log;
}
inline LogType& operator<<(LogType& log, EndLType* m) {
if (log.out_) {
*log.out_ << m;
}
return log;
}
inline int& LogLevel() {
static int log_level = 0;
return log_level;
}
inline LogType& GetNullLogInstance() {
static LogType log(nullptr);
return log;
}
inline LogType& GetErrorLogInstance() {
static LogType log(&std::clog);
return log;
}
inline LogType& GetLogInstanceForLevel(int level) {
if (level <= LogLevel()) {
return GetErrorLogInstance();
}
return GetNullLogInstance();
}
} // end namespace internal
} // end namespace benchmark
#define VLOG(x) \
(::benchmark::internal::GetLogInstanceForLevel(x) << "-- LOG(" << x << "):" \
" ")
#endif

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#ifndef BENCHMARK_MUTEX_H_
#define BENCHMARK_MUTEX_H_
#include <condition_variable>
#include <mutex>
#include "check.h"
// Enable thread safety attributes only with clang.
// The attributes can be safely erased when compiling with other compilers.
#if defined(HAVE_THREAD_SAFETY_ATTRIBUTES)
#define THREAD_ANNOTATION_ATTRIBUTE__(x) __attribute__((x))
#else
#define THREAD_ANNOTATION_ATTRIBUTE__(x) // no-op
#endif
#define CAPABILITY(x) THREAD_ANNOTATION_ATTRIBUTE__(capability(x))
#define SCOPED_CAPABILITY THREAD_ANNOTATION_ATTRIBUTE__(scoped_lockable)
#define GUARDED_BY(x) THREAD_ANNOTATION_ATTRIBUTE__(guarded_by(x))
#define PT_GUARDED_BY(x) THREAD_ANNOTATION_ATTRIBUTE__(pt_guarded_by(x))
#define ACQUIRED_BEFORE(...) \
THREAD_ANNOTATION_ATTRIBUTE__(acquired_before(__VA_ARGS__))
#define ACQUIRED_AFTER(...) \
THREAD_ANNOTATION_ATTRIBUTE__(acquired_after(__VA_ARGS__))
#define REQUIRES(...) \
THREAD_ANNOTATION_ATTRIBUTE__(requires_capability(__VA_ARGS__))
#define REQUIRES_SHARED(...) \
THREAD_ANNOTATION_ATTRIBUTE__(requires_shared_capability(__VA_ARGS__))
#define ACQUIRE(...) \
THREAD_ANNOTATION_ATTRIBUTE__(acquire_capability(__VA_ARGS__))
#define ACQUIRE_SHARED(...) \
THREAD_ANNOTATION_ATTRIBUTE__(acquire_shared_capability(__VA_ARGS__))
#define RELEASE(...) \
THREAD_ANNOTATION_ATTRIBUTE__(release_capability(__VA_ARGS__))
#define RELEASE_SHARED(...) \
THREAD_ANNOTATION_ATTRIBUTE__(release_shared_capability(__VA_ARGS__))
#define TRY_ACQUIRE(...) \
THREAD_ANNOTATION_ATTRIBUTE__(try_acquire_capability(__VA_ARGS__))
#define TRY_ACQUIRE_SHARED(...) \
THREAD_ANNOTATION_ATTRIBUTE__(try_acquire_shared_capability(__VA_ARGS__))
#define EXCLUDES(...) THREAD_ANNOTATION_ATTRIBUTE__(locks_excluded(__VA_ARGS__))
#define ASSERT_CAPABILITY(x) THREAD_ANNOTATION_ATTRIBUTE__(assert_capability(x))
#define ASSERT_SHARED_CAPABILITY(x) \
THREAD_ANNOTATION_ATTRIBUTE__(assert_shared_capability(x))
#define RETURN_CAPABILITY(x) THREAD_ANNOTATION_ATTRIBUTE__(lock_returned(x))
#define NO_THREAD_SAFETY_ANALYSIS \
THREAD_ANNOTATION_ATTRIBUTE__(no_thread_safety_analysis)
namespace benchmark {
typedef std::condition_variable Condition;
// NOTE: Wrappers for std::mutex and std::unique_lock are provided so that
// we can annotate them with thread safety attributes and use the
// -Wthread-safety warning with clang. The standard library types cannot be
// used directly because they do not provided the required annotations.
class CAPABILITY("mutex") Mutex {
public:
Mutex() {}
void lock() ACQUIRE() { mut_.lock(); }
void unlock() RELEASE() { mut_.unlock(); }
std::mutex& native_handle() { return mut_; }
private:
std::mutex mut_;
};
class SCOPED_CAPABILITY MutexLock {
typedef std::unique_lock<std::mutex> MutexLockImp;
public:
MutexLock(Mutex& m) ACQUIRE(m) : ml_(m.native_handle()) {}
~MutexLock() RELEASE() {}
MutexLockImp& native_handle() { return ml_; }
private:
MutexLockImp ml_;
};
class Barrier {
public:
Barrier(int num_threads) : running_threads_(num_threads) {}
// Called by each thread
bool wait() EXCLUDES(lock_) {
bool last_thread = false;
{
MutexLock ml(lock_);
last_thread = createBarrier(ml);
}
if (last_thread) phase_condition_.notify_all();
return last_thread;
}
void removeThread() EXCLUDES(lock_) {
MutexLock ml(lock_);
--running_threads_;
if (entered_ != 0) phase_condition_.notify_all();
}
private:
Mutex lock_;
Condition phase_condition_;
int running_threads_;
// State for barrier management
int phase_number_ = 0;
int entered_ = 0; // Number of threads that have entered this barrier
// Enter the barrier and wait until all other threads have also
// entered the barrier. Returns iff this is the last thread to
// enter the barrier.
bool createBarrier(MutexLock& ml) REQUIRES(lock_) {
CHECK_LT(entered_, running_threads_);
entered_++;
if (entered_ < running_threads_) {
// Wait for all threads to enter
int phase_number_cp = phase_number_;
auto cb = [this, phase_number_cp]() {
return this->phase_number_ > phase_number_cp ||
entered_ == running_threads_; // A thread has aborted in error
};
phase_condition_.wait(ml.native_handle(), cb);
if (phase_number_ > phase_number_cp) return false;
// else (running_threads_ == entered_) and we are the last thread.
}
// Last thread has reached the barrier
phase_number_++;
entered_ = 0;
return true;
}
};
} // end namespace benchmark
#endif // BENCHMARK_MUTEX_H_

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// Copyright 2015 Google Inc. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef BENCHMARK_RE_H_
#define BENCHMARK_RE_H_
#include "internal_macros.h"
#if !defined(HAVE_STD_REGEX) && \
!defined(HAVE_GNU_POSIX_REGEX) && \
!defined(HAVE_POSIX_REGEX)
// No explicit regex selection; detect based on builtin hints.
#if defined(BENCHMARK_OS_LINUX) || defined(BENCHMARK_OS_APPLE)
#define HAVE_POSIX_REGEX 1
#elif __cplusplus >= 199711L
#define HAVE_STD_REGEX 1
#endif
#endif
// Prefer C regex libraries when compiling w/o exceptions so that we can
// correctly report errors.
#if defined(BENCHMARK_HAS_NO_EXCEPTIONS) && \
defined(BENCHMARK_HAVE_STD_REGEX) && \
(defined(HAVE_GNU_POSIX_REGEX) || defined(HAVE_POSIX_REGEX))
#undef HAVE_STD_REGEX
#endif
#if defined(HAVE_STD_REGEX)
#include <regex>
#elif defined(HAVE_GNU_POSIX_REGEX)
#include <gnuregex.h>
#elif defined(HAVE_POSIX_REGEX)
#include <regex.h>
#else
#error No regular expression backend was found!
#endif
#include <string>
#include "check.h"
namespace benchmark {
// A wrapper around the POSIX regular expression API that provides automatic
// cleanup
class Regex {
public:
Regex() : init_(false) {}
~Regex();
// Compile a regular expression matcher from spec. Returns true on success.
//
// On failure (and if error is not nullptr), error is populated with a human
// readable error message if an error occurs.
bool Init(const std::string& spec, std::string* error);
// Returns whether str matches the compiled regular expression.
bool Match(const std::string& str);
private:
bool init_;
// Underlying regular expression object
#if defined(HAVE_STD_REGEX)
std::regex re_;
#elif defined(HAVE_POSIX_REGEX) || defined(HAVE_GNU_POSIX_REGEX)
regex_t re_;
#else
#error No regular expression backend implementation available
#endif
};
#if defined(HAVE_STD_REGEX)
inline bool Regex::Init(const std::string& spec, std::string* error) {
#ifdef BENCHMARK_HAS_NO_EXCEPTIONS
((void)error); // suppress unused warning
#else
try {
#endif
re_ = std::regex(spec, std::regex_constants::extended);
init_ = true;
#ifndef BENCHMARK_HAS_NO_EXCEPTIONS
} catch (const std::regex_error& e) {
if (error) {
*error = e.what();
}
}
#endif
return init_;
}
inline Regex::~Regex() {}
inline bool Regex::Match(const std::string& str) {
if (!init_) {
return false;
}
return std::regex_search(str, re_);
}
#else
inline bool Regex::Init(const std::string& spec, std::string* error) {
int ec = regcomp(&re_, spec.c_str(), REG_EXTENDED | REG_NOSUB);
if (ec != 0) {
if (error) {
size_t needed = regerror(ec, &re_, nullptr, 0);
char* errbuf = new char[needed];
regerror(ec, &re_, errbuf, needed);
// regerror returns the number of bytes necessary to null terminate
// the string, so we move that when assigning to error.
CHECK_NE(needed, 0);
error->assign(errbuf, needed - 1);
delete[] errbuf;
}
return false;
}
init_ = true;
return true;
}
inline Regex::~Regex() {
if (init_) {
regfree(&re_);
}
}
inline bool Regex::Match(const std::string& str) {
if (!init_) {
return false;
}
return regexec(&re_, str.c_str(), 0, nullptr, 0) == 0;
}
#endif
} // end namespace benchmark
#endif // BENCHMARK_RE_H_

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// Copyright 2015 Google Inc. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "benchmark/benchmark.h"
#include "timers.h"
#include <cstdlib>
#include <iostream>
#include <tuple>
#include <vector>
#include "check.h"
namespace benchmark {
BenchmarkReporter::BenchmarkReporter()
: output_stream_(&std::cout), error_stream_(&std::cerr) {}
BenchmarkReporter::~BenchmarkReporter() {}
void BenchmarkReporter::PrintBasicContext(std::ostream *out,
Context const &context) {
CHECK(out) << "cannot be null";
auto &Out = *out;
Out << LocalDateTimeString() << "\n";
if (context.executable_name)
Out << "Running " << context.executable_name << "\n";
const CPUInfo &info = context.cpu_info;
Out << "Run on (" << info.num_cpus << " X "
<< (info.cycles_per_second / 1000000.0) << " MHz CPU "
<< ((info.num_cpus > 1) ? "s" : "") << ")\n";
if (info.caches.size() != 0) {
Out << "CPU Caches:\n";
for (auto &CInfo : info.caches) {
Out << " L" << CInfo.level << " " << CInfo.type << " "
<< (CInfo.size / 1000) << "K";
if (CInfo.num_sharing != 0)
Out << " (x" << (info.num_cpus / CInfo.num_sharing) << ")";
Out << "\n";
}
}
if (info.scaling_enabled) {
Out << "***WARNING*** CPU scaling is enabled, the benchmark "
"real time measurements may be noisy and will incur extra "
"overhead.\n";
}
#ifndef NDEBUG
Out << "***WARNING*** Library was built as DEBUG. Timings may be "
"affected.\n";
#endif
}
// No initializer because it's already initialized to NULL.
const char* BenchmarkReporter::Context::executable_name;
BenchmarkReporter::Context::Context() : cpu_info(CPUInfo::Get()) {}
double BenchmarkReporter::Run::GetAdjustedRealTime() const {
double new_time = real_accumulated_time * GetTimeUnitMultiplier(time_unit);
if (iterations != 0) new_time /= static_cast<double>(iterations);
return new_time;
}
double BenchmarkReporter::Run::GetAdjustedCPUTime() const {
double new_time = cpu_accumulated_time * GetTimeUnitMultiplier(time_unit);
if (iterations != 0) new_time /= static_cast<double>(iterations);
return new_time;
}
} // end namespace benchmark

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// Copyright 2015 Google Inc. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "sleep.h"
#include <cerrno>
#include <cstdlib>
#include <ctime>
#include "internal_macros.h"
#ifdef BENCHMARK_OS_WINDOWS
#include <Windows.h>
#endif
namespace benchmark {
#ifdef BENCHMARK_OS_WINDOWS
// Window's Sleep takes milliseconds argument.
void SleepForMilliseconds(int milliseconds) { Sleep(milliseconds); }
void SleepForSeconds(double seconds) {
SleepForMilliseconds(static_cast<int>(kNumMillisPerSecond * seconds));
}
#else // BENCHMARK_OS_WINDOWS
void SleepForMicroseconds(int microseconds) {
struct timespec sleep_time;
sleep_time.tv_sec = microseconds / kNumMicrosPerSecond;
sleep_time.tv_nsec = (microseconds % kNumMicrosPerSecond) * kNumNanosPerMicro;
while (nanosleep(&sleep_time, &sleep_time) != 0 && errno == EINTR)
; // Ignore signals and wait for the full interval to elapse.
}
void SleepForMilliseconds(int milliseconds) {
SleepForMicroseconds(milliseconds * kNumMicrosPerMilli);
}
void SleepForSeconds(double seconds) {
SleepForMicroseconds(static_cast<int>(seconds * kNumMicrosPerSecond));
}
#endif // BENCHMARK_OS_WINDOWS
} // end namespace benchmark

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#ifndef BENCHMARK_SLEEP_H_
#define BENCHMARK_SLEEP_H_
namespace benchmark {
const int kNumMillisPerSecond = 1000;
const int kNumMicrosPerMilli = 1000;
const int kNumMicrosPerSecond = kNumMillisPerSecond * 1000;
const int kNumNanosPerMicro = 1000;
const int kNumNanosPerSecond = kNumNanosPerMicro * kNumMicrosPerSecond;
void SleepForMilliseconds(int milliseconds);
void SleepForSeconds(double seconds);
} // end namespace benchmark
#endif // BENCHMARK_SLEEP_H_

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// Copyright 2016 Ismael Jimenez Martinez. All rights reserved.
// Copyright 2017 Roman Lebedev. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "benchmark/benchmark.h"
#include <algorithm>
#include <cmath>
#include <string>
#include <vector>
#include <numeric>
#include "check.h"
#include "statistics.h"
namespace benchmark {
auto StatisticsSum = [](const std::vector<double>& v) {
return std::accumulate(v.begin(), v.end(), 0.0);
};
double StatisticsMean(const std::vector<double>& v) {
if (v.empty()) return 0.0;
return StatisticsSum(v) * (1.0 / v.size());
}
double StatisticsMedian(const std::vector<double>& v) {
if (v.size() < 3) return StatisticsMean(v);
std::vector<double> copy(v);
auto center = copy.begin() + v.size() / 2;
std::nth_element(copy.begin(), center, copy.end());
// did we have an odd number of samples?
// if yes, then center is the median
// it no, then we are looking for the average between center and the value before
if(v.size() % 2 == 1)
return *center;
auto center2 = copy.begin() + v.size() / 2 - 1;
std::nth_element(copy.begin(), center2, copy.end());
return (*center + *center2) / 2.0;
}
// Return the sum of the squares of this sample set
auto SumSquares = [](const std::vector<double>& v) {
return std::inner_product(v.begin(), v.end(), v.begin(), 0.0);
};
auto Sqr = [](const double dat) { return dat * dat; };
auto Sqrt = [](const double dat) {
// Avoid NaN due to imprecision in the calculations
if (dat < 0.0) return 0.0;
return std::sqrt(dat);
};
double StatisticsStdDev(const std::vector<double>& v) {
const auto mean = StatisticsMean(v);
if (v.empty()) return mean;
// Sample standard deviation is undefined for n = 1
if (v.size() == 1)
return 0.0;
const double avg_squares = SumSquares(v) * (1.0 / v.size());
return Sqrt(v.size() / (v.size() - 1.0) * (avg_squares - Sqr(mean)));
}
std::vector<BenchmarkReporter::Run> ComputeStats(
const std::vector<BenchmarkReporter::Run>& reports) {
typedef BenchmarkReporter::Run Run;
std::vector<Run> results;
auto error_count =
std::count_if(reports.begin(), reports.end(),
[](Run const& run) { return run.error_occurred; });
if (reports.size() - error_count < 2) {
// We don't report aggregated data if there was a single run.
return results;
}
// Accumulators.
std::vector<double> real_accumulated_time_stat;
std::vector<double> cpu_accumulated_time_stat;
std::vector<double> bytes_per_second_stat;
std::vector<double> items_per_second_stat;
real_accumulated_time_stat.reserve(reports.size());
cpu_accumulated_time_stat.reserve(reports.size());
bytes_per_second_stat.reserve(reports.size());
items_per_second_stat.reserve(reports.size());
// All repetitions should be run with the same number of iterations so we
// can take this information from the first benchmark.
int64_t const run_iterations = reports.front().iterations;
// create stats for user counters
struct CounterStat {
Counter c;
std::vector<double> s;
};
std::map< std::string, CounterStat > counter_stats;
for(Run const& r : reports) {
for(auto const& cnt : r.counters) {
auto it = counter_stats.find(cnt.first);
if(it == counter_stats.end()) {
counter_stats.insert({cnt.first, {cnt.second, std::vector<double>{}}});
it = counter_stats.find(cnt.first);
it->second.s.reserve(reports.size());
} else {
CHECK_EQ(counter_stats[cnt.first].c.flags, cnt.second.flags);
}
}
}
// Populate the accumulators.
for (Run const& run : reports) {
CHECK_EQ(reports[0].benchmark_name, run.benchmark_name);
CHECK_EQ(run_iterations, run.iterations);
if (run.error_occurred) continue;
real_accumulated_time_stat.emplace_back(run.real_accumulated_time);
cpu_accumulated_time_stat.emplace_back(run.cpu_accumulated_time);
items_per_second_stat.emplace_back(run.items_per_second);
bytes_per_second_stat.emplace_back(run.bytes_per_second);
// user counters
for(auto const& cnt : run.counters) {
auto it = counter_stats.find(cnt.first);
CHECK_NE(it, counter_stats.end());
it->second.s.emplace_back(cnt.second);
}
}
// Only add label if it is same for all runs
std::string report_label = reports[0].report_label;
for (std::size_t i = 1; i < reports.size(); i++) {
if (reports[i].report_label != report_label) {
report_label = "";
break;
}
}
for(const auto& Stat : *reports[0].statistics) {
// Get the data from the accumulator to BenchmarkReporter::Run's.
Run data;
data.benchmark_name = reports[0].benchmark_name + "_" + Stat.name_;
data.report_label = report_label;
data.iterations = run_iterations;
data.real_accumulated_time = Stat.compute_(real_accumulated_time_stat);
data.cpu_accumulated_time = Stat.compute_(cpu_accumulated_time_stat);
data.bytes_per_second = Stat.compute_(bytes_per_second_stat);
data.items_per_second = Stat.compute_(items_per_second_stat);
data.time_unit = reports[0].time_unit;
// user counters
for(auto const& kv : counter_stats) {
const auto uc_stat = Stat.compute_(kv.second.s);
auto c = Counter(uc_stat, counter_stats[kv.first].c.flags);
data.counters[kv.first] = c;
}
results.push_back(data);
}
return results;
}
} // end namespace benchmark

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// Copyright 2016 Ismael Jimenez Martinez. All rights reserved.
// Copyright 2017 Roman Lebedev. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef STATISTICS_H_
#define STATISTICS_H_
#include <vector>
#include "benchmark/benchmark.h"
namespace benchmark {
// Return a vector containing the mean, median and standard devation information
// (and any user-specified info) for the specified list of reports. If 'reports'
// contains less than two non-errored runs an empty vector is returned
std::vector<BenchmarkReporter::Run> ComputeStats(
const std::vector<BenchmarkReporter::Run>& reports);
double StatisticsMean(const std::vector<double>& v);
double StatisticsMedian(const std::vector<double>& v);
double StatisticsStdDev(const std::vector<double>& v);
} // end namespace benchmark
#endif // STATISTICS_H_

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#include "string_util.h"
#include <array>
#include <cmath>
#include <cstdarg>
#include <cstdio>
#include <memory>
#include <sstream>
#include "arraysize.h"
namespace benchmark {
namespace {
// kilo, Mega, Giga, Tera, Peta, Exa, Zetta, Yotta.
const char kBigSIUnits[] = "kMGTPEZY";
// Kibi, Mebi, Gibi, Tebi, Pebi, Exbi, Zebi, Yobi.
const char kBigIECUnits[] = "KMGTPEZY";
// milli, micro, nano, pico, femto, atto, zepto, yocto.
const char kSmallSIUnits[] = "munpfazy";
// We require that all three arrays have the same size.
static_assert(arraysize(kBigSIUnits) == arraysize(kBigIECUnits),
"SI and IEC unit arrays must be the same size");
static_assert(arraysize(kSmallSIUnits) == arraysize(kBigSIUnits),
"Small SI and Big SI unit arrays must be the same size");
static const int64_t kUnitsSize = arraysize(kBigSIUnits);
void ToExponentAndMantissa(double val, double thresh, int precision,
double one_k, std::string* mantissa,
int64_t* exponent) {
std::stringstream mantissa_stream;
if (val < 0) {
mantissa_stream << "-";
val = -val;
}
// Adjust threshold so that it never excludes things which can't be rendered
// in 'precision' digits.
const double adjusted_threshold =
std::max(thresh, 1.0 / std::pow(10.0, precision));
const double big_threshold = adjusted_threshold * one_k;
const double small_threshold = adjusted_threshold;
// Values in ]simple_threshold,small_threshold[ will be printed as-is
const double simple_threshold = 0.01;
if (val > big_threshold) {
// Positive powers
double scaled = val;
for (size_t i = 0; i < arraysize(kBigSIUnits); ++i) {
scaled /= one_k;
if (scaled <= big_threshold) {
mantissa_stream << scaled;
*exponent = i + 1;
*mantissa = mantissa_stream.str();
return;
}
}
mantissa_stream << val;
*exponent = 0;
} else if (val < small_threshold) {
// Negative powers
if (val < simple_threshold) {
double scaled = val;
for (size_t i = 0; i < arraysize(kSmallSIUnits); ++i) {
scaled *= one_k;
if (scaled >= small_threshold) {
mantissa_stream << scaled;
*exponent = -static_cast<int64_t>(i + 1);
*mantissa = mantissa_stream.str();
return;
}
}
}
mantissa_stream << val;
*exponent = 0;
} else {
mantissa_stream << val;
*exponent = 0;
}
*mantissa = mantissa_stream.str();
}
std::string ExponentToPrefix(int64_t exponent, bool iec) {
if (exponent == 0) return "";
const int64_t index = (exponent > 0 ? exponent - 1 : -exponent - 1);
if (index >= kUnitsSize) return "";
const char* array =
(exponent > 0 ? (iec ? kBigIECUnits : kBigSIUnits) : kSmallSIUnits);
if (iec)
return array[index] + std::string("i");
else
return std::string(1, array[index]);
}
std::string ToBinaryStringFullySpecified(double value, double threshold,
int precision, double one_k = 1024.0) {
std::string mantissa;
int64_t exponent;
ToExponentAndMantissa(value, threshold, precision, one_k, &mantissa,
&exponent);
return mantissa + ExponentToPrefix(exponent, false);
}
} // end namespace
void AppendHumanReadable(int n, std::string* str) {
std::stringstream ss;
// Round down to the nearest SI prefix.
ss << ToBinaryStringFullySpecified(n, 1.0, 0);
*str += ss.str();
}
std::string HumanReadableNumber(double n, double one_k) {
// 1.1 means that figures up to 1.1k should be shown with the next unit down;
// this softens edge effects.
// 1 means that we should show one decimal place of precision.
return ToBinaryStringFullySpecified(n, 1.1, 1, one_k);
}
std::string StrFormatImp(const char* msg, va_list args) {
// we might need a second shot at this, so pre-emptivly make a copy
va_list args_cp;
va_copy(args_cp, args);
// TODO(ericwf): use std::array for first attempt to avoid one memory
// allocation guess what the size might be
std::array<char, 256> local_buff;
std::size_t size = local_buff.size();
// 2015-10-08: vsnprintf is used instead of snd::vsnprintf due to a limitation
// in the android-ndk
auto ret = vsnprintf(local_buff.data(), size, msg, args_cp);
va_end(args_cp);
// handle empty expansion
if (ret == 0) return std::string{};
if (static_cast<std::size_t>(ret) < size)
return std::string(local_buff.data());
// we did not provide a long enough buffer on our first attempt.
// add 1 to size to account for null-byte in size cast to prevent overflow
size = static_cast<std::size_t>(ret) + 1;
auto buff_ptr = std::unique_ptr<char[]>(new char[size]);
// 2015-10-08: vsnprintf is used instead of snd::vsnprintf due to a limitation
// in the android-ndk
ret = vsnprintf(buff_ptr.get(), size, msg, args);
return std::string(buff_ptr.get());
}
std::string StrFormat(const char* format, ...) {
va_list args;
va_start(args, format);
std::string tmp = StrFormatImp(format, args);
va_end(args);
return tmp;
}
void ReplaceAll(std::string* str, const std::string& from,
const std::string& to) {
std::size_t start = 0;
while ((start = str->find(from, start)) != std::string::npos) {
str->replace(start, from.length(), to);
start += to.length();
}
}
} // end namespace benchmark

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#ifndef BENCHMARK_STRING_UTIL_H_
#define BENCHMARK_STRING_UTIL_H_
#include <sstream>
#include <string>
#include <utility>
#include "internal_macros.h"
namespace benchmark {
void AppendHumanReadable(int n, std::string* str);
std::string HumanReadableNumber(double n, double one_k = 1024.0);
std::string StrFormat(const char* format, ...);
inline std::ostream& StrCatImp(std::ostream& out) BENCHMARK_NOEXCEPT {
return out;
}
template <class First, class... Rest>
inline std::ostream& StrCatImp(std::ostream& out, First&& f,
Rest&&... rest) {
out << std::forward<First>(f);
return StrCatImp(out, std::forward<Rest>(rest)...);
}
template <class... Args>
inline std::string StrCat(Args&&... args) {
std::ostringstream ss;
StrCatImp(ss, std::forward<Args>(args)...);
return ss.str();
}
void ReplaceAll(std::string* str, const std::string& from,
const std::string& to);
} // end namespace benchmark
#endif // BENCHMARK_STRING_UTIL_H_

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// Copyright 2015 Google Inc. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "internal_macros.h"
#ifdef BENCHMARK_OS_WINDOWS
#include <Shlwapi.h>
#undef StrCat // Don't let StrCat in string_util.h be renamed to lstrcatA
#include <VersionHelpers.h>
#include <Windows.h>
#else
#include <fcntl.h>
#ifndef BENCHMARK_OS_FUCHSIA
#include <sys/resource.h>
#endif
#include <sys/time.h>
#include <sys/types.h> // this header must be included before 'sys/sysctl.h' to avoid compilation error on FreeBSD
#include <unistd.h>
#if defined BENCHMARK_OS_FREEBSD || defined BENCHMARK_OS_MACOSX || \
defined BENCHMARK_OS_NETBSD || defined BENCHMARK_OS_OPENBSD
#define BENCHMARK_HAS_SYSCTL
#include <sys/sysctl.h>
#endif
#endif
#if defined(BENCHMARK_OS_SOLARIS)
#include <kstat.h>
#endif
#include <algorithm>
#include <array>
#include <bitset>
#include <cerrno>
#include <climits>
#include <cstdint>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <fstream>
#include <iostream>
#include <iterator>
#include <limits>
#include <memory>
#include <sstream>
#include "check.h"
#include "cycleclock.h"
#include "internal_macros.h"
#include "log.h"
#include "sleep.h"
#include "string_util.h"
namespace benchmark {
namespace {
void PrintImp(std::ostream& out) { out << std::endl; }
template <class First, class... Rest>
void PrintImp(std::ostream& out, First&& f, Rest&&... rest) {
out << std::forward<First>(f);
PrintImp(out, std::forward<Rest>(rest)...);
}
template <class... Args>
BENCHMARK_NORETURN void PrintErrorAndDie(Args&&... args) {
PrintImp(std::cerr, std::forward<Args>(args)...);
std::exit(EXIT_FAILURE);
}
#ifdef BENCHMARK_HAS_SYSCTL
/// ValueUnion - A type used to correctly alias the byte-for-byte output of
/// `sysctl` with the result type it's to be interpreted as.
struct ValueUnion {
union DataT {
uint32_t uint32_value;
uint64_t uint64_value;
// For correct aliasing of union members from bytes.
char bytes[8];
};
using DataPtr = std::unique_ptr<DataT, decltype(&std::free)>;
// The size of the data union member + its trailing array size.
size_t Size;
DataPtr Buff;
public:
ValueUnion() : Size(0), Buff(nullptr, &std::free) {}
explicit ValueUnion(size_t BuffSize)
: Size(sizeof(DataT) + BuffSize),
Buff(::new (std::malloc(Size)) DataT(), &std::free) {}
ValueUnion(ValueUnion&& other) = default;
explicit operator bool() const { return bool(Buff); }
char* data() const { return Buff->bytes; }
std::string GetAsString() const { return std::string(data()); }
int64_t GetAsInteger() const {
if (Size == sizeof(Buff->uint32_value))
return static_cast<int32_t>(Buff->uint32_value);
else if (Size == sizeof(Buff->uint64_value))
return static_cast<int64_t>(Buff->uint64_value);
BENCHMARK_UNREACHABLE();
}
uint64_t GetAsUnsigned() const {
if (Size == sizeof(Buff->uint32_value))
return Buff->uint32_value;
else if (Size == sizeof(Buff->uint64_value))
return Buff->uint64_value;
BENCHMARK_UNREACHABLE();
}
template <class T, int N>
std::array<T, N> GetAsArray() {
const int ArrSize = sizeof(T) * N;
CHECK_LE(ArrSize, Size);
std::array<T, N> Arr;
std::memcpy(Arr.data(), data(), ArrSize);
return Arr;
}
};
ValueUnion GetSysctlImp(std::string const& Name) {
#if defined BENCHMARK_OS_OPENBSD
int mib[2];
mib[0] = CTL_HW;
if ((Name == "hw.ncpu") || (Name == "hw.cpuspeed")){
ValueUnion buff(sizeof(int));
if (Name == "hw.ncpu") {
mib[1] = HW_NCPU;
} else {
mib[1] = HW_CPUSPEED;
}
if (sysctl(mib, 2, buff.data(), &buff.Size, nullptr, 0) == -1) {
return ValueUnion();
}
return buff;
}
return ValueUnion();
#else
size_t CurBuffSize = 0;
if (sysctlbyname(Name.c_str(), nullptr, &CurBuffSize, nullptr, 0) == -1)
return ValueUnion();
ValueUnion buff(CurBuffSize);
if (sysctlbyname(Name.c_str(), buff.data(), &buff.Size, nullptr, 0) == 0)
return buff;
return ValueUnion();
#endif
}
BENCHMARK_MAYBE_UNUSED
bool GetSysctl(std::string const& Name, std::string* Out) {
Out->clear();
auto Buff = GetSysctlImp(Name);
if (!Buff) return false;
Out->assign(Buff.data());
return true;
}
template <class Tp,
class = typename std::enable_if<std::is_integral<Tp>::value>::type>
bool GetSysctl(std::string const& Name, Tp* Out) {
*Out = 0;
auto Buff = GetSysctlImp(Name);
if (!Buff) return false;
*Out = static_cast<Tp>(Buff.GetAsUnsigned());
return true;
}
template <class Tp, size_t N>
bool GetSysctl(std::string const& Name, std::array<Tp, N>* Out) {
auto Buff = GetSysctlImp(Name);
if (!Buff) return false;
*Out = Buff.GetAsArray<Tp, N>();
return true;
}
#endif
template <class ArgT>
bool ReadFromFile(std::string const& fname, ArgT* arg) {
*arg = ArgT();
std::ifstream f(fname.c_str());
if (!f.is_open()) return false;
f >> *arg;
return f.good();
}
bool CpuScalingEnabled(int num_cpus) {
// We don't have a valid CPU count, so don't even bother.
if (num_cpus <= 0) return false;
#ifndef BENCHMARK_OS_WINDOWS
// On Linux, the CPUfreq subsystem exposes CPU information as files on the
// local file system. If reading the exported files fails, then we may not be
// running on Linux, so we silently ignore all the read errors.
std::string res;
for (int cpu = 0; cpu < num_cpus; ++cpu) {
std::string governor_file =
StrCat("/sys/devices/system/cpu/cpu", cpu, "/cpufreq/scaling_governor");
if (ReadFromFile(governor_file, &res) && res != "performance") return true;
}
#endif
return false;
}
int CountSetBitsInCPUMap(std::string Val) {
auto CountBits = [](std::string Part) {
using CPUMask = std::bitset<sizeof(std::uintptr_t) * CHAR_BIT>;
Part = "0x" + Part;
CPUMask Mask(std::stoul(Part, nullptr, 16));
return static_cast<int>(Mask.count());
};
size_t Pos;
int total = 0;
while ((Pos = Val.find(',')) != std::string::npos) {
total += CountBits(Val.substr(0, Pos));
Val = Val.substr(Pos + 1);
}
if (!Val.empty()) {
total += CountBits(Val);
}
return total;
}
BENCHMARK_MAYBE_UNUSED
std::vector<CPUInfo::CacheInfo> GetCacheSizesFromKVFS() {
std::vector<CPUInfo::CacheInfo> res;
std::string dir = "/sys/devices/system/cpu/cpu0/cache/";
int Idx = 0;
while (true) {
CPUInfo::CacheInfo info;
std::string FPath = StrCat(dir, "index", Idx++, "/");
std::ifstream f(StrCat(FPath, "size").c_str());
if (!f.is_open()) break;
std::string suffix;
f >> info.size;
if (f.fail())
PrintErrorAndDie("Failed while reading file '", FPath, "size'");
if (f.good()) {
f >> suffix;
if (f.bad())
PrintErrorAndDie(
"Invalid cache size format: failed to read size suffix");
else if (f && suffix != "K")
PrintErrorAndDie("Invalid cache size format: Expected bytes ", suffix);
else if (suffix == "K")
info.size *= 1000;
}
if (!ReadFromFile(StrCat(FPath, "type"), &info.type))
PrintErrorAndDie("Failed to read from file ", FPath, "type");
if (!ReadFromFile(StrCat(FPath, "level"), &info.level))
PrintErrorAndDie("Failed to read from file ", FPath, "level");
std::string map_str;
if (!ReadFromFile(StrCat(FPath, "shared_cpu_map"), &map_str))
PrintErrorAndDie("Failed to read from file ", FPath, "shared_cpu_map");
info.num_sharing = CountSetBitsInCPUMap(map_str);
res.push_back(info);
}
return res;
}
#ifdef BENCHMARK_OS_MACOSX
std::vector<CPUInfo::CacheInfo> GetCacheSizesMacOSX() {
std::vector<CPUInfo::CacheInfo> res;
std::array<uint64_t, 4> CacheCounts{{0, 0, 0, 0}};
GetSysctl("hw.cacheconfig", &CacheCounts);
struct {
std::string name;
std::string type;
int level;
size_t num_sharing;
} Cases[] = {{"hw.l1dcachesize", "Data", 1, CacheCounts[1]},
{"hw.l1icachesize", "Instruction", 1, CacheCounts[1]},
{"hw.l2cachesize", "Unified", 2, CacheCounts[2]},
{"hw.l3cachesize", "Unified", 3, CacheCounts[3]}};
for (auto& C : Cases) {
int val;
if (!GetSysctl(C.name, &val)) continue;
CPUInfo::CacheInfo info;
info.type = C.type;
info.level = C.level;
info.size = val;
info.num_sharing = static_cast<int>(C.num_sharing);
res.push_back(std::move(info));
}
return res;
}
#elif defined(BENCHMARK_OS_WINDOWS)
std::vector<CPUInfo::CacheInfo> GetCacheSizesWindows() {
std::vector<CPUInfo::CacheInfo> res;
DWORD buffer_size = 0;
using PInfo = SYSTEM_LOGICAL_PROCESSOR_INFORMATION;
using CInfo = CACHE_DESCRIPTOR;
using UPtr = std::unique_ptr<PInfo, decltype(&std::free)>;
GetLogicalProcessorInformation(nullptr, &buffer_size);
UPtr buff((PInfo*)malloc(buffer_size), &std::free);
if (!GetLogicalProcessorInformation(buff.get(), &buffer_size))
PrintErrorAndDie("Failed during call to GetLogicalProcessorInformation: ",
GetLastError());
PInfo* it = buff.get();
PInfo* end = buff.get() + (buffer_size / sizeof(PInfo));
for (; it != end; ++it) {
if (it->Relationship != RelationCache) continue;
using BitSet = std::bitset<sizeof(ULONG_PTR) * CHAR_BIT>;
BitSet B(it->ProcessorMask);
// To prevent duplicates, only consider caches where CPU 0 is specified
if (!B.test(0)) continue;
CInfo* Cache = &it->Cache;
CPUInfo::CacheInfo C;
C.num_sharing = static_cast<int>(B.count());
C.level = Cache->Level;
C.size = Cache->Size;
switch (Cache->Type) {
case CacheUnified:
C.type = "Unified";
break;
case CacheInstruction:
C.type = "Instruction";
break;
case CacheData:
C.type = "Data";
break;
case CacheTrace:
C.type = "Trace";
break;
default:
C.type = "Unknown";
break;
}
res.push_back(C);
}
return res;
}
#endif
std::vector<CPUInfo::CacheInfo> GetCacheSizes() {
#ifdef BENCHMARK_OS_MACOSX
return GetCacheSizesMacOSX();
#elif defined(BENCHMARK_OS_WINDOWS)
return GetCacheSizesWindows();
#else
return GetCacheSizesFromKVFS();
#endif
}
int GetNumCPUs() {
#ifdef BENCHMARK_HAS_SYSCTL
int NumCPU = -1;
if (GetSysctl("hw.ncpu", &NumCPU)) return NumCPU;
fprintf(stderr, "Err: %s\n", strerror(errno));
std::exit(EXIT_FAILURE);
#elif defined(BENCHMARK_OS_WINDOWS)
SYSTEM_INFO sysinfo;
// Use memset as opposed to = {} to avoid GCC missing initializer false
// positives.
std::memset(&sysinfo, 0, sizeof(SYSTEM_INFO));
GetSystemInfo(&sysinfo);
return sysinfo.dwNumberOfProcessors; // number of logical
// processors in the current
// group
#elif defined(BENCHMARK_OS_SOLARIS)
// Returns -1 in case of a failure.
int NumCPU = sysconf(_SC_NPROCESSORS_ONLN);
if (NumCPU < 0) {
fprintf(stderr,
"sysconf(_SC_NPROCESSORS_ONLN) failed with error: %s\n",
strerror(errno));
}
return NumCPU;
#else
int NumCPUs = 0;
int MaxID = -1;
std::ifstream f("/proc/cpuinfo");
if (!f.is_open()) {
std::cerr << "failed to open /proc/cpuinfo\n";
return -1;
}
const std::string Key = "processor";
std::string ln;
while (std::getline(f, ln)) {
if (ln.empty()) continue;
size_t SplitIdx = ln.find(':');
std::string value;
if (SplitIdx != std::string::npos) value = ln.substr(SplitIdx + 1);
if (ln.size() >= Key.size() && ln.compare(0, Key.size(), Key) == 0) {
NumCPUs++;
if (!value.empty()) {
int CurID = std::stoi(value);
MaxID = std::max(CurID, MaxID);
}
}
}
if (f.bad()) {
std::cerr << "Failure reading /proc/cpuinfo\n";
return -1;
}
if (!f.eof()) {
std::cerr << "Failed to read to end of /proc/cpuinfo\n";
return -1;
}
f.close();
if ((MaxID + 1) != NumCPUs) {
fprintf(stderr,
"CPU ID assignments in /proc/cpuinfo seem messed up."
" This is usually caused by a bad BIOS.\n");
}
return NumCPUs;
#endif
BENCHMARK_UNREACHABLE();
}
double GetCPUCyclesPerSecond() {
#if defined BENCHMARK_OS_LINUX || defined BENCHMARK_OS_CYGWIN
long freq;
// If the kernel is exporting the tsc frequency use that. There are issues
// where cpuinfo_max_freq cannot be relied on because the BIOS may be
// exporintg an invalid p-state (on x86) or p-states may be used to put the
// processor in a new mode (turbo mode). Essentially, those frequencies
// cannot always be relied upon. The same reasons apply to /proc/cpuinfo as
// well.
if (ReadFromFile("/sys/devices/system/cpu/cpu0/tsc_freq_khz", &freq)
// If CPU scaling is in effect, we want to use the *maximum* frequency,
// not whatever CPU speed some random processor happens to be using now.
|| ReadFromFile("/sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq",
&freq)) {
// The value is in kHz (as the file name suggests). For example, on a
// 2GHz warpstation, the file contains the value "2000000".
return freq * 1000.0;
}
const double error_value = -1;
double bogo_clock = error_value;
std::ifstream f("/proc/cpuinfo");
if (!f.is_open()) {
std::cerr << "failed to open /proc/cpuinfo\n";
return error_value;
}
auto startsWithKey = [](std::string const& Value, std::string const& Key) {
if (Key.size() > Value.size()) return false;
auto Cmp = [&](char X, char Y) {
return std::tolower(X) == std::tolower(Y);
};
return std::equal(Key.begin(), Key.end(), Value.begin(), Cmp);
};
std::string ln;
while (std::getline(f, ln)) {
if (ln.empty()) continue;
size_t SplitIdx = ln.find(':');
std::string value;
if (SplitIdx != std::string::npos) value = ln.substr(SplitIdx + 1);
// When parsing the "cpu MHz" and "bogomips" (fallback) entries, we only
// accept positive values. Some environments (virtual machines) report zero,
// which would cause infinite looping in WallTime_Init.
if (startsWithKey(ln, "cpu MHz")) {
if (!value.empty()) {
double cycles_per_second = std::stod(value) * 1000000.0;
if (cycles_per_second > 0) return cycles_per_second;
}
} else if (startsWithKey(ln, "bogomips")) {
if (!value.empty()) {
bogo_clock = std::stod(value) * 1000000.0;
if (bogo_clock < 0.0) bogo_clock = error_value;
}
}
}
if (f.bad()) {
std::cerr << "Failure reading /proc/cpuinfo\n";
return error_value;
}
if (!f.eof()) {
std::cerr << "Failed to read to end of /proc/cpuinfo\n";
return error_value;
}
f.close();
// If we found the bogomips clock, but nothing better, we'll use it (but
// we're not happy about it); otherwise, fallback to the rough estimation
// below.
if (bogo_clock >= 0.0) return bogo_clock;
#elif defined BENCHMARK_HAS_SYSCTL
constexpr auto* FreqStr =
#if defined(BENCHMARK_OS_FREEBSD) || defined(BENCHMARK_OS_NETBSD)
"machdep.tsc_freq";
#elif defined BENCHMARK_OS_OPENBSD
"hw.cpuspeed";
#else
"hw.cpufrequency";
#endif
unsigned long long hz = 0;
#if defined BENCHMARK_OS_OPENBSD
if (GetSysctl(FreqStr, &hz)) return hz * 1000000;
#else
if (GetSysctl(FreqStr, &hz)) return hz;
#endif
fprintf(stderr, "Unable to determine clock rate from sysctl: %s: %s\n",
FreqStr, strerror(errno));
#elif defined BENCHMARK_OS_WINDOWS
// In NT, read MHz from the registry. If we fail to do so or we're in win9x
// then make a crude estimate.
DWORD data, data_size = sizeof(data);
if (IsWindowsXPOrGreater() &&
SUCCEEDED(
SHGetValueA(HKEY_LOCAL_MACHINE,
"HARDWARE\\DESCRIPTION\\System\\CentralProcessor\\0",
"~MHz", nullptr, &data, &data_size)))
return static_cast<double>((int64_t)data *
(int64_t)(1000 * 1000)); // was mhz
#elif defined (BENCHMARK_OS_SOLARIS)
kstat_ctl_t *kc = kstat_open();
if (!kc) {
std::cerr << "failed to open /dev/kstat\n";
return -1;
}
kstat_t *ksp = kstat_lookup(kc, (char*)"cpu_info", -1, (char*)"cpu_info0");
if (!ksp) {
std::cerr << "failed to lookup in /dev/kstat\n";
return -1;
}
if (kstat_read(kc, ksp, NULL) < 0) {
std::cerr << "failed to read from /dev/kstat\n";
return -1;
}
kstat_named_t *knp =
(kstat_named_t*)kstat_data_lookup(ksp, (char*)"current_clock_Hz");
if (!knp) {
std::cerr << "failed to lookup data in /dev/kstat\n";
return -1;
}
if (knp->data_type != KSTAT_DATA_UINT64) {
std::cerr << "current_clock_Hz is of unexpected data type: "
<< knp->data_type << "\n";
return -1;
}
double clock_hz = knp->value.ui64;
kstat_close(kc);
return clock_hz;
#endif
// If we've fallen through, attempt to roughly estimate the CPU clock rate.
const int estimate_time_ms = 1000;
const auto start_ticks = cycleclock::Now();
SleepForMilliseconds(estimate_time_ms);
return static_cast<double>(cycleclock::Now() - start_ticks);
}
} // end namespace
const CPUInfo& CPUInfo::Get() {
static const CPUInfo* info = new CPUInfo();
return *info;
}
CPUInfo::CPUInfo()
: num_cpus(GetNumCPUs()),
cycles_per_second(GetCPUCyclesPerSecond()),
caches(GetCacheSizes()),
scaling_enabled(CpuScalingEnabled(num_cpus)) {}
} // end namespace benchmark

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#ifndef BENCHMARK_THREAD_MANAGER_H
#define BENCHMARK_THREAD_MANAGER_H
#include <atomic>
#include "benchmark/benchmark.h"
#include "mutex.h"
namespace benchmark {
namespace internal {
class ThreadManager {
public:
ThreadManager(int num_threads)
: alive_threads_(num_threads), start_stop_barrier_(num_threads) {}
Mutex& GetBenchmarkMutex() const RETURN_CAPABILITY(benchmark_mutex_) {
return benchmark_mutex_;
}
bool StartStopBarrier() EXCLUDES(end_cond_mutex_) {
return start_stop_barrier_.wait();
}
void NotifyThreadComplete() EXCLUDES(end_cond_mutex_) {
start_stop_barrier_.removeThread();
if (--alive_threads_ == 0) {
MutexLock lock(end_cond_mutex_);
end_condition_.notify_all();
}
}
void WaitForAllThreads() EXCLUDES(end_cond_mutex_) {
MutexLock lock(end_cond_mutex_);
end_condition_.wait(lock.native_handle(),
[this]() { return alive_threads_ == 0; });
}
public:
struct Result {
int64_t iterations = 0;
double real_time_used = 0;
double cpu_time_used = 0;
double manual_time_used = 0;
int64_t bytes_processed = 0;
int64_t items_processed = 0;
int64_t complexity_n = 0;
std::string report_label_;
std::string error_message_;
bool has_error_ = false;
UserCounters counters;
};
GUARDED_BY(GetBenchmarkMutex()) Result results;
private:
mutable Mutex benchmark_mutex_;
std::atomic<int> alive_threads_;
Barrier start_stop_barrier_;
Mutex end_cond_mutex_;
Condition end_condition_;
};
} // namespace internal
} // namespace benchmark
#endif // BENCHMARK_THREAD_MANAGER_H

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#ifndef BENCHMARK_THREAD_TIMER_H
#define BENCHMARK_THREAD_TIMER_H
#include "check.h"
#include "timers.h"
namespace benchmark {
namespace internal {
class ThreadTimer {
public:
ThreadTimer() = default;
// Called by each thread
void StartTimer() {
running_ = true;
start_real_time_ = ChronoClockNow();
start_cpu_time_ = ThreadCPUUsage();
}
// Called by each thread
void StopTimer() {
CHECK(running_);
running_ = false;
real_time_used_ += ChronoClockNow() - start_real_time_;
// Floating point error can result in the subtraction producing a negative
// time. Guard against that.
cpu_time_used_ += std::max<double>(ThreadCPUUsage() - start_cpu_time_, 0);
}
// Called by each thread
void SetIterationTime(double seconds) { manual_time_used_ += seconds; }
bool running() const { return running_; }
// REQUIRES: timer is not running
double real_time_used() {
CHECK(!running_);
return real_time_used_;
}
// REQUIRES: timer is not running
double cpu_time_used() {
CHECK(!running_);
return cpu_time_used_;
}
// REQUIRES: timer is not running
double manual_time_used() {
CHECK(!running_);
return manual_time_used_;
}
private:
bool running_ = false; // Is the timer running
double start_real_time_ = 0; // If running_
double start_cpu_time_ = 0; // If running_
// Accumulated time so far (does not contain current slice if running_)
double real_time_used_ = 0;
double cpu_time_used_ = 0;
// Manually set iteration time. User sets this with SetIterationTime(seconds).
double manual_time_used_ = 0;
};
} // namespace internal
} // namespace benchmark
#endif // BENCHMARK_THREAD_TIMER_H

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// Copyright 2015 Google Inc. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "timers.h"
#include "internal_macros.h"
#ifdef BENCHMARK_OS_WINDOWS
#include <Shlwapi.h>
#undef StrCat // Don't let StrCat in string_util.h be renamed to lstrcatA
#include <VersionHelpers.h>
#include <Windows.h>
#else
#include <fcntl.h>
#ifndef BENCHMARK_OS_FUCHSIA
#include <sys/resource.h>
#endif
#include <sys/time.h>
#include <sys/types.h> // this header must be included before 'sys/sysctl.h' to avoid compilation error on FreeBSD
#include <unistd.h>
#if defined BENCHMARK_OS_FREEBSD || defined BENCHMARK_OS_MACOSX
#include <sys/sysctl.h>
#endif
#if defined(BENCHMARK_OS_MACOSX)
#include <mach/mach_init.h>
#include <mach/mach_port.h>
#include <mach/thread_act.h>
#endif
#endif
#ifdef BENCHMARK_OS_EMSCRIPTEN
#include <emscripten.h>
#endif
#include <cerrno>
#include <cstdint>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <ctime>
#include <iostream>
#include <limits>
#include <mutex>
#include "check.h"
#include "log.h"
#include "sleep.h"
#include "string_util.h"
namespace benchmark {
// Suppress unused warnings on helper functions.
#if defined(__GNUC__)
#pragma GCC diagnostic ignored "-Wunused-function"
#endif
namespace {
#if defined(BENCHMARK_OS_WINDOWS)
double MakeTime(FILETIME const& kernel_time, FILETIME const& user_time) {
ULARGE_INTEGER kernel;
ULARGE_INTEGER user;
kernel.HighPart = kernel_time.dwHighDateTime;
kernel.LowPart = kernel_time.dwLowDateTime;
user.HighPart = user_time.dwHighDateTime;
user.LowPart = user_time.dwLowDateTime;
return (static_cast<double>(kernel.QuadPart) +
static_cast<double>(user.QuadPart)) *
1e-7;
}
#elif !defined(BENCHMARK_OS_FUCHSIA)
double MakeTime(struct rusage const& ru) {
return (static_cast<double>(ru.ru_utime.tv_sec) +
static_cast<double>(ru.ru_utime.tv_usec) * 1e-6 +
static_cast<double>(ru.ru_stime.tv_sec) +
static_cast<double>(ru.ru_stime.tv_usec) * 1e-6);
}
#endif
#if defined(BENCHMARK_OS_MACOSX)
double MakeTime(thread_basic_info_data_t const& info) {
return (static_cast<double>(info.user_time.seconds) +
static_cast<double>(info.user_time.microseconds) * 1e-6 +
static_cast<double>(info.system_time.seconds) +
static_cast<double>(info.system_time.microseconds) * 1e-6);
}
#endif
#if defined(CLOCK_PROCESS_CPUTIME_ID) || defined(CLOCK_THREAD_CPUTIME_ID)
double MakeTime(struct timespec const& ts) {
return ts.tv_sec + (static_cast<double>(ts.tv_nsec) * 1e-9);
}
#endif
BENCHMARK_NORETURN static void DiagnoseAndExit(const char* msg) {
std::cerr << "ERROR: " << msg << std::endl;
std::exit(EXIT_FAILURE);
}
} // end namespace
double ProcessCPUUsage() {
#if defined(BENCHMARK_OS_WINDOWS)
HANDLE proc = GetCurrentProcess();
FILETIME creation_time;
FILETIME exit_time;
FILETIME kernel_time;
FILETIME user_time;
if (GetProcessTimes(proc, &creation_time, &exit_time, &kernel_time,
&user_time))
return MakeTime(kernel_time, user_time);
DiagnoseAndExit("GetProccessTimes() failed");
#elif defined(BENCHMARK_OS_EMSCRIPTEN)
// clock_gettime(CLOCK_PROCESS_CPUTIME_ID, ...) returns 0 on Emscripten.
// Use Emscripten-specific API. Reported CPU time would be exactly the
// same as total time, but this is ok because there aren't long-latency
// syncronous system calls in Emscripten.
return emscripten_get_now() * 1e-3;
#elif defined(CLOCK_PROCESS_CPUTIME_ID) && !defined(BENCHMARK_OS_MACOSX)
// FIXME We want to use clock_gettime, but its not available in MacOS 10.11. See
// https://github.com/google/benchmark/pull/292
struct timespec spec;
if (clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &spec) == 0)
return MakeTime(spec);
DiagnoseAndExit("clock_gettime(CLOCK_PROCESS_CPUTIME_ID, ...) failed");
#else
struct rusage ru;
if (getrusage(RUSAGE_SELF, &ru) == 0) return MakeTime(ru);
DiagnoseAndExit("getrusage(RUSAGE_SELF, ...) failed");
#endif
}
double ThreadCPUUsage() {
#if defined(BENCHMARK_OS_WINDOWS)
HANDLE this_thread = GetCurrentThread();
FILETIME creation_time;
FILETIME exit_time;
FILETIME kernel_time;
FILETIME user_time;
GetThreadTimes(this_thread, &creation_time, &exit_time, &kernel_time,
&user_time);
return MakeTime(kernel_time, user_time);
#elif defined(BENCHMARK_OS_MACOSX)
// FIXME We want to use clock_gettime, but its not available in MacOS 10.11. See
// https://github.com/google/benchmark/pull/292
mach_msg_type_number_t count = THREAD_BASIC_INFO_COUNT;
thread_basic_info_data_t info;
mach_port_t thread = pthread_mach_thread_np(pthread_self());
if (thread_info(thread, THREAD_BASIC_INFO, (thread_info_t)&info, &count) ==
KERN_SUCCESS) {
return MakeTime(info);
}
DiagnoseAndExit("ThreadCPUUsage() failed when evaluating thread_info");
#elif defined(BENCHMARK_OS_EMSCRIPTEN)
// Emscripten doesn't support traditional threads
return ProcessCPUUsage();
#elif defined(BENCHMARK_OS_RTEMS)
// RTEMS doesn't support CLOCK_THREAD_CPUTIME_ID. See
// https://github.com/RTEMS/rtems/blob/master/cpukit/posix/src/clockgettime.c
return ProcessCPUUsage();
#elif defined(BENCHMARK_OS_SOLARIS)
struct rusage ru;
if (getrusage(RUSAGE_LWP, &ru) == 0) return MakeTime(ru);
DiagnoseAndExit("getrusage(RUSAGE_LWP, ...) failed");
#elif defined(CLOCK_THREAD_CPUTIME_ID)
struct timespec ts;
if (clock_gettime(CLOCK_THREAD_CPUTIME_ID, &ts) == 0) return MakeTime(ts);
DiagnoseAndExit("clock_gettime(CLOCK_THREAD_CPUTIME_ID, ...) failed");
#else
#error Per-thread timing is not available on your system.
#endif
}
namespace {
std::string DateTimeString(bool local) {
typedef std::chrono::system_clock Clock;
std::time_t now = Clock::to_time_t(Clock::now());
const std::size_t kStorageSize = 128;
char storage[kStorageSize];
std::size_t written;
if (local) {
#if defined(BENCHMARK_OS_WINDOWS)
written =
std::strftime(storage, sizeof(storage), "%x %X", ::localtime(&now));
#else
std::tm timeinfo;
::localtime_r(&now, &timeinfo);
written = std::strftime(storage, sizeof(storage), "%F %T", &timeinfo);
#endif
} else {
#if defined(BENCHMARK_OS_WINDOWS)
written = std::strftime(storage, sizeof(storage), "%x %X", ::gmtime(&now));
#else
std::tm timeinfo;
::gmtime_r(&now, &timeinfo);
written = std::strftime(storage, sizeof(storage), "%F %T", &timeinfo);
#endif
}
CHECK(written < kStorageSize);
((void)written); // prevent unused variable in optimized mode.
return std::string(storage);
}
} // end namespace
std::string LocalDateTimeString() { return DateTimeString(true); }
} // end namespace benchmark

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#ifndef BENCHMARK_TIMERS_H
#define BENCHMARK_TIMERS_H
#include <chrono>
#include <string>
namespace benchmark {
// Return the CPU usage of the current process
double ProcessCPUUsage();
// Return the CPU usage of the children of the current process
double ChildrenCPUUsage();
// Return the CPU usage of the current thread
double ThreadCPUUsage();
#if defined(HAVE_STEADY_CLOCK)
template <bool HighResIsSteady = std::chrono::high_resolution_clock::is_steady>
struct ChooseSteadyClock {
typedef std::chrono::high_resolution_clock type;
};
template <>
struct ChooseSteadyClock<false> {
typedef std::chrono::steady_clock type;
};
#endif
struct ChooseClockType {
#if defined(HAVE_STEADY_CLOCK)
typedef ChooseSteadyClock<>::type type;
#else
typedef std::chrono::high_resolution_clock type;
#endif
};
inline double ChronoClockNow() {
typedef ChooseClockType::type ClockType;
using FpSeconds = std::chrono::duration<double, std::chrono::seconds::period>;
return FpSeconds(ClockType::now().time_since_epoch()).count();
}
std::string LocalDateTimeString();
} // end namespace benchmark
#endif // BENCHMARK_TIMERS_H

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include(split_list)
set(ASM_TEST_FLAGS "")
check_cxx_compiler_flag(-O3 BENCHMARK_HAS_O3_FLAG)
if (BENCHMARK_HAS_O3_FLAG)
list(APPEND ASM_TEST_FLAGS -O3)
endif()
check_cxx_compiler_flag(-g0 BENCHMARK_HAS_G0_FLAG)
if (BENCHMARK_HAS_G0_FLAG)
list(APPEND ASM_TEST_FLAGS -g0)
endif()
check_cxx_compiler_flag(-fno-stack-protector BENCHMARK_HAS_FNO_STACK_PROTECTOR_FLAG)
if (BENCHMARK_HAS_FNO_STACK_PROTECTOR_FLAG)
list(APPEND ASM_TEST_FLAGS -fno-stack-protector)
endif()
split_list(ASM_TEST_FLAGS)
string(TOUPPER "${CMAKE_CXX_COMPILER_ID}" ASM_TEST_COMPILER)
macro(add_filecheck_test name)
cmake_parse_arguments(ARG "" "" "CHECK_PREFIXES" ${ARGV})
add_library(${name} OBJECT ${name}.cc)
set_target_properties(${name} PROPERTIES COMPILE_FLAGS "-S ${ASM_TEST_FLAGS}")
set(ASM_OUTPUT_FILE "${CMAKE_CURRENT_BINARY_DIR}/${name}.s")
add_custom_target(copy_${name} ALL
COMMAND ${PROJECT_SOURCE_DIR}/tools/strip_asm.py
$<TARGET_OBJECTS:${name}>
${ASM_OUTPUT_FILE}
BYPRODUCTS ${ASM_OUTPUT_FILE})
add_dependencies(copy_${name} ${name})
if (NOT ARG_CHECK_PREFIXES)
set(ARG_CHECK_PREFIXES "CHECK")
endif()
foreach(prefix ${ARG_CHECK_PREFIXES})
add_test(NAME run_${name}_${prefix}
COMMAND
${LLVM_FILECHECK_EXE} ${name}.cc
--input-file=${ASM_OUTPUT_FILE}
--check-prefixes=CHECK,CHECK-${ASM_TEST_COMPILER}
WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR})
endforeach()
endmacro()

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# Enable the tests
find_package(Threads REQUIRED)
include(CheckCXXCompilerFlag)
# NOTE: Some tests use `<cassert>` to perform the test. Therefore we must
# strip -DNDEBUG from the default CMake flags in DEBUG mode.
string(TOUPPER "${CMAKE_BUILD_TYPE}" uppercase_CMAKE_BUILD_TYPE)
if( NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "DEBUG" )
add_definitions( -UNDEBUG )
add_definitions(-DTEST_BENCHMARK_LIBRARY_HAS_NO_ASSERTIONS)
# Also remove /D NDEBUG to avoid MSVC warnings about conflicting defines.
foreach (flags_var_to_scrub
CMAKE_CXX_FLAGS_RELEASE
CMAKE_CXX_FLAGS_RELWITHDEBINFO
CMAKE_CXX_FLAGS_MINSIZEREL
CMAKE_C_FLAGS_RELEASE
CMAKE_C_FLAGS_RELWITHDEBINFO
CMAKE_C_FLAGS_MINSIZEREL)
string (REGEX REPLACE "(^| )[/-]D *NDEBUG($| )" " "
"${flags_var_to_scrub}" "${${flags_var_to_scrub}}")
endforeach()
endif()
check_cxx_compiler_flag(-O3 BENCHMARK_HAS_O3_FLAG)
set(BENCHMARK_O3_FLAG "")
if (BENCHMARK_HAS_O3_FLAG)
set(BENCHMARK_O3_FLAG "-O3")
endif()
# NOTE: These flags must be added after find_package(Threads REQUIRED) otherwise
# they will break the configuration check.
if (DEFINED BENCHMARK_CXX_LINKER_FLAGS)
list(APPEND CMAKE_EXE_LINKER_FLAGS ${BENCHMARK_CXX_LINKER_FLAGS})
endif()
add_library(output_test_helper STATIC output_test_helper.cc output_test.h)
macro(compile_benchmark_test name)
add_executable(${name} "${name}.cc")
target_link_libraries(${name} benchmark ${CMAKE_THREAD_LIBS_INIT})
endmacro(compile_benchmark_test)
macro(compile_benchmark_test_with_main name)
add_executable(${name} "${name}.cc")
target_link_libraries(${name} benchmark_main)
endmacro(compile_benchmark_test_with_main)
macro(compile_output_test name)
add_executable(${name} "${name}.cc" output_test.h)
target_link_libraries(${name} output_test_helper benchmark
${BENCHMARK_CXX_LIBRARIES} ${CMAKE_THREAD_LIBS_INIT})
endmacro(compile_output_test)
# Demonstration executable
compile_benchmark_test(benchmark_test)
add_test(benchmark benchmark_test --benchmark_min_time=0.01)
compile_benchmark_test(filter_test)
macro(add_filter_test name filter expect)
add_test(${name} filter_test --benchmark_min_time=0.01 --benchmark_filter=${filter} ${expect})
add_test(${name}_list_only filter_test --benchmark_list_tests --benchmark_filter=${filter} ${expect})
endmacro(add_filter_test)
add_filter_test(filter_simple "Foo" 3)
add_filter_test(filter_simple_negative "-Foo" 2)
add_filter_test(filter_suffix "BM_.*" 4)
add_filter_test(filter_suffix_negative "-BM_.*" 1)
add_filter_test(filter_regex_all ".*" 5)
add_filter_test(filter_regex_all_negative "-.*" 0)
add_filter_test(filter_regex_blank "" 5)
add_filter_test(filter_regex_blank_negative "-" 0)
add_filter_test(filter_regex_none "monkey" 0)
add_filter_test(filter_regex_none_negative "-monkey" 5)
add_filter_test(filter_regex_wildcard ".*Foo.*" 3)
add_filter_test(filter_regex_wildcard_negative "-.*Foo.*" 2)
add_filter_test(filter_regex_begin "^BM_.*" 4)
add_filter_test(filter_regex_begin_negative "-^BM_.*" 1)
add_filter_test(filter_regex_begin2 "^N" 1)
add_filter_test(filter_regex_begin2_negative "-^N" 4)
add_filter_test(filter_regex_end ".*Ba$" 1)
add_filter_test(filter_regex_end_negative "-.*Ba$" 4)
compile_benchmark_test(options_test)
add_test(options_benchmarks options_test --benchmark_min_time=0.01)
compile_benchmark_test(basic_test)
add_test(basic_benchmark basic_test --benchmark_min_time=0.01)
compile_benchmark_test(diagnostics_test)
add_test(diagnostics_test diagnostics_test --benchmark_min_time=0.01)
compile_benchmark_test(skip_with_error_test)
add_test(skip_with_error_test skip_with_error_test --benchmark_min_time=0.01)
compile_benchmark_test(donotoptimize_test)
# Some of the issues with DoNotOptimize only occur when optimization is enabled
check_cxx_compiler_flag(-O3 BENCHMARK_HAS_O3_FLAG)
if (BENCHMARK_HAS_O3_FLAG)
set_target_properties(donotoptimize_test PROPERTIES COMPILE_FLAGS "-O3")
endif()
add_test(donotoptimize_test donotoptimize_test --benchmark_min_time=0.01)
compile_benchmark_test(fixture_test)
add_test(fixture_test fixture_test --benchmark_min_time=0.01)
compile_benchmark_test(register_benchmark_test)
add_test(register_benchmark_test register_benchmark_test --benchmark_min_time=0.01)
compile_benchmark_test(map_test)
add_test(map_test map_test --benchmark_min_time=0.01)
compile_benchmark_test(multiple_ranges_test)
add_test(multiple_ranges_test multiple_ranges_test --benchmark_min_time=0.01)
compile_benchmark_test_with_main(link_main_test)
add_test(link_main_test link_main_test --benchmark_min_time=0.01)
compile_output_test(reporter_output_test)
add_test(reporter_output_test reporter_output_test --benchmark_min_time=0.01)
compile_output_test(templated_fixture_test)
add_test(templated_fixture_test templated_fixture_test --benchmark_min_time=0.01)
compile_output_test(user_counters_test)
add_test(user_counters_test user_counters_test --benchmark_min_time=0.01)
compile_output_test(user_counters_tabular_test)
add_test(user_counters_tabular_test user_counters_tabular_test --benchmark_counters_tabular=true --benchmark_min_time=0.01)
check_cxx_compiler_flag(-std=c++03 BENCHMARK_HAS_CXX03_FLAG)
if (BENCHMARK_HAS_CXX03_FLAG)
compile_benchmark_test(cxx03_test)
set_target_properties(cxx03_test
PROPERTIES
COMPILE_FLAGS "-std=c++03")
# libstdc++ provides different definitions within <map> between dialects. When
# LTO is enabled and -Werror is specified GCC diagnoses this ODR violation
# causing the test to fail to compile. To prevent this we explicitly disable
# the warning.
check_cxx_compiler_flag(-Wno-odr BENCHMARK_HAS_WNO_ODR)
if (BENCHMARK_ENABLE_LTO AND BENCHMARK_HAS_WNO_ODR)
set_target_properties(cxx03_test
PROPERTIES
LINK_FLAGS "-Wno-odr")
endif()
add_test(cxx03 cxx03_test --benchmark_min_time=0.01)
endif()
# Attempt to work around flaky test failures when running on Appveyor servers.
if (DEFINED ENV{APPVEYOR})
set(COMPLEXITY_MIN_TIME "0.5")
else()
set(COMPLEXITY_MIN_TIME "0.01")
endif()
compile_output_test(complexity_test)
add_test(complexity_benchmark complexity_test --benchmark_min_time=${COMPLEXITY_MIN_TIME})
###############################################################################
# GoogleTest Unit Tests
###############################################################################
if (BENCHMARK_ENABLE_GTEST_TESTS)
macro(compile_gtest name)
add_executable(${name} "${name}.cc")
if (TARGET googletest)
add_dependencies(${name} googletest)
endif()
if (GTEST_INCLUDE_DIRS)
target_include_directories(${name} PRIVATE ${GTEST_INCLUDE_DIRS})
endif()
target_link_libraries(${name} benchmark
${GTEST_BOTH_LIBRARIES} ${CMAKE_THREAD_LIBS_INIT})
endmacro(compile_gtest)
macro(add_gtest name)
compile_gtest(${name})
add_test(${name} ${name})
endmacro()
add_gtest(benchmark_gtest)
add_gtest(statistics_gtest)
endif(BENCHMARK_ENABLE_GTEST_TESTS)
###############################################################################
# Assembly Unit Tests
###############################################################################
if (BENCHMARK_ENABLE_ASSEMBLY_TESTS)
if (NOT LLVM_FILECHECK_EXE)
message(FATAL_ERROR "LLVM FileCheck is required when including this file")
endif()
include(AssemblyTests.cmake)
add_filecheck_test(donotoptimize_assembly_test)
add_filecheck_test(state_assembly_test)
add_filecheck_test(clobber_memory_assembly_test)
endif()
###############################################################################
# Code Coverage Configuration
###############################################################################
# Add the coverage command(s)
if(CMAKE_BUILD_TYPE)
string(TOLOWER ${CMAKE_BUILD_TYPE} CMAKE_BUILD_TYPE_LOWER)
endif()
if (${CMAKE_BUILD_TYPE_LOWER} MATCHES "coverage")
find_program(GCOV gcov)
find_program(LCOV lcov)
find_program(GENHTML genhtml)
find_program(CTEST ctest)
if (GCOV AND LCOV AND GENHTML AND CTEST AND HAVE_CXX_FLAG_COVERAGE)
add_custom_command(
OUTPUT ${CMAKE_BINARY_DIR}/lcov/index.html
COMMAND ${LCOV} -q -z -d .
COMMAND ${LCOV} -q --no-external -c -b "${CMAKE_SOURCE_DIR}" -d . -o before.lcov -i
COMMAND ${CTEST} --force-new-ctest-process
COMMAND ${LCOV} -q --no-external -c -b "${CMAKE_SOURCE_DIR}" -d . -o after.lcov
COMMAND ${LCOV} -q -a before.lcov -a after.lcov --output-file final.lcov
COMMAND ${LCOV} -q -r final.lcov "'${CMAKE_SOURCE_DIR}/test/*'" -o final.lcov
COMMAND ${GENHTML} final.lcov -o lcov --demangle-cpp --sort -p "${CMAKE_BINARY_DIR}" -t benchmark
DEPENDS filter_test benchmark_test options_test basic_test fixture_test cxx03_test complexity_test
WORKING_DIRECTORY ${CMAKE_BINARY_DIR}
COMMENT "Running LCOV"
)
add_custom_target(coverage
DEPENDS ${CMAKE_BINARY_DIR}/lcov/index.html
COMMENT "LCOV report at lcov/index.html"
)
message(STATUS "Coverage command added")
else()
if (HAVE_CXX_FLAG_COVERAGE)
set(CXX_FLAG_COVERAGE_MESSAGE supported)
else()
set(CXX_FLAG_COVERAGE_MESSAGE unavailable)
endif()
message(WARNING
"Coverage not available:\n"
" gcov: ${GCOV}\n"
" lcov: ${LCOV}\n"
" genhtml: ${GENHTML}\n"
" ctest: ${CTEST}\n"
" --coverage flag: ${CXX_FLAG_COVERAGE_MESSAGE}")
endif()
endif()

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#include "benchmark/benchmark.h"
#define BASIC_BENCHMARK_TEST(x) BENCHMARK(x)->Arg(8)->Arg(512)->Arg(8192)
void BM_empty(benchmark::State& state) {
for (auto _ : state) {
benchmark::DoNotOptimize(state.iterations());
}
}
BENCHMARK(BM_empty);
BENCHMARK(BM_empty)->ThreadPerCpu();
void BM_spin_empty(benchmark::State& state) {
for (auto _ : state) {
for (int x = 0; x < state.range(0); ++x) {
benchmark::DoNotOptimize(x);
}
}
}
BASIC_BENCHMARK_TEST(BM_spin_empty);
BASIC_BENCHMARK_TEST(BM_spin_empty)->ThreadPerCpu();
void BM_spin_pause_before(benchmark::State& state) {
for (int i = 0; i < state.range(0); ++i) {
benchmark::DoNotOptimize(i);
}
for (auto _ : state) {
for (int i = 0; i < state.range(0); ++i) {
benchmark::DoNotOptimize(i);
}
}
}
BASIC_BENCHMARK_TEST(BM_spin_pause_before);
BASIC_BENCHMARK_TEST(BM_spin_pause_before)->ThreadPerCpu();
void BM_spin_pause_during(benchmark::State& state) {
for (auto _ : state) {
state.PauseTiming();
for (int i = 0; i < state.range(0); ++i) {
benchmark::DoNotOptimize(i);
}
state.ResumeTiming();
for (int i = 0; i < state.range(0); ++i) {
benchmark::DoNotOptimize(i);
}
}
}
BASIC_BENCHMARK_TEST(BM_spin_pause_during);
BASIC_BENCHMARK_TEST(BM_spin_pause_during)->ThreadPerCpu();
void BM_pause_during(benchmark::State& state) {
for (auto _ : state) {
state.PauseTiming();
state.ResumeTiming();
}
}
BENCHMARK(BM_pause_during);
BENCHMARK(BM_pause_during)->ThreadPerCpu();
BENCHMARK(BM_pause_during)->UseRealTime();
BENCHMARK(BM_pause_during)->UseRealTime()->ThreadPerCpu();
void BM_spin_pause_after(benchmark::State& state) {
for (auto _ : state) {
for (int i = 0; i < state.range(0); ++i) {
benchmark::DoNotOptimize(i);
}
}
for (int i = 0; i < state.range(0); ++i) {
benchmark::DoNotOptimize(i);
}
}
BASIC_BENCHMARK_TEST(BM_spin_pause_after);
BASIC_BENCHMARK_TEST(BM_spin_pause_after)->ThreadPerCpu();
void BM_spin_pause_before_and_after(benchmark::State& state) {
for (int i = 0; i < state.range(0); ++i) {
benchmark::DoNotOptimize(i);
}
for (auto _ : state) {
for (int i = 0; i < state.range(0); ++i) {
benchmark::DoNotOptimize(i);
}
}
for (int i = 0; i < state.range(0); ++i) {
benchmark::DoNotOptimize(i);
}
}
BASIC_BENCHMARK_TEST(BM_spin_pause_before_and_after);
BASIC_BENCHMARK_TEST(BM_spin_pause_before_and_after)->ThreadPerCpu();
void BM_empty_stop_start(benchmark::State& state) {
for (auto _ : state) {
}
}
BENCHMARK(BM_empty_stop_start);
BENCHMARK(BM_empty_stop_start)->ThreadPerCpu();
void BM_KeepRunning(benchmark::State& state) {
size_t iter_count = 0;
assert(iter_count == state.iterations());
while (state.KeepRunning()) {
++iter_count;
}
assert(iter_count == state.iterations());
}
BENCHMARK(BM_KeepRunning);
void BM_KeepRunningBatch(benchmark::State& state) {
// Choose a prime batch size to avoid evenly dividing max_iterations.
const size_t batch_size = 101;
size_t iter_count = 0;
while (state.KeepRunningBatch(batch_size)) {
iter_count += batch_size;
}
assert(state.iterations() == iter_count);
}
BENCHMARK(BM_KeepRunningBatch);
void BM_RangedFor(benchmark::State& state) {
size_t iter_count = 0;
for (auto _ : state) {
++iter_count;
}
assert(iter_count == state.max_iterations);
}
BENCHMARK(BM_RangedFor);
// Ensure that StateIterator provides all the necessary typedefs required to
// instantiate std::iterator_traits.
static_assert(std::is_same<
typename std::iterator_traits<benchmark::State::StateIterator>::value_type,
typename benchmark::State::StateIterator::value_type>::value, "");
BENCHMARK_MAIN();

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#include <vector>
#include "../src/benchmark_register.h"
#include "gmock/gmock.h"
#include "gtest/gtest.h"
namespace {
TEST(AddRangeTest, Simple) {
std::vector<int> dst;
AddRange(&dst, 1, 2, 2);
EXPECT_THAT(dst, testing::ElementsAre(1, 2));
}
TEST(AddRangeTest, Simple64) {
std::vector<int64_t> dst;
AddRange(&dst, static_cast<int64_t>(1), static_cast<int64_t>(2), 2);
EXPECT_THAT(dst, testing::ElementsAre(1, 2));
}
TEST(AddRangeTest, Advanced) {
std::vector<int> dst;
AddRange(&dst, 5, 15, 2);
EXPECT_THAT(dst, testing::ElementsAre(5, 8, 15));
}
TEST(AddRangeTest, Advanced64) {
std::vector<int64_t> dst;
AddRange(&dst, static_cast<int64_t>(5), static_cast<int64_t>(15), 2);
EXPECT_THAT(dst, testing::ElementsAre(5, 8, 15));
}
} // end namespace

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#include "benchmark/benchmark.h"
#include <assert.h>
#include <math.h>
#include <stdint.h>
#include <chrono>
#include <cstdlib>
#include <iostream>
#include <limits>
#include <list>
#include <map>
#include <mutex>
#include <set>
#include <sstream>
#include <string>
#include <thread>
#include <utility>
#include <vector>
#if defined(__GNUC__)
#define BENCHMARK_NOINLINE __attribute__((noinline))
#else
#define BENCHMARK_NOINLINE
#endif
namespace {
int BENCHMARK_NOINLINE Factorial(uint32_t n) {
return (n == 1) ? 1 : n * Factorial(n - 1);
}
double CalculatePi(int depth) {
double pi = 0.0;
for (int i = 0; i < depth; ++i) {
double numerator = static_cast<double>(((i % 2) * 2) - 1);
double denominator = static_cast<double>((2 * i) - 1);
pi += numerator / denominator;
}
return (pi - 1.0) * 4;
}
std::set<int64_t> ConstructRandomSet(int64_t size) {
std::set<int64_t> s;
for (int i = 0; i < size; ++i) s.insert(s.end(), i);
return s;
}
std::mutex test_vector_mu;
std::vector<int>* test_vector = nullptr;
} // end namespace
static void BM_Factorial(benchmark::State& state) {
int fac_42 = 0;
for (auto _ : state) fac_42 = Factorial(8);
// Prevent compiler optimizations
std::stringstream ss;
ss << fac_42;
state.SetLabel(ss.str());
}
BENCHMARK(BM_Factorial);
BENCHMARK(BM_Factorial)->UseRealTime();
static void BM_CalculatePiRange(benchmark::State& state) {
double pi = 0.0;
for (auto _ : state) pi = CalculatePi(static_cast<int>(state.range(0)));
std::stringstream ss;
ss << pi;
state.SetLabel(ss.str());
}
BENCHMARK_RANGE(BM_CalculatePiRange, 1, 1024 * 1024);
static void BM_CalculatePi(benchmark::State& state) {
static const int depth = 1024;
for (auto _ : state) {
benchmark::DoNotOptimize(CalculatePi(static_cast<int>(depth)));
}
}
BENCHMARK(BM_CalculatePi)->Threads(8);
BENCHMARK(BM_CalculatePi)->ThreadRange(1, 32);
BENCHMARK(BM_CalculatePi)->ThreadPerCpu();
static void BM_SetInsert(benchmark::State& state) {
std::set<int64_t> data;
for (auto _ : state) {
state.PauseTiming();
data = ConstructRandomSet(state.range(0));
state.ResumeTiming();
for (int j = 0; j < state.range(1); ++j) data.insert(rand());
}
state.SetItemsProcessed(state.iterations() * state.range(1));
state.SetBytesProcessed(state.iterations() * state.range(1) * sizeof(int));
}
// Test many inserts at once to reduce the total iterations needed. Otherwise, the slower,
// non-timed part of each iteration will make the benchmark take forever.
BENCHMARK(BM_SetInsert)->Ranges({{1 << 10, 8 << 10}, {128, 512}});
template <typename Container,
typename ValueType = typename Container::value_type>
static void BM_Sequential(benchmark::State& state) {
ValueType v = 42;
for (auto _ : state) {
Container c;
for (int64_t i = state.range(0); --i;) c.push_back(v);
}
const int64_t items_processed = state.iterations() * state.range(0);
state.SetItemsProcessed(items_processed);
state.SetBytesProcessed(items_processed * sizeof(v));
}
BENCHMARK_TEMPLATE2(BM_Sequential, std::vector<int>, int)
->Range(1 << 0, 1 << 10);
BENCHMARK_TEMPLATE(BM_Sequential, std::list<int>)->Range(1 << 0, 1 << 10);
// Test the variadic version of BENCHMARK_TEMPLATE in C++11 and beyond.
#ifdef BENCHMARK_HAS_CXX11
BENCHMARK_TEMPLATE(BM_Sequential, std::vector<int>, int)->Arg(512);
#endif
static void BM_StringCompare(benchmark::State& state) {
size_t len = static_cast<size_t>(state.range(0));
std::string s1(len, '-');
std::string s2(len, '-');
for (auto _ : state) benchmark::DoNotOptimize(s1.compare(s2));
}
BENCHMARK(BM_StringCompare)->Range(1, 1 << 20);
static void BM_SetupTeardown(benchmark::State& state) {
if (state.thread_index == 0) {
// No need to lock test_vector_mu here as this is running single-threaded.
test_vector = new std::vector<int>();
}
int i = 0;
for (auto _ : state) {
std::lock_guard<std::mutex> l(test_vector_mu);
if (i % 2 == 0)
test_vector->push_back(i);
else
test_vector->pop_back();
++i;
}
if (state.thread_index == 0) {
delete test_vector;
}
}
BENCHMARK(BM_SetupTeardown)->ThreadPerCpu();
static void BM_LongTest(benchmark::State& state) {
double tracker = 0.0;
for (auto _ : state) {
for (int i = 0; i < state.range(0); ++i)
benchmark::DoNotOptimize(tracker += i);
}
}
BENCHMARK(BM_LongTest)->Range(1 << 16, 1 << 28);
static void BM_ParallelMemset(benchmark::State& state) {
int64_t size = state.range(0) / static_cast<int64_t>(sizeof(int));
int thread_size = static_cast<int>(size) / state.threads;
int from = thread_size * state.thread_index;
int to = from + thread_size;
if (state.thread_index == 0) {
test_vector = new std::vector<int>(static_cast<size_t>(size));
}
for (auto _ : state) {
for (int i = from; i < to; i++) {
// No need to lock test_vector_mu as ranges
// do not overlap between threads.
benchmark::DoNotOptimize(test_vector->at(i) = 1);
}
}
if (state.thread_index == 0) {
delete test_vector;
}
}
BENCHMARK(BM_ParallelMemset)->Arg(10 << 20)->ThreadRange(1, 4);
static void BM_ManualTiming(benchmark::State& state) {
int64_t slept_for = 0;
int64_t microseconds = state.range(0);
std::chrono::duration<double, std::micro> sleep_duration{
static_cast<double>(microseconds)};
for (auto _ : state) {
auto start = std::chrono::high_resolution_clock::now();
// Simulate some useful workload with a sleep
std::this_thread::sleep_for(
std::chrono::duration_cast<std::chrono::nanoseconds>(sleep_duration));
auto end = std::chrono::high_resolution_clock::now();
auto elapsed =
std::chrono::duration_cast<std::chrono::duration<double>>(end - start);
state.SetIterationTime(elapsed.count());
slept_for += microseconds;
}
state.SetItemsProcessed(slept_for);
}
BENCHMARK(BM_ManualTiming)->Range(1, 1 << 14)->UseRealTime();
BENCHMARK(BM_ManualTiming)->Range(1, 1 << 14)->UseManualTime();
#ifdef BENCHMARK_HAS_CXX11
template <class... Args>
void BM_with_args(benchmark::State& state, Args&&...) {
for (auto _ : state) {
}
}
BENCHMARK_CAPTURE(BM_with_args, int_test, 42, 43, 44);
BENCHMARK_CAPTURE(BM_with_args, string_and_pair_test, std::string("abc"),
std::pair<int, double>(42, 3.8));
void BM_non_template_args(benchmark::State& state, int, double) {
while(state.KeepRunning()) {}
}
BENCHMARK_CAPTURE(BM_non_template_args, basic_test, 0, 0);
#endif // BENCHMARK_HAS_CXX11
static void BM_DenseThreadRanges(benchmark::State& st) {
switch (st.range(0)) {
case 1:
assert(st.threads == 1 || st.threads == 2 || st.threads == 3);
break;
case 2:
assert(st.threads == 1 || st.threads == 3 || st.threads == 4);
break;
case 3:
assert(st.threads == 5 || st.threads == 8 || st.threads == 11 ||
st.threads == 14);
break;
default:
assert(false && "Invalid test case number");
}
while (st.KeepRunning()) {
}
}
BENCHMARK(BM_DenseThreadRanges)->Arg(1)->DenseThreadRange(1, 3);
BENCHMARK(BM_DenseThreadRanges)->Arg(2)->DenseThreadRange(1, 4, 2);
BENCHMARK(BM_DenseThreadRanges)->Arg(3)->DenseThreadRange(5, 14, 3);
BENCHMARK_MAIN();

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#include <benchmark/benchmark.h>
#ifdef __clang__
#pragma clang diagnostic ignored "-Wreturn-type"
#endif
extern "C" {
extern int ExternInt;
extern int ExternInt2;
extern int ExternInt3;
}
// CHECK-LABEL: test_basic:
extern "C" void test_basic() {
int x;
benchmark::DoNotOptimize(&x);
x = 101;
benchmark::ClobberMemory();
// CHECK: leaq [[DEST:[^,]+]], %rax
// CHECK: movl $101, [[DEST]]
// CHECK: ret
}
// CHECK-LABEL: test_redundant_store:
extern "C" void test_redundant_store() {
ExternInt = 3;
benchmark::ClobberMemory();
ExternInt = 51;
// CHECK-DAG: ExternInt
// CHECK-DAG: movl $3
// CHECK: movl $51
}
// CHECK-LABEL: test_redundant_read:
extern "C" void test_redundant_read() {
int x;
benchmark::DoNotOptimize(&x);
x = ExternInt;
benchmark::ClobberMemory();
x = ExternInt2;
// CHECK: leaq [[DEST:[^,]+]], %rax
// CHECK: ExternInt(%rip)
// CHECK: movl %eax, [[DEST]]
// CHECK-NOT: ExternInt2
// CHECK: ret
}
// CHECK-LABEL: test_redundant_read2:
extern "C" void test_redundant_read2() {
int x;
benchmark::DoNotOptimize(&x);
x = ExternInt;
benchmark::ClobberMemory();
x = ExternInt2;
benchmark::ClobberMemory();
// CHECK: leaq [[DEST:[^,]+]], %rax
// CHECK: ExternInt(%rip)
// CHECK: movl %eax, [[DEST]]
// CHECK: ExternInt2(%rip)
// CHECK: movl %eax, [[DEST]]
// CHECK: ret
}

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#undef NDEBUG
#include <algorithm>
#include <cassert>
#include <cmath>
#include <cstdlib>
#include <vector>
#include "benchmark/benchmark.h"
#include "output_test.h"
namespace {
#define ADD_COMPLEXITY_CASES(...) \
int CONCAT(dummy, __LINE__) = AddComplexityTest(__VA_ARGS__)
int AddComplexityTest(std::string big_o_test_name, std::string rms_test_name,
std::string big_o) {
SetSubstitutions({{"%bigo_name", big_o_test_name},
{"%rms_name", rms_test_name},
{"%bigo_str", "[ ]* %float " + big_o},
{"%bigo", big_o},
{"%rms", "[ ]*[0-9]+ %"}});
AddCases(
TC_ConsoleOut,
{{"^%bigo_name %bigo_str %bigo_str[ ]*$"},
{"^%bigo_name", MR_Not}, // Assert we we didn't only matched a name.
{"^%rms_name %rms %rms[ ]*$", MR_Next}});
AddCases(TC_JSONOut, {{"\"name\": \"%bigo_name\",$"},
{"\"cpu_coefficient\": %float,$", MR_Next},
{"\"real_coefficient\": %float,$", MR_Next},
{"\"big_o\": \"%bigo\",$", MR_Next},
{"\"time_unit\": \"ns\"$", MR_Next},
{"}", MR_Next},
{"\"name\": \"%rms_name\",$"},
{"\"rms\": %float$", MR_Next},
{"}", MR_Next}});
AddCases(TC_CSVOut, {{"^\"%bigo_name\",,%float,%float,%bigo,,,,,$"},
{"^\"%bigo_name\"", MR_Not},
{"^\"%rms_name\",,%float,%float,,,,,,$", MR_Next}});
return 0;
}
} // end namespace
// ========================================================================= //
// --------------------------- Testing BigO O(1) --------------------------- //
// ========================================================================= //
void BM_Complexity_O1(benchmark::State& state) {
for (auto _ : state) {
for (int i = 0; i < 1024; ++i) {
benchmark::DoNotOptimize(&i);
}
}
state.SetComplexityN(state.range(0));
}
BENCHMARK(BM_Complexity_O1)->Range(1, 1 << 18)->Complexity(benchmark::o1);
BENCHMARK(BM_Complexity_O1)->Range(1, 1 << 18)->Complexity();
BENCHMARK(BM_Complexity_O1)->Range(1, 1 << 18)->Complexity([](int64_t) {
return 1.0;
});
const char *big_o_1_test_name = "BM_Complexity_O1_BigO";
const char *rms_o_1_test_name = "BM_Complexity_O1_RMS";
const char *enum_big_o_1 = "\\([0-9]+\\)";
// FIXME: Tolerate both '(1)' and 'lgN' as output when the complexity is auto
// deduced.
// See https://github.com/google/benchmark/issues/272
const char *auto_big_o_1 = "(\\([0-9]+\\))|(lgN)";
const char *lambda_big_o_1 = "f\\(N\\)";
// Add enum tests
ADD_COMPLEXITY_CASES(big_o_1_test_name, rms_o_1_test_name, enum_big_o_1);
// Add auto enum tests
ADD_COMPLEXITY_CASES(big_o_1_test_name, rms_o_1_test_name, auto_big_o_1);
// Add lambda tests
ADD_COMPLEXITY_CASES(big_o_1_test_name, rms_o_1_test_name, lambda_big_o_1);
// ========================================================================= //
// --------------------------- Testing BigO O(N) --------------------------- //
// ========================================================================= //
std::vector<int> ConstructRandomVector(int64_t size) {
std::vector<int> v;
v.reserve(static_cast<int>(size));
for (int i = 0; i < size; ++i) {
v.push_back(std::rand() % size);
}
return v;
}
void BM_Complexity_O_N(benchmark::State& state) {
auto v = ConstructRandomVector(state.range(0));
// Test worst case scenario (item not in vector)
const int64_t item_not_in_vector = state.range(0) * 2;
for (auto _ : state) {
benchmark::DoNotOptimize(std::find(v.begin(), v.end(), item_not_in_vector));
}
state.SetComplexityN(state.range(0));
}
BENCHMARK(BM_Complexity_O_N)
->RangeMultiplier(2)
->Range(1 << 10, 1 << 16)
->Complexity(benchmark::oN);
BENCHMARK(BM_Complexity_O_N)
->RangeMultiplier(2)
->Range(1 << 10, 1 << 16)
->Complexity([](int64_t n) -> double { return n; });
BENCHMARK(BM_Complexity_O_N)
->RangeMultiplier(2)
->Range(1 << 10, 1 << 16)
->Complexity();
const char *big_o_n_test_name = "BM_Complexity_O_N_BigO";
const char *rms_o_n_test_name = "BM_Complexity_O_N_RMS";
const char *enum_auto_big_o_n = "N";
const char *lambda_big_o_n = "f\\(N\\)";
// Add enum tests
ADD_COMPLEXITY_CASES(big_o_n_test_name, rms_o_n_test_name, enum_auto_big_o_n);
// Add lambda tests
ADD_COMPLEXITY_CASES(big_o_n_test_name, rms_o_n_test_name, lambda_big_o_n);
// ========================================================================= //
// ------------------------- Testing BigO O(N*lgN) ------------------------- //
// ========================================================================= //
static void BM_Complexity_O_N_log_N(benchmark::State& state) {
auto v = ConstructRandomVector(state.range(0));
for (auto _ : state) {
std::sort(v.begin(), v.end());
}
state.SetComplexityN(state.range(0));
}
BENCHMARK(BM_Complexity_O_N_log_N)
->RangeMultiplier(2)
->Range(1 << 10, 1 << 16)
->Complexity(benchmark::oNLogN);
BENCHMARK(BM_Complexity_O_N_log_N)
->RangeMultiplier(2)
->Range(1 << 10, 1 << 16)
->Complexity([](int64_t n) { return n * log2(n); });
BENCHMARK(BM_Complexity_O_N_log_N)
->RangeMultiplier(2)
->Range(1 << 10, 1 << 16)
->Complexity();
const char *big_o_n_lg_n_test_name = "BM_Complexity_O_N_log_N_BigO";
const char *rms_o_n_lg_n_test_name = "BM_Complexity_O_N_log_N_RMS";
const char *enum_auto_big_o_n_lg_n = "NlgN";
const char *lambda_big_o_n_lg_n = "f\\(N\\)";
// Add enum tests
ADD_COMPLEXITY_CASES(big_o_n_lg_n_test_name, rms_o_n_lg_n_test_name,
enum_auto_big_o_n_lg_n);
// Add lambda tests
ADD_COMPLEXITY_CASES(big_o_n_lg_n_test_name, rms_o_n_lg_n_test_name,
lambda_big_o_n_lg_n);
// ========================================================================= //
// --------------------------- TEST CASES END ------------------------------ //
// ========================================================================= //
int main(int argc, char *argv[]) { RunOutputTests(argc, argv); }

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#undef NDEBUG
#include <cassert>
#include <cstddef>
#include "benchmark/benchmark.h"
#if __cplusplus >= 201103L
#error C++11 or greater detected. Should be C++03.
#endif
#ifdef BENCHMARK_HAS_CXX11
#error C++11 or greater detected by the library. BENCHMARK_HAS_CXX11 is defined.
#endif
void BM_empty(benchmark::State& state) {
while (state.KeepRunning()) {
volatile std::size_t x = state.iterations();
((void)x);
}
}
BENCHMARK(BM_empty);
// The new C++11 interface for args/ranges requires initializer list support.
// Therefore we provide the old interface to support C++03.
void BM_old_arg_range_interface(benchmark::State& state) {
assert((state.range(0) == 1 && state.range(1) == 2) ||
(state.range(0) == 5 && state.range(1) == 6));
while (state.KeepRunning()) {
}
}
BENCHMARK(BM_old_arg_range_interface)->ArgPair(1, 2)->RangePair(5, 5, 6, 6);
template <class T, class U>
void BM_template2(benchmark::State& state) {
BM_empty(state);
}
BENCHMARK_TEMPLATE2(BM_template2, int, long);
template <class T>
void BM_template1(benchmark::State& state) {
BM_empty(state);
}
BENCHMARK_TEMPLATE(BM_template1, long);
BENCHMARK_TEMPLATE1(BM_template1, int);
template <class T>
struct BM_Fixture : public ::benchmark::Fixture {
};
BENCHMARK_TEMPLATE_F(BM_Fixture, BM_template1, long)(benchmark::State& state) {
BM_empty(state);
}
BENCHMARK_TEMPLATE1_F(BM_Fixture, BM_template2, int)(benchmark::State& state) {
BM_empty(state);
}
void BM_counters(benchmark::State& state) {
BM_empty(state);
state.counters["Foo"] = 2;
}
BENCHMARK(BM_counters);
BENCHMARK_MAIN();

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// Testing:
// State::PauseTiming()
// State::ResumeTiming()
// Test that CHECK's within these function diagnose when they are called
// outside of the KeepRunning() loop.
//
// NOTE: Users should NOT include or use src/check.h. This is only done in
// order to test library internals.
#include <cstdlib>
#include <stdexcept>
#include "../src/check.h"
#include "benchmark/benchmark.h"
#if defined(__GNUC__) && !defined(__EXCEPTIONS)
#define TEST_HAS_NO_EXCEPTIONS
#endif
void TestHandler() {
#ifndef TEST_HAS_NO_EXCEPTIONS
throw std::logic_error("");
#else
std::abort();
#endif
}
void try_invalid_pause_resume(benchmark::State& state) {
#if !defined(TEST_BENCHMARK_LIBRARY_HAS_NO_ASSERTIONS) && !defined(TEST_HAS_NO_EXCEPTIONS)
try {
state.PauseTiming();
std::abort();
} catch (std::logic_error const&) {
}
try {
state.ResumeTiming();
std::abort();
} catch (std::logic_error const&) {
}
#else
(void)state; // avoid unused warning
#endif
}
void BM_diagnostic_test(benchmark::State& state) {
static bool called_once = false;
if (called_once == false) try_invalid_pause_resume(state);
for (auto _ : state) {
benchmark::DoNotOptimize(state.iterations());
}
if (called_once == false) try_invalid_pause_resume(state);
called_once = true;
}
BENCHMARK(BM_diagnostic_test);
void BM_diagnostic_test_keep_running(benchmark::State& state) {
static bool called_once = false;
if (called_once == false) try_invalid_pause_resume(state);
while(state.KeepRunning()) {
benchmark::DoNotOptimize(state.iterations());
}
if (called_once == false) try_invalid_pause_resume(state);
called_once = true;
}
BENCHMARK(BM_diagnostic_test_keep_running);
int main(int argc, char* argv[]) {
benchmark::internal::GetAbortHandler() = &TestHandler;
benchmark::Initialize(&argc, argv);
benchmark::RunSpecifiedBenchmarks();
}

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#include <benchmark/benchmark.h>
#ifdef __clang__
#pragma clang diagnostic ignored "-Wreturn-type"
#endif
extern "C" {
extern int ExternInt;
extern int ExternInt2;
extern int ExternInt3;
inline int Add42(int x) { return x + 42; }
struct NotTriviallyCopyable {
NotTriviallyCopyable();
explicit NotTriviallyCopyable(int x) : value(x) {}
NotTriviallyCopyable(NotTriviallyCopyable const&);
int value;
};
struct Large {
int value;
int data[2];
};
}
// CHECK-LABEL: test_with_rvalue:
extern "C" void test_with_rvalue() {
benchmark::DoNotOptimize(Add42(0));
// CHECK: movl $42, %eax
// CHECK: ret
}
// CHECK-LABEL: test_with_large_rvalue:
extern "C" void test_with_large_rvalue() {
benchmark::DoNotOptimize(Large{ExternInt, {ExternInt, ExternInt}});
// CHECK: ExternInt(%rip)
// CHECK: movl %eax, -{{[0-9]+}}(%[[REG:[a-z]+]]
// CHECK: movl %eax, -{{[0-9]+}}(%[[REG]])
// CHECK: movl %eax, -{{[0-9]+}}(%[[REG]])
// CHECK: ret
}
// CHECK-LABEL: test_with_non_trivial_rvalue:
extern "C" void test_with_non_trivial_rvalue() {
benchmark::DoNotOptimize(NotTriviallyCopyable(ExternInt));
// CHECK: mov{{l|q}} ExternInt(%rip)
// CHECK: ret
}
// CHECK-LABEL: test_with_lvalue:
extern "C" void test_with_lvalue() {
int x = 101;
benchmark::DoNotOptimize(x);
// CHECK-GNU: movl $101, %eax
// CHECK-CLANG: movl $101, -{{[0-9]+}}(%[[REG:[a-z]+]])
// CHECK: ret
}
// CHECK-LABEL: test_with_large_lvalue:
extern "C" void test_with_large_lvalue() {
Large L{ExternInt, {ExternInt, ExternInt}};
benchmark::DoNotOptimize(L);
// CHECK: ExternInt(%rip)
// CHECK: movl %eax, -{{[0-9]+}}(%[[REG:[a-z]+]])
// CHECK: movl %eax, -{{[0-9]+}}(%[[REG]])
// CHECK: movl %eax, -{{[0-9]+}}(%[[REG]])
// CHECK: ret
}
// CHECK-LABEL: test_with_non_trivial_lvalue:
extern "C" void test_with_non_trivial_lvalue() {
NotTriviallyCopyable NTC(ExternInt);
benchmark::DoNotOptimize(NTC);
// CHECK: ExternInt(%rip)
// CHECK: movl %eax, -{{[0-9]+}}(%[[REG:[a-z]+]])
// CHECK: ret
}
// CHECK-LABEL: test_with_const_lvalue:
extern "C" void test_with_const_lvalue() {
const int x = 123;
benchmark::DoNotOptimize(x);
// CHECK: movl $123, %eax
// CHECK: ret
}
// CHECK-LABEL: test_with_large_const_lvalue:
extern "C" void test_with_large_const_lvalue() {
const Large L{ExternInt, {ExternInt, ExternInt}};
benchmark::DoNotOptimize(L);
// CHECK: ExternInt(%rip)
// CHECK: movl %eax, -{{[0-9]+}}(%[[REG:[a-z]+]])
// CHECK: movl %eax, -{{[0-9]+}}(%[[REG]])
// CHECK: movl %eax, -{{[0-9]+}}(%[[REG]])
// CHECK: ret
}
// CHECK-LABEL: test_with_non_trivial_const_lvalue:
extern "C" void test_with_non_trivial_const_lvalue() {
const NotTriviallyCopyable Obj(ExternInt);
benchmark::DoNotOptimize(Obj);
// CHECK: mov{{q|l}} ExternInt(%rip)
// CHECK: ret
}
// CHECK-LABEL: test_div_by_two:
extern "C" int test_div_by_two(int input) {
int divisor = 2;
benchmark::DoNotOptimize(divisor);
return input / divisor;
// CHECK: movl $2, [[DEST:.*]]
// CHECK: idivl [[DEST]]
// CHECK: ret
}
// CHECK-LABEL: test_inc_integer:
extern "C" int test_inc_integer() {
int x = 0;
for (int i=0; i < 5; ++i)
benchmark::DoNotOptimize(++x);
// CHECK: movl $1, [[DEST:.*]]
// CHECK: {{(addl \$1,|incl)}} [[DEST]]
// CHECK: {{(addl \$1,|incl)}} [[DEST]]
// CHECK: {{(addl \$1,|incl)}} [[DEST]]
// CHECK: {{(addl \$1,|incl)}} [[DEST]]
// CHECK-CLANG: movl [[DEST]], %eax
// CHECK: ret
return x;
}
// CHECK-LABEL: test_pointer_rvalue
extern "C" void test_pointer_rvalue() {
// CHECK: movl $42, [[DEST:.*]]
// CHECK: leaq [[DEST]], %rax
// CHECK-CLANG: movq %rax, -{{[0-9]+}}(%[[REG:[a-z]+]])
// CHECK: ret
int x = 42;
benchmark::DoNotOptimize(&x);
}
// CHECK-LABEL: test_pointer_const_lvalue:
extern "C" void test_pointer_const_lvalue() {
// CHECK: movl $42, [[DEST:.*]]
// CHECK: leaq [[DEST]], %rax
// CHECK-CLANG: movq %rax, -{{[0-9]+}}(%[[REG:[a-z]+]])
// CHECK: ret
int x = 42;
int * const xp = &x;
benchmark::DoNotOptimize(xp);
}
// CHECK-LABEL: test_pointer_lvalue:
extern "C" void test_pointer_lvalue() {
// CHECK: movl $42, [[DEST:.*]]
// CHECK: leaq [[DEST]], %rax
// CHECK-CLANG: movq %rax, -{{[0-9]+}}(%[[REG:[a-z+]+]])
// CHECK: ret
int x = 42;
int *xp = &x;
benchmark::DoNotOptimize(xp);
}

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#include "benchmark/benchmark.h"
#include <cstdint>
namespace {
#if defined(__GNUC__)
std::uint64_t double_up(const std::uint64_t x) __attribute__((const));
#endif
std::uint64_t double_up(const std::uint64_t x) { return x * 2; }
}
// Using DoNotOptimize on types like BitRef seem to cause a lot of problems
// with the inline assembly on both GCC and Clang.
struct BitRef {
int index;
unsigned char &byte;
public:
static BitRef Make() {
static unsigned char arr[2] = {};
BitRef b(1, arr[0]);
return b;
}
private:
BitRef(int i, unsigned char& b) : index(i), byte(b) {}
};
int main(int, char*[]) {
// this test verifies compilation of DoNotOptimize() for some types
char buffer8[8] = "";
benchmark::DoNotOptimize(buffer8);
char buffer20[20] = "";
benchmark::DoNotOptimize(buffer20);
char buffer1024[1024] = "";
benchmark::DoNotOptimize(buffer1024);
benchmark::DoNotOptimize(&buffer1024[0]);
int x = 123;
benchmark::DoNotOptimize(x);
benchmark::DoNotOptimize(&x);
benchmark::DoNotOptimize(x += 42);
benchmark::DoNotOptimize(double_up(x));
// These tests are to e
benchmark::DoNotOptimize(BitRef::Make());
BitRef lval = BitRef::Make();
benchmark::DoNotOptimize(lval);
}

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#include "benchmark/benchmark.h"
#include <cassert>
#include <cmath>
#include <cstdint>
#include <cstdlib>
#include <iostream>
#include <limits>
#include <sstream>
#include <string>
namespace {
class TestReporter : public benchmark::ConsoleReporter {
public:
virtual bool ReportContext(const Context& context) {
return ConsoleReporter::ReportContext(context);
};
virtual void ReportRuns(const std::vector<Run>& report) {
++count_;
ConsoleReporter::ReportRuns(report);
};
TestReporter() : count_(0) {}
virtual ~TestReporter() {}
size_t GetCount() const { return count_; }
private:
mutable size_t count_;
};
} // end namespace
static void NoPrefix(benchmark::State& state) {
for (auto _ : state) {
}
}
BENCHMARK(NoPrefix);
static void BM_Foo(benchmark::State& state) {
for (auto _ : state) {
}
}
BENCHMARK(BM_Foo);
static void BM_Bar(benchmark::State& state) {
for (auto _ : state) {
}
}
BENCHMARK(BM_Bar);
static void BM_FooBar(benchmark::State& state) {
for (auto _ : state) {
}
}
BENCHMARK(BM_FooBar);
static void BM_FooBa(benchmark::State& state) {
for (auto _ : state) {
}
}
BENCHMARK(BM_FooBa);
int main(int argc, char **argv) {
bool list_only = false;
for (int i = 0; i < argc; ++i)
list_only |= std::string(argv[i]).find("--benchmark_list_tests") !=
std::string::npos;
benchmark::Initialize(&argc, argv);
TestReporter test_reporter;
const size_t returned_count =
benchmark::RunSpecifiedBenchmarks(&test_reporter);
if (argc == 2) {
// Make sure we ran all of the tests
std::stringstream ss(argv[1]);
size_t expected_return;
ss >> expected_return;
if (returned_count != expected_return) {
std::cerr << "ERROR: Expected " << expected_return
<< " tests to match the filter but returned_count = "
<< returned_count << std::endl;
return -1;
}
const size_t expected_reports = list_only ? 0 : expected_return;
const size_t reports_count = test_reporter.GetCount();
if (reports_count != expected_reports) {
std::cerr << "ERROR: Expected " << expected_reports
<< " tests to be run but reported_count = " << reports_count
<< std::endl;
return -1;
}
}
return 0;
}

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#include "benchmark/benchmark.h"
#include <cassert>
#include <memory>
class MyFixture : public ::benchmark::Fixture {
public:
void SetUp(const ::benchmark::State& state) {
if (state.thread_index == 0) {
assert(data.get() == nullptr);
data.reset(new int(42));
}
}
void TearDown(const ::benchmark::State& state) {
if (state.thread_index == 0) {
assert(data.get() != nullptr);
data.reset();
}
}
~MyFixture() { assert(data == nullptr); }
std::unique_ptr<int> data;
};
BENCHMARK_F(MyFixture, Foo)(benchmark::State &st) {
assert(data.get() != nullptr);
assert(*data == 42);
for (auto _ : st) {
}
}
BENCHMARK_DEFINE_F(MyFixture, Bar)(benchmark::State& st) {
if (st.thread_index == 0) {
assert(data.get() != nullptr);
assert(*data == 42);
}
for (auto _ : st) {
assert(data.get() != nullptr);
assert(*data == 42);
}
st.SetItemsProcessed(st.range(0));
}
BENCHMARK_REGISTER_F(MyFixture, Bar)->Arg(42);
BENCHMARK_REGISTER_F(MyFixture, Bar)->Arg(42)->ThreadPerCpu();
BENCHMARK_MAIN();

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#include "benchmark/benchmark.h"
void BM_empty(benchmark::State& state) {
for (auto _ : state) {
benchmark::DoNotOptimize(state.iterations());
}
}
BENCHMARK(BM_empty);

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#include "benchmark/benchmark.h"
#include <cstdlib>
#include <map>
namespace {
std::map<int, int> ConstructRandomMap(int size) {
std::map<int, int> m;
for (int i = 0; i < size; ++i) {
m.insert(std::make_pair(std::rand() % size, std::rand() % size));
}
return m;
}
} // namespace
// Basic version.
static void BM_MapLookup(benchmark::State& state) {
const int size = static_cast<int>(state.range(0));
std::map<int, int> m;
for (auto _ : state) {
state.PauseTiming();
m = ConstructRandomMap(size);
state.ResumeTiming();
for (int i = 0; i < size; ++i) {
benchmark::DoNotOptimize(m.find(std::rand() % size));
}
}
state.SetItemsProcessed(state.iterations() * size);
}
BENCHMARK(BM_MapLookup)->Range(1 << 3, 1 << 12);
// Using fixtures.
class MapFixture : public ::benchmark::Fixture {
public:
void SetUp(const ::benchmark::State& st) {
m = ConstructRandomMap(static_cast<int>(st.range(0)));
}
void TearDown(const ::benchmark::State&) { m.clear(); }
std::map<int, int> m;
};
BENCHMARK_DEFINE_F(MapFixture, Lookup)(benchmark::State& state) {
const int size = static_cast<int>(state.range(0));
for (auto _ : state) {
for (int i = 0; i < size; ++i) {
benchmark::DoNotOptimize(m.find(std::rand() % size));
}
}
state.SetItemsProcessed(state.iterations() * size);
}
BENCHMARK_REGISTER_F(MapFixture, Lookup)->Range(1 << 3, 1 << 12);
BENCHMARK_MAIN();

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#include "benchmark/benchmark.h"
#include <cassert>
#include <iostream>
#include <set>
#include <vector>
class MultipleRangesFixture : public ::benchmark::Fixture {
public:
MultipleRangesFixture()
: expectedValues({{1, 3, 5},
{1, 3, 8},
{1, 3, 15},
{2, 3, 5},
{2, 3, 8},
{2, 3, 15},
{1, 4, 5},
{1, 4, 8},
{1, 4, 15},
{2, 4, 5},
{2, 4, 8},
{2, 4, 15},
{1, 7, 5},
{1, 7, 8},
{1, 7, 15},
{2, 7, 5},
{2, 7, 8},
{2, 7, 15},
{7, 6, 3}}) {}
void SetUp(const ::benchmark::State& state) {
std::vector<int64_t> ranges = {state.range(0), state.range(1),
state.range(2)};
assert(expectedValues.find(ranges) != expectedValues.end());
actualValues.insert(ranges);
}
// NOTE: This is not TearDown as we want to check after _all_ runs are
// complete.
virtual ~MultipleRangesFixture() {
assert(actualValues.size() == expectedValues.size());
if (actualValues.size() != expectedValues.size()) {
std::cout << "EXPECTED\n";
for (auto v : expectedValues) {
std::cout << "{";
for (int64_t iv : v) {
std::cout << iv << ", ";
}
std::cout << "}\n";
}
std::cout << "ACTUAL\n";
for (auto v : actualValues) {
std::cout << "{";
for (int64_t iv : v) {
std::cout << iv << ", ";
}
std::cout << "}\n";
}
}
}
std::set<std::vector<int64_t>> expectedValues;
std::set<std::vector<int64_t>> actualValues;
};
BENCHMARK_DEFINE_F(MultipleRangesFixture, Empty)(benchmark::State& state) {
for (auto _ : state) {
int64_t product = state.range(0) * state.range(1) * state.range(2);
for (int64_t x = 0; x < product; x++) {
benchmark::DoNotOptimize(x);
}
}
}
BENCHMARK_REGISTER_F(MultipleRangesFixture, Empty)
->RangeMultiplier(2)
->Ranges({{1, 2}, {3, 7}, {5, 15}})
->Args({7, 6, 3});
void BM_CheckDefaultArgument(benchmark::State& state) {
// Test that the 'range()' without an argument is the same as 'range(0)'.
assert(state.range() == state.range(0));
assert(state.range() != state.range(1));
for (auto _ : state) {
}
}
BENCHMARK(BM_CheckDefaultArgument)->Ranges({{1, 5}, {6, 10}});
static void BM_MultipleRanges(benchmark::State& st) {
for (auto _ : st) {
}
}
BENCHMARK(BM_MultipleRanges)->Ranges({{5, 5}, {6, 6}});
BENCHMARK_MAIN();

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#include "benchmark/benchmark.h"
#include <chrono>
#include <thread>
#if defined(NDEBUG)
#undef NDEBUG
#endif
#include <cassert>
void BM_basic(benchmark::State& state) {
for (auto _ : state) {
}
}
void BM_basic_slow(benchmark::State& state) {
std::chrono::milliseconds sleep_duration(state.range(0));
for (auto _ : state) {
std::this_thread::sleep_for(
std::chrono::duration_cast<std::chrono::nanoseconds>(sleep_duration));
}
}
BENCHMARK(BM_basic);
BENCHMARK(BM_basic)->Arg(42);
BENCHMARK(BM_basic_slow)->Arg(10)->Unit(benchmark::kNanosecond);
BENCHMARK(BM_basic_slow)->Arg(100)->Unit(benchmark::kMicrosecond);
BENCHMARK(BM_basic_slow)->Arg(1000)->Unit(benchmark::kMillisecond);
BENCHMARK(BM_basic)->Range(1, 8);
BENCHMARK(BM_basic)->RangeMultiplier(2)->Range(1, 8);
BENCHMARK(BM_basic)->DenseRange(10, 15);
BENCHMARK(BM_basic)->Args({42, 42});
BENCHMARK(BM_basic)->Ranges({{64, 512}, {64, 512}});
BENCHMARK(BM_basic)->MinTime(0.7);
BENCHMARK(BM_basic)->UseRealTime();
BENCHMARK(BM_basic)->ThreadRange(2, 4);
BENCHMARK(BM_basic)->ThreadPerCpu();
BENCHMARK(BM_basic)->Repetitions(3);
void CustomArgs(benchmark::internal::Benchmark* b) {
for (int i = 0; i < 10; ++i) {
b->Arg(i);
}
}
BENCHMARK(BM_basic)->Apply(CustomArgs);
void BM_explicit_iteration_count(benchmark::State& state) {
// Test that benchmarks specified with an explicit iteration count are
// only run once.
static bool invoked_before = false;
assert(!invoked_before);
invoked_before = true;
// Test that the requested iteration count is respected.
assert(state.max_iterations == 42);
size_t actual_iterations = 0;
for (auto _ : state)
++actual_iterations;
assert(state.iterations() == state.max_iterations);
assert(state.iterations() == 42);
}
BENCHMARK(BM_explicit_iteration_count)->Iterations(42);
BENCHMARK_MAIN();

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#ifndef TEST_OUTPUT_TEST_H
#define TEST_OUTPUT_TEST_H
#undef NDEBUG
#include <initializer_list>
#include <memory>
#include <string>
#include <utility>
#include <vector>
#include <functional>
#include <sstream>
#include "../src/re.h"
#include "benchmark/benchmark.h"
#define CONCAT2(x, y) x##y
#define CONCAT(x, y) CONCAT2(x, y)
#define ADD_CASES(...) int CONCAT(dummy, __LINE__) = ::AddCases(__VA_ARGS__)
#define SET_SUBSTITUTIONS(...) \
int CONCAT(dummy, __LINE__) = ::SetSubstitutions(__VA_ARGS__)
enum MatchRules {
MR_Default, // Skip non-matching lines until a match is found.
MR_Next, // Match must occur on the next line.
MR_Not // No line between the current position and the next match matches
// the regex
};
struct TestCase {
TestCase(std::string re, int rule = MR_Default);
std::string regex_str;
int match_rule;
std::string substituted_regex;
std::shared_ptr<benchmark::Regex> regex;
};
enum TestCaseID {
TC_ConsoleOut,
TC_ConsoleErr,
TC_JSONOut,
TC_JSONErr,
TC_CSVOut,
TC_CSVErr,
TC_NumID // PRIVATE
};
// Add a list of test cases to be run against the output specified by
// 'ID'
int AddCases(TestCaseID ID, std::initializer_list<TestCase> il);
// Add or set a list of substitutions to be performed on constructed regex's
// See 'output_test_helper.cc' for a list of default substitutions.
int SetSubstitutions(
std::initializer_list<std::pair<std::string, std::string>> il);
// Run all output tests.
void RunOutputTests(int argc, char* argv[]);
// ========================================================================= //
// ------------------------- Results checking ------------------------------ //
// ========================================================================= //
// Call this macro to register a benchmark for checking its results. This
// should be all that's needed. It subscribes a function to check the (CSV)
// results of a benchmark. This is done only after verifying that the output
// strings are really as expected.
// bm_name_pattern: a name or a regex pattern which will be matched against
// all the benchmark names. Matching benchmarks
// will be the subject of a call to checker_function
// checker_function: should be of type ResultsCheckFn (see below)
#define CHECK_BENCHMARK_RESULTS(bm_name_pattern, checker_function) \
size_t CONCAT(dummy, __LINE__) = AddChecker(bm_name_pattern, checker_function)
struct Results;
typedef std::function< void(Results const&) > ResultsCheckFn;
size_t AddChecker(const char* bm_name_pattern, ResultsCheckFn fn);
// Class holding the results of a benchmark.
// It is passed in calls to checker functions.
struct Results {
// the benchmark name
std::string name;
// the benchmark fields
std::map< std::string, std::string > values;
Results(const std::string& n) : name(n) {}
int NumThreads() const;
typedef enum { kCpuTime, kRealTime } BenchmarkTime;
// get cpu_time or real_time in seconds
double GetTime(BenchmarkTime which) const;
// get the real_time duration of the benchmark in seconds.
// it is better to use fuzzy float checks for this, as the float
// ASCII formatting is lossy.
double DurationRealTime() const {
return GetAs< double >("iterations") * GetTime(kRealTime);
}
// get the cpu_time duration of the benchmark in seconds
double DurationCPUTime() const {
return GetAs< double >("iterations") * GetTime(kCpuTime);
}
// get the string for a result by name, or nullptr if the name
// is not found
const std::string* Get(const char* entry_name) const {
auto it = values.find(entry_name);
if(it == values.end()) return nullptr;
return &it->second;
}
// get a result by name, parsed as a specific type.
// NOTE: for counters, use GetCounterAs instead.
template <class T>
T GetAs(const char* entry_name) const;
// counters are written as doubles, so they have to be read first
// as a double, and only then converted to the asked type.
template <class T>
T GetCounterAs(const char* entry_name) const {
double dval = GetAs< double >(entry_name);
T tval = static_cast< T >(dval);
return tval;
}
};
template <class T>
T Results::GetAs(const char* entry_name) const {
auto *sv = Get(entry_name);
CHECK(sv != nullptr && !sv->empty());
std::stringstream ss;
ss << *sv;
T out;
ss >> out;
CHECK(!ss.fail());
return out;
}
//----------------------------------
// Macros to help in result checking. Do not use them with arguments causing
// side-effects.
#define _CHECK_RESULT_VALUE(entry, getfn, var_type, var_name, relationship, value) \
CONCAT(CHECK_, relationship) \
(entry.getfn< var_type >(var_name), (value)) << "\n" \
<< __FILE__ << ":" << __LINE__ << ": " << (entry).name << ":\n" \
<< __FILE__ << ":" << __LINE__ << ": " \
<< "expected (" << #var_type << ")" << (var_name) \
<< "=" << (entry).getfn< var_type >(var_name) \
<< " to be " #relationship " to " << (value) << "\n"
// check with tolerance. eps_factor is the tolerance window, which is
// interpreted relative to value (eg, 0.1 means 10% of value).
#define _CHECK_FLOAT_RESULT_VALUE(entry, getfn, var_type, var_name, relationship, value, eps_factor) \
CONCAT(CHECK_FLOAT_, relationship) \
(entry.getfn< var_type >(var_name), (value), (eps_factor) * (value)) << "\n" \
<< __FILE__ << ":" << __LINE__ << ": " << (entry).name << ":\n" \
<< __FILE__ << ":" << __LINE__ << ": " \
<< "expected (" << #var_type << ")" << (var_name) \
<< "=" << (entry).getfn< var_type >(var_name) \
<< " to be " #relationship " to " << (value) << "\n" \
<< __FILE__ << ":" << __LINE__ << ": " \
<< "with tolerance of " << (eps_factor) * (value) \
<< " (" << (eps_factor)*100. << "%), " \
<< "but delta was " << ((entry).getfn< var_type >(var_name) - (value)) \
<< " (" << (((entry).getfn< var_type >(var_name) - (value)) \
/ \
((value) > 1.e-5 || value < -1.e-5 ? value : 1.e-5)*100.) \
<< "%)"
#define CHECK_RESULT_VALUE(entry, var_type, var_name, relationship, value) \
_CHECK_RESULT_VALUE(entry, GetAs, var_type, var_name, relationship, value)
#define CHECK_COUNTER_VALUE(entry, var_type, var_name, relationship, value) \
_CHECK_RESULT_VALUE(entry, GetCounterAs, var_type, var_name, relationship, value)
#define CHECK_FLOAT_RESULT_VALUE(entry, var_name, relationship, value, eps_factor) \
_CHECK_FLOAT_RESULT_VALUE(entry, GetAs, double, var_name, relationship, value, eps_factor)
#define CHECK_FLOAT_COUNTER_VALUE(entry, var_name, relationship, value, eps_factor) \
_CHECK_FLOAT_RESULT_VALUE(entry, GetCounterAs, double, var_name, relationship, value, eps_factor)
// ========================================================================= //
// --------------------------- Misc Utilities ------------------------------ //
// ========================================================================= //
namespace {
const char* const dec_re = "[0-9]*[.]?[0-9]+([eE][-+][0-9]+)?";
} // end namespace
#endif // TEST_OUTPUT_TEST_H

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#include <iostream>
#include <map>
#include <memory>
#include <sstream>
#include <cstring>
#include "../src/check.h" // NOTE: check.h is for internal use only!
#include "../src/re.h" // NOTE: re.h is for internal use only
#include "output_test.h"
#include "../src/benchmark_api_internal.h"
// ========================================================================= //
// ------------------------------ Internals -------------------------------- //
// ========================================================================= //
namespace internal {
namespace {
using TestCaseList = std::vector<TestCase>;
// Use a vector because the order elements are added matters during iteration.
// std::map/unordered_map don't guarantee that.
// For example:
// SetSubstitutions({{"%HelloWorld", "Hello"}, {"%Hello", "Hi"}});
// Substitute("%HelloWorld") // Always expands to Hello.
using SubMap = std::vector<std::pair<std::string, std::string>>;
TestCaseList& GetTestCaseList(TestCaseID ID) {
// Uses function-local statics to ensure initialization occurs
// before first use.
static TestCaseList lists[TC_NumID];
return lists[ID];
}
SubMap& GetSubstitutions() {
// Don't use 'dec_re' from header because it may not yet be initialized.
static std::string safe_dec_re = "[0-9]*[.]?[0-9]+([eE][-+][0-9]+)?";
static SubMap map = {
{"%float", "[0-9]*[.]?[0-9]+([eE][-+][0-9]+)?"},
// human-readable float
{"%hrfloat", "[0-9]*[.]?[0-9]+([eE][-+][0-9]+)?[kMGTPEZYmunpfazy]?"},
{"%int", "[ ]*[0-9]+"},
{" %s ", "[ ]+"},
{"%time", "[ ]*[0-9]{1,6} ns"},
{"%console_report", "[ ]*[0-9]{1,6} ns [ ]*[0-9]{1,6} ns [ ]*[0-9]+"},
{"%console_us_report", "[ ]*[0-9] us [ ]*[0-9] us [ ]*[0-9]+"},
{"%csv_header",
"name,iterations,real_time,cpu_time,time_unit,bytes_per_second,"
"items_per_second,label,error_occurred,error_message"},
{"%csv_report", "[0-9]+," + safe_dec_re + "," + safe_dec_re + ",ns,,,,,"},
{"%csv_us_report", "[0-9]+," + safe_dec_re + "," + safe_dec_re + ",us,,,,,"},
{"%csv_bytes_report",
"[0-9]+," + safe_dec_re + "," + safe_dec_re + ",ns," + safe_dec_re + ",,,,"},
{"%csv_items_report",
"[0-9]+," + safe_dec_re + "," + safe_dec_re + ",ns,," + safe_dec_re + ",,,"},
{"%csv_bytes_items_report",
"[0-9]+," + safe_dec_re + "," + safe_dec_re + ",ns," + safe_dec_re +
"," + safe_dec_re + ",,,"},
{"%csv_label_report_begin", "[0-9]+," + safe_dec_re + "," + safe_dec_re + ",ns,,,"},
{"%csv_label_report_end", ",,"}};
return map;
}
std::string PerformSubstitutions(std::string source) {
SubMap const& subs = GetSubstitutions();
using SizeT = std::string::size_type;
for (auto const& KV : subs) {
SizeT pos;
SizeT next_start = 0;
while ((pos = source.find(KV.first, next_start)) != std::string::npos) {
next_start = pos + KV.second.size();
source.replace(pos, KV.first.size(), KV.second);
}
}
return source;
}
void CheckCase(std::stringstream& remaining_output, TestCase const& TC,
TestCaseList const& not_checks) {
std::string first_line;
bool on_first = true;
std::string line;
while (remaining_output.eof() == false) {
CHECK(remaining_output.good());
std::getline(remaining_output, line);
if (on_first) {
first_line = line;
on_first = false;
}
for (const auto& NC : not_checks) {
CHECK(!NC.regex->Match(line))
<< "Unexpected match for line \"" << line << "\" for MR_Not regex \""
<< NC.regex_str << "\""
<< "\n actual regex string \"" << TC.substituted_regex << "\""
<< "\n started matching near: " << first_line;
}
if (TC.regex->Match(line)) return;
CHECK(TC.match_rule != MR_Next)
<< "Expected line \"" << line << "\" to match regex \"" << TC.regex_str
<< "\""
<< "\n actual regex string \"" << TC.substituted_regex << "\""
<< "\n started matching near: " << first_line;
}
CHECK(remaining_output.eof() == false)
<< "End of output reached before match for regex \"" << TC.regex_str
<< "\" was found"
<< "\n actual regex string \"" << TC.substituted_regex << "\""
<< "\n started matching near: " << first_line;
}
void CheckCases(TestCaseList const& checks, std::stringstream& output) {
std::vector<TestCase> not_checks;
for (size_t i = 0; i < checks.size(); ++i) {
const auto& TC = checks[i];
if (TC.match_rule == MR_Not) {
not_checks.push_back(TC);
continue;
}
CheckCase(output, TC, not_checks);
not_checks.clear();
}
}
class TestReporter : public benchmark::BenchmarkReporter {
public:
TestReporter(std::vector<benchmark::BenchmarkReporter*> reps)
: reporters_(reps) {}
virtual bool ReportContext(const Context& context) {
bool last_ret = false;
bool first = true;
for (auto rep : reporters_) {
bool new_ret = rep->ReportContext(context);
CHECK(first || new_ret == last_ret)
<< "Reports return different values for ReportContext";
first = false;
last_ret = new_ret;
}
(void)first;
return last_ret;
}
void ReportRuns(const std::vector<Run>& report) {
for (auto rep : reporters_) rep->ReportRuns(report);
}
void Finalize() {
for (auto rep : reporters_) rep->Finalize();
}
private:
std::vector<benchmark::BenchmarkReporter *> reporters_;
};
}
} // end namespace internal
// ========================================================================= //
// -------------------------- Results checking ----------------------------- //
// ========================================================================= //
namespace internal {
// Utility class to manage subscribers for checking benchmark results.
// It works by parsing the CSV output to read the results.
class ResultsChecker {
public:
struct PatternAndFn : public TestCase { // reusing TestCase for its regexes
PatternAndFn(const std::string& rx, ResultsCheckFn fn_)
: TestCase(rx), fn(fn_) {}
ResultsCheckFn fn;
};
std::vector< PatternAndFn > check_patterns;
std::vector< Results > results;
std::vector< std::string > field_names;
void Add(const std::string& entry_pattern, ResultsCheckFn fn);
void CheckResults(std::stringstream& output);
private:
void SetHeader_(const std::string& csv_header);
void SetValues_(const std::string& entry_csv_line);
std::vector< std::string > SplitCsv_(const std::string& line);
};
// store the static ResultsChecker in a function to prevent initialization
// order problems
ResultsChecker& GetResultsChecker() {
static ResultsChecker rc;
return rc;
}
// add a results checker for a benchmark
void ResultsChecker::Add(const std::string& entry_pattern, ResultsCheckFn fn) {
check_patterns.emplace_back(entry_pattern, fn);
}
// check the results of all subscribed benchmarks
void ResultsChecker::CheckResults(std::stringstream& output) {
// first reset the stream to the start
{
auto start = std::ios::streampos(0);
// clear before calling tellg()
output.clear();
// seek to zero only when needed
if(output.tellg() > start) output.seekg(start);
// and just in case
output.clear();
}
// now go over every line and publish it to the ResultsChecker
std::string line;
bool on_first = true;
while (output.eof() == false) {
CHECK(output.good());
std::getline(output, line);
if (on_first) {
SetHeader_(line); // this is important
on_first = false;
continue;
}
SetValues_(line);
}
// finally we can call the subscribed check functions
for(const auto& p : check_patterns) {
VLOG(2) << "--------------------------------\n";
VLOG(2) << "checking for benchmarks matching " << p.regex_str << "...\n";
for(const auto& r : results) {
if(!p.regex->Match(r.name)) {
VLOG(2) << p.regex_str << " is not matched by " << r.name << "\n";
continue;
} else {
VLOG(2) << p.regex_str << " is matched by " << r.name << "\n";
}
VLOG(1) << "Checking results of " << r.name << ": ... \n";
p.fn(r);
VLOG(1) << "Checking results of " << r.name << ": OK.\n";
}
}
}
// prepare for the names in this header
void ResultsChecker::SetHeader_(const std::string& csv_header) {
field_names = SplitCsv_(csv_header);
}
// set the values for a benchmark
void ResultsChecker::SetValues_(const std::string& entry_csv_line) {
if(entry_csv_line.empty()) return; // some lines are empty
CHECK(!field_names.empty());
auto vals = SplitCsv_(entry_csv_line);
CHECK_EQ(vals.size(), field_names.size());
results.emplace_back(vals[0]); // vals[0] is the benchmark name
auto &entry = results.back();
for (size_t i = 1, e = vals.size(); i < e; ++i) {
entry.values[field_names[i]] = vals[i];
}
}
// a quick'n'dirty csv splitter (eliminating quotes)
std::vector< std::string > ResultsChecker::SplitCsv_(const std::string& line) {
std::vector< std::string > out;
if(line.empty()) return out;
if(!field_names.empty()) out.reserve(field_names.size());
size_t prev = 0, pos = line.find_first_of(','), curr = pos;
while(pos != line.npos) {
CHECK(curr > 0);
if(line[prev] == '"') ++prev;
if(line[curr-1] == '"') --curr;
out.push_back(line.substr(prev, curr-prev));
prev = pos + 1;
pos = line.find_first_of(',', pos + 1);
curr = pos;
}
curr = line.size();
if(line[prev] == '"') ++prev;
if(line[curr-1] == '"') --curr;
out.push_back(line.substr(prev, curr-prev));
return out;
}
} // end namespace internal
size_t AddChecker(const char* bm_name, ResultsCheckFn fn)
{
auto &rc = internal::GetResultsChecker();
rc.Add(bm_name, fn);
return rc.results.size();
}
int Results::NumThreads() const {
auto pos = name.find("/threads:");
if(pos == name.npos) return 1;
auto end = name.find('/', pos + 9);
std::stringstream ss;
ss << name.substr(pos + 9, end);
int num = 1;
ss >> num;
CHECK(!ss.fail());
return num;
}
double Results::GetTime(BenchmarkTime which) const {
CHECK(which == kCpuTime || which == kRealTime);
const char *which_str = which == kCpuTime ? "cpu_time" : "real_time";
double val = GetAs< double >(which_str);
auto unit = Get("time_unit");
CHECK(unit);
if(*unit == "ns") {
return val * 1.e-9;
} else if(*unit == "us") {
return val * 1.e-6;
} else if(*unit == "ms") {
return val * 1.e-3;
} else if(*unit == "s") {
return val;
} else {
CHECK(1 == 0) << "unknown time unit: " << *unit;
return 0;
}
}
// ========================================================================= //
// -------------------------- Public API Definitions------------------------ //
// ========================================================================= //
TestCase::TestCase(std::string re, int rule)
: regex_str(std::move(re)),
match_rule(rule),
substituted_regex(internal::PerformSubstitutions(regex_str)),
regex(std::make_shared<benchmark::Regex>()) {
std::string err_str;
regex->Init(substituted_regex,& err_str);
CHECK(err_str.empty()) << "Could not construct regex \"" << substituted_regex
<< "\""
<< "\n originally \"" << regex_str << "\""
<< "\n got error: " << err_str;
}
int AddCases(TestCaseID ID, std::initializer_list<TestCase> il) {
auto& L = internal::GetTestCaseList(ID);
L.insert(L.end(), il);
return 0;
}
int SetSubstitutions(
std::initializer_list<std::pair<std::string, std::string>> il) {
auto& subs = internal::GetSubstitutions();
for (auto KV : il) {
bool exists = false;
KV.second = internal::PerformSubstitutions(KV.second);
for (auto& EKV : subs) {
if (EKV.first == KV.first) {
EKV.second = std::move(KV.second);
exists = true;
break;
}
}
if (!exists) subs.push_back(std::move(KV));
}
return 0;
}
void RunOutputTests(int argc, char* argv[]) {
using internal::GetTestCaseList;
benchmark::Initialize(&argc, argv);
auto options = benchmark::internal::GetOutputOptions(/*force_no_color*/true);
benchmark::ConsoleReporter CR(options);
benchmark::JSONReporter JR;
benchmark::CSVReporter CSVR;
struct ReporterTest {
const char* name;
std::vector<TestCase>& output_cases;
std::vector<TestCase>& error_cases;
benchmark::BenchmarkReporter& reporter;
std::stringstream out_stream;
std::stringstream err_stream;
ReporterTest(const char* n, std::vector<TestCase>& out_tc,
std::vector<TestCase>& err_tc,
benchmark::BenchmarkReporter& br)
: name(n), output_cases(out_tc), error_cases(err_tc), reporter(br) {
reporter.SetOutputStream(&out_stream);
reporter.SetErrorStream(&err_stream);
}
} TestCases[] = {
{"ConsoleReporter", GetTestCaseList(TC_ConsoleOut),
GetTestCaseList(TC_ConsoleErr), CR},
{"JSONReporter", GetTestCaseList(TC_JSONOut), GetTestCaseList(TC_JSONErr),
JR},
{"CSVReporter", GetTestCaseList(TC_CSVOut), GetTestCaseList(TC_CSVErr),
CSVR},
};
// Create the test reporter and run the benchmarks.
std::cout << "Running benchmarks...\n";
internal::TestReporter test_rep({&CR, &JR, &CSVR});
benchmark::RunSpecifiedBenchmarks(&test_rep);
for (auto& rep_test : TestCases) {
std::string msg = std::string("\nTesting ") + rep_test.name + " Output\n";
std::string banner(msg.size() - 1, '-');
std::cout << banner << msg << banner << "\n";
std::cerr << rep_test.err_stream.str();
std::cout << rep_test.out_stream.str();
internal::CheckCases(rep_test.error_cases, rep_test.err_stream);
internal::CheckCases(rep_test.output_cases, rep_test.out_stream);
std::cout << "\n";
}
// now that we know the output is as expected, we can dispatch
// the checks to subscribees.
auto &csv = TestCases[2];
// would use == but gcc spits a warning
CHECK(std::strcmp(csv.name, "CSVReporter") == 0);
internal::GetResultsChecker().CheckResults(csv.out_stream);
}

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#undef NDEBUG
#include <cassert>
#include <vector>
#include "../src/check.h" // NOTE: check.h is for internal use only!
#include "benchmark/benchmark.h"
namespace {
class TestReporter : public benchmark::ConsoleReporter {
public:
virtual void ReportRuns(const std::vector<Run>& report) {
all_runs_.insert(all_runs_.end(), begin(report), end(report));
ConsoleReporter::ReportRuns(report);
}
std::vector<Run> all_runs_;
};
struct TestCase {
std::string name;
const char* label;
// Note: not explicit as we rely on it being converted through ADD_CASES.
TestCase(const char* xname) : TestCase(xname, nullptr) {}
TestCase(const char* xname, const char* xlabel)
: name(xname), label(xlabel) {}
typedef benchmark::BenchmarkReporter::Run Run;
void CheckRun(Run const& run) const {
CHECK(name == run.benchmark_name) << "expected " << name << " got "
<< run.benchmark_name;
if (label) {
CHECK(run.report_label == label) << "expected " << label << " got "
<< run.report_label;
} else {
CHECK(run.report_label == "");
}
}
};
std::vector<TestCase> ExpectedResults;
int AddCases(std::initializer_list<TestCase> const& v) {
for (auto N : v) {
ExpectedResults.push_back(N);
}
return 0;
}
#define CONCAT(x, y) CONCAT2(x, y)
#define CONCAT2(x, y) x##y
#define ADD_CASES(...) int CONCAT(dummy, __LINE__) = AddCases({__VA_ARGS__})
} // end namespace
typedef benchmark::internal::Benchmark* ReturnVal;
//----------------------------------------------------------------------------//
// Test RegisterBenchmark with no additional arguments
//----------------------------------------------------------------------------//
void BM_function(benchmark::State& state) {
for (auto _ : state) {
}
}
BENCHMARK(BM_function);
ReturnVal dummy = benchmark::RegisterBenchmark(
"BM_function_manual_registration", BM_function);
ADD_CASES({"BM_function"}, {"BM_function_manual_registration"});
//----------------------------------------------------------------------------//
// Test RegisterBenchmark with additional arguments
// Note: GCC <= 4.8 do not support this form of RegisterBenchmark because they
// reject the variadic pack expansion of lambda captures.
//----------------------------------------------------------------------------//
#ifndef BENCHMARK_HAS_NO_VARIADIC_REGISTER_BENCHMARK
void BM_extra_args(benchmark::State& st, const char* label) {
for (auto _ : st) {
}
st.SetLabel(label);
}
int RegisterFromFunction() {
std::pair<const char*, const char*> cases[] = {
{"test1", "One"}, {"test2", "Two"}, {"test3", "Three"}};
for (auto const& c : cases)
benchmark::RegisterBenchmark(c.first, &BM_extra_args, c.second);
return 0;
}
int dummy2 = RegisterFromFunction();
ADD_CASES({"test1", "One"}, {"test2", "Two"}, {"test3", "Three"});
#endif // BENCHMARK_HAS_NO_VARIADIC_REGISTER_BENCHMARK
//----------------------------------------------------------------------------//
// Test RegisterBenchmark with different callable types
//----------------------------------------------------------------------------//
struct CustomFixture {
void operator()(benchmark::State& st) {
for (auto _ : st) {
}
}
};
void TestRegistrationAtRuntime() {
#ifdef BENCHMARK_HAS_CXX11
{
CustomFixture fx;
benchmark::RegisterBenchmark("custom_fixture", fx);
AddCases({"custom_fixture"});
}
#endif
#ifndef BENCHMARK_HAS_NO_VARIADIC_REGISTER_BENCHMARK
{
const char* x = "42";
auto capturing_lam = [=](benchmark::State& st) {
for (auto _ : st) {
}
st.SetLabel(x);
};
benchmark::RegisterBenchmark("lambda_benchmark", capturing_lam);
AddCases({{"lambda_benchmark", x}});
}
#endif
}
// Test that all benchmarks, registered at either during static init or runtime,
// are run and the results are passed to the reported.
void RunTestOne() {
TestRegistrationAtRuntime();
TestReporter test_reporter;
benchmark::RunSpecifiedBenchmarks(&test_reporter);
typedef benchmark::BenchmarkReporter::Run Run;
auto EB = ExpectedResults.begin();
for (Run const& run : test_reporter.all_runs_) {
assert(EB != ExpectedResults.end());
EB->CheckRun(run);
++EB;
}
assert(EB == ExpectedResults.end());
}
// Test that ClearRegisteredBenchmarks() clears all previously registered
// benchmarks.
// Also test that new benchmarks can be registered and ran afterwards.
void RunTestTwo() {
assert(ExpectedResults.size() != 0 &&
"must have at least one registered benchmark");
ExpectedResults.clear();
benchmark::ClearRegisteredBenchmarks();
TestReporter test_reporter;
size_t num_ran = benchmark::RunSpecifiedBenchmarks(&test_reporter);
assert(num_ran == 0);
assert(test_reporter.all_runs_.begin() == test_reporter.all_runs_.end());
TestRegistrationAtRuntime();
num_ran = benchmark::RunSpecifiedBenchmarks(&test_reporter);
assert(num_ran == ExpectedResults.size());
typedef benchmark::BenchmarkReporter::Run Run;
auto EB = ExpectedResults.begin();
for (Run const& run : test_reporter.all_runs_) {
assert(EB != ExpectedResults.end());
EB->CheckRun(run);
++EB;
}
assert(EB == ExpectedResults.end());
}
int main(int argc, char* argv[]) {
benchmark::Initialize(&argc, argv);
RunTestOne();
RunTestTwo();
}

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#undef NDEBUG
#include <utility>
#include "benchmark/benchmark.h"
#include "output_test.h"
// ========================================================================= //
// ---------------------- Testing Prologue Output -------------------------- //
// ========================================================================= //
ADD_CASES(TC_ConsoleOut,
{{"^[-]+$", MR_Next},
{"^Benchmark %s Time %s CPU %s Iterations$", MR_Next},
{"^[-]+$", MR_Next}});
static int AddContextCases() {
AddCases(TC_ConsoleErr,
{
{"%int[-/]%int[-/]%int %int:%int:%int$", MR_Default},
{"Running .*/reporter_output_test(\\.exe)?$", MR_Next},
{"Run on \\(%int X %float MHz CPU s\\)", MR_Next},
});
AddCases(TC_JSONOut, {{"^\\{", MR_Default},
{"\"context\":", MR_Next},
{"\"date\": \"", MR_Next},
{"\"executable\": \".*/reporter_output_test(\\.exe)?\",", MR_Next},
{"\"num_cpus\": %int,$", MR_Next},
{"\"mhz_per_cpu\": %float,$", MR_Next},
{"\"cpu_scaling_enabled\": ", MR_Next},
{"\"caches\": \\[$", MR_Next}});
auto const& Caches = benchmark::CPUInfo::Get().caches;
if (!Caches.empty()) {
AddCases(TC_ConsoleErr, {{"CPU Caches:$", MR_Next}});
}
for (size_t I = 0; I < Caches.size(); ++I) {
std::string num_caches_str =
Caches[I].num_sharing != 0 ? " \\(x%int\\)$" : "$";
AddCases(
TC_ConsoleErr,
{{"L%int (Data|Instruction|Unified) %intK" + num_caches_str, MR_Next}});
AddCases(TC_JSONOut, {{"\\{$", MR_Next},
{"\"type\": \"", MR_Next},
{"\"level\": %int,$", MR_Next},
{"\"size\": %int,$", MR_Next},
{"\"num_sharing\": %int$", MR_Next},
{"}[,]{0,1}$", MR_Next}});
}
AddCases(TC_JSONOut, {{"],$"}});
return 0;
}
int dummy_register = AddContextCases();
ADD_CASES(TC_CSVOut, {{"%csv_header"}});
// ========================================================================= //
// ------------------------ Testing Basic Output --------------------------- //
// ========================================================================= //
void BM_basic(benchmark::State& state) {
for (auto _ : state) {
}
}
BENCHMARK(BM_basic);
ADD_CASES(TC_ConsoleOut, {{"^BM_basic %console_report$"}});
ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_basic\",$"},
{"\"iterations\": %int,$", MR_Next},
{"\"real_time\": %float,$", MR_Next},
{"\"cpu_time\": %float,$", MR_Next},
{"\"time_unit\": \"ns\"$", MR_Next},
{"}", MR_Next}});
ADD_CASES(TC_CSVOut, {{"^\"BM_basic\",%csv_report$"}});
// ========================================================================= //
// ------------------------ Testing Bytes per Second Output ---------------- //
// ========================================================================= //
void BM_bytes_per_second(benchmark::State& state) {
for (auto _ : state) {
}
state.SetBytesProcessed(1);
}
BENCHMARK(BM_bytes_per_second);
ADD_CASES(TC_ConsoleOut,
{{"^BM_bytes_per_second %console_report +%float[kM]{0,1}B/s$"}});
ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_bytes_per_second\",$"},
{"\"iterations\": %int,$", MR_Next},
{"\"real_time\": %float,$", MR_Next},
{"\"cpu_time\": %float,$", MR_Next},
{"\"time_unit\": \"ns\",$", MR_Next},
{"\"bytes_per_second\": %float$", MR_Next},
{"}", MR_Next}});
ADD_CASES(TC_CSVOut, {{"^\"BM_bytes_per_second\",%csv_bytes_report$"}});
// ========================================================================= //
// ------------------------ Testing Items per Second Output ---------------- //
// ========================================================================= //
void BM_items_per_second(benchmark::State& state) {
for (auto _ : state) {
}
state.SetItemsProcessed(1);
}
BENCHMARK(BM_items_per_second);
ADD_CASES(TC_ConsoleOut,
{{"^BM_items_per_second %console_report +%float[kM]{0,1} items/s$"}});
ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_items_per_second\",$"},
{"\"iterations\": %int,$", MR_Next},
{"\"real_time\": %float,$", MR_Next},
{"\"cpu_time\": %float,$", MR_Next},
{"\"time_unit\": \"ns\",$", MR_Next},
{"\"items_per_second\": %float$", MR_Next},
{"}", MR_Next}});
ADD_CASES(TC_CSVOut, {{"^\"BM_items_per_second\",%csv_items_report$"}});
// ========================================================================= //
// ------------------------ Testing Label Output --------------------------- //
// ========================================================================= //
void BM_label(benchmark::State& state) {
for (auto _ : state) {
}
state.SetLabel("some label");
}
BENCHMARK(BM_label);
ADD_CASES(TC_ConsoleOut, {{"^BM_label %console_report some label$"}});
ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_label\",$"},
{"\"iterations\": %int,$", MR_Next},
{"\"real_time\": %float,$", MR_Next},
{"\"cpu_time\": %float,$", MR_Next},
{"\"time_unit\": \"ns\",$", MR_Next},
{"\"label\": \"some label\"$", MR_Next},
{"}", MR_Next}});
ADD_CASES(TC_CSVOut, {{"^\"BM_label\",%csv_label_report_begin\"some "
"label\"%csv_label_report_end$"}});
// ========================================================================= //
// ------------------------ Testing Error Output --------------------------- //
// ========================================================================= //
void BM_error(benchmark::State& state) {
state.SkipWithError("message");
for (auto _ : state) {
}
}
BENCHMARK(BM_error);
ADD_CASES(TC_ConsoleOut, {{"^BM_error[ ]+ERROR OCCURRED: 'message'$"}});
ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_error\",$"},
{"\"error_occurred\": true,$", MR_Next},
{"\"error_message\": \"message\",$", MR_Next}});
ADD_CASES(TC_CSVOut, {{"^\"BM_error\",,,,,,,,true,\"message\"$"}});
// ========================================================================= //
// ------------------------ Testing No Arg Name Output -----------------------
// //
// ========================================================================= //
void BM_no_arg_name(benchmark::State& state) {
for (auto _ : state) {
}
}
BENCHMARK(BM_no_arg_name)->Arg(3);
ADD_CASES(TC_ConsoleOut, {{"^BM_no_arg_name/3 %console_report$"}});
ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_no_arg_name/3\",$"}});
ADD_CASES(TC_CSVOut, {{"^\"BM_no_arg_name/3\",%csv_report$"}});
// ========================================================================= //
// ------------------------ Testing Arg Name Output ----------------------- //
// ========================================================================= //
void BM_arg_name(benchmark::State& state) {
for (auto _ : state) {
}
}
BENCHMARK(BM_arg_name)->ArgName("first")->Arg(3);
ADD_CASES(TC_ConsoleOut, {{"^BM_arg_name/first:3 %console_report$"}});
ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_arg_name/first:3\",$"}});
ADD_CASES(TC_CSVOut, {{"^\"BM_arg_name/first:3\",%csv_report$"}});
// ========================================================================= //
// ------------------------ Testing Arg Names Output ----------------------- //
// ========================================================================= //
void BM_arg_names(benchmark::State& state) {
for (auto _ : state) {
}
}
BENCHMARK(BM_arg_names)->Args({2, 5, 4})->ArgNames({"first", "", "third"});
ADD_CASES(TC_ConsoleOut,
{{"^BM_arg_names/first:2/5/third:4 %console_report$"}});
ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_arg_names/first:2/5/third:4\",$"}});
ADD_CASES(TC_CSVOut, {{"^\"BM_arg_names/first:2/5/third:4\",%csv_report$"}});
// ========================================================================= //
// ----------------------- Testing Complexity Output ----------------------- //
// ========================================================================= //
void BM_Complexity_O1(benchmark::State& state) {
for (auto _ : state) {
}
state.SetComplexityN(state.range(0));
}
BENCHMARK(BM_Complexity_O1)->Range(1, 1 << 18)->Complexity(benchmark::o1);
SET_SUBSTITUTIONS({{"%bigOStr", "[ ]* %float \\([0-9]+\\)"},
{"%RMS", "[ ]*[0-9]+ %"}});
ADD_CASES(TC_ConsoleOut, {{"^BM_Complexity_O1_BigO %bigOStr %bigOStr[ ]*$"},
{"^BM_Complexity_O1_RMS %RMS %RMS[ ]*$"}});
// ========================================================================= //
// ----------------------- Testing Aggregate Output ------------------------ //
// ========================================================================= //
// Test that non-aggregate data is printed by default
void BM_Repeat(benchmark::State& state) {
for (auto _ : state) {
}
}
// need two repetitions min to be able to output any aggregate output
BENCHMARK(BM_Repeat)->Repetitions(2);
ADD_CASES(TC_ConsoleOut, {{"^BM_Repeat/repeats:2 %console_report$"},
{"^BM_Repeat/repeats:2 %console_report$"},
{"^BM_Repeat/repeats:2_mean %console_report$"},
{"^BM_Repeat/repeats:2_median %console_report$"},
{"^BM_Repeat/repeats:2_stddev %console_report$"}});
ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_Repeat/repeats:2\",$"},
{"\"name\": \"BM_Repeat/repeats:2\",$"},
{"\"name\": \"BM_Repeat/repeats:2_mean\",$"},
{"\"name\": \"BM_Repeat/repeats:2_median\",$"},
{"\"name\": \"BM_Repeat/repeats:2_stddev\",$"}});
ADD_CASES(TC_CSVOut, {{"^\"BM_Repeat/repeats:2\",%csv_report$"},
{"^\"BM_Repeat/repeats:2\",%csv_report$"},
{"^\"BM_Repeat/repeats:2_mean\",%csv_report$"},
{"^\"BM_Repeat/repeats:2_median\",%csv_report$"},
{"^\"BM_Repeat/repeats:2_stddev\",%csv_report$"}});
// but for two repetitions, mean and median is the same, so let's repeat..
BENCHMARK(BM_Repeat)->Repetitions(3);
ADD_CASES(TC_ConsoleOut, {{"^BM_Repeat/repeats:3 %console_report$"},
{"^BM_Repeat/repeats:3 %console_report$"},
{"^BM_Repeat/repeats:3 %console_report$"},
{"^BM_Repeat/repeats:3_mean %console_report$"},
{"^BM_Repeat/repeats:3_median %console_report$"},
{"^BM_Repeat/repeats:3_stddev %console_report$"}});
ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_Repeat/repeats:3\",$"},
{"\"name\": \"BM_Repeat/repeats:3\",$"},
{"\"name\": \"BM_Repeat/repeats:3\",$"},
{"\"name\": \"BM_Repeat/repeats:3_mean\",$"},
{"\"name\": \"BM_Repeat/repeats:3_median\",$"},
{"\"name\": \"BM_Repeat/repeats:3_stddev\",$"}});
ADD_CASES(TC_CSVOut, {{"^\"BM_Repeat/repeats:3\",%csv_report$"},
{"^\"BM_Repeat/repeats:3\",%csv_report$"},
{"^\"BM_Repeat/repeats:3\",%csv_report$"},
{"^\"BM_Repeat/repeats:3_mean\",%csv_report$"},
{"^\"BM_Repeat/repeats:3_median\",%csv_report$"},
{"^\"BM_Repeat/repeats:3_stddev\",%csv_report$"}});
// median differs between even/odd number of repetitions, so just to be sure
BENCHMARK(BM_Repeat)->Repetitions(4);
ADD_CASES(TC_ConsoleOut, {{"^BM_Repeat/repeats:4 %console_report$"},
{"^BM_Repeat/repeats:4 %console_report$"},
{"^BM_Repeat/repeats:4 %console_report$"},
{"^BM_Repeat/repeats:4 %console_report$"},
{"^BM_Repeat/repeats:4_mean %console_report$"},
{"^BM_Repeat/repeats:4_median %console_report$"},
{"^BM_Repeat/repeats:4_stddev %console_report$"}});
ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_Repeat/repeats:4\",$"},
{"\"name\": \"BM_Repeat/repeats:4\",$"},
{"\"name\": \"BM_Repeat/repeats:4\",$"},
{"\"name\": \"BM_Repeat/repeats:4\",$"},
{"\"name\": \"BM_Repeat/repeats:4_mean\",$"},
{"\"name\": \"BM_Repeat/repeats:4_median\",$"},
{"\"name\": \"BM_Repeat/repeats:4_stddev\",$"}});
ADD_CASES(TC_CSVOut, {{"^\"BM_Repeat/repeats:4\",%csv_report$"},
{"^\"BM_Repeat/repeats:4\",%csv_report$"},
{"^\"BM_Repeat/repeats:4\",%csv_report$"},
{"^\"BM_Repeat/repeats:4\",%csv_report$"},
{"^\"BM_Repeat/repeats:4_mean\",%csv_report$"},
{"^\"BM_Repeat/repeats:4_median\",%csv_report$"},
{"^\"BM_Repeat/repeats:4_stddev\",%csv_report$"}});
// Test that a non-repeated test still prints non-aggregate results even when
// only-aggregate reports have been requested
void BM_RepeatOnce(benchmark::State& state) {
for (auto _ : state) {
}
}
BENCHMARK(BM_RepeatOnce)->Repetitions(1)->ReportAggregatesOnly();
ADD_CASES(TC_ConsoleOut, {{"^BM_RepeatOnce/repeats:1 %console_report$"}});
ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_RepeatOnce/repeats:1\",$"}});
ADD_CASES(TC_CSVOut, {{"^\"BM_RepeatOnce/repeats:1\",%csv_report$"}});
// Test that non-aggregate data is not reported
void BM_SummaryRepeat(benchmark::State& state) {
for (auto _ : state) {
}
}
BENCHMARK(BM_SummaryRepeat)->Repetitions(3)->ReportAggregatesOnly();
ADD_CASES(TC_ConsoleOut,
{{".*BM_SummaryRepeat/repeats:3 ", MR_Not},
{"^BM_SummaryRepeat/repeats:3_mean %console_report$"},
{"^BM_SummaryRepeat/repeats:3_median %console_report$"},
{"^BM_SummaryRepeat/repeats:3_stddev %console_report$"}});
ADD_CASES(TC_JSONOut, {{".*BM_SummaryRepeat/repeats:3 ", MR_Not},
{"\"name\": \"BM_SummaryRepeat/repeats:3_mean\",$"},
{"\"name\": \"BM_SummaryRepeat/repeats:3_median\",$"},
{"\"name\": \"BM_SummaryRepeat/repeats:3_stddev\",$"}});
ADD_CASES(TC_CSVOut, {{".*BM_SummaryRepeat/repeats:3 ", MR_Not},
{"^\"BM_SummaryRepeat/repeats:3_mean\",%csv_report$"},
{"^\"BM_SummaryRepeat/repeats:3_median\",%csv_report$"},
{"^\"BM_SummaryRepeat/repeats:3_stddev\",%csv_report$"}});
void BM_RepeatTimeUnit(benchmark::State& state) {
for (auto _ : state) {
}
}
BENCHMARK(BM_RepeatTimeUnit)
->Repetitions(3)
->ReportAggregatesOnly()
->Unit(benchmark::kMicrosecond);
ADD_CASES(TC_ConsoleOut,
{{".*BM_RepeatTimeUnit/repeats:3 ", MR_Not},
{"^BM_RepeatTimeUnit/repeats:3_mean %console_us_report$"},
{"^BM_RepeatTimeUnit/repeats:3_median %console_us_report$"},
{"^BM_RepeatTimeUnit/repeats:3_stddev %console_us_report$"}});
ADD_CASES(TC_JSONOut, {{".*BM_RepeatTimeUnit/repeats:3 ", MR_Not},
{"\"name\": \"BM_RepeatTimeUnit/repeats:3_mean\",$"},
{"\"time_unit\": \"us\",?$"},
{"\"name\": \"BM_RepeatTimeUnit/repeats:3_median\",$"},
{"\"time_unit\": \"us\",?$"},
{"\"name\": \"BM_RepeatTimeUnit/repeats:3_stddev\",$"},
{"\"time_unit\": \"us\",?$"}});
ADD_CASES(TC_CSVOut,
{{".*BM_RepeatTimeUnit/repeats:3 ", MR_Not},
{"^\"BM_RepeatTimeUnit/repeats:3_mean\",%csv_us_report$"},
{"^\"BM_RepeatTimeUnit/repeats:3_median\",%csv_us_report$"},
{"^\"BM_RepeatTimeUnit/repeats:3_stddev\",%csv_us_report$"}});
// ========================================================================= //
// -------------------- Testing user-provided statistics ------------------- //
// ========================================================================= //
const auto UserStatistics = [](const std::vector<double>& v) {
return v.back();
};
void BM_UserStats(benchmark::State& state) {
for (auto _ : state) {
}
}
BENCHMARK(BM_UserStats)
->Repetitions(3)
->ComputeStatistics("", UserStatistics);
// check that user-provided stats is calculated, and is after the default-ones
// empty string as name is intentional, it would sort before anything else
ADD_CASES(TC_ConsoleOut, {{"^BM_UserStats/repeats:3 %console_report$"},
{"^BM_UserStats/repeats:3 %console_report$"},
{"^BM_UserStats/repeats:3 %console_report$"},
{"^BM_UserStats/repeats:3_mean %console_report$"},
{"^BM_UserStats/repeats:3_median %console_report$"},
{"^BM_UserStats/repeats:3_stddev %console_report$"},
{"^BM_UserStats/repeats:3_ %console_report$"}});
ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_UserStats/repeats:3\",$"},
{"\"name\": \"BM_UserStats/repeats:3\",$"},
{"\"name\": \"BM_UserStats/repeats:3\",$"},
{"\"name\": \"BM_UserStats/repeats:3_mean\",$"},
{"\"name\": \"BM_UserStats/repeats:3_median\",$"},
{"\"name\": \"BM_UserStats/repeats:3_stddev\",$"},
{"\"name\": \"BM_UserStats/repeats:3_\",$"}});
ADD_CASES(TC_CSVOut, {{"^\"BM_UserStats/repeats:3\",%csv_report$"},
{"^\"BM_UserStats/repeats:3\",%csv_report$"},
{"^\"BM_UserStats/repeats:3\",%csv_report$"},
{"^\"BM_UserStats/repeats:3_mean\",%csv_report$"},
{"^\"BM_UserStats/repeats:3_median\",%csv_report$"},
{"^\"BM_UserStats/repeats:3_stddev\",%csv_report$"},
{"^\"BM_UserStats/repeats:3_\",%csv_report$"}});
// ========================================================================= //
// --------------------------- TEST CASES END ------------------------------ //
// ========================================================================= //
int main(int argc, char* argv[]) { RunOutputTests(argc, argv); }

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#undef NDEBUG
#include <cassert>
#include <vector>
#include "../src/check.h" // NOTE: check.h is for internal use only!
#include "benchmark/benchmark.h"
namespace {
class TestReporter : public benchmark::ConsoleReporter {
public:
virtual bool ReportContext(const Context& context) {
return ConsoleReporter::ReportContext(context);
};
virtual void ReportRuns(const std::vector<Run>& report) {
all_runs_.insert(all_runs_.end(), begin(report), end(report));
ConsoleReporter::ReportRuns(report);
}
TestReporter() {}
virtual ~TestReporter() {}
mutable std::vector<Run> all_runs_;
};
struct TestCase {
std::string name;
bool error_occurred;
std::string error_message;
typedef benchmark::BenchmarkReporter::Run Run;
void CheckRun(Run const& run) const {
CHECK(name == run.benchmark_name) << "expected " << name << " got "
<< run.benchmark_name;
CHECK(error_occurred == run.error_occurred);
CHECK(error_message == run.error_message);
if (error_occurred) {
// CHECK(run.iterations == 0);
} else {
CHECK(run.iterations != 0);
}
}
};
std::vector<TestCase> ExpectedResults;
int AddCases(const char* base_name, std::initializer_list<TestCase> const& v) {
for (auto TC : v) {
TC.name = base_name + TC.name;
ExpectedResults.push_back(std::move(TC));
}
return 0;
}
#define CONCAT(x, y) CONCAT2(x, y)
#define CONCAT2(x, y) x##y
#define ADD_CASES(...) int CONCAT(dummy, __LINE__) = AddCases(__VA_ARGS__)
} // end namespace
void BM_error_before_running(benchmark::State& state) {
state.SkipWithError("error message");
while (state.KeepRunning()) {
assert(false);
}
}
BENCHMARK(BM_error_before_running);
ADD_CASES("BM_error_before_running", {{"", true, "error message"}});
void BM_error_before_running_batch(benchmark::State& state) {
state.SkipWithError("error message");
while (state.KeepRunningBatch(17)) {
assert(false);
}
}
BENCHMARK(BM_error_before_running_batch);
ADD_CASES("BM_error_before_running_batch", {{"", true, "error message"}});
void BM_error_before_running_range_for(benchmark::State& state) {
state.SkipWithError("error message");
for (auto _ : state) {
assert(false);
}
}
BENCHMARK(BM_error_before_running_range_for);
ADD_CASES("BM_error_before_running_range_for", {{"", true, "error message"}});
void BM_error_during_running(benchmark::State& state) {
int first_iter = true;
while (state.KeepRunning()) {
if (state.range(0) == 1 && state.thread_index <= (state.threads / 2)) {
assert(first_iter);
first_iter = false;
state.SkipWithError("error message");
} else {
state.PauseTiming();
state.ResumeTiming();
}
}
}
BENCHMARK(BM_error_during_running)->Arg(1)->Arg(2)->ThreadRange(1, 8);
ADD_CASES("BM_error_during_running", {{"/1/threads:1", true, "error message"},
{"/1/threads:2", true, "error message"},
{"/1/threads:4", true, "error message"},
{"/1/threads:8", true, "error message"},
{"/2/threads:1", false, ""},
{"/2/threads:2", false, ""},
{"/2/threads:4", false, ""},
{"/2/threads:8", false, ""}});
void BM_error_during_running_ranged_for(benchmark::State& state) {
assert(state.max_iterations > 3 && "test requires at least a few iterations");
int first_iter = true;
// NOTE: Users should not write the for loop explicitly.
for (auto It = state.begin(), End = state.end(); It != End; ++It) {
if (state.range(0) == 1) {
assert(first_iter);
first_iter = false;
state.SkipWithError("error message");
// Test the unfortunate but documented behavior that the ranged-for loop
// doesn't automatically terminate when SkipWithError is set.
assert(++It != End);
break; // Required behavior
}
}
}
BENCHMARK(BM_error_during_running_ranged_for)->Arg(1)->Arg(2)->Iterations(5);
ADD_CASES("BM_error_during_running_ranged_for",
{{"/1/iterations:5", true, "error message"},
{"/2/iterations:5", false, ""}});
void BM_error_after_running(benchmark::State& state) {
for (auto _ : state) {
benchmark::DoNotOptimize(state.iterations());
}
if (state.thread_index <= (state.threads / 2))
state.SkipWithError("error message");
}
BENCHMARK(BM_error_after_running)->ThreadRange(1, 8);
ADD_CASES("BM_error_after_running", {{"/threads:1", true, "error message"},
{"/threads:2", true, "error message"},
{"/threads:4", true, "error message"},
{"/threads:8", true, "error message"}});
void BM_error_while_paused(benchmark::State& state) {
bool first_iter = true;
while (state.KeepRunning()) {
if (state.range(0) == 1 && state.thread_index <= (state.threads / 2)) {
assert(first_iter);
first_iter = false;
state.PauseTiming();
state.SkipWithError("error message");
} else {
state.PauseTiming();
state.ResumeTiming();
}
}
}
BENCHMARK(BM_error_while_paused)->Arg(1)->Arg(2)->ThreadRange(1, 8);
ADD_CASES("BM_error_while_paused", {{"/1/threads:1", true, "error message"},
{"/1/threads:2", true, "error message"},
{"/1/threads:4", true, "error message"},
{"/1/threads:8", true, "error message"},
{"/2/threads:1", false, ""},
{"/2/threads:2", false, ""},
{"/2/threads:4", false, ""},
{"/2/threads:8", false, ""}});
int main(int argc, char* argv[]) {
benchmark::Initialize(&argc, argv);
TestReporter test_reporter;
benchmark::RunSpecifiedBenchmarks(&test_reporter);
typedef benchmark::BenchmarkReporter::Run Run;
auto EB = ExpectedResults.begin();
for (Run const& run : test_reporter.all_runs_) {
assert(EB != ExpectedResults.end());
EB->CheckRun(run);
++EB;
}
assert(EB == ExpectedResults.end());
return 0;
}

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#include <benchmark/benchmark.h>
#ifdef __clang__
#pragma clang diagnostic ignored "-Wreturn-type"
#endif
extern "C" {
extern int ExternInt;
benchmark::State& GetState();
void Fn();
}
using benchmark::State;
// CHECK-LABEL: test_for_auto_loop:
extern "C" int test_for_auto_loop() {
State& S = GetState();
int x = 42;
// CHECK: [[CALL:call(q)*]] _ZN9benchmark5State16StartKeepRunningEv
// CHECK-NEXT: testq %rbx, %rbx
// CHECK-NEXT: je [[LOOP_END:.*]]
for (auto _ : S) {
// CHECK: .L[[LOOP_HEAD:[a-zA-Z0-9_]+]]:
// CHECK-GNU-NEXT: subq $1, %rbx
// CHECK-CLANG-NEXT: {{(addq \$1,|incq)}} %rax
// CHECK-NEXT: jne .L[[LOOP_HEAD]]
benchmark::DoNotOptimize(x);
}
// CHECK: [[LOOP_END]]:
// CHECK: [[CALL]] _ZN9benchmark5State17FinishKeepRunningEv
// CHECK: movl $101, %eax
// CHECK: ret
return 101;
}
// CHECK-LABEL: test_while_loop:
extern "C" int test_while_loop() {
State& S = GetState();
int x = 42;
// CHECK: j{{(e|mp)}} .L[[LOOP_HEADER:[a-zA-Z0-9_]+]]
// CHECK-NEXT: .L[[LOOP_BODY:[a-zA-Z0-9_]+]]:
while (S.KeepRunning()) {
// CHECK-GNU-NEXT: subq $1, %[[IREG:[a-z]+]]
// CHECK-CLANG-NEXT: {{(addq \$-1,|decq)}} %[[IREG:[a-z]+]]
// CHECK: movq %[[IREG]], [[DEST:.*]]
benchmark::DoNotOptimize(x);
}
// CHECK-DAG: movq [[DEST]], %[[IREG]]
// CHECK-DAG: testq %[[IREG]], %[[IREG]]
// CHECK-DAG: jne .L[[LOOP_BODY]]
// CHECK-DAG: .L[[LOOP_HEADER]]:
// CHECK: cmpb $0
// CHECK-NEXT: jne .L[[LOOP_END:[a-zA-Z0-9_]+]]
// CHECK: [[CALL:call(q)*]] _ZN9benchmark5State16StartKeepRunningEv
// CHECK: .L[[LOOP_END]]:
// CHECK: [[CALL]] _ZN9benchmark5State17FinishKeepRunningEv
// CHECK: movl $101, %eax
// CHECK: ret
return 101;
}

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//===---------------------------------------------------------------------===//
// statistics_test - Unit tests for src/statistics.cc
//===---------------------------------------------------------------------===//
#include "../src/statistics.h"
#include "gtest/gtest.h"
namespace {
TEST(StatisticsTest, Mean) {
std::vector<double> Inputs;
{
Inputs = {42, 42, 42, 42};
double Res = benchmark::StatisticsMean(Inputs);
EXPECT_DOUBLE_EQ(Res, 42.0);
}
{
Inputs = {1, 2, 3, 4};
double Res = benchmark::StatisticsMean(Inputs);
EXPECT_DOUBLE_EQ(Res, 2.5);
}
{
Inputs = {1, 2, 5, 10, 10, 14};
double Res = benchmark::StatisticsMean(Inputs);
EXPECT_DOUBLE_EQ(Res, 7.0);
}
}
TEST(StatisticsTest, Median) {
std::vector<double> Inputs;
{
Inputs = {42, 42, 42, 42};
double Res = benchmark::StatisticsMedian(Inputs);
EXPECT_DOUBLE_EQ(Res, 42.0);
}
{
Inputs = {1, 2, 3, 4};
double Res = benchmark::StatisticsMedian(Inputs);
EXPECT_DOUBLE_EQ(Res, 2.5);
}
{
Inputs = {1, 2, 5, 10, 10};
double Res = benchmark::StatisticsMedian(Inputs);
EXPECT_DOUBLE_EQ(Res, 5.0);
}
}
TEST(StatisticsTest, StdDev) {
std::vector<double> Inputs;
{
Inputs = {101, 101, 101, 101};
double Res = benchmark::StatisticsStdDev(Inputs);
EXPECT_DOUBLE_EQ(Res, 0.0);
}
{
Inputs = {1, 2, 3};
double Res = benchmark::StatisticsStdDev(Inputs);
EXPECT_DOUBLE_EQ(Res, 1.0);
}
}
} // end namespace

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utils/benchmark/test/templated_fixture_test.cc Normal file
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#include "benchmark/benchmark.h"
#include <cassert>
#include <memory>
template<typename T>
class MyFixture : public ::benchmark::Fixture {
public:
MyFixture() : data(0) {}
T data;
};
BENCHMARK_TEMPLATE_F(MyFixture, Foo, int)(benchmark::State &st) {
for (auto _ : st) {
data += 1;
}
}
BENCHMARK_TEMPLATE_DEFINE_F(MyFixture, Bar, double)(benchmark::State& st) {
for (auto _ : st) {
data += 1.0;
}
}
BENCHMARK_REGISTER_F(MyFixture, Bar);
BENCHMARK_MAIN();

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utils/benchmark/test/user_counters_tabular_test.cc Normal file
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#undef NDEBUG
#include "benchmark/benchmark.h"
#include "output_test.h"
// @todo: <jpmag> this checks the full output at once; the rule for
// CounterSet1 was failing because it was not matching "^[-]+$".
// @todo: <jpmag> check that the counters are vertically aligned.
ADD_CASES(TC_ConsoleOut, {
// keeping these lines long improves readability, so:
// clang-format off
{"^[-]+$", MR_Next},
{"^Benchmark %s Time %s CPU %s Iterations %s Bar %s Bat %s Baz %s Foo %s Frob %s Lob$", MR_Next},
{"^[-]+$", MR_Next},
{"^BM_Counters_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
{"^BM_Counters_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
{"^BM_Counters_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
{"^BM_Counters_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
{"^BM_Counters_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
{"^BM_CounterRates_Tabular/threads:%int %console_report [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s$", MR_Next},
{"^BM_CounterRates_Tabular/threads:%int %console_report [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s$", MR_Next},
{"^BM_CounterRates_Tabular/threads:%int %console_report [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s$", MR_Next},
{"^BM_CounterRates_Tabular/threads:%int %console_report [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s$", MR_Next},
{"^BM_CounterRates_Tabular/threads:%int %console_report [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s$", MR_Next},
{"^[-]+$", MR_Next},
{"^Benchmark %s Time %s CPU %s Iterations %s Bar %s Baz %s Foo$", MR_Next},
{"^[-]+$", MR_Next},
{"^BM_CounterSet0_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
{"^BM_CounterSet0_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
{"^BM_CounterSet0_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
{"^BM_CounterSet0_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
{"^BM_CounterSet0_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
{"^BM_CounterSet1_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
{"^BM_CounterSet1_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
{"^BM_CounterSet1_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
{"^BM_CounterSet1_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
{"^BM_CounterSet1_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
{"^[-]+$", MR_Next},
{"^Benchmark %s Time %s CPU %s Iterations %s Bat %s Baz %s Foo$", MR_Next},
{"^[-]+$", MR_Next},
{"^BM_CounterSet2_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
{"^BM_CounterSet2_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
{"^BM_CounterSet2_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
{"^BM_CounterSet2_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
{"^BM_CounterSet2_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$"},
// clang-format on
});
ADD_CASES(TC_CSVOut, {{"%csv_header,"
"\"Bar\",\"Bat\",\"Baz\",\"Foo\",\"Frob\",\"Lob\""}});
// ========================================================================= //
// ------------------------- Tabular Counters Output ----------------------- //
// ========================================================================= //
void BM_Counters_Tabular(benchmark::State& state) {
for (auto _ : state) {
}
namespace bm = benchmark;
state.counters.insert({
{"Foo", { 1, bm::Counter::kAvgThreads}},
{"Bar", { 2, bm::Counter::kAvgThreads}},
{"Baz", { 4, bm::Counter::kAvgThreads}},
{"Bat", { 8, bm::Counter::kAvgThreads}},
{"Frob", {16, bm::Counter::kAvgThreads}},
{"Lob", {32, bm::Counter::kAvgThreads}},
});
}
BENCHMARK(BM_Counters_Tabular)->ThreadRange(1, 16);
ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_Counters_Tabular/threads:%int\",$"},
{"\"iterations\": %int,$", MR_Next},
{"\"real_time\": %float,$", MR_Next},
{"\"cpu_time\": %float,$", MR_Next},
{"\"time_unit\": \"ns\",$", MR_Next},
{"\"Bar\": %float,$", MR_Next},
{"\"Bat\": %float,$", MR_Next},
{"\"Baz\": %float,$", MR_Next},
{"\"Foo\": %float,$", MR_Next},
{"\"Frob\": %float,$", MR_Next},
{"\"Lob\": %float$", MR_Next},
{"}", MR_Next}});
ADD_CASES(TC_CSVOut, {{"^\"BM_Counters_Tabular/threads:%int\",%csv_report,"
"%float,%float,%float,%float,%float,%float$"}});
// VS2013 does not allow this function to be passed as a lambda argument
// to CHECK_BENCHMARK_RESULTS()
void CheckTabular(Results const& e) {
CHECK_COUNTER_VALUE(e, int, "Foo", EQ, 1);
CHECK_COUNTER_VALUE(e, int, "Bar", EQ, 2);
CHECK_COUNTER_VALUE(e, int, "Baz", EQ, 4);
CHECK_COUNTER_VALUE(e, int, "Bat", EQ, 8);
CHECK_COUNTER_VALUE(e, int, "Frob", EQ, 16);
CHECK_COUNTER_VALUE(e, int, "Lob", EQ, 32);
}
CHECK_BENCHMARK_RESULTS("BM_Counters_Tabular/threads:%int", &CheckTabular);
// ========================================================================= //
// -------------------- Tabular+Rate Counters Output ----------------------- //
// ========================================================================= //
void BM_CounterRates_Tabular(benchmark::State& state) {
for (auto _ : state) {
}
namespace bm = benchmark;
state.counters.insert({
{"Foo", { 1, bm::Counter::kAvgThreadsRate}},
{"Bar", { 2, bm::Counter::kAvgThreadsRate}},
{"Baz", { 4, bm::Counter::kAvgThreadsRate}},
{"Bat", { 8, bm::Counter::kAvgThreadsRate}},
{"Frob", {16, bm::Counter::kAvgThreadsRate}},
{"Lob", {32, bm::Counter::kAvgThreadsRate}},
});
}
BENCHMARK(BM_CounterRates_Tabular)->ThreadRange(1, 16);
ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_CounterRates_Tabular/threads:%int\",$"},
{"\"iterations\": %int,$", MR_Next},
{"\"real_time\": %float,$", MR_Next},
{"\"cpu_time\": %float,$", MR_Next},
{"\"time_unit\": \"ns\",$", MR_Next},
{"\"Bar\": %float,$", MR_Next},
{"\"Bat\": %float,$", MR_Next},
{"\"Baz\": %float,$", MR_Next},
{"\"Foo\": %float,$", MR_Next},
{"\"Frob\": %float,$", MR_Next},
{"\"Lob\": %float$", MR_Next},
{"}", MR_Next}});
ADD_CASES(TC_CSVOut, {{"^\"BM_CounterRates_Tabular/threads:%int\",%csv_report,"
"%float,%float,%float,%float,%float,%float$"}});
// VS2013 does not allow this function to be passed as a lambda argument
// to CHECK_BENCHMARK_RESULTS()
void CheckTabularRate(Results const& e) {
double t = e.DurationCPUTime();
CHECK_FLOAT_COUNTER_VALUE(e, "Foo", EQ, 1./t, 0.001);
CHECK_FLOAT_COUNTER_VALUE(e, "Bar", EQ, 2./t, 0.001);
CHECK_FLOAT_COUNTER_VALUE(e, "Baz", EQ, 4./t, 0.001);
CHECK_FLOAT_COUNTER_VALUE(e, "Bat", EQ, 8./t, 0.001);
CHECK_FLOAT_COUNTER_VALUE(e, "Frob", EQ, 16./t, 0.001);
CHECK_FLOAT_COUNTER_VALUE(e, "Lob", EQ, 32./t, 0.001);
}
CHECK_BENCHMARK_RESULTS("BM_CounterRates_Tabular/threads:%int",
&CheckTabularRate);
// ========================================================================= //
// ------------------------- Tabular Counters Output ----------------------- //
// ========================================================================= //
// set only some of the counters
void BM_CounterSet0_Tabular(benchmark::State& state) {
for (auto _ : state) {
}
namespace bm = benchmark;
state.counters.insert({
{"Foo", {10, bm::Counter::kAvgThreads}},
{"Bar", {20, bm::Counter::kAvgThreads}},
{"Baz", {40, bm::Counter::kAvgThreads}},
});
}
BENCHMARK(BM_CounterSet0_Tabular)->ThreadRange(1, 16);
ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_CounterSet0_Tabular/threads:%int\",$"},
{"\"iterations\": %int,$", MR_Next},
{"\"real_time\": %float,$", MR_Next},
{"\"cpu_time\": %float,$", MR_Next},
{"\"time_unit\": \"ns\",$", MR_Next},
{"\"Bar\": %float,$", MR_Next},
{"\"Baz\": %float,$", MR_Next},
{"\"Foo\": %float$", MR_Next},
{"}", MR_Next}});
ADD_CASES(TC_CSVOut, {{"^\"BM_CounterSet0_Tabular/threads:%int\",%csv_report,"
"%float,,%float,%float,,"}});
// VS2013 does not allow this function to be passed as a lambda argument
// to CHECK_BENCHMARK_RESULTS()
void CheckSet0(Results const& e) {
CHECK_COUNTER_VALUE(e, int, "Foo", EQ, 10);
CHECK_COUNTER_VALUE(e, int, "Bar", EQ, 20);
CHECK_COUNTER_VALUE(e, int, "Baz", EQ, 40);
}
CHECK_BENCHMARK_RESULTS("BM_CounterSet0_Tabular", &CheckSet0);
// again.
void BM_CounterSet1_Tabular(benchmark::State& state) {
for (auto _ : state) {
}
namespace bm = benchmark;
state.counters.insert({
{"Foo", {15, bm::Counter::kAvgThreads}},
{"Bar", {25, bm::Counter::kAvgThreads}},
{"Baz", {45, bm::Counter::kAvgThreads}},
});
}
BENCHMARK(BM_CounterSet1_Tabular)->ThreadRange(1, 16);
ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_CounterSet1_Tabular/threads:%int\",$"},
{"\"iterations\": %int,$", MR_Next},
{"\"real_time\": %float,$", MR_Next},
{"\"cpu_time\": %float,$", MR_Next},
{"\"time_unit\": \"ns\",$", MR_Next},
{"\"Bar\": %float,$", MR_Next},
{"\"Baz\": %float,$", MR_Next},
{"\"Foo\": %float$", MR_Next},
{"}", MR_Next}});
ADD_CASES(TC_CSVOut, {{"^\"BM_CounterSet1_Tabular/threads:%int\",%csv_report,"
"%float,,%float,%float,,"}});
// VS2013 does not allow this function to be passed as a lambda argument
// to CHECK_BENCHMARK_RESULTS()
void CheckSet1(Results const& e) {
CHECK_COUNTER_VALUE(e, int, "Foo", EQ, 15);
CHECK_COUNTER_VALUE(e, int, "Bar", EQ, 25);
CHECK_COUNTER_VALUE(e, int, "Baz", EQ, 45);
}
CHECK_BENCHMARK_RESULTS("BM_CounterSet1_Tabular/threads:%int", &CheckSet1);
// ========================================================================= //
// ------------------------- Tabular Counters Output ----------------------- //
// ========================================================================= //
// set only some of the counters, different set now.
void BM_CounterSet2_Tabular(benchmark::State& state) {
for (auto _ : state) {
}
namespace bm = benchmark;
state.counters.insert({
{"Foo", {10, bm::Counter::kAvgThreads}},
{"Bat", {30, bm::Counter::kAvgThreads}},
{"Baz", {40, bm::Counter::kAvgThreads}},
});
}
BENCHMARK(BM_CounterSet2_Tabular)->ThreadRange(1, 16);
ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_CounterSet2_Tabular/threads:%int\",$"},
{"\"iterations\": %int,$", MR_Next},
{"\"real_time\": %float,$", MR_Next},
{"\"cpu_time\": %float,$", MR_Next},
{"\"time_unit\": \"ns\",$", MR_Next},
{"\"Bat\": %float,$", MR_Next},
{"\"Baz\": %float,$", MR_Next},
{"\"Foo\": %float$", MR_Next},
{"}", MR_Next}});
ADD_CASES(TC_CSVOut, {{"^\"BM_CounterSet2_Tabular/threads:%int\",%csv_report,"
",%float,%float,%float,,"}});
// VS2013 does not allow this function to be passed as a lambda argument
// to CHECK_BENCHMARK_RESULTS()
void CheckSet2(Results const& e) {
CHECK_COUNTER_VALUE(e, int, "Foo", EQ, 10);
CHECK_COUNTER_VALUE(e, int, "Bat", EQ, 30);
CHECK_COUNTER_VALUE(e, int, "Baz", EQ, 40);
}
CHECK_BENCHMARK_RESULTS("BM_CounterSet2_Tabular", &CheckSet2);
// ========================================================================= //
// --------------------------- TEST CASES END ------------------------------ //
// ========================================================================= //
int main(int argc, char* argv[]) { RunOutputTests(argc, argv); }

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#undef NDEBUG
#include "benchmark/benchmark.h"
#include "output_test.h"
// ========================================================================= //
// ---------------------- Testing Prologue Output -------------------------- //
// ========================================================================= //
ADD_CASES(TC_ConsoleOut,
{{"^[-]+$", MR_Next},
{"^Benchmark %s Time %s CPU %s Iterations UserCounters...$", MR_Next},
{"^[-]+$", MR_Next}});
ADD_CASES(TC_CSVOut, {{"%csv_header,\"bar\",\"foo\""}});
// ========================================================================= //
// ------------------------- Simple Counters Output ------------------------ //
// ========================================================================= //
void BM_Counters_Simple(benchmark::State& state) {
for (auto _ : state) {
}
state.counters["foo"] = 1;
state.counters["bar"] = 2 * (double)state.iterations();
}
BENCHMARK(BM_Counters_Simple);
ADD_CASES(TC_ConsoleOut, {{"^BM_Counters_Simple %console_report bar=%hrfloat foo=%hrfloat$"}});
ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_Counters_Simple\",$"},
{"\"iterations\": %int,$", MR_Next},
{"\"real_time\": %float,$", MR_Next},
{"\"cpu_time\": %float,$", MR_Next},
{"\"time_unit\": \"ns\",$", MR_Next},
{"\"bar\": %float,$", MR_Next},
{"\"foo\": %float$", MR_Next},
{"}", MR_Next}});
ADD_CASES(TC_CSVOut, {{"^\"BM_Counters_Simple\",%csv_report,%float,%float$"}});
// VS2013 does not allow this function to be passed as a lambda argument
// to CHECK_BENCHMARK_RESULTS()
void CheckSimple(Results const& e) {
double its = e.GetAs< double >("iterations");
CHECK_COUNTER_VALUE(e, int, "foo", EQ, 1);
// check that the value of bar is within 0.1% of the expected value
CHECK_FLOAT_COUNTER_VALUE(e, "bar", EQ, 2.*its, 0.001);
}
CHECK_BENCHMARK_RESULTS("BM_Counters_Simple", &CheckSimple);
// ========================================================================= //
// --------------------- Counters+Items+Bytes/s Output --------------------- //
// ========================================================================= //
namespace { int num_calls1 = 0; }
void BM_Counters_WithBytesAndItemsPSec(benchmark::State& state) {
for (auto _ : state) {
}
state.counters["foo"] = 1;
state.counters["bar"] = ++num_calls1;
state.SetBytesProcessed(364);
state.SetItemsProcessed(150);
}
BENCHMARK(BM_Counters_WithBytesAndItemsPSec);
ADD_CASES(TC_ConsoleOut,
{{"^BM_Counters_WithBytesAndItemsPSec %console_report "
"bar=%hrfloat foo=%hrfloat +%hrfloatB/s +%hrfloat items/s$"}});
ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_Counters_WithBytesAndItemsPSec\",$"},
{"\"iterations\": %int,$", MR_Next},
{"\"real_time\": %float,$", MR_Next},
{"\"cpu_time\": %float,$", MR_Next},
{"\"time_unit\": \"ns\",$", MR_Next},
{"\"bytes_per_second\": %float,$", MR_Next},
{"\"items_per_second\": %float,$", MR_Next},
{"\"bar\": %float,$", MR_Next},
{"\"foo\": %float$", MR_Next},
{"}", MR_Next}});
ADD_CASES(TC_CSVOut, {{"^\"BM_Counters_WithBytesAndItemsPSec\","
"%csv_bytes_items_report,%float,%float$"}});
// VS2013 does not allow this function to be passed as a lambda argument
// to CHECK_BENCHMARK_RESULTS()
void CheckBytesAndItemsPSec(Results const& e) {
double t = e.DurationCPUTime(); // this (and not real time) is the time used
CHECK_COUNTER_VALUE(e, int, "foo", EQ, 1);
CHECK_COUNTER_VALUE(e, int, "bar", EQ, num_calls1);
// check that the values are within 0.1% of the expected values
CHECK_FLOAT_RESULT_VALUE(e, "bytes_per_second", EQ, 364./t, 0.001);
CHECK_FLOAT_RESULT_VALUE(e, "items_per_second", EQ, 150./t, 0.001);
}
CHECK_BENCHMARK_RESULTS("BM_Counters_WithBytesAndItemsPSec",
&CheckBytesAndItemsPSec);
// ========================================================================= //
// ------------------------- Rate Counters Output -------------------------- //
// ========================================================================= //
void BM_Counters_Rate(benchmark::State& state) {
for (auto _ : state) {
}
namespace bm = benchmark;
state.counters["foo"] = bm::Counter{1, bm::Counter::kIsRate};
state.counters["bar"] = bm::Counter{2, bm::Counter::kIsRate};
}
BENCHMARK(BM_Counters_Rate);
ADD_CASES(TC_ConsoleOut, {{"^BM_Counters_Rate %console_report bar=%hrfloat/s foo=%hrfloat/s$"}});
ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_Counters_Rate\",$"},
{"\"iterations\": %int,$", MR_Next},
{"\"real_time\": %float,$", MR_Next},
{"\"cpu_time\": %float,$", MR_Next},
{"\"time_unit\": \"ns\",$", MR_Next},
{"\"bar\": %float,$", MR_Next},
{"\"foo\": %float$", MR_Next},
{"}", MR_Next}});
ADD_CASES(TC_CSVOut, {{"^\"BM_Counters_Rate\",%csv_report,%float,%float$"}});
// VS2013 does not allow this function to be passed as a lambda argument
// to CHECK_BENCHMARK_RESULTS()
void CheckRate(Results const& e) {
double t = e.DurationCPUTime(); // this (and not real time) is the time used
// check that the values are within 0.1% of the expected values
CHECK_FLOAT_COUNTER_VALUE(e, "foo", EQ, 1./t, 0.001);
CHECK_FLOAT_COUNTER_VALUE(e, "bar", EQ, 2./t, 0.001);
}
CHECK_BENCHMARK_RESULTS("BM_Counters_Rate", &CheckRate);
// ========================================================================= //
// ------------------------- Thread Counters Output ------------------------ //
// ========================================================================= //
void BM_Counters_Threads(benchmark::State& state) {
for (auto _ : state) {
}
state.counters["foo"] = 1;
state.counters["bar"] = 2;
}
BENCHMARK(BM_Counters_Threads)->ThreadRange(1, 8);
ADD_CASES(TC_ConsoleOut, {{"^BM_Counters_Threads/threads:%int %console_report bar=%hrfloat foo=%hrfloat$"}});
ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_Counters_Threads/threads:%int\",$"},
{"\"iterations\": %int,$", MR_Next},
{"\"real_time\": %float,$", MR_Next},
{"\"cpu_time\": %float,$", MR_Next},
{"\"time_unit\": \"ns\",$", MR_Next},
{"\"bar\": %float,$", MR_Next},
{"\"foo\": %float$", MR_Next},
{"}", MR_Next}});
ADD_CASES(TC_CSVOut, {{"^\"BM_Counters_Threads/threads:%int\",%csv_report,%float,%float$"}});
// VS2013 does not allow this function to be passed as a lambda argument
// to CHECK_BENCHMARK_RESULTS()
void CheckThreads(Results const& e) {
CHECK_COUNTER_VALUE(e, int, "foo", EQ, e.NumThreads());
CHECK_COUNTER_VALUE(e, int, "bar", EQ, 2 * e.NumThreads());
}
CHECK_BENCHMARK_RESULTS("BM_Counters_Threads/threads:%int", &CheckThreads);
// ========================================================================= //
// ---------------------- ThreadAvg Counters Output ------------------------ //
// ========================================================================= //
void BM_Counters_AvgThreads(benchmark::State& state) {
for (auto _ : state) {
}
namespace bm = benchmark;
state.counters["foo"] = bm::Counter{1, bm::Counter::kAvgThreads};
state.counters["bar"] = bm::Counter{2, bm::Counter::kAvgThreads};
}
BENCHMARK(BM_Counters_AvgThreads)->ThreadRange(1, 8);
ADD_CASES(TC_ConsoleOut, {{"^BM_Counters_AvgThreads/threads:%int %console_report bar=%hrfloat foo=%hrfloat$"}});
ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_Counters_AvgThreads/threads:%int\",$"},
{"\"iterations\": %int,$", MR_Next},
{"\"real_time\": %float,$", MR_Next},
{"\"cpu_time\": %float,$", MR_Next},
{"\"time_unit\": \"ns\",$", MR_Next},
{"\"bar\": %float,$", MR_Next},
{"\"foo\": %float$", MR_Next},
{"}", MR_Next}});
ADD_CASES(TC_CSVOut, {{"^\"BM_Counters_AvgThreads/threads:%int\",%csv_report,%float,%float$"}});
// VS2013 does not allow this function to be passed as a lambda argument
// to CHECK_BENCHMARK_RESULTS()
void CheckAvgThreads(Results const& e) {
CHECK_COUNTER_VALUE(e, int, "foo", EQ, 1);
CHECK_COUNTER_VALUE(e, int, "bar", EQ, 2);
}
CHECK_BENCHMARK_RESULTS("BM_Counters_AvgThreads/threads:%int",
&CheckAvgThreads);
// ========================================================================= //
// ---------------------- ThreadAvg Counters Output ------------------------ //
// ========================================================================= //
void BM_Counters_AvgThreadsRate(benchmark::State& state) {
for (auto _ : state) {
}
namespace bm = benchmark;
state.counters["foo"] = bm::Counter{1, bm::Counter::kAvgThreadsRate};
state.counters["bar"] = bm::Counter{2, bm::Counter::kAvgThreadsRate};
}
BENCHMARK(BM_Counters_AvgThreadsRate)->ThreadRange(1, 8);
ADD_CASES(TC_ConsoleOut, {{"^BM_Counters_AvgThreadsRate/threads:%int %console_report bar=%hrfloat/s foo=%hrfloat/s$"}});
ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_Counters_AvgThreadsRate/threads:%int\",$"},
{"\"iterations\": %int,$", MR_Next},
{"\"real_time\": %float,$", MR_Next},
{"\"cpu_time\": %float,$", MR_Next},
{"\"time_unit\": \"ns\",$", MR_Next},
{"\"bar\": %float,$", MR_Next},
{"\"foo\": %float$", MR_Next},
{"}", MR_Next}});
ADD_CASES(TC_CSVOut, {{"^\"BM_Counters_AvgThreadsRate/threads:%int\",%csv_report,%float,%float$"}});
// VS2013 does not allow this function to be passed as a lambda argument
// to CHECK_BENCHMARK_RESULTS()
void CheckAvgThreadsRate(Results const& e) {
CHECK_FLOAT_COUNTER_VALUE(e, "foo", EQ, 1./e.DurationCPUTime(), 0.001);
CHECK_FLOAT_COUNTER_VALUE(e, "bar", EQ, 2./e.DurationCPUTime(), 0.001);
}
CHECK_BENCHMARK_RESULTS("BM_Counters_AvgThreadsRate/threads:%int",
&CheckAvgThreadsRate);
// ========================================================================= //
// --------------------------- TEST CASES END ------------------------------ //
// ========================================================================= //
int main(int argc, char* argv[]) { RunOutputTests(argc, argv); }

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#!/usr/bin/env python
"""
compare.py - versatile benchmark output compare tool
"""
import argparse
from argparse import ArgumentParser
import sys
import gbench
from gbench import util, report
from gbench.util import *
def check_inputs(in1, in2, flags):
"""
Perform checking on the user provided inputs and diagnose any abnormalities
"""
in1_kind, in1_err = classify_input_file(in1)
in2_kind, in2_err = classify_input_file(in2)
output_file = find_benchmark_flag('--benchmark_out=', flags)
output_type = find_benchmark_flag('--benchmark_out_format=', flags)
if in1_kind == IT_Executable and in2_kind == IT_Executable and output_file:
print(("WARNING: '--benchmark_out=%s' will be passed to both "
"benchmarks causing it to be overwritten") % output_file)
if in1_kind == IT_JSON and in2_kind == IT_JSON and len(flags) > 0:
print("WARNING: passing optional flags has no effect since both "
"inputs are JSON")
if output_type is not None and output_type != 'json':
print(("ERROR: passing '--benchmark_out_format=%s' to 'compare.py`"
" is not supported.") % output_type)
sys.exit(1)
def create_parser():
parser = ArgumentParser(
description='versatile benchmark output compare tool')
subparsers = parser.add_subparsers(
help='This tool has multiple modes of operation:',
dest='mode')
parser_a = subparsers.add_parser(
'benchmarks',
help='The most simple use-case, compare all the output of these two benchmarks')
baseline = parser_a.add_argument_group(
'baseline', 'The benchmark baseline')
baseline.add_argument(
'test_baseline',
metavar='test_baseline',
type=argparse.FileType('r'),
nargs=1,
help='A benchmark executable or JSON output file')
contender = parser_a.add_argument_group(
'contender', 'The benchmark that will be compared against the baseline')
contender.add_argument(
'test_contender',
metavar='test_contender',
type=argparse.FileType('r'),
nargs=1,
help='A benchmark executable or JSON output file')
parser_a.add_argument(
'benchmark_options',
metavar='benchmark_options',
nargs=argparse.REMAINDER,
help='Arguments to pass when running benchmark executables')
parser_b = subparsers.add_parser(
'filters', help='Compare filter one with the filter two of benchmark')
baseline = parser_b.add_argument_group(
'baseline', 'The benchmark baseline')
baseline.add_argument(
'test',
metavar='test',
type=argparse.FileType('r'),
nargs=1,
help='A benchmark executable or JSON output file')
baseline.add_argument(
'filter_baseline',
metavar='filter_baseline',
type=str,
nargs=1,
help='The first filter, that will be used as baseline')
contender = parser_b.add_argument_group(
'contender', 'The benchmark that will be compared against the baseline')
contender.add_argument(
'filter_contender',
metavar='filter_contender',
type=str,
nargs=1,
help='The second filter, that will be compared against the baseline')
parser_b.add_argument(
'benchmark_options',
metavar='benchmark_options',
nargs=argparse.REMAINDER,
help='Arguments to pass when running benchmark executables')
parser_c = subparsers.add_parser(
'benchmarksfiltered',
help='Compare filter one of first benchmark with filter two of the second benchmark')
baseline = parser_c.add_argument_group(
'baseline', 'The benchmark baseline')
baseline.add_argument(
'test_baseline',
metavar='test_baseline',
type=argparse.FileType('r'),
nargs=1,
help='A benchmark executable or JSON output file')
baseline.add_argument(
'filter_baseline',
metavar='filter_baseline',
type=str,
nargs=1,
help='The first filter, that will be used as baseline')
contender = parser_c.add_argument_group(
'contender', 'The benchmark that will be compared against the baseline')
contender.add_argument(
'test_contender',
metavar='test_contender',
type=argparse.FileType('r'),
nargs=1,
help='The second benchmark executable or JSON output file, that will be compared against the baseline')
contender.add_argument(
'filter_contender',
metavar='filter_contender',
type=str,
nargs=1,
help='The second filter, that will be compared against the baseline')
parser_c.add_argument(
'benchmark_options',
metavar='benchmark_options',
nargs=argparse.REMAINDER,
help='Arguments to pass when running benchmark executables')
return parser
def main():
# Parse the command line flags
parser = create_parser()
args, unknown_args = parser.parse_known_args()
if args.mode is None:
parser.print_help()
exit(1)
assert not unknown_args
benchmark_options = args.benchmark_options
if args.mode == 'benchmarks':
test_baseline = args.test_baseline[0].name
test_contender = args.test_contender[0].name
filter_baseline = ''
filter_contender = ''
# NOTE: if test_baseline == test_contender, you are analyzing the stdev
description = 'Comparing %s to %s' % (test_baseline, test_contender)
elif args.mode == 'filters':
test_baseline = args.test[0].name
test_contender = args.test[0].name
filter_baseline = args.filter_baseline[0]
filter_contender = args.filter_contender[0]
# NOTE: if filter_baseline == filter_contender, you are analyzing the
# stdev
description = 'Comparing %s to %s (from %s)' % (
filter_baseline, filter_contender, args.test[0].name)
elif args.mode == 'benchmarksfiltered':
test_baseline = args.test_baseline[0].name
test_contender = args.test_contender[0].name
filter_baseline = args.filter_baseline[0]
filter_contender = args.filter_contender[0]
# NOTE: if test_baseline == test_contender and
# filter_baseline == filter_contender, you are analyzing the stdev
description = 'Comparing %s (from %s) to %s (from %s)' % (
filter_baseline, test_baseline, filter_contender, test_contender)
else:
# should never happen
print("Unrecognized mode of operation: '%s'" % args.mode)
parser.print_help()
exit(1)
check_inputs(test_baseline, test_contender, benchmark_options)
options_baseline = []
options_contender = []
if filter_baseline and filter_contender:
options_baseline = ['--benchmark_filter=%s' % filter_baseline]
options_contender = ['--benchmark_filter=%s' % filter_contender]
# Run the benchmarks and report the results
json1 = json1_orig = gbench.util.run_or_load_benchmark(
test_baseline, benchmark_options + options_baseline)
json2 = json2_orig = gbench.util.run_or_load_benchmark(
test_contender, benchmark_options + options_contender)
# Now, filter the benchmarks so that the difference report can work
if filter_baseline and filter_contender:
replacement = '[%s vs. %s]' % (filter_baseline, filter_contender)
json1 = gbench.report.filter_benchmark(
json1_orig, filter_baseline, replacement)
json2 = gbench.report.filter_benchmark(
json2_orig, filter_contender, replacement)
# Diff and output
output_lines = gbench.report.generate_difference_report(json1, json2)
print(description)
for ln in output_lines:
print(ln)
import unittest
class TestParser(unittest.TestCase):
def setUp(self):
self.parser = create_parser()
testInputs = os.path.join(
os.path.dirname(
os.path.realpath(__file__)),
'gbench',
'Inputs')
self.testInput0 = os.path.join(testInputs, 'test1_run1.json')
self.testInput1 = os.path.join(testInputs, 'test1_run2.json')
def test_benchmarks_basic(self):
parsed = self.parser.parse_args(
['benchmarks', self.testInput0, self.testInput1])
self.assertEqual(parsed.mode, 'benchmarks')
self.assertEqual(parsed.test_baseline[0].name, self.testInput0)
self.assertEqual(parsed.test_contender[0].name, self.testInput1)
self.assertFalse(parsed.benchmark_options)
def test_benchmarks_with_remainder(self):
parsed = self.parser.parse_args(
['benchmarks', self.testInput0, self.testInput1, 'd'])
self.assertEqual(parsed.mode, 'benchmarks')
self.assertEqual(parsed.test_baseline[0].name, self.testInput0)
self.assertEqual(parsed.test_contender[0].name, self.testInput1)
self.assertEqual(parsed.benchmark_options, ['d'])
def test_benchmarks_with_remainder_after_doubleminus(self):
parsed = self.parser.parse_args(
['benchmarks', self.testInput0, self.testInput1, '--', 'e'])
self.assertEqual(parsed.mode, 'benchmarks')
self.assertEqual(parsed.test_baseline[0].name, self.testInput0)
self.assertEqual(parsed.test_contender[0].name, self.testInput1)
self.assertEqual(parsed.benchmark_options, ['e'])
def test_filters_basic(self):
parsed = self.parser.parse_args(
['filters', self.testInput0, 'c', 'd'])
self.assertEqual(parsed.mode, 'filters')
self.assertEqual(parsed.test[0].name, self.testInput0)
self.assertEqual(parsed.filter_baseline[0], 'c')
self.assertEqual(parsed.filter_contender[0], 'd')
self.assertFalse(parsed.benchmark_options)
def test_filters_with_remainder(self):
parsed = self.parser.parse_args(
['filters', self.testInput0, 'c', 'd', 'e'])
self.assertEqual(parsed.mode, 'filters')
self.assertEqual(parsed.test[0].name, self.testInput0)
self.assertEqual(parsed.filter_baseline[0], 'c')
self.assertEqual(parsed.filter_contender[0], 'd')
self.assertEqual(parsed.benchmark_options, ['e'])
def test_filters_with_remainder_after_doubleminus(self):
parsed = self.parser.parse_args(
['filters', self.testInput0, 'c', 'd', '--', 'f'])
self.assertEqual(parsed.mode, 'filters')
self.assertEqual(parsed.test[0].name, self.testInput0)
self.assertEqual(parsed.filter_baseline[0], 'c')
self.assertEqual(parsed.filter_contender[0], 'd')
self.assertEqual(parsed.benchmark_options, ['f'])
def test_benchmarksfiltered_basic(self):
parsed = self.parser.parse_args(
['benchmarksfiltered', self.testInput0, 'c', self.testInput1, 'e'])
self.assertEqual(parsed.mode, 'benchmarksfiltered')
self.assertEqual(parsed.test_baseline[0].name, self.testInput0)
self.assertEqual(parsed.filter_baseline[0], 'c')
self.assertEqual(parsed.test_contender[0].name, self.testInput1)
self.assertEqual(parsed.filter_contender[0], 'e')
self.assertFalse(parsed.benchmark_options)
def test_benchmarksfiltered_with_remainder(self):
parsed = self.parser.parse_args(
['benchmarksfiltered', self.testInput0, 'c', self.testInput1, 'e', 'f'])
self.assertEqual(parsed.mode, 'benchmarksfiltered')
self.assertEqual(parsed.test_baseline[0].name, self.testInput0)
self.assertEqual(parsed.filter_baseline[0], 'c')
self.assertEqual(parsed.test_contender[0].name, self.testInput1)
self.assertEqual(parsed.filter_contender[0], 'e')
self.assertEqual(parsed.benchmark_options[0], 'f')
def test_benchmarksfiltered_with_remainder_after_doubleminus(self):
parsed = self.parser.parse_args(
['benchmarksfiltered', self.testInput0, 'c', self.testInput1, 'e', '--', 'g'])
self.assertEqual(parsed.mode, 'benchmarksfiltered')
self.assertEqual(parsed.test_baseline[0].name, self.testInput0)
self.assertEqual(parsed.filter_baseline[0], 'c')
self.assertEqual(parsed.test_contender[0].name, self.testInput1)
self.assertEqual(parsed.filter_contender[0], 'e')
self.assertEqual(parsed.benchmark_options[0], 'g')
if __name__ == '__main__':
# unittest.main()
main()
# vim: tabstop=4 expandtab shiftwidth=4 softtabstop=4
# kate: tab-width: 4; replace-tabs on; indent-width 4; tab-indents: off;
# kate: indent-mode python; remove-trailing-spaces modified;

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utils/benchmark/tools/gbench/Inputs/test1_run1.json Normal file
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@ -0,0 +1,102 @@
{
"context": {
"date": "2016-08-02 17:44:46",
"num_cpus": 4,
"mhz_per_cpu": 4228,
"cpu_scaling_enabled": false,
"library_build_type": "release"
},
"benchmarks": [
{
"name": "BM_SameTimes",
"iterations": 1000,
"real_time": 10,
"cpu_time": 10,
"time_unit": "ns"
},
{
"name": "BM_2xFaster",
"iterations": 1000,
"real_time": 50,
"cpu_time": 50,
"time_unit": "ns"
},
{
"name": "BM_2xSlower",
"iterations": 1000,
"real_time": 50,
"cpu_time": 50,
"time_unit": "ns"
},
{
"name": "BM_1PercentFaster",
"iterations": 1000,
"real_time": 100,
"cpu_time": 100,
"time_unit": "ns"
},
{
"name": "BM_1PercentSlower",
"iterations": 1000,
"real_time": 100,
"cpu_time": 100,
"time_unit": "ns"
},
{
"name": "BM_10PercentFaster",
"iterations": 1000,
"real_time": 100,
"cpu_time": 100,
"time_unit": "ns"
},
{
"name": "BM_10PercentSlower",
"iterations": 1000,
"real_time": 100,
"cpu_time": 100,
"time_unit": "ns"
},
{
"name": "BM_100xSlower",
"iterations": 1000,
"real_time": 100,
"cpu_time": 100,
"time_unit": "ns"
},
{
"name": "BM_100xFaster",
"iterations": 1000,
"real_time": 10000,
"cpu_time": 10000,
"time_unit": "ns"
},
{
"name": "BM_10PercentCPUToTime",
"iterations": 1000,
"real_time": 100,
"cpu_time": 100,
"time_unit": "ns"
},
{
"name": "BM_ThirdFaster",
"iterations": 1000,
"real_time": 100,
"cpu_time": 100,
"time_unit": "ns"
},
{
"name": "BM_BadTimeUnit",
"iterations": 1000,
"real_time": 0.4,
"cpu_time": 0.5,
"time_unit": "s"
},
{
"name": "BM_DifferentTimeUnit",
"iterations": 1,
"real_time": 1,
"cpu_time": 1,
"time_unit": "s"
}
]
}

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