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llvm-mirror/unittests/XRay/ProfileTest.cpp

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[XRay][llvm] Load XRay Profiles Summary: This change implements the profile loading functionality in LLVM to support XRay's profiling mode in compiler-rt. We introduce a type named `llvm::xray::Profile` which allows building a profile representation. We can load an XRay profile from a file to build Profile instances, or do it manually through the Profile type's API. The intent is to get the `llvm-xray` tool to generate `Profile` instances and use that as the common abstraction through which all conversion and analysis can be done. In the future we can generate `Profile` instances from `Trace` instances as well, through conversion functions. Some of the key operations supported by the `Profile` API are: - Path interning (`Profile::internPath(...)`) which returns a unique path identifier. - Block appending (`Profile::addBlock(...)`) to add thread-associated profile information. - Path ID to Path lookup (`Profile::expandPath(...)`) to look up a PathID and return the original interned path. - Block iteration. A 'Path' in this context represents the function call stack in leaf-to-root order. This is represented as a path in an internally managed prefix tree in the `Profile` instance. Having a handle (PathID) to identify the unique Paths we encounter for a particular Profile allows us to reduce the amount of memory required to associate profile data to a particular Path. This is the first of a series of patches to migrate the `llvm-stacks` tool towards using a single profile representation. Depends on D48653. Reviewers: kpw, eizan Reviewed By: kpw Subscribers: kpw, thakis, mgorny, llvm-commits, hiraditya Differential Revision: https://reviews.llvm.org/D48370 llvm-svn: 341012
2018-08-30 03:43:22 +02:00
//===- ProfileTest.cpp - XRay Profile unit tests ----------------*- C++ -*-===//
//
Update the file headers across all of the LLVM projects in the monorepo to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
2019-01-19 09:50:56 +01:00
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
[XRay][llvm] Load XRay Profiles Summary: This change implements the profile loading functionality in LLVM to support XRay's profiling mode in compiler-rt. We introduce a type named `llvm::xray::Profile` which allows building a profile representation. We can load an XRay profile from a file to build Profile instances, or do it manually through the Profile type's API. The intent is to get the `llvm-xray` tool to generate `Profile` instances and use that as the common abstraction through which all conversion and analysis can be done. In the future we can generate `Profile` instances from `Trace` instances as well, through conversion functions. Some of the key operations supported by the `Profile` API are: - Path interning (`Profile::internPath(...)`) which returns a unique path identifier. - Block appending (`Profile::addBlock(...)`) to add thread-associated profile information. - Path ID to Path lookup (`Profile::expandPath(...)`) to look up a PathID and return the original interned path. - Block iteration. A 'Path' in this context represents the function call stack in leaf-to-root order. This is represented as a path in an internally managed prefix tree in the `Profile` instance. Having a handle (PathID) to identify the unique Paths we encounter for a particular Profile allows us to reduce the amount of memory required to associate profile data to a particular Path. This is the first of a series of patches to migrate the `llvm-stacks` tool towards using a single profile representation. Depends on D48653. Reviewers: kpw, eizan Reviewed By: kpw Subscribers: kpw, thakis, mgorny, llvm-commits, hiraditya Differential Revision: https://reviews.llvm.org/D48370 llvm-svn: 341012
2018-08-30 03:43:22 +02:00
//
//===----------------------------------------------------------------------===//
#include "llvm/XRay/Profile.h"
#include "gmock/gmock.h"
#include "gtest/gtest.h"
#include <numeric>
namespace llvm {
namespace xray {
namespace {
using ::testing::AllOf;
using ::testing::ElementsAre;
using ::testing::Eq;
using ::testing::Field;
using ::testing::Not;
using ::testing::Pair;
using ::testing::UnorderedElementsAre;
TEST(ProfileTest, CreateProfile) { Profile P; }
TEST(ProfileTest, InternPath) {
Profile P;
auto Path0 = P.internPath({3, 2, 1});
auto Path1 = P.internPath({3, 2, 1});
auto Path2 = P.internPath({2, 1});
EXPECT_THAT(Path0, Eq(Path1));
EXPECT_THAT(Path0, Not(Eq(Path2)));
}
TEST(ProfileTest, ExpandPath) {
Profile P;
auto PathID = P.internPath({3, 2, 1});
auto PathOrError = P.expandPath(PathID);
if (!PathOrError)
FAIL() << "Error: " << PathOrError.takeError();
EXPECT_THAT(PathOrError.get(), ElementsAre(3, 2, 1));
}
TEST(ProfileTest, AddBlocks) {
Profile P;
// Expect an error on adding empty blocks.
EXPECT_TRUE(errorToBool(P.addBlock({})));
// Thread blocks may not be empty.
EXPECT_TRUE(errorToBool(P.addBlock({1, {}})));
// Thread blocks with data must succeed.
EXPECT_FALSE(errorToBool(P.addBlock(
Profile::Block{Profile::ThreadID{1},
{
{P.internPath({2, 1}), Profile::Data{1, 1000}},
{P.internPath({3, 2, 1}), Profile::Data{10, 100}},
}})));
}
TEST(ProfileTest, CopyProfile) {
Profile P0, P1;
EXPECT_FALSE(errorToBool(P0.addBlock(
Profile::Block{Profile::ThreadID{1},
{
{P0.internPath({2, 1}), Profile::Data{1, 1000}},
{P0.internPath({3, 2, 1}), Profile::Data{10, 100}},
}})));
P1 = P0;
EXPECT_THAT(
P1, UnorderedElementsAre(AllOf(
Field(&Profile::Block::Thread, Eq(Profile::ThreadID{1})),
Field(&Profile::Block::PathData,
UnorderedElementsAre(
Pair(P1.internPath({2, 1}),
AllOf(Field(&Profile::Data::CallCount, Eq(1u)),
Field(&Profile::Data::CumulativeLocalTime,
Eq(1000u)))),
Pair(P1.internPath({3, 2, 1}),
AllOf(Field(&Profile::Data::CallCount, Eq(10u)),
Field(&Profile::Data::CumulativeLocalTime,
Eq(100u)))))))));
}
TEST(ProfileTest, MoveProfile) {
Profile P0, P1;
EXPECT_FALSE(errorToBool(P0.addBlock(
Profile::Block{Profile::ThreadID{1},
{
{P0.internPath({2, 1}), Profile::Data{1, 1000}},
{P0.internPath({3, 2, 1}), Profile::Data{10, 100}},
}})));
P1 = std::move(P0);
EXPECT_THAT(
P1, UnorderedElementsAre(AllOf(
Field(&Profile::Block::Thread, Eq(Profile::ThreadID{1})),
Field(&Profile::Block::PathData,
UnorderedElementsAre(
Pair(P1.internPath({2, 1}),
AllOf(Field(&Profile::Data::CallCount, Eq(1u)),
Field(&Profile::Data::CumulativeLocalTime,
Eq(1000u)))),
Pair(P1.internPath({3, 2, 1}),
AllOf(Field(&Profile::Data::CallCount, Eq(10u)),
Field(&Profile::Data::CumulativeLocalTime,
Eq(100u)))))))));
EXPECT_THAT(P0, UnorderedElementsAre());
}
TEST(ProfileTest, MergeProfilesByThread) {
Profile P0, P1;
// Set up the blocks for two different threads in P0.
EXPECT_FALSE(errorToBool(P0.addBlock(
Profile::Block{Profile::ThreadID{1},
{{P0.internPath({2, 1}), Profile::Data{1, 1000}},
{P0.internPath({4, 1}), Profile::Data{1, 1000}}}})));
EXPECT_FALSE(errorToBool(P0.addBlock(
Profile::Block{Profile::ThreadID{2},
{{P0.internPath({3, 1}), Profile::Data{1, 1000}}}})));
// Set up the blocks for two different threads in P1.
EXPECT_FALSE(errorToBool(P1.addBlock(
Profile::Block{Profile::ThreadID{1},
{{P1.internPath({2, 1}), Profile::Data{1, 1000}}}})));
EXPECT_FALSE(errorToBool(P1.addBlock(
Profile::Block{Profile::ThreadID{2},
{{P1.internPath({3, 1}), Profile::Data{1, 1000}},
{P1.internPath({4, 1}), Profile::Data{1, 1000}}}})));
Profile Merged = mergeProfilesByThread(P0, P1);
EXPECT_THAT(
Merged,
UnorderedElementsAre(
// We want to see two threads after the merge.
AllOf(Field(&Profile::Block::Thread, Eq(Profile::ThreadID{1})),
Field(&Profile::Block::PathData,
UnorderedElementsAre(
Pair(Merged.internPath({2, 1}),
AllOf(Field(&Profile::Data::CallCount, Eq(2u)),
Field(&Profile::Data::CumulativeLocalTime,
Eq(2000u)))),
Pair(Merged.internPath({4, 1}),
AllOf(Field(&Profile::Data::CallCount, Eq(1u)),
Field(&Profile::Data::CumulativeLocalTime,
Eq(1000u))))))),
AllOf(Field(&Profile::Block::Thread, Eq(Profile::ThreadID{2})),
Field(&Profile::Block::PathData,
UnorderedElementsAre(
Pair(Merged.internPath({3, 1}),
AllOf(Field(&Profile::Data::CallCount, Eq(2u)),
Field(&Profile::Data::CumulativeLocalTime,
Eq(2000u)))),
Pair(Merged.internPath({4, 1}),
AllOf(Field(&Profile::Data::CallCount, Eq(1u)),
Field(&Profile::Data::CumulativeLocalTime,
Eq(1000u)))))))));
}
TEST(ProfileTest, MergeProfilesByStack) {
Profile P0, P1;
EXPECT_FALSE(errorToBool(P0.addBlock(
Profile::Block{Profile::ThreadID{1},
{{P0.internPath({2, 1}), Profile::Data{1, 1000}}}})));
EXPECT_FALSE(errorToBool(P1.addBlock(
Profile::Block{Profile::ThreadID{2},
{{P1.internPath({2, 1}), Profile::Data{1, 1000}}}})));
Profile Merged = mergeProfilesByStack(P0, P1);
EXPECT_THAT(Merged,
ElementsAre(AllOf(
// We expect that we lose the ThreadID dimension in this
// algorithm.
Field(&Profile::Block::Thread, Eq(Profile::ThreadID{0})),
Field(&Profile::Block::PathData,
ElementsAre(Pair(
Merged.internPath({2, 1}),
AllOf(Field(&Profile::Data::CallCount, Eq(2u)),
Field(&Profile::Data::CumulativeLocalTime,
Eq(2000u)))))))));
}
TEST(ProfileTest, MergeProfilesByStackAccumulate) {
std::vector<Profile> Profiles(3);
EXPECT_FALSE(errorToBool(Profiles[0].addBlock(Profile::Block{
Profile::ThreadID{1},
{{Profiles[0].internPath({2, 1}), Profile::Data{1, 1000}}}})));
EXPECT_FALSE(errorToBool(Profiles[1].addBlock(Profile::Block{
Profile::ThreadID{2},
{{Profiles[1].internPath({2, 1}), Profile::Data{1, 1000}}}})));
EXPECT_FALSE(errorToBool(Profiles[2].addBlock(Profile::Block{
Profile::ThreadID{3},
{{Profiles[2].internPath({2, 1}), Profile::Data{1, 1000}}}})));
Profile Merged = std::accumulate(Profiles.begin(), Profiles.end(), Profile(),
mergeProfilesByStack);
EXPECT_THAT(Merged,
ElementsAre(AllOf(
// We expect that we lose the ThreadID dimension in this
// algorithm.
Field(&Profile::Block::Thread, Eq(Profile::ThreadID{0})),
Field(&Profile::Block::PathData,
ElementsAre(Pair(
Merged.internPath({2, 1}),
AllOf(Field(&Profile::Data::CallCount, Eq(3u)),
Field(&Profile::Data::CumulativeLocalTime,
Eq(3000u)))))))));
}
TEST(ProfileTest, MergeProfilesByThreadAccumulate) {
std::vector<Profile> Profiles(2);
// Set up the blocks for two different threads in Profiles[0].
EXPECT_FALSE(errorToBool(Profiles[0].addBlock(Profile::Block{
Profile::ThreadID{1},
{{Profiles[0].internPath({2, 1}), Profile::Data{1, 1000}},
{Profiles[0].internPath({4, 1}), Profile::Data{1, 1000}}}})));
EXPECT_FALSE(errorToBool(Profiles[0].addBlock(Profile::Block{
Profile::ThreadID{2},
{{Profiles[0].internPath({3, 1}), Profile::Data{1, 1000}}}})));
// Set up the blocks for two different threads in Profiles[1].
EXPECT_FALSE(errorToBool(Profiles[1].addBlock(Profile::Block{
Profile::ThreadID{1},
{{Profiles[1].internPath({2, 1}), Profile::Data{1, 1000}}}})));
EXPECT_FALSE(errorToBool(Profiles[1].addBlock(Profile::Block{
Profile::ThreadID{2},
{{Profiles[1].internPath({3, 1}), Profile::Data{1, 1000}},
{Profiles[1].internPath({4, 1}), Profile::Data{1, 1000}}}})));
Profile Merged = std::accumulate(Profiles.begin(), Profiles.end(), Profile(),
mergeProfilesByThread);
EXPECT_THAT(
Merged,
UnorderedElementsAre(
// We want to see two threads after the merge.
AllOf(Field(&Profile::Block::Thread, Eq(Profile::ThreadID{1})),
Field(&Profile::Block::PathData,
UnorderedElementsAre(
Pair(Merged.internPath({2, 1}),
AllOf(Field(&Profile::Data::CallCount, Eq(2u)),
Field(&Profile::Data::CumulativeLocalTime,
Eq(2000u)))),
Pair(Merged.internPath({4, 1}),
AllOf(Field(&Profile::Data::CallCount, Eq(1u)),
Field(&Profile::Data::CumulativeLocalTime,
Eq(1000u))))))),
AllOf(Field(&Profile::Block::Thread, Eq(Profile::ThreadID{2})),
Field(&Profile::Block::PathData,
UnorderedElementsAre(
Pair(Merged.internPath({3, 1}),
AllOf(Field(&Profile::Data::CallCount, Eq(2u)),
Field(&Profile::Data::CumulativeLocalTime,
Eq(2000u)))),
Pair(Merged.internPath({4, 1}),
AllOf(Field(&Profile::Data::CallCount, Eq(1u)),
Field(&Profile::Data::CumulativeLocalTime,
Eq(1000u)))))))));
}
// FIXME: Add a test creating a Trace and generating a Profile
// FIXME: Add tests for ranking/sorting profile blocks by dimension
} // namespace
} // namespace xray
} // namespace llvm
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