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[TimeProfiler] Emit real process ID and thread names

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Differential Revision: https://reviews.llvm.org/D78027
This commit is contained in:
Sergej Jaskiewicz 2020-04-16 16:31:00 +03:00
parent f89745b6c1
commit 87434205b4
1 changed files with 28 additions and 15 deletions
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43
lib/Support/TimeProfiler.cpp
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@ -16,6 +16,7 @@
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/JSON.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/Process.h"
#include "llvm/Support/Threading.h"
#include <algorithm>
#include <cassert>
@ -75,7 +76,10 @@ struct Entry {
struct llvm::TimeTraceProfiler {
TimeTraceProfiler(unsigned TimeTraceGranularity = 0, StringRef ProcName = "")
: StartTime(steady_clock::now()), ProcName(ProcName),
Tid(llvm::get_threadid()), TimeTraceGranularity(TimeTraceGranularity) {}
Pid(sys::Process::getProcessId()), Tid(llvm::get_threadid()),
TimeTraceGranularity(TimeTraceGranularity) {
llvm::get_thread_name(ThreadName);
}
void begin(std::string Name, llvm::function_ref<std::string()> Detail) {
Stack.emplace_back(steady_clock::now(), TimePointType(), std::move(Name),
@ -138,8 +142,8 @@ struct llvm::TimeTraceProfiler {
auto StartUs = E.getFlameGraphStartUs(StartTime);
auto DurUs = E.getFlameGraphDurUs();
J.object([&]{
J.attribute("pid", 1);
J.object([&] {
J.attribute("pid", Pid);
J.attribute("tid", int64_t(Tid));
J.attribute("ph", "X");
J.attribute("ts", StartUs);
@ -194,8 +198,8 @@ struct llvm::TimeTraceProfiler {
auto DurUs = duration_cast<microseconds>(Total.second.second).count();
auto Count = AllCountAndTotalPerName[Total.first].first;
J.object([&]{
J.attribute("pid", 1);
J.object([&] {
J.attribute("pid", Pid);
J.attribute("tid", int64_t(TotalTid));
J.attribute("ph", "X");
J.attribute("ts", 0);
@ -210,16 +214,23 @@ struct llvm::TimeTraceProfiler {
++TotalTid;
}
// Emit metadata event with process name.
J.object([&] {
J.attribute("cat", "");
J.attribute("pid", 1);
J.attribute("tid", 0);
J.attribute("ts", 0);
J.attribute("ph", "M");
J.attribute("name", "process_name");
J.attributeObject("args", [&] { J.attribute("name", ProcName); });
});
auto writeMetadataEvent = [&](const char *Name, uint64_t Tid,
StringRef arg) {
J.object([&] {
J.attribute("cat", "");
J.attribute("pid", Pid);
J.attribute("tid", int64_t(Tid));
J.attribute("ts", 0);
J.attribute("ph", "M");
J.attribute("name", Name);
J.attributeObject("args", [&] { J.attribute("name", arg); });
});
};
writeMetadataEvent("process_name", Tid, ProcName);
writeMetadataEvent("thread_name", Tid, ThreadName);
for (const TimeTraceProfiler *TTP : ThreadTimeTraceProfilerInstances)
writeMetadataEvent("thread_name", TTP->Tid, TTP->ThreadName);
J.arrayEnd();
J.attributeEnd();
@ -231,6 +242,8 @@ struct llvm::TimeTraceProfiler {
StringMap<CountAndDurationType> CountAndTotalPerName;
const TimePointType StartTime;
const std::string ProcName;
const sys::Process::Pid Pid;
SmallString<0> ThreadName;
const uint64_t Tid;
// Minimum time granularity (in microseconds)