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#include "job_profiler.h"
#include <yt/yt/library/ytprof/cpu_profiler.h>
#include <yt/yt/library/ytprof/external_pprof.h>
#include <yt/yt/library/ytprof/heap_profiler.h>
#include <yt/yt/library/ytprof/profile.h>
#include <yt/yt/library/ytprof/symbolize.h>
#include <yt/cpp/mapreduce/interface/logging/logger.h>
#include <yt/cpp/mapreduce/interface/logging/yt_log.h>
#include <library/cpp/yson/node/node_io.h>
#include <contrib/libs/tcmalloc/tcmalloc/malloc_extension.h>
#include <util/system/env.h>
#include <util/system/file.h>
#include <util/system/shellcommand.h>
namespace NYT {
using namespace NYTProf;
////////////////////////////////////////////////////////////////////////////////
static void RunSubprocess(const std::vector<TString>& cmd)
{
auto command = cmd[0];
auto args = TList<TString>(cmd.begin() + 1, cmd.end());
TShellCommand(command, args)
.Run()
.Wait();
}
////////////////////////////////////////////////////////////////////////////////
class TJobProfiler
: public IJobProfiler
{
public:
TJobProfiler()
{
try {
InitializeProfiler();
} catch (const std::exception& ex) {
YT_LOG_ERROR("Failed to initialize job profiler: %v",
ex.what());
}
}
void Start() override
{
if (CpuProfiler_) {
CpuProfiler_->Start();
}
}
void Stop() override
{
if (CpuProfiler_) {
CpuProfiler_->Stop();
auto profile = CpuProfiler_->ReadProfile();
SymbolizeAndWriteProfile(&profile);
}
if (MemoryProfilingToken_) {
auto profile = ConvertAllocationProfile(std::move(*MemoryProfilingToken_).Stop());
SymbolizeAndWriteProfile(&profile);
}
if (ProfilePeakMemoryUsage_) {
auto profile = ReadHeapProfile(tcmalloc::ProfileType::kPeakHeap);
SymbolizeAndWriteProfile(&profile);
}
}
private:
std::unique_ptr<TCpuProfiler> CpuProfiler_;
std::optional<tcmalloc::MallocExtension::AllocationProfilingToken> MemoryProfilingToken_;
bool ProfilePeakMemoryUsage_ = false;
bool RunExternalSymbolizer_ = false;
void InitializeProfiler()
{
auto profilerSpecYson = GetEnv("YT_JOB_PROFILER_SPEC");
if (!profilerSpecYson) {
return;
}
auto profilerSpec = NodeFromYsonString(profilerSpecYson);
if (profilerSpec["type"] == "cpu") {
auto samplingFrequency = profilerSpec["sampling_frequency"].AsInt64();
CpuProfiler_ = std::make_unique<TCpuProfiler>(TCpuProfilerOptions{
.SamplingFrequency = static_cast<int>(samplingFrequency),
});
} else if (profilerSpec["type"] == "memory") {
MemoryProfilingToken_ = tcmalloc::MallocExtension::StartAllocationProfiling();
} else if (profilerSpec["type"] == "peak_memory") {
ProfilePeakMemoryUsage_ = true;
}
if (profilerSpec["run_external_symbolizer"] == true) {
RunExternalSymbolizer_ = true;
}
}
void SymbolizeAndWriteProfile(NYTProf::NProto::Profile* profile)
{
Symbolize(profile, /*filesOnly*/ true);
AddBuildInfo(profile, TBuildInfo::GetDefault());
if (RunExternalSymbolizer_) {
SymbolizeByExternalPProf(profile, TSymbolizationOptions{
.RunTool = RunSubprocess,
});
}
auto serializedProfile = SerializeProfile(*profile);
constexpr int ProfileFileDescriptor = 8;
TFile profileFile(ProfileFileDescriptor);
profileFile.Write(serializedProfile.data(), serializedProfile.size());
profileFile.FlushData();
}
};
////////////////////////////////////////////////////////////////////////////////
std::unique_ptr<IJobProfiler> CreateJobProfiler()
{
return std::make_unique<TJobProfiler>();
}
////////////////////////////////////////////////////////////////////////////////
} // namespace NYT
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