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Allow disabling cycle/retirement sampling.

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This commit is contained in:
Bartosz Taudul 2021-05-19 23:38:32 +02:00
parent 3a0e12043d
commit 741de5c8fb
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GPG Key ID: B7FE2008B7575DF3
1 changed files with 24 additions and 10 deletions
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34
client/TracySysTrace.cpp
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@ -1,4 +1,5 @@
#include "TracySysTrace.hpp"
#include "../common/TracySystem.hpp"
#ifdef TRACY_HAS_SYSTEM_TRACING
@ -689,6 +690,13 @@ static void SetupSampling( int64_t& samplingPeriod )
return;
#endif
#ifdef TRACY_NO_SAMPLE_RETIREMENT
const bool noRetirement = true;
#else
const char* noRetirementEnv = GetEnvVar( "TRACY_NO_SAMPLE_RETIREMENT" );
const bool noRetirement = noRetirementEnv && noRetirementEnv[0] == '1';
#endif
samplingPeriod = GetSamplingPeriod();
s_numCpus = (int)std::thread::hardware_concurrency();
@ -738,26 +746,32 @@ static void SetupSampling( int64_t& samplingPeriod )
pe.exclude_idle = 1;
pe.precise_ip = 2;
for( int i=0; i<s_numCpus; i++ )
if( !noRetirement )
{
const int fd = perf_event_open( &pe, -1, i, -1, PERF_FLAG_FD_CLOEXEC );
if( fd != -1 )
for( int i=0; i<s_numCpus; i++ )
{
new( s_ring+s_numBuffers ) RingBuffer<RingBufSize>( fd, EventCpuCycles );
s_numBuffers++;
const int fd = perf_event_open( &pe, -1, i, -1, PERF_FLAG_FD_CLOEXEC );
if( fd != -1 )
{
new( s_ring+s_numBuffers ) RingBuffer<RingBufSize>( fd, EventCpuCycles );
s_numBuffers++;
}
}
}
// Instructions retired
pe.config = PERF_COUNT_HW_INSTRUCTIONS;
for( int i=0; i<s_numCpus; i++ )
if( !noRetirement )
{
const int fd = perf_event_open( &pe, -1, i, -1, PERF_FLAG_FD_CLOEXEC );
if( fd != -1 )
for( int i=0; i<s_numCpus; i++ )
{
new( s_ring+s_numBuffers ) RingBuffer<RingBufSize>( fd, EventInstructionsRetired );
s_numBuffers++;
const int fd = perf_event_open( &pe, -1, i, -1, PERF_FLAG_FD_CLOEXEC );
if( fd != -1 )
{
new( s_ring+s_numBuffers ) RingBuffer<RingBufSize>( fd, EventInstructionsRetired );
s_numBuffers++;
}
}
}