mirror/tracy
1
0
Fork 0
mirror of https://github.com/wolfpld/tracy.git synced 2024-11-22 22:44:34 +00:00
Code Issues Packages Projects Releases Wiki Activity

Detect context switch callstack samples.

Browse Source 
Context switch callstack samples are not included in the sampling data
statistics (as these don't represent random sampling), but are rather put into
a separate dedicated data structure.

For this to work, a complete context switch data has to be available for the
callstack timestamp. There is no guarantee it will be present at the time it
is needed, so a second structure is added to allow postponing qualification of
callstacks.
This commit is contained in:
Bartosz Taudul 2021-11-13 02:40:32 +01:00
parent 5b799e0e45
commit 745b795d50
No known key found for this signature in database
GPG Key ID: B7FE2008B7575DF3
3 changed files with 91 additions and 50 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
server/TracyEvent.hpp
View File

@ -666,9 +666,11 @@ struct ThreadData
Vector<int64_t> childTimeStack;
Vector<GhostZone> ghostZones;
uint64_t ghostIdx;
Vector<SampleData> postponedSamples;
#endif
Vector<SampleData> samples;
SampleData pendingSample;
Vector<SampleData> ctxSwitchSamples;
uint64_t kernelSampleCnt;
uint8_t isFiber;
ThreadData* fiber;

40
server/TracyWorker.cpp
View File

@ -6162,7 +6162,43 @@ void Worker::ProcessCallstackSampleImpl( const SampleData& sd, ThreadData& td )
}
#ifndef TRACY_NO_STATISTICS
bool postpone = false;
auto ctx = GetContextSwitchData( td.id );
if( !ctx )
{
postpone = true;
}
else
{
auto it = std::lower_bound( ctx->v.begin(), ctx->v.end(), sd.time.Val(), [] ( const auto& l, const auto& r ) { return (uint64_t)l.End() < (uint64_t)r; } );
if( it == ctx->v.end() )
{
postpone = true;
}
else if( sd.time.Val() == it->Start() )
{
td.ctxSwitchSamples.push_back( sd );
}
else
{
ProcessCallstackSampleImplStats( sd, td );
}
}
if( postpone )
{
td.postponedSamples.push_back( sd );
}
#endif
}
#ifndef TRACY_NO_STATISTICS
void Worker::ProcessCallstackSampleImplStats( const SampleData& sd, ThreadData& td )
{
const auto t = sd.time.Val();
const auto callstack = sd.callstack.Val();
const auto& cs = GetCallstack( callstack );
const auto& ip = cs[0];
uint16_t tid = CompressThread( td.id );
auto frame = GetCallstackFrame( ip );
@ -6225,7 +6261,7 @@ void Worker::ProcessCallstackSampleImpl( const SampleData& sd, ThreadData& td )
sit->second.push_back_non_empty( SampleDataRange { sd.time, tid, ip } );
}
}
}
for( uint16_t i=1; i<cs.size(); i++ )
{
auto addr = GetCanonicalPointer( cs[i] );
@ -6251,8 +6287,8 @@ void Worker::ProcessCallstackSampleImpl( const SampleData& sd, ThreadData& td )
{
m_data.ghostZonesPostponed = true;
}
#endif
}
#endif
void Worker::ProcessCallstackSample( const QueueCallstackSample& ev )
{

3
server/TracyWorker.hpp
View File

@ -720,6 +720,9 @@ private:
tracy_force_inline MemEvent* ProcessMemAllocImpl( uint64_t memname, MemData& memdata, const QueueMemAlloc& ev );
tracy_force_inline MemEvent* ProcessMemFreeImpl( uint64_t memname, MemData& memdata, const QueueMemFree& ev );
tracy_force_inline void ProcessCallstackSampleImpl( const SampleData& sd, ThreadData& td );
#ifndef TRACY_NO_STATISTICS
tracy_force_inline void ProcessCallstackSampleImplStats( const SampleData& sd, ThreadData& td );
#endif
void ZoneStackFailure( uint64_t thread, const ZoneEvent* ev );
void ZoneDoubleEndFailure( uint64_t thread, const ZoneEvent* ev );