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set s_numCpus before reading it

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This commit is contained in:
Benoit Jacob 2022-03-24 14:28:27 +00:00
parent fd604444eb
commit 5eb3e3a1f0
1 changed files with 2 additions and 1 deletions
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client/TracySysTrace.cpp
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@ -817,6 +817,8 @@ bool SysTraceStart( int64_t& samplingPeriod )
samplingPeriod = GetSamplingPeriod();
uint32_t currentPid = (uint32_t)getpid();
s_numCpus = (int)std::thread::hardware_concurrency();
const auto maxNumBuffers = s_numCpus * (
1 + // software sampling
2 + // CPU cycles + instructions retired
@ -824,7 +826,6 @@ bool SysTraceStart( int64_t& samplingPeriod )
2 + // branch retired + miss
2 // context switches + wakeups
);
s_numCpus = (int)std::thread::hardware_concurrency();
s_ring = (RingBuffer*)tracy_malloc( sizeof( RingBuffer ) * maxNumBuffers );
s_numBuffers = 0;