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Use _mm_pause() instead of std::this_thread::yield() if possible.

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This commit is contained in:
Bartosz Taudul 2019-12-31 14:59:54 +01:00
parent 8b56386ccd
commit 3a460d3183
5 changed files with 36 additions and 4 deletions
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1
profiler/build/win32/Tracy.vcxproj
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@ -184,6 +184,7 @@
<ClInclude Include="..\..\..\server\TracyView.hpp" /> <ClInclude Include="..\..\..\server\TracyView.hpp" />
<ClInclude Include="..\..\..\server\TracyViewData.hpp" /> <ClInclude Include="..\..\..\server\TracyViewData.hpp" />
<ClInclude Include="..\..\..\server\TracyWorker.hpp" /> <ClInclude Include="..\..\..\server\TracyWorker.hpp" />
<ClInclude Include="..\..\..\server\TracyYield.hpp" />
<ClInclude Include="..\..\..\server\tracy_flat_hash_map.hpp" /> <ClInclude Include="..\..\..\server\tracy_flat_hash_map.hpp" />
<ClInclude Include="..\..\..\server\tracy_pdqsort.h" /> <ClInclude Include="..\..\..\server\tracy_pdqsort.h" />
<ClInclude Include="..\..\..\server\tracy_xxh3.h" /> <ClInclude Include="..\..\..\server\tracy_xxh3.h" />

3
profiler/build/win32/Tracy.vcxproj.filters
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@ -302,6 +302,9 @@
<ClInclude Include="..\..\..\server\tracy_xxh3.h"> <ClInclude Include="..\..\..\server\tracy_xxh3.h">
<Filter>server</Filter> <Filter>server</Filter>
</ClInclude> </ClInclude>
<ClInclude Include="..\..\..\server\TracyYield.hpp">
<Filter>server</Filter>
</ClInclude>
</ItemGroup> </ItemGroup>
<ItemGroup> <ItemGroup>
<Natvis Include="DebugVis.natvis" /> <Natvis Include="DebugVis.natvis" />

7
server/TracyFileRead.hpp
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@ -10,6 +10,7 @@
#include <thread> #include <thread>
#include "TracyFileHeader.hpp" #include "TracyFileHeader.hpp"
#include "TracyYield.hpp"
#include "../common/tracy_lz4.hpp" #include "../common/tracy_lz4.hpp"
#include "../common/TracyForceInline.hpp" #include "../common/TracyForceInline.hpp"
@ -188,7 +189,7 @@ private:
{ {
if( m_exit.load( std::memory_order_relaxed ) == true ) return; if( m_exit.load( std::memory_order_relaxed ) == true ) return;
if( m_signalSwitch.load( std::memory_order_relaxed ) == true ) break; if( m_signalSwitch.load( std::memory_order_relaxed ) == true ) break;
std::this_thread::yield(); YieldThread();
} }
m_signalSwitch.store( false, std::memory_order_relaxed ); m_signalSwitch.store( false, std::memory_order_relaxed );
std::swap( m_buf, m_second ); std::swap( m_buf, m_second );
@ -212,7 +213,7 @@ private:
if( m_offset == BufSize ) if( m_offset == BufSize )
{ {
m_signalSwitch.store( true, std::memory_order_relaxed ); m_signalSwitch.store( true, std::memory_order_relaxed );
while( m_signalAvailable.load( std::memory_order_acquire ) == false ) { std::this_thread::yield(); } while( m_signalAvailable.load( std::memory_order_acquire ) == false ) { YieldThread(); }
m_signalAvailable.store( false, std::memory_order_relaxed ); m_signalAvailable.store( false, std::memory_order_relaxed );
} }
@ -231,7 +232,7 @@ private:
if( m_offset == BufSize ) if( m_offset == BufSize )
{ {
m_signalSwitch.store( true, std::memory_order_relaxed ); m_signalSwitch.store( true, std::memory_order_relaxed );
while( m_signalAvailable.load( std::memory_order_acquire ) == false ) { std::this_thread::yield(); } while( m_signalAvailable.load( std::memory_order_acquire ) == false ) { YieldThread(); }
m_signalAvailable.store( false, std::memory_order_relaxed ); m_signalAvailable.store( false, std::memory_order_relaxed );
} }

3
server/TracyWorker.cpp
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@ -34,6 +34,7 @@
#include "TracyTaskDispatch.hpp" #include "TracyTaskDispatch.hpp"
#include "TracyVersion.hpp" #include "TracyVersion.hpp"
#include "TracyWorker.hpp" #include "TracyWorker.hpp"
#include "TracyYield.hpp"
#include "tracy_flat_hash_map.hpp" #include "tracy_flat_hash_map.hpp"
@ -1384,7 +1385,7 @@ Worker::Worker( FileRead& f, EventType::Type eventMask, bool bgTasks )
} }
} }
if( idx >= 0 ) break; if( idx >= 0 ) break;
std::this_thread::yield(); YieldThread();
} }
if( data[idx].bufsz < sz ) if( data[idx].bufsz < sz )

26
server/TracyYield.hpp Normal file
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@ -0,0 +1,26 @@
#ifndef __TRACYYIELD_HPP__
#define __TRACYYIELD_HPP__
#if defined __SSE2__ || defined _M_AMD64 || _M_IX86_FP == 2
# include <emmintrin.h>
#else
# include <thread>
#endif
#include "../common/TracyForceInline.hpp"
namespace tracy
{
static tracy_force_inline void YieldThread()
{
#if defined __SSE2__ || defined _M_AMD64 || _M_IX86_FP == 2
_mm_pause();
#else
std::this_thread::yield();
#endif
}
}
#endif