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Check for rdstcp/invariant tsc support.

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This commit is contained in:
Bartosz Taudul 2019-07-10 02:01:08 +02:00
parent c0670848d2
commit c164a70b9d
1 changed files with 31 additions and 0 deletions
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31
client/TracyProfiler.cpp
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@ -8,6 +8,7 @@
# include <windows.h> # include <windows.h>
# include <tlhelp32.h> # include <tlhelp32.h>
# include <inttypes.h> # include <inttypes.h>
# include <intrin.h>
#else #else
# include <sys/time.h> # include <sys/time.h>
#endif #endif
@ -233,6 +234,36 @@ static int64_t SetupHwTimer()
return Profiler::GetTime(); return Profiler::GetTime();
} }
#elif defined TRACY_HW_TIMER && ( defined __i386 || defined _M_IX86 || defined __x86_64__ || defined _M_X64 )
static inline void CpuId( uint32_t* regs, uint32_t leaf )
{
#if defined _MSC_VER || defined __CYGWIN__
__cpuidex( (int*)regs, leaf, 0 );
#else
__get_cpuid( leaf, regs, regs+1, regs+2, regs+3 );
#endif
}
static void InitFailure( const char* msg )
{
#if defined _WIN32 || defined __CYGWIN__
MessageBoxA( nullptr, msg, "Tracy Profiler initialization failure", MB_ICONSTOP );
#else
fprintf( stderr, "Tracy Profiler initialization failure: %s\n", msg );
#endif
exit( 0 );
}
static int64_t SetupHwTimer()
{
uint32_t regs[4];
CpuId( regs, 0x80000001 );
if( !( regs[3] & ( 1 << 27 ) ) ) InitFailure( "CPU doesn't support RDTSCP instruction." );
CpuId( regs, 0x80000007 );
if( !( regs[3] & ( 1 << 8 ) ) ) InitFailure( "CPU doesn't support invariant TSC." );
return Profiler::GetTime();
}
#else #else
static int64_t SetupHwTimer() static int64_t SetupHwTimer()
{ {