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add nanosecond resolution for Mac OSX clock / about://tracing timings

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This commit is contained in:
Erwin Coumans
2016-12-23 18:18:35 -08:00
parent 4c06fd27b3
commit 0917310521
2 changed files with 94 additions and 10 deletions
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41
src/LinearMath/btQuickprof.cpp
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@@ -28,6 +28,9 @@
#if defined (SUNOS) || defined (__SUNOS__)
#include <stdio.h>
#endif
#ifdef __APPLE__
#include <mach/mach_time.h>
#endif
#if defined(WIN32) || defined(_WIN32)
@@ -68,6 +71,9 @@ struct btClockData
#ifdef __CELLOS_LV2__
uint64_t mStartTime;
#else
#ifdef __APPLE__
uint64_t mStartTimeNano;
#endif
struct timeval mStartTime;
#endif
#endif //__CELLOS_LV2__
@@ -117,6 +123,9 @@ void btClock::reset()
SYS_TIMEBASE_GET( newTime );
m_data->mStartTime = newTime;
#else
#ifdef __APPLE__
m_data->mStartTimeNano = mach_absolute_time();
#endif
gettimeofday(&m_data->mStartTime, 0);
#endif
#endif
@@ -218,11 +227,37 @@ unsigned long long int btClock::getTimeNanoseconds()
return (unsigned long int)((double(newTime-m_data->mStartTime)) / dFreq);
#else
#ifdef __APPLE__
uint64_t ticks = mach_absolute_time() - m_data->mStartTimeNano;
static long double conversion = 0.0L;
if( 0.0L == conversion )
{
// attempt to get conversion to nanoseconds
mach_timebase_info_data_t info;
int err = mach_timebase_info( &info );
if( err )
{
btAssert(0);
conversion = 1.;
}
conversion = info.numer / info.denom;
}
return (ticks * conversion);
struct timeval currentTime;
#else//__APPLE__
timespec ts;
clock_gettime(CLOCK_REALTIME,&ts);
return 1000000000*ts.tv_sec + ts.tv_nsec;
/* struct timeval currentTime;
gettimeofday(&currentTime, 0);
return (currentTime.tv_sec - m_data->mStartTime.tv_sec) * 1e9 +
(currentTime.tv_usec - m_data->mStartTime.tv_usec);
return (currentTime.tv_sec - m_data->mStartTime.tv_sec) * 1e9 +
(currentTime.tv_usec - m_data->mStartTime.tv_usec)*1000;
*/
#endif//__APPLE__
#endif//__CELLOS_LV2__
#endif
}