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#include "hsatimer.h"
PerfTimer::PerfTimer()
{
freq_in_100mhz = MeasureTSCFreqHz();
}
PerfTimer::~PerfTimer()
{
while(!_timers.empty())
{
Timer *temp = _timers.back();
_timers.pop_back();
delete temp;
}
}
//a new cretaed timer instantance index will be returned
int PerfTimer::CreateTimer()
{
Timer *newTimer = new Timer;
newTimer->_start = 0;
newTimer->_clocks = 0;
#ifdef _WIN32
QueryPerformanceFrequency((LARGE_INTEGER*)&newTimer->_freq);
#else
newTimer->_freq = (long long)1.0E3;
#endif
/* Push back the address of new Timer instance created */
_timers.push_back(newTimer);
return (int)(_timers.size() - 1);
}
int PerfTimer::StartTimer(int index)
{
if(index >= (int)_timers.size())
{
Error("Cannot reset timer. Invalid handle.");
return HSA_FAILURE;
}
#ifdef _WIN32
// General Windows timing method
#ifndef _AMD
long long tmpStart;
QueryPerformanceCounter((LARGE_INTEGER*)&(tmpStart));
_timers[index]->_start = (double)tmpStart;
#else
// AMD Windows timing method
#endif
#else
// General Linux timing method
#ifndef _AMD
struct timeval s;
gettimeofday(&s, 0);
_timers[index]->_start = s.tv_sec * 1.0E3 + ((double)(s.tv_usec / 1.0E3));
#else
// AMD timing method
unsigned int unused;
_timers[index]->_start = __rdtscp(&unused);
#endif
#endif
return HSA_SUCCESS;
}
int PerfTimer::StopTimer(int index)
{
double n=0;
if(index >= (int)_timers.size())
{
Error("Cannot reset timer. Invalid handle.");
return HSA_FAILURE;
}
#ifdef _WIN32
#ifndef _AMD
long long n1;
QueryPerformanceCounter((LARGE_INTEGER*)&(n1));
n = (double) n1;
#else
// AMD Window Timing
#endif
#else
// General Linux timing method
#ifndef _AMD
struct timeval s;
gettimeofday(&s, 0);
n = s.tv_sec * 1.0E3+ (double)(s.tv_usec/1.0E3);
#else
// AMD Linux timing
unsigned int unused;
n = __rdtscp(&unused);
#endif
#endif
n -= _timers[index]->_start;
_timers[index]->_start = 0;
#ifndef _AMD
_timers[index]->_clocks += n;
#else
//_timers[index]->_clocks += 10 * n /freq_in_100mhz; // unit is ns
_timers[index]->_clocks += 1.0E-6 * 10 * n /freq_in_100mhz; // convert to ms
cout << "_AMD is enabled!!!" << endl;
#endif
return HSA_SUCCESS;
}
void PerfTimer::Error(string str)
{
cout << str << endl;
}
double PerfTimer::ReadTimer(int index)
{
if(index >= (int)_timers.size())
{
Error("Cannot read timer. Invalid handle.");
return HSA_FAILURE;
}
double reading = double(_timers[index]->_clocks);
reading = double(reading / _timers[index]->_freq);
return reading;
}
uint64_t PerfTimer::CoarseTimestampUs()
{
#ifdef _WIN32
uint64_t freqHz, ticks;
QueryPerformanceFrequency((LARGE_INTEGER *)&freqHz);
QueryPerformanceCounter((LARGE_INTEGER *)&ticks);
// Scale numerator and divisor until (ticks * 1000000) fits in uint64_t.
while (ticks > (1ULL << 44)) {
ticks /= 16;
freqHz /= 16;
}
return (ticks * 1000000) / freqHz;
#else
struct timespec ts;
clock_gettime(CLOCK_MONOTONIC_RAW, &ts);
return uint64_t(ts.tv_sec) * 1000000 + ts.tv_nsec / 1000;
#endif
}
uint64_t PerfTimer::MeasureTSCFreqHz()
{
// Make a coarse interval measurement of TSC ticks for 1 gigacycles.
unsigned int unused;
uint64_t tscTicksEnd;
uint64_t coarseBeginUs = CoarseTimestampUs();
uint64_t tscTicksBegin = __rdtscp(&unused);
do
{
tscTicksEnd = __rdtscp(&unused);
}
while (tscTicksEnd - tscTicksBegin < 1000000000);
uint64_t coarseEndUs = CoarseTimestampUs();
// Compute the TSC frequency and round to nearest 100MHz.
uint64_t coarseIntervalNs = (coarseEndUs - coarseBeginUs) * 1000;
uint64_t tscIntervalTicks = tscTicksEnd - tscTicksBegin;
return (tscIntervalTicks * 10 + (coarseIntervalNs / 2)) / coarseIntervalNs;
}
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