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added computation of elapsed msec

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Evghenii
2014-02-20 12:30:51 +01:00
parent d6b04c58e8
commit d4c6209aa0
1 changed files with 24 additions and 1 deletions
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23
examples/timing.h
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@@ -58,6 +58,7 @@ __inline__ uint64_t rdtsc() {
#ifdef WIN32 #ifdef WIN32
#include <windows.h> #include <windows.h>
double rtc();
#define rdtsc __rdtsc #define rdtsc __rdtsc
#else // WIN32 #else // WIN32
__inline__ uint64_t rdtsc() { __inline__ uint64_t rdtsc() {
@@ -72,14 +73,30 @@ __inline__ uint64_t rdtsc() {
__asm__ __volatile__ ("rdtsc" : "=a" (low), "=d" (high)); __asm__ __volatile__ ("rdtsc" : "=a" (low), "=d" (high));
return (uint64_t)high << 32 | low; return (uint64_t)high << 32 | low;
} }
#include <sys/time.h>
static inline double rtc(void)
{
struct timeval Tvalue;
double etime;
struct timezone dummy;
gettimeofday(&Tvalue,&dummy);
etime = (double) Tvalue.tv_sec +
1.e-6*((double) Tvalue.tv_usec);
return etime;
}
#endif // !WIN32 #endif // !WIN32
#endif // !__arm__ #endif // !__arm__
static uint64_t start, end; static uint64_t start, end;
static double tstart, tend;
static inline void reset_and_start_timer() static inline void reset_and_start_timer()
{ {
start = rdtsc(); start = rdtsc();
tstart = rtc();
} }
/* Returns the number of millions of elapsed processor cycles since the /* Returns the number of millions of elapsed processor cycles since the
@@ -89,3 +106,9 @@ static inline double get_elapsed_mcycles()
end = rdtsc(); end = rdtsc();
return (end-start) / (1024. * 1024.); return (end-start) / (1024. * 1024.);
} }
static inline double get_elapsed_msec()
{
tend = rtc();
return (tend - tstart)*1e3;
}