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add option to support hi-res timers in linux

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This commit is contained in:
Axel Kohlmeyer
2012-02-26 10:57:23 -05:00
parent 7eef27acfd
commit 7329f1dadc
1 changed files with 23 additions and 2 deletions
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25
src/timer.cpp
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@ -15,15 +15,27 @@
#include "timer.h"
#include "memory.h"
// #define LMP_CLOCK_GETTIME 1
#ifdef LMP_CLOCK_GETTIME
#include <time.h>
#endif
#ifndef _WIN32
#include "sys/time.h"
#include "sys/resource.h"
#include <sys/time.h>
#include <sys/resource.h>
#endif
using namespace LAMMPS_NS;
static double get_cpu_time()
{
#ifdef LMP_CLOCK_GETTIME
struct timespec tp;
clock_gettime(CLOCK_PROCESS_CPUTIME_ID,&tp);
double rv = (double) tp.tv_sec;
rv += (double) tp.tv_nsec * 0.0000000001;
return rv;
#else
#ifndef _WIN32
struct rusage ru;
double rv = 0.0;
@ -32,6 +44,7 @@ static double get_cpu_time()
rv += (double) ru.ru_utime.tv_usec * 0.000001;
}
return rv;
#endif
#endif
return 0.0;
}
@ -54,7 +67,15 @@ static double get_sys_time()
/* ---------------------------------------------------------------------- */
static double get_wall_time()
{
#ifdef LMP_CLOCK_GETTIME
struct timespec tp;
clock_gettime(CLOCK_REALTIME_HR,&tp);
double rv = (double) tp.tv_sec;
rv += (double) tp.tv_nsec * 0.0000000001;
return rv;
#else
return MPI_Wtime();
#endif
}
/* ---------------------------------------------------------------------- */