Time getProcessCPUTime(void)
{
#if !defined(BE_CONSERVATIVE) && defined(HAVE_CLOCK_GETTIME) && defined (_SC_CPUTIME) && defined(CLOCK_PROCESS_CPUTIME_ID) && defined(HAVE_SYSCONF)
static int checked_sysconf = 0;
static int sysconf_result = 0;
if (!checked_sysconf) {
sysconf_result = sysconf(_SC_CPUTIME);
checked_sysconf = 1;
}
if (sysconf_result != -1) {
struct timespec ts;
int res;
res = clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &ts);
if (res == 0) {
return SecondsToTime(ts.tv_sec) + NSToTime(ts.tv_nsec);
}
}
#endif
// fallback to getrusage
{
struct rusage t;
getrusage(RUSAGE_SELF, &t);
return SecondsToTime(t.ru_utime.tv_sec) + USToTime(t.ru_utime.tv_usec);
}
}
Time getThreadCPUTime(void)
{
#if USE_PAPI
long long usec;
if ((usec = PAPI_get_virt_usec()) < 0) {
barf("PAPI_get_virt_usec: %lld", usec);
}
return USToTime(usec);
#elif !defined(BE_CONSERVATIVE) && defined(HAVE_CLOCK_GETTIME) && defined (_SC_THREAD_CPUTIME) && defined(CLOCK_THREAD_CPUTIME_ID) && defined(HAVE_SYSCONF)
{
static int checked_sysconf = 0;
static int sysconf_result = 0;
if (!checked_sysconf) {
sysconf_result = sysconf(_SC_THREAD_CPUTIME);
checked_sysconf = 1;
}
if (sysconf_result != -1) {
// clock_gettime() gives us per-thread CPU time. It isn't
// reliable on Linux, but it's the best we have.
struct timespec ts;
int res;
res = clock_gettime(CLOCK_THREAD_CPUTIME_ID, &ts);
if (res == 0) {
return SecondsToTime(ts.tv_sec) + NSToTime(ts.tv_nsec);
}
}
}
#endif
return getProcessCPUTime();
}
static INLINE_ME Time
fileTimeToRtsTime(FILETIME ft)
{
Time t;
t = ((Time)ft.dwHighDateTime << 32) | ft.dwLowDateTime;
t = NSToTime(t * 100);
/* FILETIMES are in units of 100ns */
return t;
}
Time
getProcessElapsedTime(void)
{
return NSToTime(getMonotonicNSec());
}
