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/* -----------------------------------------------------------------------------
*
* (c) The GHC Team 2005
*
* Machine-dependent time measurement functions
*
* ---------------------------------------------------------------------------*/
// Not POSIX, due to use of ru_majflt in getPageFaults()
// #include "PosixSource.h"
#include "Rts.h"
#include "GetTime.h"
#ifdef HAVE_TIME_H
# include <time.h>
#endif
#ifdef HAVE_SYS_TIME_H
# include <sys/time.h>
#endif
#if HAVE_SYS_RESOURCE_H
# include <sys/resource.h>
#endif
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#ifdef HAVE_SYS_TIMES_H
# include <sys/times.h>
#endif
#if ! ((defined(HAVE_GETRUSAGE) && !irix_HOST_OS) || defined(HAVE_TIMES))
#error No implementation for getProcessCPUTime() available.
#endif
#if defined(HAVE_GETTIMEOFDAY) && defined(HAVE_GETRUSAGE) && !irix_HOST_OS
// we'll implement getProcessCPUTime() and getProcessElapsedTime()
// separately, using getrusage() and gettimeofday() respectively
Ticks getProcessCPUTime(void)
{
struct rusage t;
getrusage(RUSAGE_SELF, &t);
return (t.ru_utime.tv_sec * TICKS_PER_SECOND +
((Ticks)t.ru_utime.tv_usec * TICKS_PER_SECOND)/1000000);
}
Ticks getProcessElapsedTime(void)
{
struct timeval tv;
gettimeofday(&tv, (struct timezone *) NULL);
return (tv.tv_sec * TICKS_PER_SECOND +
((Ticks)tv.tv_usec * TICKS_PER_SECOND)/1000000);
}
void getProcessTimes(Ticks *user, Ticks *elapsed)
{
*user = getProcessCPUTime();
*elapsed = getProcessElapsedTime();
}
#elif defined(HAVE_TIMES)
// we'll use the old times() API.
Ticks getProcessCPUTime(void)
{
Ticks user, elapsed;
getProcessTimes(&user,&elapsed);
return user;
}
Ticks getProcessElapsedTime(void)
{
Ticks user, elapsed;
getProcessTimes(&user,&elapsed);
return elapsed;
}
void getProcessTimes(Ticks *user, Ticks *elapsed)
{
static nat ClockFreq = 0;
if (ClockFreq == 0) {
#if defined(HAVE_SYSCONF)
long ticks;
ticks = sysconf(_SC_CLK_TCK);
if ( ticks == -1 ) {
errorBelch("sysconf\n");
stg_exit(EXIT_FAILURE);
}
ClockFreq = ticks;
#elif defined(CLK_TCK) /* defined by POSIX */
ClockFreq = CLK_TCK;
#elif defined(HZ)
ClockFreq = HZ;
#elif defined(CLOCKS_PER_SEC)
ClockFreq = CLOCKS_PER_SEC;
#else
errorBelch("can't get clock resolution");
stg_exit(EXIT_FAILURE);
#endif
}
struct tms t;
clock_t r = times(&t);
*user = (((Ticks)t.tms_utime * TICKS_PER_SECOND) / ClockFreq);
*elapsed = (((Ticks)r * TICKS_PER_SECOND) / ClockFreq);
}
#endif // HAVE_TIMES
Ticks getThreadCPUTime(void)
{
#if defined(HAVE_CLOCK_GETTIME) && defined(CLOCK_THREAD_CPUTIME_ID)
// clock_gettime() gives us per-thread CPU time. It isn't
// reliable on Linux, but it's the best we have.
struct timespec ts;
clock_gettime(CLOCK_THREAD_CPUTIME_ID, &ts);
return (ts.tv_sec * TICKS_PER_SECOND +
((Ticks)ts.tv_nsec * TICKS_PER_SECOND) / 1000000000);
#else
return getProcessCPUTime();
#endif
}
nat
getPageFaults(void)
{
#if !defined(HAVE_GETRUSAGE) || irix_HOST_OS
return 0;
#else
struct rusage t;
getrusage(RUSAGE_SELF, &t);
return(t.ru_majflt);
#endif
}
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