linux-timer.c File Reference

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Functions
int	mmtimer_setup (void)
long long	_linux_get_real_cycles (void)
long long	_linux_get_real_usec_gettime (void)
long long	_linux_get_real_usec_gettimeofday (void)
long long	_linux_get_real_usec_cycles (void)
long long	_linux_get_virt_usec_rusage (void)
long long	_linux_get_virt_usec_times (void)
long long	_linux_get_virt_usec_gettime (void)
long long	_linux_get_virt_usec_pttimer (void)
long long	_linux_get_real_nsec_gettime (void)
long long	_linux_get_virt_nsec_gettime (void)

Function Documentation

_linux_get_real_cycles()

long long _linux_get_real_cycles

(

void

)

Definition at line 302 of file linux-timer.c.

{
    long long retval;
#if defined(HAVE_GETTIMEOFDAY)||defined(__arm__)||defined(__mips__)

    /* Crude estimate, not accurate in prescence of DVFS */

    retval = _papi_os_vector.get_real_usec(  ) *
        ( long long ) _papi_hwi_system_info.hw_info.cpu_max_mhz;
#else
    retval = get_cycles(  );
#endif
    return retval;
}

_linux_get_real_nsec_gettime()

long long _linux_get_real_nsec_gettime

(

void

)

Definition at line 523 of file linux-timer.c.

{

   long long retval;

   struct timespec foo;
#ifdef HAVE_CLOCK_GETTIME_REALTIME_HR
   syscall( __NR_clock_gettime, CLOCK_REALTIME_HR, &foo );
#else
   syscall( __NR_clock_gettime, CLOCK_REALTIME, &foo );
#endif
   retval = ( long long ) foo.tv_sec * ( long long ) 1000000000;
   retval += ( long long ) ( foo.tv_nsec );

   return retval;
}

_linux_get_real_usec_cycles()

long long _linux_get_real_usec_cycles

(

void

)

Definition at line 367 of file linux-timer.c.

{

   long long retval;

   /* Not accurate in the prescence of DVFS */

   retval = get_cycles(  ) /
            ( long long ) _papi_hwi_system_info.hw_info.cpu_max_mhz;

   return retval;
}

_linux_get_real_usec_gettime()

long long _linux_get_real_usec_gettime

(

void

)

Definition at line 330 of file linux-timer.c.

{

   long long retval;

   struct timespec foo;
#ifdef HAVE_CLOCK_GETTIME_REALTIME_HR
   syscall( __NR_clock_gettime, CLOCK_REALTIME_HR, &foo );
#else
   syscall( __NR_clock_gettime, CLOCK_REALTIME, &foo );
#endif
   retval = ( long long ) foo.tv_sec * ( long long ) 1000000;
   retval += ( long long ) ( foo.tv_nsec / 1000 );

   return retval;
}

_linux_get_real_usec_gettimeofday()

long long _linux_get_real_usec_gettimeofday

(

void

)

Definition at line 352 of file linux-timer.c.

{

   long long retval;

   struct timeval buffer;
   gettimeofday( &buffer, NULL );
   retval = ( long long ) buffer.tv_sec * ( long long ) 1000000;
   retval += ( long long ) ( buffer.tv_usec );

   return retval;
}

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_linux_get_virt_nsec_gettime()

long long _linux_get_virt_nsec_gettime

(

void

)

Definition at line 546 of file linux-timer.c.

{

    long long retval;

    struct timespec foo;

    syscall( __NR_clock_gettime, CLOCK_THREAD_CPUTIME_ID, &foo );
    retval = ( long long ) foo.tv_sec * ( long long ) 1000000000;
    retval += ( long long ) foo.tv_nsec ;

    return retval;
}

_linux_get_virt_usec_gettime()

long long _linux_get_virt_usec_gettime

(

void

)

Definition at line 433 of file linux-timer.c.

{

    long long retval;

    struct timespec foo;

    syscall( __NR_clock_gettime, CLOCK_THREAD_CPUTIME_ID, &foo );
    retval = ( long long ) foo.tv_sec * ( long long ) 1000000;
    retval += ( long long ) foo.tv_nsec / 1000;

    return retval;
}

_linux_get_virt_usec_pttimer()

long long _linux_get_virt_usec_pttimer

(

void

)

Definition at line 452 of file linux-timer.c.

{

   long long retval;
   char buf[LINE_MAX];
   long long utime, stime;
   int rv, cnt = 0, i = 0;
   int stat_fd;


again:
   sprintf( buf, "/proc/%d/task/%d/stat", getpid(  ), mygettid(  ) );
   stat_fd = open( buf, O_RDONLY );
   if ( stat_fd == -1 ) {
      PAPIERROR( "open(%s)", buf );
      return PAPI_ESYS;
   }

   rv = read( stat_fd, buf, LINE_MAX * sizeof ( char ) );
   if ( rv == -1 ) {
      if ( errno == EBADF ) {
     close(stat_fd);
     goto again;
      }
      PAPIERROR( "read()" );
      close(stat_fd);
      return PAPI_ESYS;
   }
   lseek( stat_fd, 0, SEEK_SET );

   if (rv == LINE_MAX) rv--;
   buf[rv] = '\0';
   SUBDBG( "Thread stat file is:%s\n", buf );
   while ( ( cnt != 13 ) && ( i < rv ) ) {
      if ( buf[i] == ' ' ) {
     cnt++;
      }
      i++;
   }

   if ( cnt != 13 ) {
      PAPIERROR( "utime and stime not in thread stat file?" );
      close(stat_fd);
      return PAPI_ESYS;
   }

   if ( sscanf( buf + i, "%llu %llu", &utime, &stime ) != 2 ) {
      close(stat_fd);
      PAPIERROR("Unable to scan two items from thread stat file at 13th space?");
      return PAPI_ESYS;
   }

   retval = ( utime + stime ) * ( long long ) 1000000 /_papi_os_info.clock_ticks;

   close(stat_fd);

   return retval;
}

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_linux_get_virt_usec_rusage()

long long _linux_get_virt_usec_rusage

(

void

)

Definition at line 387 of file linux-timer.c.

{

    long long retval;

    struct rusage buffer;

    getrusage( RUSAGE_SELF, &buffer );
    SUBDBG( "user %d system %d\n", ( int ) buffer.ru_utime.tv_sec,
                ( int ) buffer.ru_stime.tv_sec );
    retval = ( long long ) ( buffer.ru_utime.tv_sec + buffer.ru_stime.tv_sec )
             * ( long long ) 1000000;
    retval += (long long) ( buffer.ru_utime.tv_usec + buffer.ru_stime.tv_usec );

    return retval;
}

_linux_get_virt_usec_times()

long long _linux_get_virt_usec_times

(

void

)

Definition at line 409 of file linux-timer.c.

{

   long long retval;

   struct tms buffer;

   times( &buffer );

   SUBDBG( "user %d system %d\n", ( int ) buffer.tms_utime,
                ( int ) buffer.tms_stime );
   retval = ( long long ) ( ( buffer.tms_utime + buffer.tms_stime ) *
                1000000 / sysconf( _SC_CLK_TCK ));

   /* NOT CLOCKS_PER_SEC as in the headers! */

   return retval;
}

mmtimer_setup()

int mmtimer_setup

(

void

)

Definition at line 130 of file linux-timer.c.

                        {

#if defined(__powerpc__)
multiplier = ((uint64_t)_papi_hwi_system_info.hw_info.cpu_max_mhz * 1000000ULL) / (__ppc_get_timebase_freq()/(uint64_t)1000);
#endif
return PAPI_OK; }