Пример #1
0
static int
hp_timing_getres (struct timespec *res)
{
  if (__glibc_unlikely (nsec == 0))
    {
      hp_timing_t freq;

      /* This can only happen if we haven't initialized the `nsec'
	 variable yet.  Do this now.  We don't have to protect this
	 code against multiple execution since all of them should
	 lead to the same result.  */
      freq = __get_clockfreq ();
      if (__glibc_unlikely (freq == 0))
	/* Something went wrong.  */
	return -1;

      nsec = MAX (UINT64_C (1000000000) / freq, 1);
    }

  /* Fill in the values.
     The seconds are always zero (unless we have a 1Hz machine).  */
  res->tv_sec = 0;
  res->tv_nsec = nsec;

  return 0;
}
Пример #2
0
static int
hp_timing_settime (clockid_t clock_id, const struct timespec *tp)
{
  hp_timing_t tsc;
  hp_timing_t usertime;

  /* First thing is to get the current time.  */
  HP_TIMING_NOW (tsc);

  if (__builtin_expect (freq == 0, 0))
    {
      /* This can only happen if we haven't initialized the `freq'
	 variable yet.  Do this now. We don't have to protect this
	 code against multiple execution since all of them should lead
	 to the same result.  */
      freq = __get_clockfreq ();
      if (__builtin_expect (freq == 0, 0))
	/* Something went wrong.  */
	return -1;
    }

  /* Convert the user-provided time into CPU ticks.  */
  usertime = tp->tv_sec * freq + (tp->tv_nsec * freq) / 1000000000ull;

  /* Determine the offset and use it as the new base value.  */
  if (clock_id == CLOCK_PROCESS_CPUTIME_ID
      || __pthread_clock_settime == NULL)
    GL(dl_cpuclock_offset) = tsc - usertime;
  else
    __pthread_clock_settime (clock_id, tsc - usertime);

  return 0;
}
Пример #3
0
static int
hp_timing_gettime (clockid_t clock_id, struct timespec *tp)
{
  hp_timing_t tsc;

  if (__builtin_expect (freq == 0, 0))
    {
      /* This can only happen if we haven't initialized the `freq'
	 variable yet.  Do this now. We don't have to protect this
	 code against multiple execution since all of them should
	 lead to the same result.  */
      freq = __get_clockfreq ();
      if (__builtin_expect (freq == 0, 0))
	/* Something went wrong.  */
	return -1;
    }

  if (clock_id != CLOCK_PROCESS_CPUTIME_ID
      && __pthread_clock_gettime != NULL)
    return __pthread_clock_gettime (clock_id, freq, tp);

  /* Get the current counter.  */
  HP_TIMING_NOW (tsc);

  /* Compute the offset since the start time of the process.  */
  tsc -= GL(dl_cpuclock_offset);

  /* Compute the seconds.  */
  tp->tv_sec = tsc / freq;

  /* And the nanoseconds.  This computation should be stable until
     we get machines with about 16GHz frequency.  */
  tp->tv_nsec = ((tsc % freq) * UINT64_C (1000000000)) / freq;

  return 0;
}
static int
clock_test (clockid_t cl)
{
  struct timespec old_ts;
  struct timespec ts;
  struct timespec waitit;
  int result = 0;
  hp_timing_t freq;
  int i;

  memset (&ts, '\0', sizeof ts);

  waitit.tv_sec = 0;
  waitit.tv_nsec = 500000000;


	    /* This can only happen if we haven't initialized the `freq'
	       variable yet.  Do this now. We don't have to protect this
	       code against multiple execution since all of them should
	       lead to the same result.  */
  freq = __get_clockfreq ();  /* Get and print resolution of the clock.  */
  printf ("clockfrequency: %d\n", freq);
  if (clock_getres (cl, &ts) == 0)
    {
      if (ts.tv_nsec < 0 || ts.tv_nsec >= 1000000000)
	{
	  printf ("clock %d: nanosecond value of resolution (%ld) wrong\n", cl,  ts.tv_nsec);
	  result = 1;
	}
      else
	printf ("clock %d: resolution = %ld.%09ld secs\n",
		cl, ts.tv_sec, ts.tv_nsec);
    }
  else
    {
      printf ("clock %d: cannot get resolution\n", cl);
      result = 1;
    }

  memset (&ts, '\0', sizeof ts);
  memset (&old_ts, '\0', sizeof old_ts);

  /* Next get the current time value a few times.  */
  for (i = 0; i < 10; ++i)
    {
      if (clock_gettime (cl, &ts) == 0)
	{
	  if (ts.tv_nsec < 0 || ts.tv_nsec >= 1000000000)
	    {
	      printf ("clock %d: nanosecond value of time wrong (try %d)\n",
		      cl, i);
	      result = 1;
	    }
	  else
	    {
	      printf ("clock %d: time = %ld.%09ld secs\n",
		      cl, ts.tv_sec, ts.tv_nsec);

	      if (memcmp (&ts, &old_ts, sizeof ts) == 0)
		{
		  printf ("clock %d: time hasn't changed (try %d)\n", cl, i);
		  result = 1;

		  old_ts = ts;
		}
	    }
	}
      else
	{
	  printf ("clock %d: cannot get time (try %d)\n", cl, i);
	  result = 1;
	}

      /* Wait a bit before the next iteration.  */
      nanosleep (&waitit, NULL);
    }

  return result;
}
Пример #5
0
uint64_t
__get_timebase_freq (void)
{
    return (uint64_t) __get_clockfreq ();
}
/* Set CLOCK to value TP.  */
int
clock_settime (clockid_t clock_id, const struct timespec *tp)
{
  struct timeval tv;
  int retval;

  /* Make sure the time cvalue is OK.  */
  if (tp->tv_nsec < 0 || tp->tv_nsec >= 1000000000)
    {
      __set_errno (EINVAL);
      return -1;
    }

  switch (clock_id)
    {
    case CLOCK_REALTIME:
      TIMESPEC_TO_TIMEVAL (&tv, tp);

      retval = settimeofday (&tv, NULL);
      break;

#if HP_TIMING_AVAIL
    case CLOCK_PROCESS_CPUTIME_ID:
    case CLOCK_THREAD_CPUTIME_ID:
      {
     hp_timing_t tsc;
     hp_timing_t usertime;

     /* First thing is to get the current time.  */
     HP_TIMING_NOW (tsc);

     if (__builtin_expect (freq == 0, 0))
       {
         /* This can only happen if we haven't initialized the `freq'
            variable yet.  Do this now. We don't have to protect this
            code against multiple execution since all of them should
            lead to the same result.  */
         freq = __get_clockfreq ();
         if (__builtin_expect (freq == 0, 0))
           {
          /* Something went wrong.  */
          retval = -1;
          break;
           }
       }

     /* Convert the user-provided time into CPU ticks.  */
     usertime = tp->tv_sec * freq + (tp->tv_nsec * freq) / 1000000000ull;

     /* Determine the offset and use it as the new base value.  */
     if (clock_id != CLOCK_THREAD_CPUTIME_ID
         || __pthread_clock_settime == NULL)
;//       GL(dl_cpuclock_offset) = tsc - usertime;
     else
       __pthread_clock_settime (tsc - usertime);

     retval = 0;
      }
      break;
#endif

    default:
      __set_errno (EINVAL);
      retval = -1;
      break;
    }

  return retval;
}
Пример #7
0
/* Get current value of CLOCK and store it in TP.  */
int
clock_gettime (clockid_t clock_id, struct timespec *tp)
{
  struct timeval tv;
  int retval = -1;

  switch (clock_id)
    {
    case CLOCK_REALTIME:
      retval = gettimeofday (&tv, NULL);
      if (retval == 0)
	/* Convert into `timespec'.  */
	TIMEVAL_TO_TIMESPEC (&tv, tp);
      break;

#if HP_TIMING_AVAIL
    case CLOCK_PROCESS_CPUTIME_ID:
    case CLOCK_THREAD_CPUTIME_ID:
      {
	hp_timing_t tsc;

	if (__builtin_expect (freq == 0, 0))
	  {
	    /* This can only happen if we haven't initialized the `freq'
	       variable yet.  Do this now. We don't have to protect this
	       code against multiple execution since all of them should
	       lead to the same result.  */
	    freq = __get_clockfreq ();
	    if (__builtin_expect (freq == 0, 0))
	      /* Something went wrong.  */
	      break;
	  }

	if (clock_id == CLOCK_THREAD_CPUTIME_ID
	    && __pthread_clock_gettime != NULL)
	  {
	    retval = __pthread_clock_gettime (freq, tp);
	    break;
	  }

	/* Get the current counter.  */
	HP_TIMING_NOW (tsc);

	/* Compute the offset since the start time of the process.  */
	tsc -= _dl_cpuclock_offset;

	/* Compute the seconds.  */
	tp->tv_sec = tsc / freq;

	/* And the nanoseconds.  This computation should be stable until
	   we get machines with about 16GHz frequency.  */
	tp->tv_nsec = ((tsc % freq) * UINT64_C (1000000000)) / freq;

	retval = 0;
      }
    break;
#endif

    default:
      __set_errno (EINVAL);
      break;
    }

  return retval;
}
Пример #8
0
/* Get resolution of clock.  */
int
clock_getres (clockid_t clock_id, struct timespec *res)
{
  int retval = -1;

  switch (clock_id)
    {
    case CLOCK_REALTIME:
      {
	long int clk_tck = sysconf (_SC_CLK_TCK);

	if (__builtin_expect (clk_tck != -1, 1))
	  {
	    /* This implementation assumes that the realtime clock has a
	       resolution higher than 1 second.  This is the case for any
	       reasonable implementation.  */
	    res->tv_sec = 0;
	    res->tv_nsec = 1000000000 / clk_tck;

	    retval = 0;
	  }
      }
      break;

#if HP_TIMING_AVAIL
    case CLOCK_PROCESS_CPUTIME_ID:
    case CLOCK_THREAD_CPUTIME_ID:
      {
	if (__builtin_expect (nsec == 0, 0))
	  {
	    hp_timing_t freq;

	    /* This can only happen if we haven't initialized the `freq'
	       variable yet.  Do this now. We don't have to protect this
	       code against multiple execution since all of them should
	       lead to the same result.  */
	    freq = __get_clockfreq ();
	    if (__builtin_expect (freq == 0, 0))
	      /* Something went wrong.  */
	      break;

	    nsec = MAX (UINT64_C (1000000000) / freq, 1);
	  }

	/* File in the values.  The seconds are always zero (unless we
	   have a 1Hz machine).  */
	res->tv_sec = 0;
	res->tv_nsec = nsec;

	retval = 0;
      }
      break;
#endif

    default:
      __set_errno (EINVAL);
      break;
    }

  return retval;
}
Пример #9
0
/* Get current value of CLOCK and store it in TP.  */
int
clock_gettime (clockid_t clock_id, struct timespec *tp)
{
  int retval = -1;

  switch (clock_id)
    {
#define HANDLE_REALTIME \
      do {								      \
        struct timeval tv;						      \
	retval = gettimeofday (&tv, NULL);				      \
	if (retval == 0)						      \
	  /* Convert into `timespec'.  */				      \
	  TIMEVAL_TO_TIMESPEC (&tv, tp);				      \
      } while (0)

#ifdef SYSDEP_GETTIME
      SYSDEP_GETTIME;
#endif

#ifndef HANDLED_REALTIME
    case CLOCK_REALTIME:
      HANDLE_REALTIME;
      break;
#endif

    default:
#if HP_TIMING_AVAIL
      if ((clock_id & ((1 << CLOCK_IDFIELD_SIZE) - 1))
	  != CLOCK_THREAD_CPUTIME_ID)
#endif
	{
	  __set_errno (EINVAL);
	  break;
	}

#if HP_TIMING_AVAIL
      /* FALLTHROUGH.  */
    case CLOCK_PROCESS_CPUTIME_ID:
      {
	hp_timing_t tsc;

	if (__builtin_expect (freq == 0, 0))
	  {
	    /* This can only happen if we haven't initialized the `freq'
	       variable yet.  Do this now. We don't have to protect this
	       code against multiple execution since all of them should
	       lead to the same result.  */
	    freq = __get_clockfreq ();
	    if (__builtin_expect (freq == 0, 0))
	      /* Something went wrong.  */
	      break;
	  }

	if (clock_id != CLOCK_PROCESS_CPUTIME_ID
	    && __pthread_clock_gettime != NULL)
	  {
	    retval = __pthread_clock_gettime (clock_id, freq, tp);
	    break;
	  }

	/* Get the current counter.  */
	HP_TIMING_NOW (tsc);

	/* Compute the offset since the start time of the process.  */
	tsc -= GL(dl_cpuclock_offset);

	/* Compute the seconds.  */
	tp->tv_sec = tsc / freq;

	/* And the nanoseconds.  This computation should be stable until
	   we get machines with about 16GHz frequency.  */
	tp->tv_nsec = ((tsc % freq) * UINT64_C (1000000000)) / freq;

	retval = 0;
      }
    break;
#endif
    }

  return retval;
}