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;
}
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;
}
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;
}
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;
}
/* 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;
}
/* 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;
}
/* 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;
}