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Add support for clock_gettime_nsec_np()

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Prefer clock_gettime_nsec_np(CLOCK_UPTIME_RAW) to mach_absolute_time().
This commit is contained in:
Qi Wang
2024-10-04 15:25:54 -07:00
committed by Qi Wang
parent 397827a27d
commit 6d625d5e5e
3 changed files with 27 additions and 1 deletions
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10
configure.ac
View File

@@ -2126,6 +2126,16 @@ if test "x${je_cv_clock_realtime}" = "xyes" ; then
AC_DEFINE([JEMALLOC_HAVE_CLOCK_REALTIME], [ ], [ ]) AC_DEFINE([JEMALLOC_HAVE_CLOCK_REALTIME], [ ], [ ])
fi fi
dnl Check for clock_gettime_nsec_np().
JE_COMPILABLE([clock_gettime_nsec_np()], [
#include <time.h>
], [
clock_gettime_nsec_np(CLOCK_UPTIME_RAW);
], [je_cv_clock_gettime_nsec_np])
if test "x${je_cv_clock_gettime_nsec_np}" = "xyes" ; then
AC_DEFINE([JEMALLOC_HAVE_CLOCK_GETTIME_NSEC_NP], [ ], [ ])
fi
dnl Use syscall(2) (if available) by default. dnl Use syscall(2) (if available) by default.
AC_ARG_ENABLE([syscall], AC_ARG_ENABLE([syscall],
[AS_HELP_STRING([--disable-syscall], [Disable use of syscall(2)])], [AS_HELP_STRING([--disable-syscall], [Disable use of syscall(2)])],

5
include/jemalloc/internal/jemalloc_internal_defs.h.in
View File

@@ -117,6 +117,11 @@
*/ */
#undef JEMALLOC_HAVE_CLOCK_REALTIME #undef JEMALLOC_HAVE_CLOCK_REALTIME
/*
* Defined if clock_gettime_nsec_np(CLOCK_UPTIME_RAW) is available.
*/
#undef JEMALLOC_HAVE_CLOCK_GETTIME_NSEC_NP
/* /*
* Defined if _malloc_thread_cleanup() exists. At least in the case of * Defined if _malloc_thread_cleanup() exists. At least in the case of
* FreeBSD, pthread_key_create() allocates, which if used during malloc * FreeBSD, pthread_key_create() allocates, which if used during malloc

13
src/nstime.c
View File

@@ -201,11 +201,22 @@ nstime_get(nstime_t *time) {
clock_gettime(CLOCK_MONOTONIC, &ts); clock_gettime(CLOCK_MONOTONIC, &ts);
nstime_init2(time, ts.tv_sec, ts.tv_nsec); nstime_init2(time, ts.tv_sec, ts.tv_nsec);
} }
#elif defined(JEMALLOC_HAVE_CLOCK_GETTIME_NSEC_NP)
# define NSTIME_MONOTONIC true
static void
nstime_get(nstime_t *time) {
nstime_init(time, clock_gettime_nsec_np(CLOCK_UPTIME_RAW));
}
#elif defined(JEMALLOC_HAVE_MACH_ABSOLUTE_TIME) #elif defined(JEMALLOC_HAVE_MACH_ABSOLUTE_TIME)
# define NSTIME_MONOTONIC true # define NSTIME_MONOTONIC true
static void static void
nstime_get(nstime_t *time) { nstime_get(nstime_t *time) {
nstime_init(time, mach_absolute_time()); static mach_timebase_info_data_t sTimebaseInfo;
if (sTimebaseInfo.denom == 0) {
(void) mach_timebase_info(&sTimebaseInfo);
}
nstime_init(time, mach_absolute_time() * sTimebaseInfo.numer
/ sTimebaseInfo.denom);
} }
#else #else
# define NSTIME_MONOTONIC false # define NSTIME_MONOTONIC false