lihao/jemalloc
1
0
Fork 0
mirror of https://github.com/jemalloc/jemalloc.git synced 2026-07-24 13:53:11 +00:00
Code Issues Packages Projects Releases Wiki Activity

Refine nstime_update().

Browse Source 
Add missing #include <time.h>.  The critical time facilities appear to
have been transitively included via unistd.h and sys/time.h, but in
principle this omission was capable of having caused
clock_gettime(CLOCK_MONOTONIC, ...) to have been overlooked in favor of
gettimeofday(), which in turn could cause spurious non-monotonic time
updates.

Refactor nstime_get() out of nstime_update() and add configure tests for
all variants.

Add CLOCK_MONOTONIC_RAW support (Linux-specific) and
mach_absolute_time() support (OS X-specific).

Do not fall back to clock_gettime(CLOCK_REALTIME, ...).  This was a
fragile Linux-specific workaround, which we're unlikely to use at all
now that clock_gettime(CLOCK_MONOTONIC_RAW, ...) is supported, and if we
have no choice besides non-monotonic clocks, gettimeofday() is only
incrementally worse.
This commit is contained in:
Jason Evans
2016-10-07 08:47:16 -07:00
parent 5d8db15db9
commit b732c395b7
5 changed files with 109 additions and 38 deletions
Download Patch File Download Diff File Expand all files Collapse all files

49
configure.ac
View File

@@ -345,11 +345,11 @@ dnl
dnl Define cpp macros in CPPFLAGS, rather than doing AC_DEFINE(macro), since the
dnl definitions need to be seen before any headers are included, which is a pain
dnl to make happen otherwise.
CFLAGS="$CFLAGS"
default_munmap="1"
maps_coalesce="1"
case "${host}" in
*-*-darwin* | *-*-ios*)
CFLAGS="$CFLAGS"
abi="macho"
AC_DEFINE([JEMALLOC_PURGE_MADVISE_FREE], [ ])
RPATH=""
@@ -362,30 +362,26 @@ case "${host}" in
sbrk_deprecated="1"
;;
*-*-freebsd*)
CFLAGS="$CFLAGS"
abi="elf"
AC_DEFINE([JEMALLOC_SYSCTL_VM_OVERCOMMIT], [ ])
AC_DEFINE([JEMALLOC_PURGE_MADVISE_FREE], [ ])
force_lazy_lock="1"
;;
*-*-dragonfly*)
CFLAGS="$CFLAGS"
abi="elf"
AC_DEFINE([JEMALLOC_PURGE_MADVISE_FREE], [ ])
;;
*-*-openbsd*)
CFLAGS="$CFLAGS"
abi="elf"
AC_DEFINE([JEMALLOC_PURGE_MADVISE_FREE], [ ])
force_tls="0"
;;
*-*-bitrig*)
CFLAGS="$CFLAGS"
abi="elf"
AC_DEFINE([JEMALLOC_PURGE_MADVISE_FREE], [ ])
;;
*-*-linux*)
CFLAGS="$CFLAGS"
dnl secure_getenv() is exposed by _GNU_SOURCE.
CPPFLAGS="$CPPFLAGS -D_GNU_SOURCE"
abi="elf"
AC_DEFINE([JEMALLOC_HAS_ALLOCA_H])
@@ -404,13 +400,12 @@ case "${host}" in
#error aout
#endif
]])],
[CFLAGS="$CFLAGS"; abi="elf"],
[abi="elf"],
[abi="aout"])
AC_MSG_RESULT([$abi])
AC_DEFINE([JEMALLOC_PURGE_MADVISE_FREE], [ ])
;;
*-*-solaris2*)
CFLAGS="$CFLAGS"
abi="elf"
AC_DEFINE([JEMALLOC_PURGE_MADVISE_FREE], [ ])
RPATH='-Wl,-R,$(1)'
@@ -1339,6 +1334,44 @@ if test "x$je_cv_cray_prgenv_wrapper" = "xyes" ; then
fi
fi
dnl check for CLOCK_MONOTONIC_RAW (Linux-specific).
JE_COMPILABLE([clock_gettime(CLOCK_MONOTONIC_RAW, ...)], [
#include <time.h>
], [
struct timespec ts;
clock_gettime(CLOCK_MONOTONIC_RAW, &ts);
], [je_cv_clock_monotonic_raw])
if test "x${je_cv_clock_monotonic_raw}" = "xyes" ; then
AC_DEFINE([JEMALLOC_HAVE_CLOCK_MONOTONIC_RAW])
fi
dnl check for CLOCK_MONOTONIC.
JE_COMPILABLE([clock_gettime(CLOCK_MONOTONIC, ...)], [
#include <unistd.h>
#include <time.h>
], [
struct timespec ts;
clock_gettime(CLOCK_MONOTONIC, &ts);
#if !defined(_POSIX_MONOTONIC_CLOCK) || _POSIX_MONOTONIC_CLOCK < 0
# error _POSIX_MONOTONIC_CLOCK missing/invalid
#endif
], [je_cv_clock_monotonic])
if test "x${je_cv_clock_monotonic}" = "xyes" ; then
AC_DEFINE([JEMALLOC_HAVE_CLOCK_MONOTONIC])
fi
dnl Check for mach_absolute_time().
JE_COMPILABLE([mach_absolute_time()], [
#include <mach/mach_time.h>
], [
mach_absolute_time();
], [je_cv_mach_absolute_time])
if test "x${je_cv_mach_absolute_time}" = "xyes" ; then
AC_DEFINE([JEMALLOC_HAVE_MACH_ABSOLUTE_TIME])
fi
dnl Check if the GNU-specific secure_getenv function exists.
AC_CHECK_FUNC([secure_getenv],
[have_secure_getenv="1"],