diff options
| author | Lukas Larsson <[email protected]> | 2018-05-15 16:32:26 +0200 |
|---|---|---|
| committer | Lukas Larsson <[email protected]> | 2018-05-15 16:36:48 +0200 |
| commit | d5dc5584884488c8fcb5710997a14c2c418692f3 (patch) | |
| tree | 1058b4ef8953d6b814d898b890873ae2627a16d3 /erts/aclocal.m4 | |
| parent | 3b3e2f46841e3e86c991be92d62cbb0360ca80e3 (diff) | |
| download | otp-d5dc5584884488c8fcb5710997a14c2c418692f3.tar.gz otp-d5dc5584884488c8fcb5710997a14c2c418692f3.tar.bz2 otp-d5dc5584884488c8fcb5710997a14c2c418692f3.zip | |
erts: Make cpu_timestamp use per thread on Linux
If we don't use per thread the value becomes completely
nonsensical on systems with more than one scheduler.
We keep the old solaris behaviour in order to support the
option, but it only really works when using a single
scheduler.
Diffstat (limited to 'erts/aclocal.m4')
| -rw-r--r-- | erts/aclocal.m4 | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/erts/aclocal.m4 b/erts/aclocal.m4 index a4d09810bd..99b96eb5bc 100644 --- a/erts/aclocal.m4 +++ b/erts/aclocal.m4 @@ -2645,7 +2645,7 @@ case $erl_gethrvtime in dnl Check if clock_gettime (linux) is working dnl - AC_MSG_CHECKING([if clock_gettime can be used to get process CPU time]) + AC_MSG_CHECKING([if clock_gettime can be used to get thread CPU time]) save_libs=$LIBS LIBS="-lrt" AC_TRY_RUN([ @@ -2659,11 +2659,11 @@ case $erl_gethrvtime in int i; struct timespec tp; - if (clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &tp) < 0) + if (clock_gettime(CLOCK_THREAD_CPUTIME_ID, &tp) < 0) exit(1); start = ((long long)tp.tv_sec * 1000000000LL) + (long long)tp.tv_nsec; for (i = 0; i < 100; i++) - clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &tp); + clock_gettime(CLOCK_THREAD_CPUTIME_ID, &tp); stop = ((long long)tp.tv_sec * 1000000000LL) + (long long)tp.tv_nsec; if (start == 0) exit(4); @@ -2686,7 +2686,7 @@ case $erl_gethrvtime in case $erl_clock_gettime_cpu_time in yes) AC_DEFINE(HAVE_CLOCK_GETTIME_CPU_TIME,[], - [define if clock_gettime() works for getting process time]) + [define if clock_gettime() works for getting thread time]) LIBRT=-lrt ;; cross) |