diff options
| -rw-r--r-- | erts/aclocal.m4 | 38 | ||||
| -rw-r--r-- | erts/doc/src/erlang.xml | 4 | ||||
| -rw-r--r-- | erts/emulator/beam/erl_bif_trace.c | 4 | ||||
| -rw-r--r-- | erts/emulator/beam/erl_time.h | 2 | ||||
| -rw-r--r-- | erts/emulator/sys/unix/erl_unix_sys.h | 4 |
5 files changed, 23 insertions, 29 deletions
diff --git a/erts/aclocal.m4 b/erts/aclocal.m4 index d78025b0be..63f5a9c840 100644 --- a/erts/aclocal.m4 +++ b/erts/aclocal.m4 @@ -1881,38 +1881,30 @@ case $erl_gethrvtime in exit(0); return 0; } ], - erl_clock_gettime=yes, - erl_clock_gettime=no, + erl_clock_gettime_cpu_time=yes, + erl_clock_gettime_cpu_time=no, [ case X$erl_xcomp_clock_gettime_cpu_time in - X) erl_clock_gettime=cross;; - Xyes|Xno) erl_clock_gettime=$erl_xcomp_clock_gettime_cpu_time;; + X) erl_clock_gettime_cpu_time=cross;; + Xyes|Xno) erl_clock_gettime_cpu_time=$erl_xcomp_clock_gettime_cpu_time;; *) AC_MSG_ERROR([Bad erl_xcomp_clock_gettime_cpu_time value: $erl_xcomp_clock_gettime_cpu_time]);; esac ]) LIBS=$save_libs - case $host_os in - linux*) - AC_MSG_RESULT([no; not stable]) + AC_MSG_RESULT($erl_clock_gettime_cpu_time) + case $erl_clock_gettime_cpu_time in + yes) + AC_DEFINE(HAVE_CLOCK_GETTIME_CPU_TIME,[], + [define if clock_gettime() works for getting process time]) + LIBRT=-lrt + ;; + cross) + erl_clock_gettime_cpu_time=no + AC_MSG_WARN([result no guessed because of cross compilation]) LIBRT=$xrtlib ;; *) - AC_MSG_RESULT($erl_clock_gettime) - case $erl_clock_gettime in - yes) - AC_DEFINE(HAVE_CLOCK_GETTIME,[], - [define if clock_gettime() works for getting process time]) - LIBRT=-lrt - ;; - cross) - erl_clock_gettime=no - AC_MSG_WARN([result no guessed because of cross compilation]) - LIBRT=$xrtlib - ;; - *) - LIBRT=$xrtlib - ;; - esac + LIBRT=$xrtlib ;; esac AC_SUBST(LIBRT) diff --git a/erts/doc/src/erlang.xml b/erts/doc/src/erlang.xml index f9e8717847..37431cbf1b 100644 --- a/erts/doc/src/erlang.xml +++ b/erts/doc/src/erlang.xml @@ -6829,7 +6829,9 @@ ok only allowed with <c>PidSpec==all</c>. If the host machine operating system does not support high resolution CPU time measurements, <c>trace/3</c> exits with - <c>badarg</c>.</p> + <c>badarg</c>. Note that most operating systems do + not synchronize this value across cores, so be prepared + that time might seem to go backwards when using this option.</p> </item> <tag><c>arity</c></tag> <item> diff --git a/erts/emulator/beam/erl_bif_trace.c b/erts/emulator/beam/erl_bif_trace.c index 06fbbea123..f5e582b1c5 100644 --- a/erts/emulator/beam/erl_bif_trace.c +++ b/erts/emulator/beam/erl_bif_trace.c @@ -651,7 +651,7 @@ Eterm trace_3(BIF_ALIST_3) if (pid_spec == am_all) { if (on) { if (!erts_cpu_timestamp) { -#ifdef HAVE_CLOCK_GETTIME +#ifdef HAVE_CLOCK_GETTIME_CPU_TIME /* Perhaps clock_gettime was found during config on a different machine than this. We check @@ -678,7 +678,7 @@ Eterm trace_3(BIF_ALIST_3) if (erts_start_now_cpu() < 0) { goto error; } -#endif /* HAVE_CLOCK_GETTIME */ +#endif /* HAVE_CLOCK_GETTIME_CPU_TIME */ erts_cpu_timestamp = !0; } } diff --git a/erts/emulator/beam/erl_time.h b/erts/emulator/beam/erl_time.h index 4bbdcaa3e3..7ed1a395ad 100644 --- a/erts/emulator/beam/erl_time.h +++ b/erts/emulator/beam/erl_time.h @@ -107,7 +107,7 @@ ERTS_GLB_INLINE void erts_do_time_add(erts_short_time_t elapsed) /* time_sup */ -#if (defined(HAVE_GETHRVTIME) || defined(HAVE_CLOCK_GETTIME)) +#if (defined(HAVE_GETHRVTIME) || defined(HAVE_CLOCK_GETTIME_CPU_TIME)) # ifndef HAVE_ERTS_NOW_CPU # define HAVE_ERTS_NOW_CPU # ifdef HAVE_GETHRVTIME diff --git a/erts/emulator/sys/unix/erl_unix_sys.h b/erts/emulator/sys/unix/erl_unix_sys.h index 26ed2fb558..b6bca5c0f4 100644 --- a/erts/emulator/sys/unix/erl_unix_sys.h +++ b/erts/emulator/sys/unix/erl_unix_sys.h @@ -188,7 +188,7 @@ typedef hrtime_t SysHrTime; #endif /* GETHRTIME_WITH_CLOCK_GETTIME */ #endif /* HAVE_GETHRTIME */ -#if (defined(HAVE_GETHRVTIME) || defined(HAVE_CLOCK_GETTIME)) +#if (defined(HAVE_GETHRVTIME) || defined(HAVE_CLOCK_GETTIME_CPU_TIME)) typedef long long SysCpuTime; typedef struct timespec SysTimespec; @@ -200,7 +200,7 @@ typedef struct timespec SysTimespec; int sys_start_hrvtime(void); int sys_stop_hrvtime(void); -#elif defined(HAVE_CLOCK_GETTIME) +#elif defined(HAVE_CLOCK_GETTIME_CPU_TIME) #define sys_clock_gettime(cid,tp) clock_gettime((cid),&(tp)) #define sys_get_proc_cputime(t,tp) sys_clock_gettime(CLOCK_PROCESS_CPUTIME_ID,(tp)) |