diff options
| -rw-r--r-- | rts/posix/GetTime.c | 30 |
1 files changed, 26 insertions, 4 deletions
diff --git a/rts/posix/GetTime.c b/rts/posix/GetTime.c index 939eef177e..39465cb664 100644 --- a/rts/posix/GetTime.c +++ b/rts/posix/GetTime.c @@ -46,10 +46,32 @@ Ticks getProcessCPUTime(void) { - struct rusage t; - getrusage(RUSAGE_SELF, &t); - return ((Ticks)t.ru_utime.tv_sec * TICKS_PER_SECOND + - ((Ticks)t.ru_utime.tv_usec * TICKS_PER_SECOND)/1000000); +#if !defined(BE_CONSERVATIVE) && defined(HAVE_CLOCK_GETTIME) && defined (_SC_CPUTIME) && defined(CLOCK_PROCESS_CPUTIME_ID) && defined(HAVE_SYSCONF) + static int checked_sysconf = 0; + static int sysconf_result = 0; + + if (!checked_sysconf) { + sysconf_result = sysconf(_SC_CPUTIME); + checked_sysconf = 1; + } + if (sysconf_result != -1) { + struct timespec ts; + int res; + res = clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &ts); + if (res == 0) { + return ((Ticks)ts.tv_sec * TICKS_PER_SECOND + + ((Ticks)ts.tv_nsec * TICKS_PER_SECOND) / 1000000000); + } + } +#endif + + // fallback to getrusage + { + struct rusage t; + getrusage(RUSAGE_SELF, &t); + return ((Ticks)t.ru_utime.tv_sec * TICKS_PER_SECOND + + ((Ticks)t.ru_utime.tv_usec * TICKS_PER_SECOND)/1000000); + } } Ticks getProcessElapsedTime(void) |