Mercurial > hg > truffle
diff src/os/bsd/vm/os_bsd.cpp @ 12997:e4f478e7781b
8027294: Prepare hotspot for non TOD based uptime counter
Summary: Use HR timer when available for os::elapsed_counter() on linux/bsd. Add a new counter for the JVM uptime.
Reviewed-by: dholmes, sla
author | jbachorik |
---|---|
date | Fri, 25 Oct 2013 09:07:58 +0200 |
parents | 3e265ce4d2dd |
children | 3b32d287da89 |
line wrap: on
line diff
--- a/src/os/bsd/vm/os_bsd.cpp Thu Oct 24 22:19:48 2013 -0700 +++ b/src/os/bsd/vm/os_bsd.cpp Fri Oct 25 09:07:58 2013 +0200 @@ -945,17 +945,15 @@ // Used by VMSelfDestructTimer and the MemProfiler. double os::elapsedTime() { - return (double)(os::elapsed_counter()) * 0.000001; + return ((double)os::elapsed_counter()) / os::elapsed_frequency(); } jlong os::elapsed_counter() { - timeval time; - int status = gettimeofday(&time, NULL); - return jlong(time.tv_sec) * 1000 * 1000 + jlong(time.tv_usec) - initial_time_count; + return javaTimeNanos() - initial_time_count; } jlong os::elapsed_frequency() { - return (1000 * 1000); + return NANOSECS_PER_SEC; // nanosecond resolution } bool os::supports_vtime() { return true; } @@ -3582,7 +3580,7 @@ Bsd::_main_thread = pthread_self(); Bsd::clock_init(); - initial_time_count = os::elapsed_counter(); + initial_time_count = javaTimeNanos(); #ifdef __APPLE__ // XXXDARWIN