--- a/hotspot/src/os/linux/vm/os_linux.cpp Sat Jun 01 10:00:56 2013 +0200
+++ b/hotspot/src/os/linux/vm/os_linux.cpp Tue May 28 09:32:06 2013 +0200
@@ -101,6 +101,12 @@
# include <inttypes.h>
# include <sys/ioctl.h>
+// if RUSAGE_THREAD for getrusage() has not been defined, do it here. The code calling
+// getrusage() is prepared to handle the associated failure.
+#ifndef RUSAGE_THREAD
+#define RUSAGE_THREAD (1) /* only the calling thread */
+#endif
+
#define MAX_PATH (2 * K)
// for timer info max values which include all bits
@@ -1336,15 +1342,19 @@
return (1000 * 1000);
}
-// For now, we say that linux does not support vtime. I have no idea
-// whether it can actually be made to (DLD, 9/13/05).
-
-bool os::supports_vtime() { return false; }
+bool os::supports_vtime() { return true; }
bool os::enable_vtime() { return false; }
bool os::vtime_enabled() { return false; }
+
double os::elapsedVTime() {
- // better than nothing, but not much
- return elapsedTime();
+ struct rusage usage;
+ int retval = getrusage(RUSAGE_THREAD, &usage);
+ if (retval == 0) {
+ return (double) (usage.ru_utime.tv_sec + usage.ru_stime.tv_sec) + (double) (usage.ru_utime.tv_usec + usage.ru_stime.tv_usec) / (1000 * 1000);
+ } else {
+ // better than nothing, but not much
+ return elapsedTime();
+ }
}
jlong os::javaTimeMillis() {