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8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen

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Fixed the output of G1SummarizeRSetStats: too small datatype for the number of concurrently processed cards, added concurrent remembered set thread time retrieval for Linux and Windows (BSD uses os::elapsedTime() now), and other cleanup. The information presented during VM operation is now relative to the previous output, not always cumulative if G1SummarizeRSetStatsPeriod > 0. At VM exit, the code prints a cumulative summary.

Reviewed-by: johnc, jwilhelm
This commit is contained in:
Thomas Schatzl 2013-05-28 09:32:06 +02:00
parent 44d99cc5e3
commit 54964edefa
12 changed files with 585 additions and 102 deletions
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22
hotspot/src/os/linux/vm/os_linux.cpp
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@ -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 @@ jlong os::elapsed_frequency() {
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() {