8059216: Make PrintGCApplicationStoppedTime print information about stopping threads
Reviewed-by: dholmes, brutisso
--- a/hotspot/src/share/vm/services/runtimeService.cpp Thu Oct 30 18:38:42 2014 -0400
+++ b/hotspot/src/share/vm/services/runtimeService.cpp Tue Oct 28 18:41:34 2014 +0400
@@ -38,6 +38,7 @@
PerfCounter* RuntimeService::_total_safepoints = NULL;
PerfCounter* RuntimeService::_safepoint_time_ticks = NULL;
PerfCounter* RuntimeService::_application_time_ticks = NULL;
+double RuntimeService::_last_safepoint_sync_time_sec = 0.0;
void RuntimeService::init() {
// Make sure the VM version is initialized
@@ -96,6 +97,7 @@
// update the time stamp to begin recording safepoint time
_safepoint_timer.update();
+ _last_safepoint_sync_time_sec = 0.0;
if (UsePerfData) {
_total_safepoints->inc();
if (_app_timer.is_updated()) {
@@ -108,6 +110,9 @@
if (UsePerfData) {
_sync_time_ticks->inc(_safepoint_timer.ticks_since_update());
}
+ if (PrintGCApplicationStoppedTime) {
+ _last_safepoint_sync_time_sec = last_safepoint_time_sec();
+ }
}
void RuntimeService::record_safepoint_end() {
@@ -119,8 +124,10 @@
gclog_or_tty->date_stamp(PrintGCDateStamps);
gclog_or_tty->stamp(PrintGCTimeStamps);
gclog_or_tty->print_cr("Total time for which application threads "
- "were stopped: %3.7f seconds",
- last_safepoint_time_sec());
+ "were stopped: %3.7f seconds, "
+ "Stopping threads took: %3.7f seconds",
+ last_safepoint_time_sec(),
+ _last_safepoint_sync_time_sec);
}
// update the time stamp to begin recording app time
--- a/hotspot/src/share/vm/services/runtimeService.hpp Thu Oct 30 18:38:42 2014 -0400
+++ b/hotspot/src/share/vm/services/runtimeService.hpp Tue Oct 28 18:41:34 2014 +0400
@@ -37,6 +37,7 @@
static TimeStamp _safepoint_timer;
static TimeStamp _app_timer;
+ static double _last_safepoint_sync_time_sec;
public:
static void init();