84
85 void G1YoungRemSetSamplingThread::check_for_periodic_gc(){
86 // If disabled, just return.
87 if (G1PeriodicGCInterval == 0) {
88 return;
89 }
90 if ((os::elapsedTime() - _last_periodic_gc_attempt_s) > (G1PeriodicGCInterval / 1000.0)) {
91 log_debug(gc, periodic)("Checking for periodic GC.");
92 if (should_start_periodic_gc()) {
93 if (!G1CollectedHeap::heap()->try_collect(GCCause::_g1_periodic_collection)) {
94 log_debug(gc, periodic)("GC request denied. Skipping.");
95 }
96 }
97 _last_periodic_gc_attempt_s = os::elapsedTime();
98 }
99 }
100
101 void G1YoungRemSetSamplingThread::run_service() {
102 double vtime_start = os::elapsedVTime();
103
104 // Print a message about periodic GC configuration.
105 if (G1PeriodicGCInterval != 0) {
106 log_info(gc)("Periodic GC enabled with interval " UINTX_FORMAT "ms", G1PeriodicGCInterval);
107 } else {
108 log_info(gc)("Periodic GC disabled");
109 }
110
111 while (!should_terminate()) {
112 sample_young_list_rs_length();
113
114 if (os::supports_vtime()) {
115 _vtime_accum = (os::elapsedVTime() - vtime_start);
116 } else {
117 _vtime_accum = 0.0;
118 }
119
120 check_for_periodic_gc();
121
122 sleep_before_next_cycle();
123 }
124 }
125
126 void G1YoungRemSetSamplingThread::stop_service() {
127 MutexLocker x(&_monitor, Mutex::_no_safepoint_check_flag);
128 _monitor.notify();
129 }
130
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84
85 void G1YoungRemSetSamplingThread::check_for_periodic_gc(){
86 // If disabled, just return.
87 if (G1PeriodicGCInterval == 0) {
88 return;
89 }
90 if ((os::elapsedTime() - _last_periodic_gc_attempt_s) > (G1PeriodicGCInterval / 1000.0)) {
91 log_debug(gc, periodic)("Checking for periodic GC.");
92 if (should_start_periodic_gc()) {
93 if (!G1CollectedHeap::heap()->try_collect(GCCause::_g1_periodic_collection)) {
94 log_debug(gc, periodic)("GC request denied. Skipping.");
95 }
96 }
97 _last_periodic_gc_attempt_s = os::elapsedTime();
98 }
99 }
100
101 void G1YoungRemSetSamplingThread::run_service() {
102 double vtime_start = os::elapsedVTime();
103
104 while (!should_terminate()) {
105 sample_young_list_rs_length();
106
107 if (os::supports_vtime()) {
108 _vtime_accum = (os::elapsedVTime() - vtime_start);
109 } else {
110 _vtime_accum = 0.0;
111 }
112
113 check_for_periodic_gc();
114
115 sleep_before_next_cycle();
116 }
117 }
118
119 void G1YoungRemSetSamplingThread::stop_service() {
120 MutexLocker x(&_monitor, Mutex::_no_safepoint_check_flag);
121 _monitor.notify();
122 }
123
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