73 // Check if load is lower than max.
74 double recent_load;
75 if ((G1PeriodicGCSystemLoadThreshold > 0.0f) &&
76 (os::loadavg(&recent_load, 1) == -1 || recent_load > G1PeriodicGCSystemLoadThreshold)) {
77 log_debug(gc, periodic)("Load %1.2f is higher than threshold %1.2f. Skipping.",
78 recent_load, G1PeriodicGCSystemLoadThreshold);
79 return false;
80 }
81
82 return true;
83 }
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 false /* retry_on_vmop_failure */)) {
95 log_debug(gc, periodic)("GC request denied. Skipping.");
96 }
97 }
98 _last_periodic_gc_attempt_s = os::elapsedTime();
99 }
100 }
101
102 void G1YoungRemSetSamplingThread::run_service() {
103 double vtime_start = os::elapsedVTime();
104
105 // Print a message about periodic GC configuration.
106 if (G1PeriodicGCInterval != 0) {
107 log_info(gc)("Periodic GC enabled with interval " UINTX_FORMAT "ms", G1PeriodicGCInterval);
108 } else {
109 log_info(gc)("Periodic GC disabled");
110 }
111
112 while (!should_terminate()) {
113 sample_young_list_rs_length();
114
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73 // Check if load is lower than max.
74 double recent_load;
75 if ((G1PeriodicGCSystemLoadThreshold > 0.0f) &&
76 (os::loadavg(&recent_load, 1) == -1 || recent_load > G1PeriodicGCSystemLoadThreshold)) {
77 log_debug(gc, periodic)("Load %1.2f is higher than threshold %1.2f. Skipping.",
78 recent_load, G1PeriodicGCSystemLoadThreshold);
79 return false;
80 }
81
82 return true;
83 }
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
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