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comparison src/share/vm/gc_implementation/g1/g1CollectorPolicy.hpp @ 4095:bca17e38de00

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6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads Summary: Select number of GC threads dynamically based on heap usage and number of Java threads Reviewed-by: johnc, ysr, jcoomes
author jmasa
date Tue, 09 Aug 2011 10:16:01 -0700
parents a88de71c4e3a
children 00dd86e542eb
comparison
equal deleted inserted replaced
4094:3a298e04d914 4095:bca17e38de00
87 private: 87 private:
88 // either equal to the number of parallel threads, if ParallelGCThreads 88 // either equal to the number of parallel threads, if ParallelGCThreads
89 // has been set, or 1 otherwise 89 // has been set, or 1 otherwise
90 int _parallel_gc_threads; 90 int _parallel_gc_threads;
91 91
92 // The number of GC threads currently active.
93 uintx _no_of_gc_threads;
94
92 enum SomePrivateConstants { 95 enum SomePrivateConstants {
93 NumPrevPausesForHeuristics = 10 96 NumPrevPausesForHeuristics = 10
94 }; 97 };
95 98
96 G1MMUTracker* _mmu_tracker; 99 G1MMUTracker* _mmu_tracker;
278 281
279 void adjust_concurrent_refinement(double update_rs_time, 282 void adjust_concurrent_refinement(double update_rs_time,
280 double update_rs_processed_buffers, 283 double update_rs_processed_buffers,
281 double goal_ms); 284 double goal_ms);
282 285
286 uintx no_of_gc_threads() { return _no_of_gc_threads; }
287 void set_no_of_gc_threads(uintx v) { _no_of_gc_threads = v; }
288
283 double _pause_time_target_ms; 289 double _pause_time_target_ms;
284 double _recorded_young_cset_choice_time_ms; 290 double _recorded_young_cset_choice_time_ms;
285 double _recorded_non_young_cset_choice_time_ms; 291 double _recorded_non_young_cset_choice_time_ms;
286 size_t _pending_cards; 292 size_t _pending_cards;
287 size_t _max_pending_cards; 293 size_t _max_pending_cards;
288 294
289 public: 295 public:
296 // Accessors
290 297
291 void set_region_eden(HeapRegion* hr, int young_index_in_cset) { 298 void set_region_eden(HeapRegion* hr, int young_index_in_cset) {
292 hr->set_young(); 299 hr->set_young();
293 hr->install_surv_rate_group(_short_lived_surv_rate_group); 300 hr->install_surv_rate_group(_short_lived_surv_rate_group);
294 hr->set_young_index_in_cset(young_index_in_cset); 301 hr->set_young_index_in_cset(young_index_in_cset);
735 742
736 void record_concurrent_mark_remark_start(); 743 void record_concurrent_mark_remark_start();
737 void record_concurrent_mark_remark_end(); 744 void record_concurrent_mark_remark_end();
738 745
739 void record_concurrent_mark_cleanup_start(); 746 void record_concurrent_mark_cleanup_start();
740 void record_concurrent_mark_cleanup_end(); 747 void record_concurrent_mark_cleanup_end(int no_of_gc_threads);
741 void record_concurrent_mark_cleanup_completed(); 748 void record_concurrent_mark_cleanup_completed();
742 749
743 void record_concurrent_pause(); 750 void record_concurrent_pause();
744 void record_concurrent_pause_end(); 751 void record_concurrent_pause_end();
745 752
746 void record_collection_pause_end(); 753 void record_collection_pause_end(int no_of_gc_threads);
747 void print_heap_transition(); 754 void print_heap_transition();
748 755
749 // Record the fact that a full collection occurred. 756 // Record the fact that a full collection occurred.
750 void record_full_collection_start(); 757 void record_full_collection_start();
751 void record_full_collection_end(); 758 void record_full_collection_end();