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comparison src/share/vm/gc_implementation/g1/g1CollectorPolicy.hpp @ 4023:c6a6e936dc68

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7096030: G1: PrintGCDetails enhancements 7102445: G1: Unnecessary Resource allocations during RSet scanning Summary: Add a new per-worker thread line in the PrintGCDetails output. GC Worker Other is the difference between the elapsed time for the parallel phase of the evacuation pause and the sum of the times of the sub-phases (external root scanning, mark stack scanning, RSet updating, RSet scanning, object copying, and termination) for that worker. During RSet scanning, stack allocate DirtyCardToOopClosure objects; allocating these in a resource area was causing abnormally high GC Worker Other times while the worker thread freed ResourceArea chunks. Reviewed-by: tonyp, jwilhelm, brutisso
author johnc
date Sun, 23 Oct 2011 23:06:06 -0700
parents 074f0252cc13
children a88de71c4e3a
comparison
equal deleted inserted replaced
4022:db89aa49298f 4023:c6a6e936dc68
72 define_num_seq(scan_rs) 72 define_num_seq(scan_rs)
73 define_num_seq(obj_copy) 73 define_num_seq(obj_copy)
74 define_num_seq(termination) // parallel only 74 define_num_seq(termination) // parallel only
75 define_num_seq(parallel_other) // parallel only 75 define_num_seq(parallel_other) // parallel only
76 define_num_seq(mark_closure) 76 define_num_seq(mark_closure)
77 define_num_seq(clear_ct) // parallel only 77 define_num_seq(clear_ct)
78 }; 78 };
79 79
80 class Summary: public PauseSummary, 80 class Summary: public PauseSummary,
81 public MainBodySummary { 81 public MainBodySummary {
82 public: 82 public:
113 size_t _cur_collection_pause_used_regions_at_start; 113 size_t _cur_collection_pause_used_regions_at_start;
114 size_t _prev_collection_pause_used_at_end_bytes; 114 size_t _prev_collection_pause_used_at_end_bytes;
115 double _cur_collection_par_time_ms; 115 double _cur_collection_par_time_ms;
116 double _cur_satb_drain_time_ms; 116 double _cur_satb_drain_time_ms;
117 double _cur_clear_ct_time_ms; 117 double _cur_clear_ct_time_ms;
118 bool _satb_drain_time_set;
119 double _cur_ref_proc_time_ms; 118 double _cur_ref_proc_time_ms;
120 double _cur_ref_enq_time_ms; 119 double _cur_ref_enq_time_ms;
121 120
122 #ifndef PRODUCT 121 #ifndef PRODUCT
123 // Card Table Count Cache stats 122 // Card Table Count Cache stats
173 double* _par_last_obj_copy_times_ms; 172 double* _par_last_obj_copy_times_ms;
174 double* _par_last_termination_times_ms; 173 double* _par_last_termination_times_ms;
175 double* _par_last_termination_attempts; 174 double* _par_last_termination_attempts;
176 double* _par_last_gc_worker_end_times_ms; 175 double* _par_last_gc_worker_end_times_ms;
177 double* _par_last_gc_worker_times_ms; 176 double* _par_last_gc_worker_times_ms;
177
178 // Each workers 'other' time i.e. the elapsed time of the parallel
179 // phase of the pause minus the sum of the individual sub-phase
180 // times for a given worker thread.
181 double* _par_last_gc_worker_other_times_ms;
178 182
179 // indicates whether we are in full young or partially young GC mode 183 // indicates whether we are in full young or partially young GC mode
180 bool _full_young_gcs; 184 bool _full_young_gcs;
181 185
182 // if true, then it tries to dynamically adjust the length of the 186 // if true, then it tries to dynamically adjust the length of the
890 void record_mark_stack_scan_time(int worker_i, double ms) { 894 void record_mark_stack_scan_time(int worker_i, double ms) {
891 _par_last_mark_stack_scan_times_ms[worker_i] = ms; 895 _par_last_mark_stack_scan_times_ms[worker_i] = ms;
892 } 896 }
893 897
894 void record_satb_drain_time(double ms) { 898 void record_satb_drain_time(double ms) {
899 assert(_g1->mark_in_progress(), "shouldn't be here otherwise");
895 _cur_satb_drain_time_ms = ms; 900 _cur_satb_drain_time_ms = ms;
896 _satb_drain_time_set = true; 901 }
897 } 902
898 903 void record_satb_drain_processed_buffers(int processed_buffers) {
899 void record_satb_drain_processed_buffers (int processed_buffers) { 904 assert(_g1->mark_in_progress(), "shouldn't be here otherwise");
900 _last_satb_drain_processed_buffers = processed_buffers; 905 _last_satb_drain_processed_buffers = processed_buffers;
901 } 906 }
902 907
903 void record_mod_union_time(double ms) { 908 void record_mod_union_time(double ms) {
904 _all_mod_union_times_ms->add(ms); 909 _all_mod_union_times_ms->add(ms);