Mercurial > hg > graal-compiler
diff src/share/vm/gc_implementation/g1/g1CollectorPolicy.hpp @ 890:6cb8e9df7174
6819077: G1: first GC thread coming late into the GC.
Summary: The first worker thread is delayed when entering the GC because it clears the card count table that is used in identifying hot cards. Replace the card count table with a dynamically sized evicting hash table that includes an epoch based counter.
Reviewed-by: iveresov, tonyp
| author | johnc |
|---|---|
| date | Tue, 04 Aug 2009 16:00:17 -0700 |
| parents | 0316eac49d5a |
| children | e1fdf4fd34dc |
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--- a/src/share/vm/gc_implementation/g1/g1CollectorPolicy.hpp Mon Aug 03 12:59:30 2009 -0700 +++ b/src/share/vm/gc_implementation/g1/g1CollectorPolicy.hpp Tue Aug 04 16:00:17 2009 -0700 @@ -112,7 +112,6 @@ return 8*M; } - double _cur_collection_start_sec; size_t _cur_collection_pause_used_at_start_bytes; size_t _cur_collection_pause_used_regions_at_start; @@ -122,6 +121,15 @@ double _cur_clear_ct_time_ms; bool _satb_drain_time_set; +#ifndef PRODUCT + // Card Table Count Cache stats + double _min_clear_cc_time_ms; // min + double _max_clear_cc_time_ms; // max + double _cur_clear_cc_time_ms; // clearing time during current pause + double _cum_clear_cc_time_ms; // cummulative clearing time + jlong _num_cc_clears; // number of times the card count cache has been cleared +#endif + double _cur_CH_strong_roots_end_sec; double _cur_CH_strong_roots_dur_ms; double _cur_G1_strong_roots_end_sec; @@ -931,6 +939,18 @@ _cur_aux_times_ms[i] += ms; } +#ifndef PRODUCT + void record_cc_clear_time(double ms) { + if (_min_clear_cc_time_ms < 0.0 || ms <= _min_clear_cc_time_ms) + _min_clear_cc_time_ms = ms; + if (_max_clear_cc_time_ms < 0.0 || ms >= _max_clear_cc_time_ms) + _max_clear_cc_time_ms = ms; + _cur_clear_cc_time_ms = ms; + _cum_clear_cc_time_ms += ms; + _num_cc_clears++; + } +#endif + // Record the fact that "bytes" bytes allocated in a region. void record_before_bytes(size_t bytes); void record_after_bytes(size_t bytes);