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6819077: G1: first GC thread coming late into the GC

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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
This commit is contained in:
John Cuthbertson 2009-08-04 16:00:17 -07:00
parent 36917caf5e
commit f1cbffdd3e
9 changed files with 490 additions and 235 deletions
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16
hotspot/src/share/vm/gc_implementation/g1/g1CollectorPolicy.cpp
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@ -94,7 +94,14 @@ G1CollectorPolicy::G1CollectorPolicy() :
_summary(new Summary()),
_abandoned_summary(new AbandonedSummary()),
#ifndef PRODUCT
_cur_clear_ct_time_ms(0.0),
_min_clear_cc_time_ms(-1.0),
_max_clear_cc_time_ms(-1.0),
_cur_clear_cc_time_ms(0.0),
_cum_clear_cc_time_ms(0.0),
_num_cc_clears(0L),
#endif
_region_num_young(0),
_region_num_tenured(0),
@ -1648,6 +1655,15 @@ void G1CollectorPolicy::record_collection_pause_end(bool abandoned) {
print_stats(1, "Object Copying", obj_copy_time);
}
}
#ifndef PRODUCT
print_stats(1, "Cur Clear CC", _cur_clear_cc_time_ms);
print_stats(1, "Cum Clear CC", _cum_clear_cc_time_ms);
print_stats(1, "Min Clear CC", _min_clear_cc_time_ms);
print_stats(1, "Max Clear CC", _max_clear_cc_time_ms);
if (_num_cc_clears > 0) {
print_stats(1, "Avg Clear CC", _cum_clear_cc_time_ms / ((double)_num_cc_clears));
}
#endif
print_stats(1, "Other", other_time_ms);
for (int i = 0; i < _aux_num; ++i) {
if (_cur_aux_times_set[i]) {