Mercurial > hg > truffle
diff src/share/vm/gc_implementation/parallelScavenge/psParallelCompact.cpp @ 263:12eea04c8b06
6672698: mangle_unused_area() should not remangle the entire heap at each collection.
Summary: Maintain a high water mark for the allocations in a space and mangle only up to that high water mark.
Reviewed-by: ysr, apetrusenko
author | jmasa |
---|---|
date | Wed, 09 Jul 2008 15:08:55 -0700 |
parents | 05712c37c828 |
children | 15dd2594d08e |
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--- a/src/share/vm/gc_implementation/parallelScavenge/psParallelCompact.cpp Fri Jun 27 19:12:11 2008 -0700 +++ b/src/share/vm/gc_implementation/parallelScavenge/psParallelCompact.cpp Wed Jul 09 15:08:55 2008 -0700 @@ -1058,6 +1058,10 @@ ref_processor()->enqueue_discovered_references(NULL); + if (ZapUnusedHeapArea) { + heap->gen_mangle_unused_area(); + } + // Update time of last GC reset_millis_since_last_gc(); } @@ -1959,6 +1963,11 @@ PSPermGen* perm_gen = heap->perm_gen(); PSAdaptiveSizePolicy* size_policy = heap->size_policy(); + if (ZapUnusedHeapArea) { + // Save information needed to minimize mangling + heap->record_gen_tops_before_GC(); + } + _print_phases = PrintGCDetails && PrintParallelOldGCPhaseTimes; // Make sure data structures are sane, make the heap parsable, and do other @@ -2127,17 +2136,19 @@ size_t max_eden_size = young_gen->max_size() - young_gen->from_space()->capacity_in_bytes() - young_gen->to_space()->capacity_in_bytes(); - size_policy->compute_generation_free_space(young_gen->used_in_bytes(), - young_gen->eden_space()->used_in_bytes(), - old_gen->used_in_bytes(), - perm_gen->used_in_bytes(), - young_gen->eden_space()->capacity_in_bytes(), - old_gen->max_gen_size(), - max_eden_size, - true /* full gc*/, - gc_cause); - - heap->resize_old_gen(size_policy->calculated_old_free_size_in_bytes()); + size_policy->compute_generation_free_space( + young_gen->used_in_bytes(), + young_gen->eden_space()->used_in_bytes(), + old_gen->used_in_bytes(), + perm_gen->used_in_bytes(), + young_gen->eden_space()->capacity_in_bytes(), + old_gen->max_gen_size(), + max_eden_size, + true /* full gc*/, + gc_cause); + + heap->resize_old_gen( + size_policy->calculated_old_free_size_in_bytes()); // Don't resize the young generation at an major collection. A // desired young generation size may have been calculated but @@ -2210,6 +2221,11 @@ perm_gen->verify_object_start_array(); } + if (ZapUnusedHeapArea) { + old_gen->object_space()->check_mangled_unused_area_complete(); + perm_gen->object_space()->check_mangled_unused_area_complete(); + } + NOT_PRODUCT(ref_processor()->verify_no_references_recorded()); collection_exit.update();