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6765954: par compact - stress mode for splitting young gen spaces

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Reviewed-by: jmasa
This commit is contained in:
John Coomes 2008-12-11 12:05:21 -08:00
parent 7a9585170d
commit 8fc946854c
4 changed files with 207 additions and 12 deletions
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14
hotspot/src/share/vm/gc_implementation/parallelScavenge/psParallelCompact.hpp
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@ -968,6 +968,20 @@ class PSParallelCompact : AllStatic {
// Clear the summary data source_region field for the specified addresses.
static void clear_source_region(HeapWord* beg_addr, HeapWord* end_addr);
#ifndef PRODUCT
// Routines to provoke splitting a young gen space (ParallelOldGCSplitALot).
// Fill the region [start, start + words) with live object(s). Only usable
// for the old and permanent generations.
static void fill_with_live_objects(SpaceId id, HeapWord* const start,
size_t words);
// Include the new objects in the summary data.
static void summarize_new_objects(SpaceId id, HeapWord* start);
// Add live objects and/or choose the dense prefix to provoke splitting.
static void provoke_split(bool & maximum_compaction);
#endif
static void summarize_spaces_quick();
static void summarize_space(SpaceId id, bool maximum_compaction);
static void summary_phase(ParCompactionManager* cm, bool maximum_compaction);