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8013184: CMS: Call reset_after_compaction() only if a compaction has been done

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Reviewed-by: mgerdin, johnc, tschatzl
This commit is contained in:
Jon Masamitsu 2013-05-08 17:12:52 -07:00
parent 973d0400c4
commit bbff951f67
3 changed files with 84 additions and 4 deletions
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8
hotspot/src/share/vm/gc_implementation/concurrentMarkSweep/concurrentMarkSweepGeneration.hpp
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@ -604,6 +604,8 @@ class CMSCollector: public CHeapObj<mtGC> {
ConcurrentMarkSweepPolicy* _collector_policy;
ConcurrentMarkSweepPolicy* collector_policy() { return _collector_policy; }
void set_did_compact(bool v);
// XXX Move these to CMSStats ??? FIX ME !!!
elapsedTimer _inter_sweep_timer; // time between sweeps
elapsedTimer _intra_sweep_timer; // time _in_ sweeps
@ -1081,6 +1083,10 @@ class ConcurrentMarkSweepGeneration: public CardGeneration {
CollectionTypes _debug_collection_type;
// True if a compactiing collection was done.
bool _did_compact;
bool did_compact() { return _did_compact; }
// Fraction of current occupancy at which to start a CMS collection which
// will collect this generation (at least).
double _initiating_occupancy;
@ -1121,6 +1127,8 @@ class ConcurrentMarkSweepGeneration: public CardGeneration {
// Adaptive size policy
CMSAdaptiveSizePolicy* size_policy();
void set_did_compact(bool v) { _did_compact = v; }
bool refs_discovery_is_atomic() const { return false; }
bool refs_discovery_is_mt() const {
// Note: CMS does MT-discovery during the parallel-remark