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comparison src/share/vm/memory/tenuredGeneration.hpp @ 9072:8617e38bb4cb

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8008508: CMS does not correctly reduce heap size after a Full GC Reviewed-by: johnc, ysr
author jmasa
date Mon, 11 Feb 2013 10:31:56 -0800
parents db9981fd3124
children de6a9e811145
comparison
equal deleted inserted replaced
9071:68fe50d4f1d5 9072:8617e38bb4cb
36 class ParGCAllocBufferWithBOT; 36 class ParGCAllocBufferWithBOT;
37 37
38 class TenuredGeneration: public OneContigSpaceCardGeneration { 38 class TenuredGeneration: public OneContigSpaceCardGeneration {
39 friend class VMStructs; 39 friend class VMStructs;
40 protected: 40 protected:
41 // current shrinking effect: this damps shrinking when the heap gets empty.
42 size_t _shrink_factor;
43 // Some statistics from before gc started.
44 // These are gathered in the gc_prologue (and should_collect)
45 // to control growing/shrinking policy in spite of promotions.
46 size_t _capacity_at_prologue;
47 size_t _used_at_prologue;
48 41
49 #if INCLUDE_ALL_GCS 42 #if INCLUDE_ALL_GCS
50 // To support parallel promotion: an array of parallel allocation 43 // To support parallel promotion: an array of parallel allocation
51 // buffers, one per thread, initially NULL. 44 // buffers, one per thread, initially NULL.
52 ParGCAllocBufferWithBOT** _alloc_buffers; 45 ParGCAllocBufferWithBOT** _alloc_buffers;
78 // since that causes us to do an extra unnecessary pair of restart-&-stop-world. 71 // since that causes us to do an extra unnecessary pair of restart-&-stop-world.
79 virtual bool full_collects_younger_generations() const { 72 virtual bool full_collects_younger_generations() const {
80 return !CollectGen0First; 73 return !CollectGen0First;
81 } 74 }
82 75
83 // Mark sweep support
84 void compute_new_size();
85
86 virtual void gc_prologue(bool full); 76 virtual void gc_prologue(bool full);
87 virtual void gc_epilogue(bool full); 77 virtual void gc_epilogue(bool full);
88 bool should_collect(bool full, 78 bool should_collect(bool full,
89 size_t word_size, 79 size_t word_size,
90 bool is_tlab); 80 bool is_tlab);
91 81
92 virtual void collect(bool full, 82 virtual void collect(bool full,
93 bool clear_all_soft_refs, 83 bool clear_all_soft_refs,
94 size_t size, 84 size_t size,
95 bool is_tlab); 85 bool is_tlab);
86 virtual void compute_new_size();
96 87
97 #if INCLUDE_ALL_GCS 88 #if INCLUDE_ALL_GCS
98 // Overrides. 89 // Overrides.
99 virtual oop par_promote(int thread_num, 90 virtual oop par_promote(int thread_num,
100 oop obj, markOop m, size_t word_sz); 91 oop obj, markOop m, size_t word_sz);