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comparison src/share/vm/gc_implementation/parallelScavenge/psScavenge.cpp @ 10370:47bdfb3d010f

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8015486: PSScavenge::is_obj_in_young is unnecessarily slow with UseCompressedOops Summary: Compare compressed oops to a compressed young gen boundary instead of uncompressing the oops before doing the young gen boundary check. Reviewed-by: brutisso, jmasa
author stefank
date Thu, 30 May 2013 10:58:16 +0200
parents 8dbc025ff709
children f2110083203d
comparison
equal deleted inserted replaced
10369:5534bd30c151 10370:47bdfb3d010f
59 ReferenceProcessor* PSScavenge::_ref_processor = NULL; 59 ReferenceProcessor* PSScavenge::_ref_processor = NULL;
60 CardTableExtension* PSScavenge::_card_table = NULL; 60 CardTableExtension* PSScavenge::_card_table = NULL;
61 bool PSScavenge::_survivor_overflow = false; 61 bool PSScavenge::_survivor_overflow = false;
62 uint PSScavenge::_tenuring_threshold = 0; 62 uint PSScavenge::_tenuring_threshold = 0;
63 HeapWord* PSScavenge::_young_generation_boundary = NULL; 63 HeapWord* PSScavenge::_young_generation_boundary = NULL;
64 uintptr_t PSScavenge::_young_generation_boundary_compressed = 0;
64 elapsedTimer PSScavenge::_accumulated_time; 65 elapsedTimer PSScavenge::_accumulated_time;
65 Stack<markOop, mtGC> PSScavenge::_preserved_mark_stack; 66 Stack<markOop, mtGC> PSScavenge::_preserved_mark_stack;
66 Stack<oop, mtGC> PSScavenge::_preserved_oop_stack; 67 Stack<oop, mtGC> PSScavenge::_preserved_oop_stack;
67 CollectorCounters* PSScavenge::_counters = NULL; 68 CollectorCounters* PSScavenge::_counters = NULL;
68 bool PSScavenge::_promotion_failed = false; 69 bool PSScavenge::_promotion_failed = false;
69 70
70 // Define before use 71 // Define before use
71 class PSIsAliveClosure: public BoolObjectClosure { 72 class PSIsAliveClosure: public BoolObjectClosure {
72 public: 73 public:
73 bool do_object_b(oop p) { 74 bool do_object_b(oop p) {
74 return (!PSScavenge::is_obj_in_young((HeapWord*) p)) || p->is_forwarded(); 75 return (!PSScavenge::is_obj_in_young(p)) || p->is_forwarded();
75 } 76 }
76 }; 77 };
77 78
78 PSIsAliveClosure PSScavenge::_is_alive_closure; 79 PSIsAliveClosure PSScavenge::_is_alive_closure;
79 80
813 PSOldGen* old_gen = heap->old_gen(); 814 PSOldGen* old_gen = heap->old_gen();
814 815
815 // Set boundary between young_gen and old_gen 816 // Set boundary between young_gen and old_gen
816 assert(old_gen->reserved().end() <= young_gen->eden_space()->bottom(), 817 assert(old_gen->reserved().end() <= young_gen->eden_space()->bottom(),
817 "old above young"); 818 "old above young");
818 _young_generation_boundary = young_gen->eden_space()->bottom(); 819 set_young_generation_boundary(young_gen->eden_space()->bottom());
819 820
820 // Initialize ref handling object for scavenging. 821 // Initialize ref handling object for scavenging.
821 MemRegion mr = young_gen->reserved(); 822 MemRegion mr = young_gen->reserved();
822 823
823 _ref_processor = 824 _ref_processor =