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comparison src/share/vm/memory/genCollectedHeap.cpp @ 1166:7b0e9cba0307

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6896647: card marks can be deferred too long Summary: Deferred card marks are now flushed during the gc prologue. Parallel[Scavege,OldGC] and SerialGC no longer defer card marks generated by COMPILER2 as a result of ReduceInitialCardMarks. For these cases, introduced a diagnostic option to defer the card marks, only for the purposes of testing and diagnostics. CMS and G1 continue to defer card marks. Potential performance concern related to single-threaded flushing of deferred card marks in the gc prologue will be addressed in the future. Reviewed-by: never, johnc
author ysr
date Wed, 13 Jan 2010 15:26:39 -0800
parents 148e5441d916
children c4d722788ed6
comparison
equal deleted inserted replaced
1165:2dd52dea6d28 1166:7b0e9cba0307
49 assert(policy != NULL, "Sanity check"); 49 assert(policy != NULL, "Sanity check");
50 _preloading_shared_classes = false; 50 _preloading_shared_classes = false;
51 } 51 }
52 52
53 jint GenCollectedHeap::initialize() { 53 jint GenCollectedHeap::initialize() {
54 CollectedHeap::pre_initialize();
55
54 int i; 56 int i;
55 _n_gens = gen_policy()->number_of_generations(); 57 _n_gens = gen_policy()->number_of_generations();
56 58
57 // While there are no constraints in the GC code that HeapWordSize 59 // While there are no constraints in the GC code that HeapWordSize
58 // be any particular value, there are multiple other areas in the 60 // be any particular value, there are multiple other areas in the
127 - perm_gen_spec->misc_code_size(); 129 - perm_gen_spec->misc_code_size();
128 _reserved.set_end((HeapWord*)(heap_rs.base() + actual_heap_size)); 130 _reserved.set_end((HeapWord*)(heap_rs.base() + actual_heap_size));
129 131
130 _rem_set = collector_policy()->create_rem_set(_reserved, n_covered_regions); 132 _rem_set = collector_policy()->create_rem_set(_reserved, n_covered_regions);
131 set_barrier_set(rem_set()->bs()); 133 set_barrier_set(rem_set()->bs());
134
132 _gch = this; 135 _gch = this;
133 136
134 for (i = 0; i < _n_gens; i++) { 137 for (i = 0; i < _n_gens; i++) {
135 ReservedSpace this_rs = heap_rs.first_part(_gen_specs[i]->max_size(), 138 ReservedSpace this_rs = heap_rs.first_part(_gen_specs[i]->max_size(),
136 UseSharedSpaces, UseSharedSpaces); 139 UseSharedSpaces, UseSharedSpaces);