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src/share/vm/gc_implementation/g1/concurrentMark.cpp

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rev 7191 : 8058354: SPECjvm2008-Derby -2.7% performance regression on Solaris-X64 starting with 9-b29
Summary: Allow use of large pages for auxiliary data structures in G1. Clean up existing interfaces.
Reviewed-by: jmasa, pliden, stefank


  97 int CMBitMapRO::heapWordDiffToOffsetDiff(size_t diff) const {
  98   assert((diff & ((1 << _shifter) - 1)) == 0, "argument check");
  99   return (int) (diff >> _shifter);
 100 }
 101 
 102 #ifndef PRODUCT
 103 bool CMBitMapRO::covers(MemRegion heap_rs) const {
 104   // assert(_bm.map() == _virtual_space.low(), "map inconsistency");
 105   assert(((size_t)_bm.size() * ((size_t)1 << _shifter)) == _bmWordSize,
 106          "size inconsistency");
 107   return _bmStartWord == (HeapWord*)(heap_rs.start()) &&
 108          _bmWordSize  == heap_rs.word_size();
 109 }
 110 #endif
 111 
 112 void CMBitMapRO::print_on_error(outputStream* st, const char* prefix) const {
 113   _bm.print_on_error(st, prefix);
 114 }
 115 
 116 size_t CMBitMap::compute_size(size_t heap_size) {
 117   return heap_size / mark_distance();
 118 }
 119 
 120 size_t CMBitMap::mark_distance() {
 121   return MinObjAlignmentInBytes * BitsPerByte;
 122 }
 123 
 124 void CMBitMap::initialize(MemRegion heap, G1RegionToSpaceMapper* storage) {
 125   _bmStartWord = heap.start();
 126   _bmWordSize = heap.word_size();
 127 
 128   _bm.set_map((BitMap::bm_word_t*) storage->reserved().start());
 129   _bm.set_size(_bmWordSize >> _shifter);
 130 
 131   storage->set_mapping_changed_listener(&_listener);
 132 }
 133 
 134 void CMBitMapMappingChangedListener::on_commit(uint start_region, size_t num_regions, bool zero_filled) {
 135   if (zero_filled) {
 136     return;
 137   }




  97 int CMBitMapRO::heapWordDiffToOffsetDiff(size_t diff) const {
  98   assert((diff & ((1 << _shifter) - 1)) == 0, "argument check");
  99   return (int) (diff >> _shifter);
 100 }
 101 
 102 #ifndef PRODUCT
 103 bool CMBitMapRO::covers(MemRegion heap_rs) const {
 104   // assert(_bm.map() == _virtual_space.low(), "map inconsistency");
 105   assert(((size_t)_bm.size() * ((size_t)1 << _shifter)) == _bmWordSize,
 106          "size inconsistency");
 107   return _bmStartWord == (HeapWord*)(heap_rs.start()) &&
 108          _bmWordSize  == heap_rs.word_size();
 109 }
 110 #endif
 111 
 112 void CMBitMapRO::print_on_error(outputStream* st, const char* prefix) const {
 113   _bm.print_on_error(st, prefix);
 114 }
 115 
 116 size_t CMBitMap::compute_size(size_t heap_size) {
 117   return ReservedSpace::allocation_align_size_up(heap_size / mark_distance());
 118 }
 119 
 120 size_t CMBitMap::mark_distance() {
 121   return MinObjAlignmentInBytes * BitsPerByte;
 122 }
 123 
 124 void CMBitMap::initialize(MemRegion heap, G1RegionToSpaceMapper* storage) {
 125   _bmStartWord = heap.start();
 126   _bmWordSize = heap.word_size();
 127 
 128   _bm.set_map((BitMap::bm_word_t*) storage->reserved().start());
 129   _bm.set_size(_bmWordSize >> _shifter);
 130 
 131   storage->set_mapping_changed_listener(&_listener);
 132 }
 133 
 134 void CMBitMapMappingChangedListener::on_commit(uint start_region, size_t num_regions, bool zero_filled) {
 135   if (zero_filled) {
 136     return;
 137   }
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