229   // have been allocated in this part since the last mark phase.
 230   // "prev" is the top at the start of the last completed marking.
 231   // "next" is the top at the start of the in-progress marking (if any.)
 232   HeapWord* _prev_top_at_mark_start;
 233   HeapWord* _next_top_at_mark_start;
 234 
 235   // We use concurrent marking to determine the amount of live data
 236   // in each heap region.
 237   size_t _prev_marked_bytes;    // Bytes known to be live via last completed marking.
 238   size_t _next_marked_bytes;    // Bytes known to be live via in-progress marking.
 239 
 240   void init_top_at_mark_start() {
 241     assert(_prev_marked_bytes == 0 &&
 242            _next_marked_bytes == 0,
 243            "Must be called after zero_marked_bytes.");
 244     _prev_top_at_mark_start = _next_top_at_mark_start = bottom();
 245   }
 246 
 247   // Data for young region survivor prediction.
 248   uint  _young_index_in_cset;
 249   SurvRateGroup* _surv_rate_group;
 250   int  _age_index;
 251 
 252   // Cached attributes used in the collection set policy information
 253 
 254   // The calculated GC efficiency of the region.
 255   double _gc_efficiency;
 256 
 257   uint _node_index;
 258 
 259   void report_region_type_change(G1HeapRegionTraceType::Type to);
 260 
 261   // Returns whether the given object address refers to a dead object, and either the
 262   // size of the object (if live) or the size of the block (if dead) in size.
 263   // May
 264   // - only called with obj < top()
 265   // - not called on humongous objects or archive regions
 266   inline bool is_obj_dead_with_size(const oop obj, const G1CMBitMap* const prev_bitmap, size_t* size) const;
 267 
 268   // Iterate over the references covered by the given MemRegion in a humongous
 269   // object and apply the given closure to them.

 527 
 528   void calc_gc_efficiency(void);
 529   double gc_efficiency() const { return _gc_efficiency;}
 530 
 531   uint  young_index_in_cset() const { return _young_index_in_cset; }
 532   void clear_young_index_in_cset() { _young_index_in_cset = 0; }
 533   void set_young_index_in_cset(uint index) {
 534     assert(index != UINT_MAX, "just checking");
 535     assert(index != 0, "just checking");
 536     assert(is_young(), "pre-condition");
 537     _young_index_in_cset = index;
 538   }
 539 
 540   int age_in_surv_rate_group() const;
 541   bool has_valid_age_in_surv_rate() const;
 542 
 543   bool has_surv_rate_group() const;
 544   
 545   double surv_rate_prediction(G1Predictions const& predictor) const;
 546 
 547   void install_surv_rate_group(SurvRateGroup* surv_rate_group);
 548   void uninstall_surv_rate_group();
 549 
 550   void record_surv_words_in_group(size_t words_survived);
 551 
 552   // Determine if an object has been allocated since the last
 553   // mark performed by the collector. This returns true iff the object
 554   // is within the unmarked area of the region.
 555   bool obj_allocated_since_prev_marking(oop obj) const {
 556     return (HeapWord *) obj >= prev_top_at_mark_start();
 557   }
 558   bool obj_allocated_since_next_marking(oop obj) const {
 559     return (HeapWord *) obj >= next_top_at_mark_start();
 560   }
 561 
 562   // Iterate over the objects overlapping the given memory region, applying cl
 563   // to all references in the region.  This is a helper for
 564   // G1RemSet::refine_card*, and is tightly coupled with them.
 565   // mr must not be empty. Must be trimmed to the allocated/parseable space in this region.
 566   // This region must be old or humongous.
 567   // Returns the next unscanned address if the designated objects were successfully

 229   // have been allocated in this part since the last mark phase.
 230   // "prev" is the top at the start of the last completed marking.
 231   // "next" is the top at the start of the in-progress marking (if any.)
 232   HeapWord* _prev_top_at_mark_start;
 233   HeapWord* _next_top_at_mark_start;
 234 
 235   // We use concurrent marking to determine the amount of live data
 236   // in each heap region.
 237   size_t _prev_marked_bytes;    // Bytes known to be live via last completed marking.
 238   size_t _next_marked_bytes;    // Bytes known to be live via in-progress marking.
 239 
 240   void init_top_at_mark_start() {
 241     assert(_prev_marked_bytes == 0 &&
 242            _next_marked_bytes == 0,
 243            "Must be called after zero_marked_bytes.");
 244     _prev_top_at_mark_start = _next_top_at_mark_start = bottom();
 245   }
 246 
 247   // Data for young region survivor prediction.
 248   uint  _young_index_in_cset;
 249   G1SurvRateGroup* _surv_rate_group;
 250   int  _age_index;
 251 
 252   // Cached attributes used in the collection set policy information
 253 
 254   // The calculated GC efficiency of the region.
 255   double _gc_efficiency;
 256 
 257   uint _node_index;
 258 
 259   void report_region_type_change(G1HeapRegionTraceType::Type to);
 260 
 261   // Returns whether the given object address refers to a dead object, and either the
 262   // size of the object (if live) or the size of the block (if dead) in size.
 263   // May
 264   // - only called with obj < top()
 265   // - not called on humongous objects or archive regions
 266   inline bool is_obj_dead_with_size(const oop obj, const G1CMBitMap* const prev_bitmap, size_t* size) const;
 267 
 268   // Iterate over the references covered by the given MemRegion in a humongous
 269   // object and apply the given closure to them.

 527 
 528   void calc_gc_efficiency(void);
 529   double gc_efficiency() const { return _gc_efficiency;}
 530 
 531   uint  young_index_in_cset() const { return _young_index_in_cset; }
 532   void clear_young_index_in_cset() { _young_index_in_cset = 0; }
 533   void set_young_index_in_cset(uint index) {
 534     assert(index != UINT_MAX, "just checking");
 535     assert(index != 0, "just checking");
 536     assert(is_young(), "pre-condition");
 537     _young_index_in_cset = index;
 538   }
 539 
 540   int age_in_surv_rate_group() const;
 541   bool has_valid_age_in_surv_rate() const;
 542 
 543   bool has_surv_rate_group() const;
 544   
 545   double surv_rate_prediction(G1Predictions const& predictor) const;
 546 
 547   void install_surv_rate_group(G1SurvRateGroup* surv_rate_group);
 548   void uninstall_surv_rate_group();
 549 
 550   void record_surv_words_in_group(size_t words_survived);
 551 
 552   // Determine if an object has been allocated since the last
 553   // mark performed by the collector. This returns true iff the object
 554   // is within the unmarked area of the region.
 555   bool obj_allocated_since_prev_marking(oop obj) const {
 556     return (HeapWord *) obj >= prev_top_at_mark_start();
 557   }
 558   bool obj_allocated_since_next_marking(oop obj) const {
 559     return (HeapWord *) obj >= next_top_at_mark_start();
 560   }
 561 
 562   // Iterate over the objects overlapping the given memory region, applying cl
 563   // to all references in the region.  This is a helper for
 564   // G1RemSet::refine_card*, and is tightly coupled with them.
 565   // mr must not be empty. Must be trimmed to the allocated/parseable space in this region.
 566   // This region must be old or humongous.
 567   // Returns the next unscanned address if the designated objects were successfully