700   double _bootstrap_occupancy;
 701 
 702   // timer
 703   elapsedTimer _timer;
 704 
 705   // Timing, allocation and promotion statistics, used for scheduling.
 706   CMSStats      _stats;
 707 
 708   // Allocation limits installed in the young gen, used only in
 709   // CMSIncrementalMode.  When an allocation in the young gen would cross one of
 710   // these limits, the cms generation is notified and the cms thread is started
 711   // or stopped, respectively.
 712   HeapWord*     _icms_start_limit;
 713   HeapWord*     _icms_stop_limit;
 714 
 715   enum CMS_op_type {
 716     CMS_op_checkpointRootsInitial,
 717     CMS_op_checkpointRootsFinal
 718   };
 719 
 720   void do_CMS_operation(CMS_op_type op);
 721   bool stop_world_and_do(CMS_op_type op);
 722 
 723   OopTaskQueueSet* task_queues() { return _task_queues; }
 724   int*             hash_seed(int i) { return &_hash_seed[i]; }
 725   YieldingFlexibleWorkGang* conc_workers() { return _conc_workers; }
 726 
 727   // Support for parallelizing Eden rescan in CMS remark phase
 728   void sample_eden(); // ... sample Eden space top
 729 
 730  private:
 731   // Support for parallelizing young gen rescan in CMS remark phase
 732   Generation* _young_gen;  // the younger gen
 733   HeapWord** _top_addr;    // ... Top of Eden
 734   HeapWord** _end_addr;    // ... End of Eden
 735   HeapWord** _eden_chunk_array; // ... Eden partitioning array
 736   size_t     _eden_chunk_index; // ... top (exclusive) of array
 737   size_t     _eden_chunk_capacity;  // ... max entries in array
 738 
 739   // Support for parallelizing survivor space rescan
 740   HeapWord** _survivor_chunk_array;

 700   double _bootstrap_occupancy;
 701 
 702   // timer
 703   elapsedTimer _timer;
 704 
 705   // Timing, allocation and promotion statistics, used for scheduling.
 706   CMSStats      _stats;
 707 
 708   // Allocation limits installed in the young gen, used only in
 709   // CMSIncrementalMode.  When an allocation in the young gen would cross one of
 710   // these limits, the cms generation is notified and the cms thread is started
 711   // or stopped, respectively.
 712   HeapWord*     _icms_start_limit;
 713   HeapWord*     _icms_stop_limit;
 714 
 715   enum CMS_op_type {
 716     CMS_op_checkpointRootsInitial,
 717     CMS_op_checkpointRootsFinal
 718   };
 719 
 720   void do_CMS_operation(CMS_op_type op, GCCause::Cause gc_cause);
 721   bool stop_world_and_do(CMS_op_type op);
 722 
 723   OopTaskQueueSet* task_queues() { return _task_queues; }
 724   int*             hash_seed(int i) { return &_hash_seed[i]; }
 725   YieldingFlexibleWorkGang* conc_workers() { return _conc_workers; }
 726 
 727   // Support for parallelizing Eden rescan in CMS remark phase
 728   void sample_eden(); // ... sample Eden space top
 729 
 730  private:
 731   // Support for parallelizing young gen rescan in CMS remark phase
 732   Generation* _young_gen;  // the younger gen
 733   HeapWord** _top_addr;    // ... Top of Eden
 734   HeapWord** _end_addr;    // ... End of Eden
 735   HeapWord** _eden_chunk_array; // ... Eden partitioning array
 736   size_t     _eden_chunk_index; // ... top (exclusive) of array
 737   size_t     _eden_chunk_capacity;  // ... max entries in array
 738 
 739   // Support for parallelizing survivor space rescan
 740   HeapWord** _survivor_chunk_array;