33 
  34 // The G1 Concurrent Refinement Thread (could be several in the future).
  35 
  36 class ConcurrentG1RefineThread: public ConcurrentGCThread {
  37   friend class VMStructs;
  38   friend class G1CollectedHeap;
  39 
  40   double _vtime_start;  // Initial virtual time.
  41   double _vtime_accum;  // Initial virtual time.
  42   uint _worker_id;
  43   uint _worker_id_offset;
  44 
  45   // The refinement threads collection is linked list. A predecessor can activate a successor
  46   // when the number of the rset update buffer crosses a certain threshold. A successor
  47   // would self-deactivate when the number of the buffers falls below the threshold.
  48   bool _active;
  49   ConcurrentG1RefineThread* _next;
  50   Monitor* _monitor;
  51   ConcurrentG1Refine* _cg1r;
  52 
  53   // The closure applied to completed log buffers.
  54   CardTableEntryClosure* _refine_closure;
  55 
  56   int _thread_threshold_step;
  57   // This thread activation threshold
  58   int _threshold;
  59   // This thread deactivation threshold
  60   int _deactivation_threshold;
  61 
  62   void sample_young_list_rs_lengths();
  63   void run_young_rs_sampling();
  64   void wait_for_completed_buffers();
  65 
  66   void set_active(bool x) { _active = x; }
  67   bool is_active();
  68   void activate();
  69   void deactivate();
  70 
  71 public:
  72   virtual void run();
  73   // Constructor
  74   ConcurrentG1RefineThread(ConcurrentG1Refine* cg1r, ConcurrentG1RefineThread* next,
  75                            CardTableEntryClosure* refine_closure,
  76                            uint worker_id_offset, uint worker_id);
  77 
  78   void initialize();
  79 
  80   // Total virtual time so far.
  81   double vtime_accum() { return _vtime_accum; }
  82 
  83   ConcurrentG1Refine* cg1r() { return _cg1r;     }
  84 
  85   // shutdown
  86   void stop();
  87 };
  88 
  89 #endif // SHARE_VM_GC_G1_CONCURRENTG1REFINETHREAD_HPP

  33 
  34 // The G1 Concurrent Refinement Thread (could be several in the future).
  35 
  36 class ConcurrentG1RefineThread: public ConcurrentGCThread {
  37   friend class VMStructs;
  38   friend class G1CollectedHeap;
  39 
  40   double _vtime_start;  // Initial virtual time.
  41   double _vtime_accum;  // Initial virtual time.
  42   uint _worker_id;
  43   uint _worker_id_offset;
  44 
  45   // The refinement threads collection is linked list. A predecessor can activate a successor
  46   // when the number of the rset update buffer crosses a certain threshold. A successor
  47   // would self-deactivate when the number of the buffers falls below the threshold.
  48   bool _active;
  49   ConcurrentG1RefineThread* _next;
  50   Monitor* _monitor;
  51   ConcurrentG1Refine* _cg1r;
  52 



  53   int _thread_threshold_step;
  54   // This thread activation threshold
  55   int _threshold;
  56   // This thread deactivation threshold
  57   int _deactivation_threshold;
  58 
  59   void sample_young_list_rs_lengths();
  60   void run_young_rs_sampling();
  61   void wait_for_completed_buffers();
  62 
  63   void set_active(bool x) { _active = x; }
  64   bool is_active();
  65   void activate();
  66   void deactivate();
  67 
  68 public:
  69   virtual void run();
  70   // Constructor
  71   ConcurrentG1RefineThread(ConcurrentG1Refine* cg1r, ConcurrentG1RefineThread* next,

  72                            uint worker_id_offset, uint worker_id);
  73 
  74   void initialize();
  75 
  76   // Total virtual time so far.
  77   double vtime_accum() { return _vtime_accum; }
  78 
  79   ConcurrentG1Refine* cg1r() { return _cg1r;     }
  80 
  81   // shutdown
  82   void stop();
  83 };
  84 
  85 #endif // SHARE_VM_GC_G1_CONCURRENTG1REFINETHREAD_HPP