11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_CONCURRENTG1REFINETHREAD_HPP
  26 #define SHARE_VM_GC_IMPLEMENTATION_G1_CONCURRENTG1REFINETHREAD_HPP
  27 
  28 #include "gc_implementation/shared/concurrentGCThread.hpp"
  29 
  30 // Forward Decl.

  31 class ConcurrentG1Refine;
  32 
  33 // The G1 Concurrent Refinement Thread (could be several in the future).
  34 
  35 class ConcurrentG1RefineThread: public ConcurrentGCThread {
  36   friend class VMStructs;
  37   friend class G1CollectedHeap;
  38 
  39   double _vtime_start;  // Initial virtual time.
  40   double _vtime_accum;  // Initial virtual time.
  41   uint _worker_id;
  42   uint _worker_id_offset;
  43 
  44   // The refinement threads collection is linked list. A predecessor can activate a successor
  45   // when the number of the rset update buffer crosses a certain threshold. A successor
  46   // would self-deactivate when the number of the buffers falls below the threshold.
  47   bool _active;
  48   ConcurrentG1RefineThread* _next;
  49   Monitor* _monitor;
  50   ConcurrentG1Refine* _cg1r;
  51 



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

  71                            uint worker_id_offset, uint worker_id);
  72 
  73   void initialize();
  74 
  75   // Printing
  76   void print() const;
  77   void print_on(outputStream* st) const;
  78 
  79   // Total virtual time so far.
  80   double vtime_accum() { return _vtime_accum; }
  81 
  82   ConcurrentG1Refine* cg1r() { return _cg1r;     }
  83 
  84   // shutdown
  85   void stop();
  86 };
  87 
  88 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_CONCURRENTG1REFINETHREAD_HPP

  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_CONCURRENTG1REFINETHREAD_HPP
  26 #define SHARE_VM_GC_IMPLEMENTATION_G1_CONCURRENTG1REFINETHREAD_HPP
  27 
  28 #include "gc_implementation/shared/concurrentGCThread.hpp"
  29 
  30 // Forward Decl.
  31 class CardTableEntryClosure;
  32 class ConcurrentG1Refine;
  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   // Printing
  81   void print() const;
  82   void print_on(outputStream* st) const;
  83 
  84   // Total virtual time so far.
  85   double vtime_accum() { return _vtime_accum; }
  86 
  87   ConcurrentG1Refine* cg1r() { return _cg1r;     }
  88 
  89   // shutdown
  90   void stop();
  91 };
  92 
  93 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_CONCURRENTG1REFINETHREAD_HPP