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src/hotspot/share/gc/g1/g1ConcurrentRefineThread.hpp

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rev 47675 : [mq]: 8149127-rename-concurrentrefine-a
rev 47676 : imported patch 8149127-rename-concurrentrefine-b
rev 47677 : [mq]: 8149127-rename-concurrentrefine-b-stefanj-review
   1 /*
   2  * Copyright (c) 2001, 2016, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  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_G1_CONCURRENTG1REFINETHREAD_HPP
  26 #define SHARE_VM_GC_G1_CONCURRENTG1REFINETHREAD_HPP
  27 
  28 #include "gc/g1/dirtyCardQueue.hpp"
  29 #include "gc/shared/concurrentGCThread.hpp"
  30 
  31 // Forward Decl.
  32 class CardTableEntryClosure;
  33 class ConcurrentG1Refine;
  34 
  35 // One or more G1 Concurrent Refinement Threads may be active if concurrent
  36 // refinement is in progress.
  37 class ConcurrentG1RefineThread: public ConcurrentGCThread {
  38   friend class VMStructs;
  39   friend class G1CollectedHeap;
  40 
  41   double _vtime_start;  // Initial virtual time.
  42   double _vtime_accum;  // Accumulated virtual time.
  43   uint _worker_id;
  44   uint _worker_id_offset;
  45 
  46   // The refinement threads collection is linked list. A predecessor can activate a successor
  47   // when the number of the rset update buffer crosses a certain threshold. A successor
  48   // would self-deactivate when the number of the buffers falls below the threshold.
  49   bool _active;
  50   ConcurrentG1RefineThread* _next;
  51   Monitor* _monitor;
  52   ConcurrentG1Refine* _cg1r;
  53 
  54   // This thread's activation/deactivation thresholds
  55   size_t _activation_threshold;
  56   size_t _deactivation_threshold;
  57 
  58   void wait_for_completed_buffers();
  59 
  60   void set_active(bool x) { _active = x; }
  61   bool is_active();
  62   void activate();
  63   void deactivate();
  64 
  65   bool is_primary() { return (_worker_id == 0); }
  66 
  67   void run_service();
  68   void stop_service();
  69 
  70 public:
  71   // Constructor
  72   ConcurrentG1RefineThread(ConcurrentG1Refine* cg1r, ConcurrentG1RefineThread* next,
  73                            uint worker_id_offset, uint worker_id,
  74                            size_t activate, size_t deactivate);
  75 
  76   void update_thresholds(size_t activate, size_t deactivate);
  77   size_t activation_threshold() const { return _activation_threshold; }
  78 
  79   // Total virtual time so far.
  80   double vtime_accum() { return _vtime_accum; }
  81 
  82   ConcurrentG1Refine* cg1r() { return _cg1r;     }
  83 };
  84 
  85 #endif // SHARE_VM_GC_G1_CONCURRENTG1REFINETHREAD_HPP
   1 /*
   2  * Copyright (c) 2001, 2017, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  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_G1_G1CONCURRENTREFINETHREAD_HPP
  26 #define SHARE_VM_GC_G1_G1CONCURRENTREFINETHREAD_HPP
  27 
  28 #include "gc/g1/dirtyCardQueue.hpp"
  29 #include "gc/shared/concurrentGCThread.hpp"
  30 
  31 // Forward Decl.
  32 class CardTableEntryClosure;
  33 class G1ConcurrentRefine;
  34 
  35 // One or more G1 Concurrent Refinement Threads may be active if concurrent
  36 // refinement is in progress.
  37 class G1ConcurrentRefineThread: public ConcurrentGCThread {
  38   friend class VMStructs;
  39   friend class G1CollectedHeap;
  40 
  41   double _vtime_start;  // Initial virtual time.
  42   double _vtime_accum;  // Accumulated virtual time.
  43   uint _worker_id;
  44   uint _worker_id_offset;
  45 
  46   // The refinement threads collection is linked list. A predecessor can activate a successor
  47   // when the number of the rset update buffer crosses a certain threshold. A successor
  48   // would self-deactivate when the number of the buffers falls below the threshold.
  49   bool _active;
  50   G1ConcurrentRefineThread* _next;
  51   Monitor* _monitor;
  52   G1ConcurrentRefine* _cr;
  53 
  54   // This thread's activation/deactivation thresholds
  55   size_t _activation_threshold;
  56   size_t _deactivation_threshold;
  57 
  58   void wait_for_completed_buffers();
  59 
  60   void set_active(bool x) { _active = x; }
  61   bool is_active();
  62   void activate();
  63   void deactivate();
  64 
  65   bool is_primary() { return (_worker_id == 0); }
  66 
  67   void run_service();
  68   void stop_service();
  69 
  70 public:
  71   // Constructor
  72   G1ConcurrentRefineThread(G1ConcurrentRefine* cr, G1ConcurrentRefineThread* next,
  73                            uint worker_id_offset, uint worker_id,
  74                            size_t activate, size_t deactivate);
  75 
  76   void update_thresholds(size_t activate, size_t deactivate);
  77   size_t activation_threshold() const { return _activation_threshold; }
  78 
  79   // Total virtual time so far.
  80   double vtime_accum() { return _vtime_accum; }
  81 
  82   G1ConcurrentRefine* cr() { return _cr;     }
  83 };
  84 
  85 #endif // SHARE_VM_GC_G1_G1CONCURRENTREFINETHREAD_HPP
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