1 /*
   2  * Copyright (c) 2001, 2019, 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.
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   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
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  24 
  25 #ifndef SHARE_GC_G1_G1CONCURRENTREFINETHREAD_HPP
  26 #define SHARE_GC_G1_G1CONCURRENTREFINETHREAD_HPP
  27 
  28 #include "gc/shared/concurrentGCThread.hpp"
  29 #include "utilities/ticks.hpp"
  30 
  31 // Forward Decl.
  32 class G1ConcurrentRefine;
  33 
  34 // One or more G1 Concurrent Refinement Threads may be active if concurrent
  35 // refinement is in progress.
  36 class G1ConcurrentRefineThread: public ConcurrentGCThread {
  37   friend class VMStructs;
  38   friend class G1CollectedHeap;
  39 
  40   double _vtime_start;  // Initial virtual time.
  41   double _vtime_accum;  // Accumulated virtual time.
  42 
  43   Tickspan _total_refinement_time;
  44   size_t _total_refined_cards;
  45 
  46   uint _worker_id;
  47 
  48   bool _active;
  49   Monitor* _monitor;
  50   G1ConcurrentRefine* _cr;
  51 
  52   void wait_for_completed_buffers();
  53 
  54   void set_active(bool x) { _active = x; }
  55   // Deactivate this thread.
  56   void deactivate();
  57 
  58   bool is_primary() { return (_worker_id == 0); }
  59 
  60   void run_service();
  61   void stop_service();
  62 public:
  63   G1ConcurrentRefineThread(G1ConcurrentRefine* cg1r, uint worker_id);
  64 
  65   bool is_active();
  66   // Activate this thread.
  67   void activate();
  68 
  69   Tickspan total_refinement_time() const { return _total_refinement_time; }
  70   size_t total_refined_cards() const { return _total_refined_cards; }
  71 
  72   // Total virtual time so far.
  73   double vtime_accum() { return _vtime_accum; }
  74 };
  75 
  76 #endif // SHARE_GC_G1_G1CONCURRENTREFINETHREAD_HPP