jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/g1/concurrentG1RefineThread.hpp@96b229c54d1e

     1 /*

     2  * Copyright 2001-2007 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    20  * CA 95054 USA or visit www.sun.com if you need additional information or

    21  * have any questions.

    22  *

    23  */

    25 // Forward Decl.

    26 class ConcurrentG1Refine;

    28 // The G1 Concurrent Refinement Thread (could be several in the future).

    30 class ConcurrentG1RefineThread: public ConcurrentGCThread {

    31   friend class VMStructs;

    32   friend class G1CollectedHeap;

    34   double _vtime_start;  // Initial virtual time.

    35   double _vtime_accum;  // Initial virtual time.

    37  public:

    38   virtual void run();

    40  private:

    41   ConcurrentG1Refine*              _cg1r;

    42   bool                             _started;

    43   bool                             _in_progress;

    44   volatile bool                    _restart;

    46   COTracker                        _co_tracker;

    47   double                           _interval_ms;

    49   bool                             _do_traversal;

    51   void decreaseInterval(int processing_time_ms) {

    52     double min_interval_ms = (double) processing_time_ms;

    53     _interval_ms = 0.8 * _interval_ms;

    54     if (_interval_ms < min_interval_ms)

    55       _interval_ms = min_interval_ms;

    56   }

    57   void increaseInterval(int processing_time_ms) {

    58     double max_interval_ms = 9.0 * (double) processing_time_ms;

    59     _interval_ms = 1.1 * _interval_ms;

    60     if (max_interval_ms > 0 && _interval_ms > max_interval_ms)

    61       _interval_ms = max_interval_ms;

    62   }

    64   void sleepBeforeNextCycle();

    66   void traversalBasedRefinement();

    68   void queueBasedRefinement();

    70   // For use by G1CollectedHeap, which is a friend.

    71   static SuspendibleThreadSet* sts() { return &_sts; }

    73  public:

    74   // Constructor

    75   ConcurrentG1RefineThread(ConcurrentG1Refine* cg1r);

    77   // Printing

    78   void print();

    80   // Total virtual time so far.

    81   double vtime_accum() { return _vtime_accum; }

    83   ConcurrentG1Refine* cg1r()                     { return _cg1r;     }

    86   void            set_started()                  { _started = true;   }

    87   void            clear_started()                { _started = false;  }

    88   bool            started()                      { return _started;   }

    90   void            set_in_progress()              { _in_progress = true;   }

    91   void            clear_in_progress()            { _in_progress = false;  }

    92   bool            in_progress()                  { return _in_progress;   }

    94   void            set_do_traversal(bool b);

    95   bool            do_traversal() { return _do_traversal; }

    97   void            sample_young_list_rs_lengths();

    99   // Yield for GC

   100   void            yield();

   102   // shutdown

   103   static void stop();

   104 };

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