jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/g1/concurrentMarkThread.hpp@15c5903cf9e1

6865703: G1: Parallelize hot card cache cleanup
Summary: Have the GC worker threads clear the hot card cache in parallel by having each worker thread claim a chunk of the card cache and process the cards in that chunk. The size of the chunks that each thread will claim is determined at VM initialization from the size of the card cache and the number of worker threads.
Reviewed-by: jmasa, tonyp

     1 /*

     2  * Copyright 2001-2009 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 // The Concurrent Mark GC Thread (could be several in the future).

    26 // This is copied from the Concurrent Mark Sweep GC Thread

    27 // Still under construction.

    29 class ConcurrentMark;

    31 class ConcurrentMarkThread: public ConcurrentGCThread {

    32   friend class VMStructs;

    34   double _vtime_start;  // Initial virtual time.

    35   double _vtime_accum;  // Accumulated virtual time.

    37   double _vtime_mark_accum;

    38   double _vtime_count_accum;

    40  public:

    41   virtual void run();

    43  private:

    44   ConcurrentMark*                  _cm;

    45   bool                             _started;

    46   bool                             _in_progress;

    48   void sleepBeforeNextCycle();

    50   static SurrogateLockerThread*         _slt;

    52  public:

    53   // Constructor

    54   ConcurrentMarkThread(ConcurrentMark* cm);

    56   static void makeSurrogateLockerThread(TRAPS);

    57   static SurrogateLockerThread* slt() { return _slt; }

    59   // Printing

    60   void print();

    62   // Total virtual time so far.

    63   double vtime_accum();

    64   // Marking virtual time so far

    65   double vtime_mark_accum();

    66   // Counting virtual time so far.

    67   double vtime_count_accum() { return _vtime_count_accum; }

    69   ConcurrentMark* cm()                           { return _cm;     }

    71   void            set_started()                  { _started = true;   }

    72   void            clear_started()                { _started = false;  }

    73   bool            started()                      { return _started;   }

    75   void            set_in_progress()              { _in_progress = true;   }

    76   void            clear_in_progress()            { _in_progress = false;  }

    77   bool            in_progress()                  { return _in_progress;   }

    79   // Yield for GC

    80   void            yield();

    82   // shutdown

    83   void stop();

    84 };

Mercurial > jdk8-mips64-public > hotspot / file revision

src/share/vm/gc_implementation/g1/concurrentMarkThread.hpp@15c5903cf9e1

src/share/vm/gc_implementation/g1/concurrentMarkThread.hpp