jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/g1/concurrentG1RefineThread.hpp@1316cec51b4d

6819061: G1: eliminate serial Other times that are proportional to the collection set length
6871109: G1: remove the concept of the scan only prefix
Summary: Removed scan only regions and associated code. The young portion of the collection set is now constructed incrementally - when a young region is retired as the current allocation region it is added to the collection set.
Reviewed-by: apetrusenko, iveresov, 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 // 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.

    36   int _worker_id;

    37   int _worker_id_offset;

    39   // The refinement threads collection is linked list. A predecessor can activate a successor

    40   // when the number of the rset update buffer crosses a certain threshold. A successor

    41   // would self-deactivate when the number of the buffers falls below the threshold.

    42   bool _active;

    43   ConcurrentG1RefineThread* _next;

    44   Monitor* _monitor;

    45   ConcurrentG1Refine* _cg1r;

    47   int _thread_threshold_step;

    48   // This thread activation threshold

    49   int _threshold;

    50   // This thread deactivation threshold

    51   int _deactivation_threshold;

    53   void sample_young_list_rs_lengths();

    54   void run_young_rs_sampling();

    55   void wait_for_completed_buffers();

    57   void set_active(bool x) { _active = x; }

    58   bool is_active();

    59   void activate();

    60   void deactivate();

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

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

    65 public:

    66   virtual void run();

    67   // Constructor

    68   ConcurrentG1RefineThread(ConcurrentG1Refine* cg1r, ConcurrentG1RefineThread* next,

    69                            int worker_id_offset, int worker_id);

    71   void initialize();

    73   // Printing

    74   void print() const;

    75   void print_on(outputStream* st) const;

    77   // Total virtual time so far.

    78   double vtime_accum() { return _vtime_accum; }

    80   ConcurrentG1Refine* cg1r() { return _cg1r;     }

    82   // Yield for GC

    83   void yield();

    84   // shutdown

    85   void stop();

    86 };

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

src/share/vm/gc_implementation/g1/concurrentG1RefineThread.hpp@1316cec51b4d

src/share/vm/gc_implementation/g1/concurrentG1RefineThread.hpp