jdk8-mips64-public/hotspot: src/share/vm/gc_implementation/g1/concurrentG1Refine.hpp@b0c374311c4e (annotated)

src/share/vm/gc_implementation/g1/concurrentG1Refine.hpp@b0c374311c4e (annotated)

src/share/vm/gc_implementation/g1/concurrentG1Refine.hpp

Mon, 21 Jul 2014 09:41:04 +0200

author: tschatzl
date: Mon, 21 Jul 2014 09:41:04 +0200
changeset 6937: b0c374311c4e
parent 6930: 570cb6369f17
child 7051: 1f1d373cd044
permissions: -rw-r--r--

8035400: Move G1ParScanThreadState into its own files
Summary: Extract the G1ParScanThreadState class from G1CollectedHeap.?pp into its own files.
Reviewed-by: brutisso, mgerdin

 /*
  * Copyright (c) 2001, 2013, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  *
  */
 #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_CONCURRENTG1REFINE_HPP
 #define SHARE_VM_GC_IMPLEMENTATION_G1_CONCURRENTG1REFINE_HPP
 #include "gc_implementation/g1/g1HotCardCache.hpp"
 #include "memory/allocation.hpp"
 #include "runtime/thread.hpp"
 #include "utilities/globalDefinitions.hpp"
 // Forward decl
 class ConcurrentG1RefineThread;
 class G1CollectedHeap;
 class G1HotCardCache;
 class G1RemSet;
 class DirtyCardQueue;
 class ConcurrentG1Refine: public CHeapObj<mtGC> {
   ConcurrentG1RefineThread** _threads;
   uint _n_threads;
   uint _n_worker_threads;
  /*
   * The value of the update buffer queue length falls into one of 3 zones:
   * green, yellow, red. If the value is in [0, green) nothing is
   * done, the buffers are left unprocessed to enable the caching effect of the
   * dirtied cards. In the yellow zone [green, yellow) the concurrent refinement
   * threads are gradually activated. In [yellow, red) all threads are
   * running. If the length becomes red (max queue length) the mutators start
   * processing the buffers.
   *
   * There are some interesting cases (when G1UseAdaptiveConcRefinement
   * is turned off):
   * 1) green = yellow = red = 0. In this case the mutator will process all
   *    buffers. Except for those that are created by the deferred updates
   *    machinery during a collection.
   * 2) green = 0. Means no caching. Can be a good way to minimize the
   *    amount of time spent updating rsets during a collection.
   */
   int _green_zone;
   int _yellow_zone;
   int _red_zone;
   int _thread_threshold_step;
   // We delay the refinement of 'hot' cards using the hot card cache.
   G1HotCardCache _hot_card_cache;
   // Reset the threshold step value based of the current zone boundaries.
   void reset_threshold_step();
  public:
   ConcurrentG1Refine(G1CollectedHeap* g1h, CardTableEntryClosure* refine_closure);
   ~ConcurrentG1Refine();
   void init(); // Accomplish some initialization that has to wait.
   void stop();
   void reinitialize_threads();
   // Iterate over all concurrent refinement threads
   void threads_do(ThreadClosure *tc);
   // Iterate over all worker refinement threads
   void worker_threads_do(ThreadClosure * tc);
   // The RS sampling thread
   ConcurrentG1RefineThread * sampling_thread() const;
   static uint thread_num();
   void print_worker_threads_on(outputStream* st) const;
   void set_green_zone(int x)  { _green_zone = x;  }
   void set_yellow_zone(int x) { _yellow_zone = x; }
   void set_red_zone(int x)    { _red_zone = x;    }
   int green_zone() const      { return _green_zone;  }
   int yellow_zone() const     { return _yellow_zone; }
   int red_zone() const        { return _red_zone;    }
   uint total_thread_num() const  { return _n_threads;        }
   uint worker_thread_num() const { return _n_worker_threads; }
   int thread_threshold_step() const { return _thread_threshold_step; }
   G1HotCardCache* hot_card_cache() { return &_hot_card_cache; }
 };
 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_CONCURRENTG1REFINE_HPP

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src/share/vm/gc_implementation/g1/concurrentG1Refine.hpp@b0c374311c4e (annotated)

src/share/vm/gc_implementation/g1/concurrentG1Refine.hpp