ysr@777: /*
johnc@5078:  * Copyright (c) 2001, 2013, Oracle and/or its affiliates. All rights reserved.
ysr@777:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
ysr@777:  *
ysr@777:  * This code is free software; you can redistribute it and/or modify it
ysr@777:  * under the terms of the GNU General Public License version 2 only, as
ysr@777:  * published by the Free Software Foundation.
ysr@777:  *
ysr@777:  * This code is distributed in the hope that it will be useful, but WITHOUT
ysr@777:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
ysr@777:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
ysr@777:  * version 2 for more details (a copy is included in the LICENSE file that
ysr@777:  * accompanied this code).
ysr@777:  *
ysr@777:  * You should have received a copy of the GNU General Public License version
ysr@777:  * 2 along with this work; if not, write to the Free Software Foundation,
ysr@777:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
ysr@777:  *
trims@1907:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907:  * or visit www.oracle.com if you need additional information or have any
trims@1907:  * questions.
ysr@777:  *
ysr@777:  */
ysr@777: 
stefank@2314: #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_CONCURRENTG1REFINE_HPP
stefank@2314: #define SHARE_VM_GC_IMPLEMENTATION_G1_CONCURRENTG1REFINE_HPP
stefank@2314: 
johnc@5078: #include "gc_implementation/g1/g1HotCardCache.hpp"
stefank@2314: #include "memory/allocation.hpp"
stefank@2314: #include "runtime/thread.hpp"
stefank@2314: #include "utilities/globalDefinitions.hpp"
stefank@2314: 
ysr@777: // Forward decl
ysr@777: class ConcurrentG1RefineThread;
johnc@5078: class G1CollectedHeap;
johnc@5078: class G1HotCardCache;
ysr@777: class G1RemSet;
tschatzl@5204: class DirtyCardQueue;
ysr@777: 
zgu@3900: class ConcurrentG1Refine: public CHeapObj<mtGC> {
iveresov@1229:   ConcurrentG1RefineThread** _threads;
iveresov@1229:   int _n_threads;
iveresov@1546:   int _n_worker_threads;
iveresov@1546:  /*
iveresov@1546:   * The value of the update buffer queue length falls into one of 3 zones:
iveresov@1546:   * green, yellow, red. If the value is in [0, green) nothing is
iveresov@1546:   * done, the buffers are left unprocessed to enable the caching effect of the
iveresov@1546:   * dirtied cards. In the yellow zone [green, yellow) the concurrent refinement
iveresov@1546:   * threads are gradually activated. In [yellow, red) all threads are
iveresov@1546:   * running. If the length becomes red (max queue length) the mutators start
iveresov@1546:   * processing the buffers.
iveresov@1546:   *
tonyp@1717:   * There are some interesting cases (when G1UseAdaptiveConcRefinement
tonyp@1717:   * is turned off):
iveresov@1546:   * 1) green = yellow = red = 0. In this case the mutator will process all
iveresov@1546:   *    buffers. Except for those that are created by the deferred updates
iveresov@1546:   *    machinery during a collection.
iveresov@1546:   * 2) green = 0. Means no caching. Can be a good way to minimize the
iveresov@1546:   *    amount of time spent updating rsets during a collection.
iveresov@1546:   */
iveresov@1546:   int _green_zone;
iveresov@1546:   int _yellow_zone;
iveresov@1546:   int _red_zone;
iveresov@1546: 
iveresov@1546:   int _thread_threshold_step;
iveresov@1546: 
johnc@5078:   // We delay the refinement of 'hot' cards using the hot card cache.
johnc@5078:   G1HotCardCache _hot_card_cache;
johnc@5078: 
iveresov@1546:   // Reset the threshold step value based of the current zone boundaries.
iveresov@1546:   void reset_threshold_step();
johnc@1325: 
ysr@777:  public:
johnc@5078:   ConcurrentG1Refine(G1CollectedHeap* g1h);
ysr@777:   ~ConcurrentG1Refine();
ysr@777: 
ysr@777:   void init(); // Accomplish some initialization that has to wait.
iveresov@1229:   void stop();
ysr@777: 
iveresov@1546:   void reinitialize_threads();
iveresov@1546: 
tschatzl@5204:   // Iterate over all concurrent refinement threads
iveresov@1229:   void threads_do(ThreadClosure *tc);
ysr@777: 
tschatzl@5204:   // Iterate over all worker refinement threads
tschatzl@5204:   void worker_threads_do(ThreadClosure * tc);
tschatzl@5204: 
tschatzl@5204:   // The RS sampling thread
tschatzl@5204:   ConcurrentG1RefineThread * sampling_thread() const;
tschatzl@5204: 
iveresov@1546:   static int thread_num();
tonyp@1454: 
tonyp@1454:   void print_worker_threads_on(outputStream* st) const;
iveresov@1546: 
iveresov@1546:   void set_green_zone(int x)  { _green_zone = x;  }
iveresov@1546:   void set_yellow_zone(int x) { _yellow_zone = x; }
iveresov@1546:   void set_red_zone(int x)    { _red_zone = x;    }
iveresov@1546: 
iveresov@1546:   int green_zone() const      { return _green_zone;  }
iveresov@1546:   int yellow_zone() const     { return _yellow_zone; }
iveresov@1546:   int red_zone() const        { return _red_zone;    }
iveresov@1546: 
iveresov@1546:   int total_thread_num() const  { return _n_threads;        }
iveresov@1546:   int worker_thread_num() const { return _n_worker_threads; }
iveresov@1546: 
iveresov@1546:   int thread_threshold_step() const { return _thread_threshold_step; }
johnc@5078: 
johnc@5078:   G1HotCardCache* hot_card_cache() { return &_hot_card_cache; }
ysr@777: };
stefank@2314: 
stefank@2314: #endif // SHARE_VM_GC_IMPLEMENTATION_G1_CONCURRENTG1REFINE_HPP