src/hotspot/share/gc/g1/g1FullGCReferenceProcessorExecutor.hpp
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Tue, 14 Nov 2017 11:33:23 +0100
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8186571: Implementation: JEP 307: Parallel Full GC for G1 Summary: Improve G1 worst-case latencies by making the full GC parallel. Reviewed-by: tschatzl, sangheki, ehelin
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/*
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 * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 *
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 */
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#ifndef SHARE_GC_G1_G1FULLGCREFERENCEPROCESSOREXECUTOR_HPP
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#define SHARE_GC_G1_G1FULLGCREFERENCEPROCESSOREXECUTOR_HPP
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#include "gc/g1/g1FullGCCompactionPoint.hpp"
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#include "gc/g1/g1FullGCScope.hpp"
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#include "gc/g1/g1FullGCTask.hpp"
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#include "gc/g1/g1RootProcessor.hpp"
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#include "gc/g1/g1StringDedup.hpp"
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#include "gc/g1/heapRegionManager.hpp"
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#include "gc/shared/referenceProcessor.hpp"
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#include "utilities/ticks.hpp"
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class G1FullGCTracer;
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class STWGCTimer;
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class G1FullGCReferenceProcessingExecutor: public AbstractRefProcTaskExecutor {
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  G1FullCollector*    _collector;
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  ReferenceProcessor* _reference_processor;
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  uint                _old_mt_degree;
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public:
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  G1FullGCReferenceProcessingExecutor(G1FullCollector* collector);
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  ~G1FullGCReferenceProcessingExecutor();
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  // Do reference processing.
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  void execute(STWGCTimer* timer, G1FullGCTracer* tracer);
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  // Executes the given task using concurrent marking worker threads.
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  virtual void execute(ProcessTask& task);
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  virtual void execute(EnqueueTask& task);
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private:
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  void run_task(AbstractGangTask* task);
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  class G1RefProcTaskProxy : public AbstractGangTask {
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    typedef AbstractRefProcTaskExecutor::ProcessTask ProcessTask;
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    ProcessTask&             _proc_task;
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    G1FullCollector*         _collector;
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    ParallelTaskTerminator   _terminator;
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  public:
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    G1RefProcTaskProxy(ProcessTask& proc_task,
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                       G1FullCollector* scope);
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    virtual void work(uint worker_id);
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  };
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  class G1RefEnqueueTaskProxy: public AbstractGangTask {
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    typedef AbstractRefProcTaskExecutor::EnqueueTask EnqueueTask;
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    EnqueueTask& _enq_task;
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  public:
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    G1RefEnqueueTaskProxy(EnqueueTask& enq_task);
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    virtual void work(uint worker_id);
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  };
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};
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#endif // SHARE_GC_G1_G1FULLGCREFERENCEPROCESSOREXECUTOR_HPP