author | pliden |
Mon, 18 Mar 2019 11:50:40 +0100 | |
changeset 54167 | d0d26fc836dd |
parent 53072 | 82d3f0820d37 |
child 54623 | 1126f0607c70 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2018, 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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#include "precompiled.hpp" |
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#include "gc/shared/workgroup.hpp" |
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#include "gc/z/zRuntimeWorkers.hpp" |
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#include "gc/z/zThread.hpp" |
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#include "runtime/mutexLocker.hpp" |
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class ZRuntimeWorkersInitializeTask : public AbstractGangTask { |
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private: |
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const uint _nworkers; |
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uint _started; |
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Monitor _monitor; |
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public: |
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ZRuntimeWorkersInitializeTask(uint nworkers) : |
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AbstractGangTask("ZRuntimeWorkersInitializeTask"), |
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_nworkers(nworkers), |
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_started(0), |
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_monitor(Monitor::leaf, |
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"ZRuntimeWorkersInitialize", |
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false /* allow_vm_block */, |
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Monitor::_safepoint_check_never) {} |
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virtual void work(uint worker_id) { |
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// Register as runtime worker |
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ZThread::set_runtime_worker(); |
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// Wait for all threads to start |
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MonitorLockerEx ml(&_monitor, Monitor::_no_safepoint_check_flag); |
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if (++_started == _nworkers) { |
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// All threads started |
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ml.notify_all(); |
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} else { |
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while (_started != _nworkers) { |
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ml.wait(Monitor::_no_safepoint_check_flag); |
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} |
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} |
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} |
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}; |
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ZRuntimeWorkers::ZRuntimeWorkers() : |
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_workers("RuntimeWorker", |
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nworkers(), |
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false /* are_GC_task_threads */, |
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false /* are_ConcurrentGC_threads */) { |
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log_info(gc, init)("Runtime Workers: %u parallel", nworkers()); |
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// Initialize worker threads |
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_workers.initialize_workers(); |
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_workers.update_active_workers(nworkers()); |
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if (_workers.active_workers() != nworkers()) { |
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vm_exit_during_initialization("Failed to create ZRuntimeWorkers"); |
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} |
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// Execute task to register threads as runtime workers. This also |
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// helps reduce latency in early safepoints, which otherwise would |
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// have to take on any warmup costs. |
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ZRuntimeWorkersInitializeTask task(nworkers()); |
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_workers.run_task(&task); |
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} |
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uint ZRuntimeWorkers::nworkers() const { |
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return ParallelGCThreads; |
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} |
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WorkGang* ZRuntimeWorkers::workers() { |
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return &_workers; |
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} |
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void ZRuntimeWorkers::threads_do(ThreadClosure* tc) const { |
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_workers.threads_do(tc); |
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} |
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void ZRuntimeWorkers::print_threads_on(outputStream* st) const { |
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_workers.print_worker_threads_on(st); |
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} |