| /* |
| * Copyright (c) 2017, 2018, Red Hat, Inc. All rights reserved. |
| * |
| * 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_SHENANDOAH_SHENANDOAHWORKGROUP_HPP |
| #define SHARE_VM_GC_SHENANDOAH_SHENANDOAHWORKGROUP_HPP |
| |
| #include "gc/shared/workgroup.hpp" |
| #include "gc/shenandoah/shenandoahTaskqueue.hpp" |
| #include "memory/allocation.hpp" |
| |
| class ShenandoahObjToScanQueueSet; |
| |
| class ShenandoahWorkerScope : public StackObj { |
| private: |
| uint _n_workers; |
| WorkGang* _workers; |
| public: |
| ShenandoahWorkerScope(WorkGang* workers, uint nworkers, const char* msg, bool do_check = true); |
| ~ShenandoahWorkerScope(); |
| }; |
| |
| class ShenandoahPushWorkerScope : StackObj { |
| protected: |
| uint _n_workers; |
| uint _old_workers; |
| WorkGang* _workers; |
| |
| public: |
| ShenandoahPushWorkerScope(WorkGang* workers, uint nworkers, bool do_check = true); |
| ~ShenandoahPushWorkerScope(); |
| }; |
| |
| class ShenandoahPushWorkerQueuesScope : public ShenandoahPushWorkerScope { |
| private: |
| ShenandoahObjToScanQueueSet* _queues; |
| |
| public: |
| ShenandoahPushWorkerQueuesScope(WorkGang* workers, ShenandoahObjToScanQueueSet* queues, uint nworkers, bool do_check = true); |
| ~ShenandoahPushWorkerQueuesScope(); |
| }; |
| |
| class ShenandoahWorkGang : public WorkGang { |
| private: |
| bool _initialize_gclab; |
| public: |
| ShenandoahWorkGang(const char* name, |
| uint workers, |
| bool are_GC_task_threads, |
| bool are_ConcurrentGC_threads) : |
| WorkGang(name, workers, are_GC_task_threads, are_ConcurrentGC_threads), _initialize_gclab(false) { |
| } |
| |
| // Create a GC worker and install it into the work gang. |
| // We need to initialize gclab for dynamic allocated workers |
| AbstractGangWorker* install_worker(uint which); |
| |
| // We allow _active_workers < _total_workers when UseDynamicNumberOfGCThreads is off. |
| // We use the same WorkGang for concurrent and parallel processing, and honor |
| // ConcGCThreads and ParallelGCThreads settings |
| virtual uint active_workers() const { |
| assert(_active_workers > 0, "no active worker"); |
| assert(_active_workers <= _total_workers, |
| "_active_workers: %u > _total_workers: %u", _active_workers, _total_workers); |
| return _active_workers; |
| } |
| |
| void set_initialize_gclab() { assert(!_initialize_gclab, "Can only enable once"); _initialize_gclab = true; } |
| }; |
| |
| #endif // SHARE_VM_GC_SHENANDOAH_SHENANDOAHWORKGROUP_HPP |