| /* |
| * Copyright (c) 2001, 2016, 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_G1_CONCURRENTG1REFINETHREAD_HPP |
| #define SHARE_VM_GC_G1_CONCURRENTG1REFINETHREAD_HPP |
| |
| #include "gc/shared/concurrentGCThread.hpp" |
| |
| // Forward Decl. |
| class CardTableEntryClosure; |
| class ConcurrentG1Refine; |
| |
| // One or more G1 Concurrent Refinement Threads may be active if concurrent |
| // refinement is in progress. |
| class ConcurrentG1RefineThread: public ConcurrentGCThread { |
| friend class VMStructs; |
| friend class G1CollectedHeap; |
| |
| double _vtime_start; // Initial virtual time. |
| double _vtime_accum; // Accumulated virtual time. |
| uint _worker_id; |
| uint _worker_id_offset; |
| |
| // The refinement threads collection is linked list. A predecessor can activate a successor |
| // when the number of the rset update buffer crosses a certain threshold. A successor |
| // would self-deactivate when the number of the buffers falls below the threshold. |
| bool _active; |
| ConcurrentG1RefineThread* _next; |
| Monitor* _monitor; |
| ConcurrentG1Refine* _cg1r; |
| |
| // The closure applied to completed log buffers. |
| CardTableEntryClosure* _refine_closure; |
| |
| size_t _thread_threshold_step; |
| // This thread activation threshold |
| size_t _threshold; |
| // This thread deactivation threshold |
| size_t _deactivation_threshold; |
| |
| void wait_for_completed_buffers(); |
| |
| void set_active(bool x) { _active = x; } |
| bool is_active(); |
| void activate(); |
| void deactivate(); |
| |
| bool is_primary() { return (_worker_id == 0); } |
| |
| void run_service(); |
| void stop_service(); |
| |
| public: |
| virtual void run(); |
| // Constructor |
| ConcurrentG1RefineThread(ConcurrentG1Refine* cg1r, ConcurrentG1RefineThread* next, |
| CardTableEntryClosure* refine_closure, |
| uint worker_id_offset, uint worker_id); |
| |
| void initialize(); |
| |
| // Total virtual time so far. |
| double vtime_accum() { return _vtime_accum; } |
| |
| ConcurrentG1Refine* cg1r() { return _cg1r; } |
| |
| // shutdown |
| void stop(); |
| }; |
| |
| #endif // SHARE_VM_GC_G1_CONCURRENTG1REFINETHREAD_HPP |