| /* |
| * Copyright (c) 2001, 2013, 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. |
| * |
| */ |
| |
| #include "precompiled.hpp" |
| #include "gc_implementation/g1/concurrentG1Refine.hpp" |
| #include "gc_implementation/g1/concurrentG1RefineThread.hpp" |
| #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" |
| #include "gc_implementation/g1/g1HotCardCache.hpp" |
| |
| ConcurrentG1Refine::ConcurrentG1Refine(G1CollectedHeap* g1h) : |
| _threads(NULL), _n_threads(0), |
| _hot_card_cache(g1h) |
| { |
| // Ergomonically select initial concurrent refinement parameters |
| if (FLAG_IS_DEFAULT(G1ConcRefinementGreenZone)) { |
| FLAG_SET_DEFAULT(G1ConcRefinementGreenZone, MAX2<int>(ParallelGCThreads, 1)); |
| } |
| set_green_zone(G1ConcRefinementGreenZone); |
| |
| if (FLAG_IS_DEFAULT(G1ConcRefinementYellowZone)) { |
| FLAG_SET_DEFAULT(G1ConcRefinementYellowZone, green_zone() * 3); |
| } |
| set_yellow_zone(MAX2<int>(G1ConcRefinementYellowZone, green_zone())); |
| |
| if (FLAG_IS_DEFAULT(G1ConcRefinementRedZone)) { |
| FLAG_SET_DEFAULT(G1ConcRefinementRedZone, yellow_zone() * 2); |
| } |
| set_red_zone(MAX2<int>(G1ConcRefinementRedZone, yellow_zone())); |
| |
| _n_worker_threads = thread_num(); |
| // We need one extra thread to do the young gen rset size sampling. |
| _n_threads = _n_worker_threads + 1; |
| |
| reset_threshold_step(); |
| |
| _threads = NEW_C_HEAP_ARRAY(ConcurrentG1RefineThread*, _n_threads, mtGC); |
| |
| int worker_id_offset = (int)DirtyCardQueueSet::num_par_ids(); |
| |
| ConcurrentG1RefineThread *next = NULL; |
| for (int i = _n_threads - 1; i >= 0; i--) { |
| ConcurrentG1RefineThread* t = new ConcurrentG1RefineThread(this, next, worker_id_offset, i); |
| assert(t != NULL, "Conc refine should have been created"); |
| assert(t->cg1r() == this, "Conc refine thread should refer to this"); |
| _threads[i] = t; |
| next = t; |
| } |
| } |
| |
| void ConcurrentG1Refine::reset_threshold_step() { |
| if (FLAG_IS_DEFAULT(G1ConcRefinementThresholdStep)) { |
| _thread_threshold_step = (yellow_zone() - green_zone()) / (worker_thread_num() + 1); |
| } else { |
| _thread_threshold_step = G1ConcRefinementThresholdStep; |
| } |
| } |
| |
| void ConcurrentG1Refine::init() { |
| _hot_card_cache.initialize(); |
| } |
| |
| void ConcurrentG1Refine::stop() { |
| if (_threads != NULL) { |
| for (int i = 0; i < _n_threads; i++) { |
| _threads[i]->stop(); |
| } |
| } |
| } |
| |
| void ConcurrentG1Refine::reinitialize_threads() { |
| reset_threshold_step(); |
| if (_threads != NULL) { |
| for (int i = 0; i < _n_threads; i++) { |
| _threads[i]->initialize(); |
| } |
| } |
| } |
| |
| ConcurrentG1Refine::~ConcurrentG1Refine() { |
| if (_threads != NULL) { |
| for (int i = 0; i < _n_threads; i++) { |
| delete _threads[i]; |
| } |
| FREE_C_HEAP_ARRAY(ConcurrentG1RefineThread*, _threads, mtGC); |
| } |
| } |
| |
| void ConcurrentG1Refine::threads_do(ThreadClosure *tc) { |
| if (_threads != NULL) { |
| for (int i = 0; i < _n_threads; i++) { |
| tc->do_thread(_threads[i]); |
| } |
| } |
| } |
| |
| int ConcurrentG1Refine::thread_num() { |
| int n_threads = (G1ConcRefinementThreads > 0) ? G1ConcRefinementThreads |
| : ParallelGCThreads; |
| return MAX2<int>(n_threads, 1); |
| } |
| |
| void ConcurrentG1Refine::print_worker_threads_on(outputStream* st) const { |
| for (int i = 0; i < _n_threads; ++i) { |
| _threads[i]->print_on(st); |
| st->cr(); |
| } |
| } |