| /* |
| * Copyright (c) 2017, 2018, 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/g1/g1CollectedHeap.hpp" |
| #include "gc/g1/g1FullCollector.hpp" |
| #include "gc/g1/g1FullGCMarker.hpp" |
| #include "gc/g1/g1FullGCOopClosures.inline.hpp" |
| #include "gc/g1/g1FullGCReferenceProcessorExecutor.hpp" |
| #include "gc/shared/gcTraceTime.inline.hpp" |
| #include "gc/shared/referenceProcessor.hpp" |
| #include "gc/shared/referenceProcessorPhaseTimes.hpp" |
| #include "memory/iterator.inline.hpp" |
| |
| G1FullGCReferenceProcessingExecutor::G1FullGCReferenceProcessingExecutor(G1FullCollector* collector) : |
| _collector(collector), |
| _reference_processor(collector->reference_processor()), |
| _old_mt_degree(_reference_processor->num_queues()) { |
| if (_reference_processor->processing_is_mt()) { |
| _reference_processor->set_active_mt_degree(_collector->workers()); |
| } |
| } |
| |
| G1FullGCReferenceProcessingExecutor::~G1FullGCReferenceProcessingExecutor() { |
| if (_reference_processor->processing_is_mt()) { |
| _reference_processor->set_active_mt_degree(_old_mt_degree); |
| } |
| } |
| |
| G1FullGCReferenceProcessingExecutor::G1RefProcTaskProxy::G1RefProcTaskProxy(ProcessTask& proc_task, |
| G1FullCollector* collector) : |
| AbstractGangTask("G1 reference processing task"), |
| _proc_task(proc_task), |
| _collector(collector), |
| _terminator(_collector->workers(), _collector->oop_queue_set()) { } |
| |
| void G1FullGCReferenceProcessingExecutor::G1RefProcTaskProxy::work(uint worker_id) { |
| G1FullGCMarker* marker = _collector->marker(worker_id); |
| G1IsAliveClosure is_alive(_collector->mark_bitmap()); |
| G1FullKeepAliveClosure keep_alive(marker); |
| _proc_task.work(worker_id, |
| is_alive, |
| keep_alive, |
| *marker->stack_closure()); |
| } |
| |
| void G1FullGCReferenceProcessingExecutor::run_task(AbstractGangTask* task) { |
| G1CollectedHeap::heap()->workers()->run_task(task, _collector->workers()); |
| } |
| |
| void G1FullGCReferenceProcessingExecutor::run_task(AbstractGangTask* task, uint workers) { |
| G1CollectedHeap::heap()->workers()->run_task(task, workers); |
| } |
| |
| void G1FullGCReferenceProcessingExecutor::execute(ProcessTask& proc_task, uint ergo_workers) { |
| G1RefProcTaskProxy proc_task_proxy(proc_task, _collector); |
| run_task(&proc_task_proxy, ergo_workers); |
| } |
| |
| void G1FullGCReferenceProcessingExecutor::execute(STWGCTimer* timer, G1FullGCTracer* tracer) { |
| GCTraceTime(Debug, gc, phases) debug("Phase 1: Reference Processing", timer); |
| // Process reference objects found during marking. |
| G1FullGCMarker* marker = _collector->marker(0); |
| G1IsAliveClosure is_alive(_collector->mark_bitmap()); |
| G1FullKeepAliveClosure keep_alive(marker); |
| ReferenceProcessorPhaseTimes pt(timer, _reference_processor->max_num_queues()); |
| AbstractRefProcTaskExecutor* executor = _reference_processor->processing_is_mt() ? this : NULL; |
| |
| // Process discovered references, use this executor if multi-threaded |
| // processing is enabled. |
| const ReferenceProcessorStats& stats = |
| _reference_processor->process_discovered_references(&is_alive, |
| &keep_alive, |
| marker->stack_closure(), |
| executor, |
| &pt); |
| |
| tracer->report_gc_reference_stats(stats); |
| pt.print_all_references(); |
| |
| assert(marker->oop_stack()->is_empty(), "Should be no oops on the stack"); |
| } |