18cddad5a2
Implement parallel processing of strong OopStorage entries for G1. Co-authored-by: Erik Osterlund <erik.osterlund@oracle.com> Co-authored-by: Stefan Karlsson <stefan.karlsson@oracle.com> Reviewed-by: kbarrett, stefank
103 lines
3.7 KiB
C++
103 lines
3.7 KiB
C++
/*
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* Copyright (c) 2015, 2020, 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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*/
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#ifndef SHARE_GC_G1_G1ROOTPROCESSOR_HPP
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#define SHARE_GC_G1_G1ROOTPROCESSOR_HPP
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#include "gc/shared/oopStorageSetParState.hpp"
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#include "gc/shared/strongRootsScope.hpp"
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#include "memory/allocation.hpp"
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#include "runtime/mutex.hpp"
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class CLDClosure;
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class CodeBlobClosure;
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class G1CollectedHeap;
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class G1EvacuationRootClosures;
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class G1GCPhaseTimes;
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class G1ParScanThreadState;
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class G1RootClosures;
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class Monitor;
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class OopClosure;
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class SubTasksDone;
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// Scoped object to assist in applying oop, CLD and code blob closures to
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// root locations. Handles claiming of different root scanning tasks
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// and takes care of global state for root scanning via a StrongRootsScope.
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// In the parallel case there is a shared G1RootProcessor object where all
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// worker thread call the process_roots methods.
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class G1RootProcessor : public StackObj {
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G1CollectedHeap* _g1h;
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SubTasksDone _process_strong_tasks;
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StrongRootsScope _srs;
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OopStorageSetStrongParState<false, false> _oop_storage_set_strong_par_state;
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enum G1H_process_roots_tasks {
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G1RP_PS_Universe_oops_do,
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G1RP_PS_ObjectSynchronizer_oops_do,
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G1RP_PS_Management_oops_do,
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G1RP_PS_ClassLoaderDataGraph_oops_do,
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G1RP_PS_jvmti_oops_do,
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G1RP_PS_CodeCache_oops_do,
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AOT_ONLY(G1RP_PS_aot_oops_do COMMA)
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G1RP_PS_refProcessor_oops_do,
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// Leave this one last.
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G1RP_PS_NumElements
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};
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void process_java_roots(G1RootClosures* closures,
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G1GCPhaseTimes* phase_times,
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uint worker_id);
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void process_vm_roots(G1RootClosures* closures,
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G1GCPhaseTimes* phase_times,
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uint worker_id);
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void process_code_cache_roots(CodeBlobClosure* code_closure,
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G1GCPhaseTimes* phase_times,
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uint worker_id);
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public:
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G1RootProcessor(G1CollectedHeap* g1h, uint n_workers);
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// Apply correct closures from pss to the strongly and weakly reachable roots in the system
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// in a single pass.
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// Record and report timing measurements for sub phases using worker_id.
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void evacuate_roots(G1ParScanThreadState* pss, uint worker_id);
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// Apply oops, clds and blobs to all strongly reachable roots in the system
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void process_strong_roots(OopClosure* oops,
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CLDClosure* clds,
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CodeBlobClosure* blobs);
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// Apply oops, clds and blobs to strongly and weakly reachable roots in the system
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void process_all_roots(OopClosure* oops,
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CLDClosure* clds,
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CodeBlobClosure* blobs);
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// Number of worker threads used by the root processor.
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uint n_workers() const;
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};
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#endif // SHARE_GC_G1_G1ROOTPROCESSOR_HPP
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