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src/share/vm/gc_implementation/g1/concurrentMarkThread.hpp@04ff2f6cd0eb (annotated)
src/share/vm/gc_implementation/g1/concurrentMarkThread.hpp
Tue, 17 Oct 2017 12:58:25 +0800
- author
- aoqi
- date
- Tue, 17 Oct 2017 12:58:25 +0800
- changeset 7994
- 04ff2f6cd0eb
- parent 7535
- 7ae4e26cb1e0
- permissions
- -rw-r--r--
merge
| aoqi@0 | 1 | /* |
| aoqi@0 | 2 | * Copyright (c) 2001, 2012, Oracle and/or its affiliates. All rights reserved. |
| aoqi@0 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| aoqi@0 | 4 | * |
| aoqi@0 | 5 | * This code is free software; you can redistribute it and/or modify it |
| aoqi@0 | 6 | * under the terms of the GNU General Public License version 2 only, as |
| aoqi@0 | 7 | * published by the Free Software Foundation. |
| aoqi@0 | 8 | * |
| aoqi@0 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| aoqi@0 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| aoqi@0 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| aoqi@0 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| aoqi@0 | 13 | * accompanied this code). |
| aoqi@0 | 14 | * |
| aoqi@0 | 15 | * You should have received a copy of the GNU General Public License version |
| aoqi@0 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| aoqi@0 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| aoqi@0 | 18 | * |
| aoqi@0 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| aoqi@0 | 20 | * or visit www.oracle.com if you need additional information or have any |
| aoqi@0 | 21 | * questions. |
| aoqi@0 | 22 | * |
| aoqi@0 | 23 | */ |
| aoqi@0 | 24 | |
| aoqi@0 | 25 | #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_CONCURRENTMARKTHREAD_HPP |
| aoqi@0 | 26 | #define SHARE_VM_GC_IMPLEMENTATION_G1_CONCURRENTMARKTHREAD_HPP |
| aoqi@0 | 27 | |
| aoqi@0 | 28 | #include "gc_implementation/shared/concurrentGCThread.hpp" |
| aoqi@0 | 29 | |
| aoqi@0 | 30 | // The Concurrent Mark GC Thread (could be several in the future). |
| aoqi@0 | 31 | // This is copied from the Concurrent Mark Sweep GC Thread |
| aoqi@0 | 32 | // Still under construction. |
| aoqi@0 | 33 | |
| aoqi@0 | 34 | class ConcurrentMark; |
| aoqi@0 | 35 | |
| aoqi@0 | 36 | class ConcurrentMarkThread: public ConcurrentGCThread { |
| aoqi@0 | 37 | friend class VMStructs; |
| aoqi@0 | 38 | |
| aoqi@0 | 39 | double _vtime_start; // Initial virtual time. |
| aoqi@0 | 40 | double _vtime_accum; // Accumulated virtual time. |
| aoqi@0 | 41 | |
| aoqi@0 | 42 | double _vtime_mark_accum; |
| aoqi@0 | 43 | |
| aoqi@0 | 44 | public: |
| aoqi@0 | 45 | virtual void run(); |
| aoqi@0 | 46 | |
| aoqi@0 | 47 | private: |
| aoqi@0 | 48 | ConcurrentMark* _cm; |
| aoqi@0 | 49 | volatile bool _started; |
| aoqi@0 | 50 | volatile bool _in_progress; |
| aoqi@0 | 51 | |
| aoqi@0 | 52 | void sleepBeforeNextCycle(); |
| aoqi@0 | 53 | |
| aoqi@0 | 54 | static SurrogateLockerThread* _slt; |
| aoqi@0 | 55 | |
| aoqi@0 | 56 | public: |
| aoqi@0 | 57 | // Constructor |
| aoqi@0 | 58 | ConcurrentMarkThread(ConcurrentMark* cm); |
| aoqi@0 | 59 | |
| aoqi@0 | 60 | static void makeSurrogateLockerThread(TRAPS); |
| aoqi@0 | 61 | static SurrogateLockerThread* slt() { return _slt; } |
| aoqi@0 | 62 | |
| aoqi@0 | 63 | // Printing |
| aoqi@0 | 64 | void print_on(outputStream* st) const; |
| aoqi@0 | 65 | void print() const; |
| aoqi@0 | 66 | |
| aoqi@0 | 67 | // Total virtual time so far. |
| aoqi@0 | 68 | double vtime_accum(); |
| aoqi@0 | 69 | // Marking virtual time so far |
| aoqi@0 | 70 | double vtime_mark_accum(); |
| aoqi@0 | 71 | |
| aoqi@0 | 72 | ConcurrentMark* cm() { return _cm; } |
| aoqi@0 | 73 | |
| aoqi@0 | 74 | void set_started() { assert(!_in_progress, "cycle in progress"); _started = true; } |
| aoqi@0 | 75 | void clear_started() { assert(_in_progress, "must be starting a cycle"); _started = false; } |
| aoqi@0 | 76 | bool started() { return _started; } |
| aoqi@0 | 77 | |
| aoqi@0 | 78 | void set_in_progress() { assert(_started, "must be starting a cycle"); _in_progress = true; } |
| aoqi@0 | 79 | void clear_in_progress() { assert(!_started, "must not be starting a new cycle"); _in_progress = false; } |
| aoqi@0 | 80 | bool in_progress() { return _in_progress; } |
| aoqi@0 | 81 | |
| aoqi@0 | 82 | // This flag returns true from the moment a marking cycle is |
| aoqi@0 | 83 | // initiated (during the initial-mark pause when started() is set) |
| aoqi@0 | 84 | // to the moment when the cycle completes (just after the next |
| aoqi@0 | 85 | // marking bitmap has been cleared and in_progress() is |
| aoqi@0 | 86 | // cleared). While this flag is true we will not start another cycle |
| aoqi@0 | 87 | // so that cycles do not overlap. We cannot use just in_progress() |
| aoqi@0 | 88 | // as the CM thread might take some time to wake up before noticing |
| aoqi@0 | 89 | // that started() is set and set in_progress(). |
| aoqi@0 | 90 | bool during_cycle() { return started() || in_progress(); } |
| aoqi@0 | 91 | |
| aoqi@0 | 92 | // shutdown |
| aoqi@0 | 93 | void stop(); |
| aoqi@0 | 94 | }; |
| aoqi@0 | 95 | |
| aoqi@0 | 96 | #endif // SHARE_VM_GC_IMPLEMENTATION_G1_CONCURRENTMARKTHREAD_HPP |
