Mercurial > jdk8-mips64-public > hotspot / annotate
src/share/vm/gc_implementation/g1/g1StringDedupThread.hpp@a248d0be1309 (annotated)
src/share/vm/gc_implementation/g1/g1StringDedupThread.hpp
Mon, 19 Aug 2019 10:11:31 +0200
- author
- neugens
- date
- Mon, 19 Aug 2019 10:11:31 +0200
- changeset 9861
- a248d0be1309
- parent 6690
- 1772223a25a2
- child 6876
- 710a3c8b516e
- permissions
- -rw-r--r--
8229401: Fix JFR code cache test failures
8223689: Add JFR Thread Sampling Support
8223690: Add JFR BiasedLock Event Support
8223691: Add JFR G1 Region Type Change Event Support
8223692: Add JFR G1 Heap Summary Event Support
Summary: Backport JFR from JDK11, additional fixes
Reviewed-by: neugens, apetushkov
Contributed-by: denghui.ddh@alibaba-inc.com
| pliden@6413 | 1 | /* |
| pliden@6413 | 2 | * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. |
| pliden@6413 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| pliden@6413 | 4 | * |
| pliden@6413 | 5 | * This code is free software; you can redistribute it and/or modify it |
| pliden@6413 | 6 | * under the terms of the GNU General Public License version 2 only, as |
| pliden@6413 | 7 | * published by the Free Software Foundation. |
| pliden@6413 | 8 | * |
| pliden@6413 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| pliden@6413 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| pliden@6413 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| pliden@6413 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| pliden@6413 | 13 | * accompanied this code). |
| pliden@6413 | 14 | * |
| pliden@6413 | 15 | * You should have received a copy of the GNU General Public License version |
| pliden@6413 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| pliden@6413 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| pliden@6413 | 18 | * |
| pliden@6413 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| pliden@6413 | 20 | * or visit www.oracle.com if you need additional information or have any |
| pliden@6413 | 21 | * questions. |
| pliden@6413 | 22 | * |
| pliden@6413 | 23 | */ |
| pliden@6413 | 24 | |
| pliden@6413 | 25 | #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_G1STRINGDEDUPTHREAD_HPP |
| pliden@6413 | 26 | #define SHARE_VM_GC_IMPLEMENTATION_G1_G1STRINGDEDUPTHREAD_HPP |
| pliden@6413 | 27 | |
| pliden@6413 | 28 | #include "gc_implementation/g1/g1StringDedupStat.hpp" |
| pliden@6413 | 29 | #include "gc_implementation/shared/concurrentGCThread.hpp" |
| pliden@6413 | 30 | |
| pliden@6413 | 31 | // |
| pliden@6413 | 32 | // The deduplication thread is where the actual deduplication occurs. It waits for |
| pliden@6413 | 33 | // deduplication candidates to appear on the deduplication queue, removes them from |
| pliden@6413 | 34 | // the queue and tries to deduplicate them. It uses the deduplication hashtable to |
| pliden@6413 | 35 | // find identical, already existing, character arrays on the heap. The thread runs |
| pliden@6413 | 36 | // concurrently with the Java application but participates in safepoints to allow |
| pliden@6413 | 37 | // the GC to adjust and unlink oops from the deduplication queue and table. |
| pliden@6413 | 38 | // |
| pliden@6413 | 39 | class G1StringDedupThread: public ConcurrentGCThread { |
| pliden@6413 | 40 | private: |
| pliden@6413 | 41 | static G1StringDedupThread* _thread; |
| pliden@6413 | 42 | |
| pliden@6413 | 43 | G1StringDedupThread(); |
| pliden@6413 | 44 | ~G1StringDedupThread(); |
| pliden@6413 | 45 | |
| pliden@6413 | 46 | void print(outputStream* st, const G1StringDedupStat& last_stat, const G1StringDedupStat& total_stat); |
| pliden@6413 | 47 | |
| pliden@6413 | 48 | public: |
| pliden@6413 | 49 | static void create(); |
| pliden@6690 | 50 | static void stop(); |
| pliden@6690 | 51 | |
| pliden@6413 | 52 | static G1StringDedupThread* thread(); |
| pliden@6413 | 53 | |
| pliden@6413 | 54 | virtual void run(); |
| pliden@6413 | 55 | virtual void print_on(outputStream* st) const; |
| pliden@6413 | 56 | }; |
| pliden@6413 | 57 | |
| pliden@6413 | 58 | #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1STRINGDEDUPTHREAD_HPP |
