Mercurial > jdk8-mips64-public > hotspot / annotate
src/share/vm/memory/genMarkSweep.hpp@7b0e9cba0307 (annotated)
src/share/vm/memory/genMarkSweep.hpp
Wed, 13 Jan 2010 15:26:39 -0800
- author
- ysr
- date
- Wed, 13 Jan 2010 15:26:39 -0800
- changeset 1601
- 7b0e9cba0307
- parent 777
- 37f87013dfd8
- child 1907
- c18cbe5936b8
- permissions
- -rw-r--r--
6896647: card marks can be deferred too long
Summary: Deferred card marks are now flushed during the gc prologue. Parallel[Scavege,OldGC] and SerialGC no longer defer card marks generated by COMPILER2 as a result of ReduceInitialCardMarks. For these cases, introduced a diagnostic option to defer the card marks, only for the purposes of testing and diagnostics. CMS and G1 continue to defer card marks. Potential performance concern related to single-threaded flushing of deferred card marks in the gc prologue will be addressed in the future.
Reviewed-by: never, johnc
| duke@435 | 1 | /* |
| duke@435 | 2 | * Copyright 2001-2004 Sun Microsystems, Inc. All Rights Reserved. |
| duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| duke@435 | 4 | * |
| duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
| duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
| duke@435 | 7 | * published by the Free Software Foundation. |
| duke@435 | 8 | * |
| duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| duke@435 | 13 | * accompanied this code). |
| duke@435 | 14 | * |
| duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
| duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| duke@435 | 18 | * |
| duke@435 | 19 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| duke@435 | 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| duke@435 | 21 | * have any questions. |
| duke@435 | 22 | * |
| duke@435 | 23 | */ |
| duke@435 | 24 | |
| duke@435 | 25 | class GenMarkSweep : public MarkSweep { |
| duke@435 | 26 | friend class VM_MarkSweep; |
| ysr@777 | 27 | friend class G1MarkSweep; |
| duke@435 | 28 | public: |
| duke@435 | 29 | static void invoke_at_safepoint(int level, ReferenceProcessor* rp, |
| duke@435 | 30 | bool clear_all_softrefs); |
| duke@435 | 31 | |
| duke@435 | 32 | private: |
| duke@435 | 33 | |
| duke@435 | 34 | // Mark live objects |
| duke@435 | 35 | static void mark_sweep_phase1(int level, bool clear_all_softrefs); |
| duke@435 | 36 | // Calculate new addresses |
| duke@435 | 37 | static void mark_sweep_phase2(); |
| duke@435 | 38 | // Update pointers |
| duke@435 | 39 | static void mark_sweep_phase3(int level); |
| duke@435 | 40 | // Move objects to new positions |
| duke@435 | 41 | static void mark_sweep_phase4(); |
| duke@435 | 42 | |
| duke@435 | 43 | // Temporary data structures for traversal and storing/restoring marks |
| duke@435 | 44 | static void allocate_stacks(); |
| duke@435 | 45 | static void deallocate_stacks(); |
| duke@435 | 46 | }; |
