Mercurial > jdk8-mips64-public > hotspot / annotate
src/share/vm/gc_implementation/g1/g1MarkSweep.hpp@15c5903cf9e1 (annotated)
src/share/vm/gc_implementation/g1/g1MarkSweep.hpp
Mon, 03 Aug 2009 12:59:30 -0700
- author
- johnc
- date
- Mon, 03 Aug 2009 12:59:30 -0700
- changeset 1324
- 15c5903cf9e1
- parent 777
- 37f87013dfd8
- child 1907
- c18cbe5936b8
- permissions
- -rw-r--r--
6865703: G1: Parallelize hot card cache cleanup
Summary: Have the GC worker threads clear the hot card cache in parallel by having each worker thread claim a chunk of the card cache and process the cards in that chunk. The size of the chunks that each thread will claim is determined at VM initialization from the size of the card cache and the number of worker threads.
Reviewed-by: jmasa, tonyp
| ysr@777 | 1 | /* |
| ysr@777 | 2 | * Copyright 2001-2007 Sun Microsystems, Inc. All Rights Reserved. |
| ysr@777 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| ysr@777 | 4 | * |
| ysr@777 | 5 | * This code is free software; you can redistribute it and/or modify it |
| ysr@777 | 6 | * under the terms of the GNU General Public License version 2 only, as |
| ysr@777 | 7 | * published by the Free Software Foundation. |
| ysr@777 | 8 | * |
| ysr@777 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| ysr@777 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| ysr@777 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| ysr@777 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| ysr@777 | 13 | * accompanied this code). |
| ysr@777 | 14 | * |
| ysr@777 | 15 | * You should have received a copy of the GNU General Public License version |
| ysr@777 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| ysr@777 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| ysr@777 | 18 | * |
| ysr@777 | 19 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| ysr@777 | 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| ysr@777 | 21 | * have any questions. |
| ysr@777 | 22 | * |
| ysr@777 | 23 | */ |
| ysr@777 | 24 | |
| ysr@777 | 25 | class ReferenceProcessor; |
| ysr@777 | 26 | |
| ysr@777 | 27 | // G1MarkSweep takes care of global mark-compact garbage collection for a |
| ysr@777 | 28 | // G1CollectedHeap using a four-phase pointer forwarding algorithm. All |
| ysr@777 | 29 | // generations are assumed to support marking; those that can also support |
| ysr@777 | 30 | // compaction. |
| ysr@777 | 31 | // |
| ysr@777 | 32 | // Class unloading will only occur when a full gc is invoked. |
| ysr@777 | 33 | |
| ysr@777 | 34 | |
| ysr@777 | 35 | class G1MarkSweep : AllStatic { |
| ysr@777 | 36 | friend class VM_G1MarkSweep; |
| ysr@777 | 37 | friend class Scavenge; |
| ysr@777 | 38 | |
| ysr@777 | 39 | public: |
| ysr@777 | 40 | |
| ysr@777 | 41 | static void invoke_at_safepoint(ReferenceProcessor* rp, |
| ysr@777 | 42 | bool clear_all_softrefs); |
| ysr@777 | 43 | |
| ysr@777 | 44 | private: |
| ysr@777 | 45 | |
| ysr@777 | 46 | // Mark live objects |
| ysr@777 | 47 | static void mark_sweep_phase1(bool& marked_for_deopt, |
| ysr@777 | 48 | bool clear_all_softrefs); |
| ysr@777 | 49 | // Calculate new addresses |
| ysr@777 | 50 | static void mark_sweep_phase2(); |
| ysr@777 | 51 | // Update pointers |
| ysr@777 | 52 | static void mark_sweep_phase3(); |
| ysr@777 | 53 | // Move objects to new positions |
| ysr@777 | 54 | static void mark_sweep_phase4(); |
| ysr@777 | 55 | |
| ysr@777 | 56 | static void allocate_stacks(); |
| ysr@777 | 57 | }; |
