Mercurial > jdk8-mips64-public > hotspot / file revision
src/share/vm/gc_implementation/g1/vm_operations_g1.hpp@15c5903cf9e1
src/share/vm/gc_implementation/g1/vm_operations_g1.hpp
Mon, 03 Aug 2009 12:59:30 -0700
- author
- johnc
- date
- Mon, 03 Aug 2009 12:59:30 -0700
- changeset 1324
- 15c5903cf9e1
- parent 1279
- bd02caa94611
- child 1523
- 3fc996d4edd2
- 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
1 /*
2 * Copyright 2001-2009 Sun Microsystems, Inc. All Rights Reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
25 // VM_operations for the G1 collector.
26 // VM_GC_Operation:
27 // - VM_CGC_Operation
28 // - VM_G1CollectFull
29 // - VM_G1CollectForAllocation
30 // - VM_G1IncCollectionPause
31 // - VM_G1PopRegionCollectionPause
33 class VM_G1CollectFull: public VM_GC_Operation {
34 private:
35 public:
36 VM_G1CollectFull(int gc_count_before,
37 GCCause::Cause gc_cause)
38 : VM_GC_Operation(gc_count_before)
39 {
40 _gc_cause = gc_cause;
41 }
42 ~VM_G1CollectFull() {}
43 virtual VMOp_Type type() const { return VMOp_G1CollectFull; }
44 virtual void doit();
45 virtual const char* name() const {
46 return "full garbage-first collection";
47 }
48 };
50 class VM_G1CollectForAllocation: public VM_GC_Operation {
51 private:
52 HeapWord* _res;
53 size_t _size; // size of object to be allocated
54 public:
55 VM_G1CollectForAllocation(size_t size, int gc_count_before)
56 : VM_GC_Operation(gc_count_before) {
57 _size = size;
58 _res = NULL;
59 }
60 ~VM_G1CollectForAllocation() {}
61 virtual VMOp_Type type() const { return VMOp_G1CollectForAllocation; }
62 virtual void doit();
63 virtual const char* name() const {
64 return "garbage-first collection to satisfy allocation";
65 }
66 HeapWord* result() { return _res; }
67 };
69 class VM_G1IncCollectionPause: public VM_GC_Operation {
70 public:
71 VM_G1IncCollectionPause(int gc_count_before) :
72 VM_GC_Operation(gc_count_before) {}
73 virtual VMOp_Type type() const { return VMOp_G1IncCollectionPause; }
74 virtual void doit();
75 virtual const char* name() const {
76 return "garbage-first incremental collection pause";
77 }
78 };
80 // Concurrent GC stop-the-world operations such as initial and final mark;
81 // consider sharing these with CMS's counterparts.
82 class VM_CGC_Operation: public VM_Operation {
83 VoidClosure* _cl;
84 const char* _printGCMessage;
85 public:
86 VM_CGC_Operation(VoidClosure* cl, const char *printGCMsg) :
87 _cl(cl),
88 _printGCMessage(printGCMsg)
89 {}
91 ~VM_CGC_Operation() {}
93 virtual VMOp_Type type() const { return VMOp_CGC_Operation; }
94 virtual void doit();
95 virtual bool doit_prologue();
96 virtual void doit_epilogue();
97 virtual const char* name() const {
98 return "concurrent gc";
99 }
100 };
