Fri, 18 Feb 2011 10:07:34 -0800
7020042: G1: Partially remove fix for 6994628
Summary: Disable reference discovery and processing during concurrent marking by disabling fix for 6994628.
Reviewed-by: tonyp, ysr
1 /*
2 * Copyright (c) 2001, 2011, Oracle and/or its affiliates. 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.
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
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23 */
25 #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_VM_OPERATIONS_G1_HPP
26 #define SHARE_VM_GC_IMPLEMENTATION_G1_VM_OPERATIONS_G1_HPP
28 #include "gc_implementation/shared/vmGCOperations.hpp"
30 // VM_operations for the G1 collector.
31 // VM_GC_Operation:
32 // - VM_CGC_Operation
33 // - VM_G1CollectFull
34 // - VM_G1OperationWithAllocRequest
35 // - VM_G1CollectForAllocation
36 // - VM_G1IncCollectionPause
38 class VM_G1OperationWithAllocRequest: public VM_GC_Operation {
39 protected:
40 size_t _word_size;
41 HeapWord* _result;
42 bool _pause_succeeded;
44 public:
45 VM_G1OperationWithAllocRequest(unsigned int gc_count_before,
46 size_t word_size)
47 : VM_GC_Operation(gc_count_before, GCCause::_allocation_failure),
48 _word_size(word_size), _result(NULL), _pause_succeeded(false) { }
49 HeapWord* result() { return _result; }
50 bool pause_succeeded() { return _pause_succeeded; }
51 };
53 class VM_G1CollectFull: public VM_GC_Operation {
54 public:
55 VM_G1CollectFull(unsigned int gc_count_before,
56 unsigned int full_gc_count_before,
57 GCCause::Cause cause)
58 : VM_GC_Operation(gc_count_before, cause, full_gc_count_before) { }
59 virtual VMOp_Type type() const { return VMOp_G1CollectFull; }
60 virtual void doit();
61 virtual const char* name() const {
62 return "full garbage-first collection";
63 }
64 };
66 class VM_G1CollectForAllocation: public VM_G1OperationWithAllocRequest {
67 public:
68 VM_G1CollectForAllocation(unsigned int gc_count_before,
69 size_t word_size);
70 virtual VMOp_Type type() const { return VMOp_G1CollectForAllocation; }
71 virtual void doit();
72 virtual const char* name() const {
73 return "garbage-first collection to satisfy allocation";
74 }
75 };
77 class VM_G1IncCollectionPause: public VM_G1OperationWithAllocRequest {
78 private:
79 bool _should_initiate_conc_mark;
80 double _target_pause_time_ms;
81 unsigned int _full_collections_completed_before;
82 public:
83 VM_G1IncCollectionPause(unsigned int gc_count_before,
84 size_t word_size,
85 bool should_initiate_conc_mark,
86 double target_pause_time_ms,
87 GCCause::Cause gc_cause);
88 virtual VMOp_Type type() const { return VMOp_G1IncCollectionPause; }
89 virtual void doit();
90 virtual void doit_epilogue();
91 virtual const char* name() const {
92 return "garbage-first incremental collection pause";
93 }
94 };
96 // Concurrent GC stop-the-world operations such as initial and final mark;
97 // consider sharing these with CMS's counterparts.
98 class VM_CGC_Operation: public VM_Operation {
99 VoidClosure* _cl;
100 const char* _printGCMessage;
101 public:
102 VM_CGC_Operation(VoidClosure* cl, const char *printGCMsg)
103 : _cl(cl), _printGCMessage(printGCMsg) { }
104 virtual VMOp_Type type() const { return VMOp_CGC_Operation; }
105 virtual void doit();
106 virtual bool doit_prologue();
107 virtual void doit_epilogue();
108 virtual const char* name() const {
109 return "concurrent gc";
110 }
111 };
113 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_VM_OPERATIONS_G1_HPP