Mercurial > hg > graal-jvmci-8
annotate src/share/vm/gc_implementation/g1/vm_operations_g1.hpp @ 2188:c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
7007446: G1: expand the heap with a single step, not one region at a time
Summary: Changed G1CollectedHeap::expand() to expand the committed space by calling VirtualSpace::expand_by() once rather than for every region in the expansion amount. This allows the success or failure of the expansion to be determined before creating any heap regions. Introduced a develop flag G1ExitOnExpansionFailure (false by default) that, when true, will exit the VM if the expansion of the committed space fails. Finally G1CollectedHeap::expand() returns a status back to it's caller so that the caller knows whether to attempt the allocation.
Reviewed-by: brutisso, tonyp
author | johnc |
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date | Wed, 02 Feb 2011 10:41:20 -0800 |
parents | 631f79e71e90 |
children | c798c277ddd1 |
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342 | 1 /* |
1972 | 2 * Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved. |
342 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
342 | 22 * |
23 */ | |
24 | |
1972 | 25 #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_VM_OPERATIONS_G1_HPP |
26 #define SHARE_VM_GC_IMPLEMENTATION_G1_VM_OPERATIONS_G1_HPP | |
27 | |
28 #include "gc_implementation/shared/vmGCOperations.hpp" | |
29 | |
342 | 30 // VM_operations for the G1 collector. |
31 // VM_GC_Operation: | |
32 // - VM_CGC_Operation | |
33 // - VM_G1CollectFull | |
1973 | 34 // - VM_G1OperationWithAllocRequest |
35 // - VM_G1CollectForAllocation | |
36 // - VM_G1IncCollectionPause | |
37 | |
38 class VM_G1OperationWithAllocRequest: public VM_GC_Operation { | |
39 protected: | |
40 size_t _word_size; | |
41 HeapWord* _result; | |
42 bool _pause_succeeded; | |
43 | |
44 public: | |
45 VM_G1OperationWithAllocRequest(unsigned int gc_count_before, | |
46 size_t word_size) | |
47 : VM_GC_Operation(gc_count_before), | |
48 _word_size(word_size), _result(NULL), _pause_succeeded(false) { } | |
49 HeapWord* result() { return _result; } | |
50 bool pause_succeeded() { return _pause_succeeded; } | |
51 }; | |
342 | 52 |
53 class VM_G1CollectFull: public VM_GC_Operation { | |
1973 | 54 public: |
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55 VM_G1CollectFull(unsigned int gc_count_before, |
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56 unsigned int full_gc_count_before, |
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57 GCCause::Cause cause) |
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58 : VM_GC_Operation(gc_count_before, full_gc_count_before) { |
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59 _gc_cause = cause; |
342 | 60 } |
61 virtual VMOp_Type type() const { return VMOp_G1CollectFull; } | |
62 virtual void doit(); | |
63 virtual const char* name() const { | |
64 return "full garbage-first collection"; | |
65 } | |
66 }; | |
67 | |
1973 | 68 class VM_G1CollectForAllocation: public VM_G1OperationWithAllocRequest { |
69 public: | |
70 VM_G1CollectForAllocation(unsigned int gc_count_before, | |
71 size_t word_size); | |
342 | 72 virtual VMOp_Type type() const { return VMOp_G1CollectForAllocation; } |
73 virtual void doit(); | |
74 virtual const char* name() const { | |
75 return "garbage-first collection to satisfy allocation"; | |
76 } | |
77 }; | |
78 | |
1973 | 79 class VM_G1IncCollectionPause: public VM_G1OperationWithAllocRequest { |
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80 private: |
1973 | 81 bool _should_initiate_conc_mark; |
82 double _target_pause_time_ms; | |
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83 unsigned int _full_collections_completed_before; |
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84 public: |
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85 VM_G1IncCollectionPause(unsigned int gc_count_before, |
1973 | 86 size_t word_size, |
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87 bool should_initiate_conc_mark, |
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88 double target_pause_time_ms, |
1973 | 89 GCCause::Cause gc_cause); |
342 | 90 virtual VMOp_Type type() const { return VMOp_G1IncCollectionPause; } |
91 virtual void doit(); | |
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92 virtual void doit_epilogue(); |
342 | 93 virtual const char* name() const { |
94 return "garbage-first incremental collection pause"; | |
95 } | |
96 }; | |
97 | |
98 // Concurrent GC stop-the-world operations such as initial and final mark; | |
99 // consider sharing these with CMS's counterparts. | |
100 class VM_CGC_Operation: public VM_Operation { | |
101 VoidClosure* _cl; | |
102 const char* _printGCMessage; | |
1973 | 103 public: |
104 VM_CGC_Operation(VoidClosure* cl, const char *printGCMsg) | |
105 : _cl(cl), _printGCMessage(printGCMsg) { } | |
342 | 106 virtual VMOp_Type type() const { return VMOp_CGC_Operation; } |
107 virtual void doit(); | |
108 virtual bool doit_prologue(); | |
109 virtual void doit_epilogue(); | |
110 virtual const char* name() const { | |
111 return "concurrent gc"; | |
112 } | |
113 }; | |
1972 | 114 |
115 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_VM_OPERATIONS_G1_HPP |