Mercurial > hg > graal-jvmci-8
annotate src/share/vm/gc_implementation/g1/vm_operations_g1.hpp @ 3285:49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
Summary: It introduces non-product cmd line parameter G1DummyRegionsPerGC which indicates how many "dummy" regions to allocate at the end of each GC. This allows the G1 heap to grow artificially and makes concurrent marking cycles more frequent irrespective of what the application that is running is doing. The dummy regions will be found totally empty during cleanup so this parameter can also be used to stress the concurrent cleanup operation.
Reviewed-by: brutisso, johnc
| author | tonyp |
|---|---|
| date | Tue, 19 Apr 2011 15:46:59 -0400 |
| parents | c798c277ddd1 |
| children | db89aa49298f |
| rev | line source |
|---|---|
| 342 | 1 /* |
| 2225 | 2 * Copyright (c) 2001, 2011, 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) | |
| 2225 | 47 : VM_GC_Operation(gc_count_before, GCCause::_allocation_failure), |
| 1973 | 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) |
| 2225 | 58 : VM_GC_Operation(gc_count_before, cause, full_gc_count_before) { } |
| 342 | 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 }; | |
| 65 | |
| 1973 | 66 class VM_G1CollectForAllocation: public VM_G1OperationWithAllocRequest { |
| 67 public: | |
| 68 VM_G1CollectForAllocation(unsigned int gc_count_before, | |
| 69 size_t word_size); | |
| 342 | 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 }; | |
| 76 | |
| 1973 | 77 class VM_G1IncCollectionPause: public VM_G1OperationWithAllocRequest { |
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78 private: |
| 1973 | 79 bool _should_initiate_conc_mark; |
| 80 double _target_pause_time_ms; | |
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81 unsigned int _full_collections_completed_before; |
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82 public: |
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83 VM_G1IncCollectionPause(unsigned int gc_count_before, |
| 1973 | 84 size_t word_size, |
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85 bool should_initiate_conc_mark, |
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86 double target_pause_time_ms, |
| 1973 | 87 GCCause::Cause gc_cause); |
| 342 | 88 virtual VMOp_Type type() const { return VMOp_G1IncCollectionPause; } |
| 89 virtual void doit(); | |
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90 virtual void doit_epilogue(); |
| 342 | 91 virtual const char* name() const { |
| 92 return "garbage-first incremental collection pause"; | |
| 93 } | |
| 94 }; | |
| 95 | |
| 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; | |
| 1973 | 101 public: |
| 102 VM_CGC_Operation(VoidClosure* cl, const char *printGCMsg) | |
| 103 : _cl(cl), _printGCMessage(printGCMsg) { } | |
| 342 | 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 }; | |
| 1972 | 112 |
| 113 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_VM_OPERATIONS_G1_HPP |