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annotate src/share/vm/gc_implementation/g1/vm_operations_g1.hpp @ 11979:8d4ff57af591

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8022051: G1: Remove some unused G1 flags Reviewed-by: tschatzl, jmasa
author brutisso
date Thu, 01 Aug 2013 17:29:49 +0200
parents 37552638d24a
children 227a9e5e4b4a
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1 /*
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2 * Copyright (c) 2001, 2012, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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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.
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22 *
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23 */
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24
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25 #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_VM_OPERATIONS_G1_HPP
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26 #define SHARE_VM_GC_IMPLEMENTATION_G1_VM_OPERATIONS_G1_HPP
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27
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28 #include "gc_implementation/shared/vmGCOperations.hpp"
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29
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30 // VM_operations for the G1 collector.
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31 // VM_GC_Operation:
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32 // - VM_CGC_Operation
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33 // - VM_G1CollectFull
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34 // - VM_G1OperationWithAllocRequest
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35 // - VM_G1CollectForAllocation
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36 // - VM_G1IncCollectionPause
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37
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38 class VM_G1OperationWithAllocRequest: public VM_GC_Operation {
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39 protected:
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40 size_t _word_size;
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41 HeapWord* _result;
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42 bool _pause_succeeded;
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43
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44 public:
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45 VM_G1OperationWithAllocRequest(unsigned int gc_count_before,
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46 size_t word_size,
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47 GCCause::Cause gc_cause)
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48 : VM_GC_Operation(gc_count_before, gc_cause),
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49 _word_size(word_size), _result(NULL), _pause_succeeded(false) { }
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50 HeapWord* result() { return _result; }
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51 bool pause_succeeded() { return _pause_succeeded; }
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52 };
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53
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54 class VM_G1CollectFull: public VM_GC_Operation {
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55 public:
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56 VM_G1CollectFull(unsigned int gc_count_before,
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57 unsigned int full_gc_count_before,
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58 GCCause::Cause cause)
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59 : VM_GC_Operation(gc_count_before, cause, full_gc_count_before) { }
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60 virtual VMOp_Type type() const { return VMOp_G1CollectFull; }
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61 virtual void doit();
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62 virtual const char* name() const {
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63 return "full garbage-first collection";
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64 }
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65 };
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66
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67 class VM_G1CollectForAllocation: public VM_G1OperationWithAllocRequest {
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68 public:
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69 VM_G1CollectForAllocation(unsigned int gc_count_before,
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70 size_t word_size);
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71 virtual VMOp_Type type() const { return VMOp_G1CollectForAllocation; }
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72 virtual void doit();
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73 virtual const char* name() const {
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74 return "garbage-first collection to satisfy allocation";
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75 }
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76 };
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77
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78 class VM_G1IncCollectionPause: public VM_G1OperationWithAllocRequest {
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79 private:
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80 bool _should_initiate_conc_mark;
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81 bool _should_retry_gc;
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82 double _target_pause_time_ms;
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83 unsigned int _old_marking_cycles_completed_before;
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84 public:
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85 VM_G1IncCollectionPause(unsigned int gc_count_before,
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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,
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89 GCCause::Cause gc_cause);
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90 virtual VMOp_Type type() const { return VMOp_G1IncCollectionPause; }
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91 virtual bool doit_prologue();
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92 virtual void doit();
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93 virtual void doit_epilogue();
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94 virtual const char* name() const {
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95 return "garbage-first incremental collection pause";
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96 }
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97 bool should_retry_gc() const { return _should_retry_gc; }
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98 };
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99
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100 // Concurrent GC stop-the-world operations such as remark and cleanup;
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101 // consider sharing these with CMS's counterparts.
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102 class VM_CGC_Operation: public VM_Operation {
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103 VoidClosure* _cl;
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104 const char* _printGCMessage;
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105 bool _needs_pll;
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106
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107 protected:
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108 // java.lang.ref.Reference support
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109 void acquire_pending_list_lock();
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110 void release_and_notify_pending_list_lock();
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111
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112 public:
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113 VM_CGC_Operation(VoidClosure* cl, const char *printGCMsg, bool needs_pll)
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114 : _cl(cl), _printGCMessage(printGCMsg), _needs_pll(needs_pll) { }
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115 virtual VMOp_Type type() const { return VMOp_CGC_Operation; }
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116 virtual void doit();
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117 virtual bool doit_prologue();
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118 virtual void doit_epilogue();
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119 virtual const char* name() const {
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120 return "concurrent gc";
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121 }
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122 };
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123
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124 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_VM_OPERATIONS_G1_HPP