annotate src/share/vm/gc_implementation/g1/g1CollectorPolicy.hpp @ 1973:631f79e71e90

6974966: G1: unnecessary direct-to-old allocations Summary: This change revamps the slow allocation path of G1. Improvements include the following: a) Allocations directly to old regions are now totally banned. G1 now only allows allocations out of young regions (with the only exception being humongous regions). b) The thread that allocates a new region (which is now guaranteed to be young) does not dirty all its cards. Each thread that successfully allocates out of a young region is now responsible for dirtying the cards that corresponding to the "block" that just got allocated. c) allocate_new_tlab() and mem_allocate() are now implemented differently and TLAB allocations are only done by allocate_new_tlab(). d) If a thread schedules an evacuation pause in order to satisfy an allocation request, it will perform the allocation at the end of the safepoint so that the thread that initiated the GC also gets "first pick" of any space made available by the GC. e) If a thread is unable to allocate a humongous object it will schedule an evacuation pause in case it reclaims enough regions so that the humongous allocation can be satisfied aftewards. f) The G1 policy is more careful to set the young list target length to be the survivor number +1. g) Lots of code tidy up, removal, refactoring to make future changes easier. Reviewed-by: johnc, ysr
author tonyp
date Tue, 24 Aug 2010 17:24:33 -0400
parents f95d63e2154a
children 016a3628c885
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1 /*
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2 * Copyright (c) 2001, 2010, 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_G1COLLECTORPOLICY_HPP
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26 #define SHARE_VM_GC_IMPLEMENTATION_G1_G1COLLECTORPOLICY_HPP
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27
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28 #include "gc_implementation/g1/collectionSetChooser.hpp"
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29 #include "gc_implementation/g1/g1MMUTracker.hpp"
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30 #include "memory/collectorPolicy.hpp"
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31
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32 // A G1CollectorPolicy makes policy decisions that determine the
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33 // characteristics of the collector. Examples include:
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34 // * choice of collection set.
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35 // * when to collect.
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36
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37 class HeapRegion;
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38 class CollectionSetChooser;
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39
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40 // Yes, this is a bit unpleasant... but it saves replicating the same thing
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41 // over and over again and introducing subtle problems through small typos and
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42 // cutting and pasting mistakes. The macros below introduces a number
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43 // sequnce into the following two classes and the methods that access it.
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44
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45 #define define_num_seq(name) \
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46 private: \
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47 NumberSeq _all_##name##_times_ms; \
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48 public: \
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49 void record_##name##_time_ms(double ms) { \
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50 _all_##name##_times_ms.add(ms); \
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51 } \
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52 NumberSeq* get_##name##_seq() { \
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53 return &_all_##name##_times_ms; \
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54 }
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55
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56 class MainBodySummary;
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57
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58 class PauseSummary: public CHeapObj {
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59 define_num_seq(total)
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60 define_num_seq(other)
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61
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62 public:
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63 virtual MainBodySummary* main_body_summary() { return NULL; }
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64 };
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65
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66 class MainBodySummary: public CHeapObj {
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67 define_num_seq(satb_drain) // optional
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68 define_num_seq(parallel) // parallel only
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69 define_num_seq(ext_root_scan)
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70 define_num_seq(mark_stack_scan)
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71 define_num_seq(update_rs)
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72 define_num_seq(scan_rs)
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73 define_num_seq(obj_copy)
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74 define_num_seq(termination) // parallel only
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75 define_num_seq(parallel_other) // parallel only
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76 define_num_seq(mark_closure)
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77 define_num_seq(clear_ct) // parallel only
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78 };
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79
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80 class Summary: public PauseSummary,
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81 public MainBodySummary {
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82 public:
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83 virtual MainBodySummary* main_body_summary() { return this; }
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84 };
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85
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86 class G1CollectorPolicy: public CollectorPolicy {
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87 protected:
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88 // The number of pauses during the execution.
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89 long _n_pauses;
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90
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91 // either equal to the number of parallel threads, if ParallelGCThreads
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92 // has been set, or 1 otherwise
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93 int _parallel_gc_threads;
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94
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95 enum SomePrivateConstants {
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96 NumPrevPausesForHeuristics = 10
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97 };
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98
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99 G1MMUTracker* _mmu_tracker;
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100
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101 void initialize_flags();
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102
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103 void initialize_all() {
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104 initialize_flags();
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105 initialize_size_info();
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106 initialize_perm_generation(PermGen::MarkSweepCompact);
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107 }
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108
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109 virtual size_t default_init_heap_size() {
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110 // Pick some reasonable default.
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111 return 8*M;
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112 }
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113
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114 double _cur_collection_start_sec;
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115 size_t _cur_collection_pause_used_at_start_bytes;
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116 size_t _cur_collection_pause_used_regions_at_start;
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117 size_t _prev_collection_pause_used_at_end_bytes;
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118 double _cur_collection_par_time_ms;
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119 double _cur_satb_drain_time_ms;
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120 double _cur_clear_ct_time_ms;
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121 bool _satb_drain_time_set;
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122
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123 #ifndef PRODUCT
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124 // Card Table Count Cache stats
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125 double _min_clear_cc_time_ms; // min
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126 double _max_clear_cc_time_ms; // max
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127 double _cur_clear_cc_time_ms; // clearing time during current pause
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128 double _cum_clear_cc_time_ms; // cummulative clearing time
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129 jlong _num_cc_clears; // number of times the card count cache has been cleared
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130 #endif
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131
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132 double _cur_CH_strong_roots_end_sec;
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133 double _cur_CH_strong_roots_dur_ms;
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134 double _cur_G1_strong_roots_end_sec;
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135 double _cur_G1_strong_roots_dur_ms;
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136
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137 // Statistics for recent GC pauses. See below for how indexed.
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138 TruncatedSeq* _recent_CH_strong_roots_times_ms;
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139 TruncatedSeq* _recent_G1_strong_roots_times_ms;
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140 TruncatedSeq* _recent_evac_times_ms;
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141 // These exclude marking times.
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142 TruncatedSeq* _recent_pause_times_ms;
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143 TruncatedSeq* _recent_gc_times_ms;
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144
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145 TruncatedSeq* _recent_CS_bytes_used_before;
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146 TruncatedSeq* _recent_CS_bytes_surviving;
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147
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148 TruncatedSeq* _recent_rs_sizes;
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149
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150 TruncatedSeq* _concurrent_mark_init_times_ms;
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151 TruncatedSeq* _concurrent_mark_remark_times_ms;
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152 TruncatedSeq* _concurrent_mark_cleanup_times_ms;
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153
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154 Summary* _summary;
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155
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156 NumberSeq* _all_pause_times_ms;
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157 NumberSeq* _all_full_gc_times_ms;
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158 double _stop_world_start;
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159 NumberSeq* _all_stop_world_times_ms;
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160 NumberSeq* _all_yield_times_ms;
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161
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162 size_t _region_num_young;
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163 size_t _region_num_tenured;
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164 size_t _prev_region_num_young;
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165 size_t _prev_region_num_tenured;
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166
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167 NumberSeq* _all_mod_union_times_ms;
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168
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169 int _aux_num;
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170 NumberSeq* _all_aux_times_ms;
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171 double* _cur_aux_start_times_ms;
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172 double* _cur_aux_times_ms;
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173 bool* _cur_aux_times_set;
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174
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175 double* _par_last_gc_worker_start_times_ms;
342
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176 double* _par_last_ext_root_scan_times_ms;
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177 double* _par_last_mark_stack_scan_times_ms;
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178 double* _par_last_update_rs_times_ms;
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179 double* _par_last_update_rs_processed_buffers;
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180 double* _par_last_scan_rs_times_ms;
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181 double* _par_last_obj_copy_times_ms;
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182 double* _par_last_termination_times_ms;
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183 double* _par_last_termination_attempts;
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184 double* _par_last_gc_worker_end_times_ms;
342
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185
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186 // indicates that we are in young GC mode
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187 bool _in_young_gc_mode;
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188
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189 // indicates whether we are in full young or partially young GC mode
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190 bool _full_young_gcs;
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191
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192 // if true, then it tries to dynamically adjust the length of the
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193 // young list
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194 bool _adaptive_young_list_length;
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195 size_t _young_list_min_length;
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196 size_t _young_list_target_length;
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197 size_t _young_list_fixed_length;
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198
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199 size_t _young_cset_length;
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200 bool _last_young_gc_full;
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201
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202 unsigned _full_young_pause_num;
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203 unsigned _partial_young_pause_num;
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204
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205 bool _during_marking;
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206 bool _in_marking_window;
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207 bool _in_marking_window_im;
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208
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209 SurvRateGroup* _short_lived_surv_rate_group;
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210 SurvRateGroup* _survivor_surv_rate_group;
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211 // add here any more surv rate groups
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212
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213 double _gc_overhead_perc;
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214
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215 bool during_marking() {
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216 return _during_marking;
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217 }
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218
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219 // <NEW PREDICTION>
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220
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221 private:
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222 enum PredictionConstants {
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223 TruncatedSeqLength = 10
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224 };
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225
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226 TruncatedSeq* _alloc_rate_ms_seq;
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227 double _prev_collection_pause_end_ms;
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228
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229 TruncatedSeq* _pending_card_diff_seq;
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230 TruncatedSeq* _rs_length_diff_seq;
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231 TruncatedSeq* _cost_per_card_ms_seq;
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232 TruncatedSeq* _fully_young_cards_per_entry_ratio_seq;
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233 TruncatedSeq* _partially_young_cards_per_entry_ratio_seq;
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234 TruncatedSeq* _cost_per_entry_ms_seq;
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235 TruncatedSeq* _partially_young_cost_per_entry_ms_seq;
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236 TruncatedSeq* _cost_per_byte_ms_seq;
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237 TruncatedSeq* _constant_other_time_ms_seq;
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238 TruncatedSeq* _young_other_cost_per_region_ms_seq;
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239 TruncatedSeq* _non_young_other_cost_per_region_ms_seq;
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240
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241 TruncatedSeq* _pending_cards_seq;
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242 TruncatedSeq* _scanned_cards_seq;
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243 TruncatedSeq* _rs_lengths_seq;
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244
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245 TruncatedSeq* _cost_per_byte_ms_during_cm_seq;
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246
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247 TruncatedSeq* _young_gc_eff_seq;
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248
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249 TruncatedSeq* _max_conc_overhead_seq;
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250
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251 size_t _recorded_young_regions;
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252 size_t _recorded_non_young_regions;
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253 size_t _recorded_region_num;
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254
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255 size_t _free_regions_at_end_of_collection;
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256
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257 size_t _recorded_rs_lengths;
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258 size_t _max_rs_lengths;
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259
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260 size_t _recorded_marked_bytes;
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261 size_t _recorded_young_bytes;
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262
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263 size_t _predicted_pending_cards;
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264 size_t _predicted_cards_scanned;
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265 size_t _predicted_rs_lengths;
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266 size_t _predicted_bytes_to_copy;
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267
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268 double _predicted_survival_ratio;
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269 double _predicted_rs_update_time_ms;
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270 double _predicted_rs_scan_time_ms;
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271 double _predicted_object_copy_time_ms;
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272 double _predicted_constant_other_time_ms;
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273 double _predicted_young_other_time_ms;
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274 double _predicted_non_young_other_time_ms;
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275 double _predicted_pause_time_ms;
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276
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277 double _vtime_diff_ms;
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278
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279 double _recorded_young_free_cset_time_ms;
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280 double _recorded_non_young_free_cset_time_ms;
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281
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282 double _sigma;
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283 double _expensive_region_limit_ms;
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284
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285 size_t _rs_lengths_prediction;
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286
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287 size_t _known_garbage_bytes;
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288 double _known_garbage_ratio;
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289
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290 double sigma() {
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291 return _sigma;
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292 }
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293
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294 // A function that prevents us putting too much stock in small sample
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295 // sets. Returns a number between 2.0 and 1.0, depending on the number
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296 // of samples. 5 or more samples yields one; fewer scales linearly from
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297 // 2.0 at 1 sample to 1.0 at 5.
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298 double confidence_factor(int samples) {
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299 if (samples > 4) return 1.0;
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300 else return 1.0 + sigma() * ((double)(5 - samples))/2.0;
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301 }
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302
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303 double get_new_neg_prediction(TruncatedSeq* seq) {
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304 return seq->davg() - sigma() * seq->dsd();
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305 }
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306
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307 #ifndef PRODUCT
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308 bool verify_young_ages(HeapRegion* head, SurvRateGroup *surv_rate_group);
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309 #endif // PRODUCT
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310
1111
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311 void adjust_concurrent_refinement(double update_rs_time,
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312 double update_rs_processed_buffers,
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313 double goal_ms);
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314
342
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315 protected:
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316 double _pause_time_target_ms;
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317 double _recorded_young_cset_choice_time_ms;
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318 double _recorded_non_young_cset_choice_time_ms;
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319 bool _within_target;
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320 size_t _pending_cards;
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321 size_t _max_pending_cards;
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322
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323 public:
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324
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325 void set_region_short_lived(HeapRegion* hr) {
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326 hr->install_surv_rate_group(_short_lived_surv_rate_group);
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327 }
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328
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329 void set_region_survivors(HeapRegion* hr) {
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330 hr->install_surv_rate_group(_survivor_surv_rate_group);
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331 }
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332
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333 #ifndef PRODUCT
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334 bool verify_young_ages();
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335 #endif // PRODUCT
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336
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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337 double get_new_prediction(TruncatedSeq* seq) {
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338 return MAX2(seq->davg() + sigma() * seq->dsd(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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339 seq->davg() * confidence_factor(seq->num()));
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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340 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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341
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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342 size_t young_cset_length() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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343 return _young_cset_length;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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344 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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345
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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346 void record_max_rs_lengths(size_t rs_lengths) {
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347 _max_rs_lengths = rs_lengths;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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348 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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349
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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350 size_t predict_pending_card_diff() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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351 double prediction = get_new_neg_prediction(_pending_card_diff_seq);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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352 if (prediction < 0.00001)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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353 return 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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354 else
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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355 return (size_t) prediction;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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356 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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357
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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358 size_t predict_pending_cards() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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359 size_t max_pending_card_num = _g1->max_pending_card_num();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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360 size_t diff = predict_pending_card_diff();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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361 size_t prediction;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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362 if (diff > max_pending_card_num)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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363 prediction = max_pending_card_num;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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364 else
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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365 prediction = max_pending_card_num - diff;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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366
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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367 return prediction;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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368 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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369
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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370 size_t predict_rs_length_diff() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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371 return (size_t) get_new_prediction(_rs_length_diff_seq);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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372 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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373
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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374 double predict_alloc_rate_ms() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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375 return get_new_prediction(_alloc_rate_ms_seq);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
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376 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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377
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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378 double predict_cost_per_card_ms() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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379 return get_new_prediction(_cost_per_card_ms_seq);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
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380 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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381
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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382 double predict_rs_update_time_ms(size_t pending_cards) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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383 return (double) pending_cards * predict_cost_per_card_ms();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
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384 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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385
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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386 double predict_fully_young_cards_per_entry_ratio() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
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387 return get_new_prediction(_fully_young_cards_per_entry_ratio_seq);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
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388 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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389
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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390 double predict_partially_young_cards_per_entry_ratio() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
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391 if (_partially_young_cards_per_entry_ratio_seq->num() < 2)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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392 return predict_fully_young_cards_per_entry_ratio();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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393 else
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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394 return get_new_prediction(_partially_young_cards_per_entry_ratio_seq);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
395 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
396
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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397 size_t predict_young_card_num(size_t rs_length) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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398 return (size_t) ((double) rs_length *
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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399 predict_fully_young_cards_per_entry_ratio());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
400 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
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diff changeset
401
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
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402 size_t predict_non_young_card_num(size_t rs_length) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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403 return (size_t) ((double) rs_length *
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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404 predict_partially_young_cards_per_entry_ratio());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
405 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
406
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
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diff changeset
407 double predict_rs_scan_time_ms(size_t card_num) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
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408 if (full_young_gcs())
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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409 return (double) card_num * get_new_prediction(_cost_per_entry_ms_seq);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
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410 else
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
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411 return predict_partially_young_rs_scan_time_ms(card_num);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
412 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
413
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
414 double predict_partially_young_rs_scan_time_ms(size_t card_num) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
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415 if (_partially_young_cost_per_entry_ms_seq->num() < 3)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
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416 return (double) card_num * get_new_prediction(_cost_per_entry_ms_seq);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
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417 else
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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418 return (double) card_num *
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
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419 get_new_prediction(_partially_young_cost_per_entry_ms_seq);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
420 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
421
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
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diff changeset
422 double predict_object_copy_time_ms_during_cm(size_t bytes_to_copy) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
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423 if (_cost_per_byte_ms_during_cm_seq->num() < 3)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
424 return 1.1 * (double) bytes_to_copy *
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
425 get_new_prediction(_cost_per_byte_ms_seq);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
426 else
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
427 return (double) bytes_to_copy *
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
428 get_new_prediction(_cost_per_byte_ms_during_cm_seq);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
429 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
430
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
431 double predict_object_copy_time_ms(size_t bytes_to_copy) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
432 if (_in_marking_window && !_in_marking_window_im)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
433 return predict_object_copy_time_ms_during_cm(bytes_to_copy);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
diff changeset
434 else
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
435 return (double) bytes_to_copy *
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
436 get_new_prediction(_cost_per_byte_ms_seq);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
437 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
438
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
439 double predict_constant_other_time_ms() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
440 return get_new_prediction(_constant_other_time_ms_seq);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
441 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
442
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
443 double predict_young_other_time_ms(size_t young_num) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
444 return
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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diff changeset
445 (double) young_num *
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
446 get_new_prediction(_young_other_cost_per_region_ms_seq);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
447 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
448
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
449 double predict_non_young_other_time_ms(size_t non_young_num) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
diff changeset
450 return
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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diff changeset
451 (double) non_young_num *
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
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diff changeset
452 get_new_prediction(_non_young_other_cost_per_region_ms_seq);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
453 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
454
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
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diff changeset
455 void check_if_region_is_too_expensive(double predicted_time_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
456
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
457 double predict_young_collection_elapsed_time_ms(size_t adjustment);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
458 double predict_base_elapsed_time_ms(size_t pending_cards);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
459 double predict_base_elapsed_time_ms(size_t pending_cards,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
460 size_t scanned_cards);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
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diff changeset
461 size_t predict_bytes_to_copy(HeapRegion* hr);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
462 double predict_region_elapsed_time_ms(HeapRegion* hr, bool young);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
463
1394
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
464 // for use by: calculate_young_list_target_length(rs_length)
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
465 bool predict_will_fit(size_t young_region_num,
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
466 double base_time_ms,
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
467 size_t init_free_regions,
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
468 double target_pause_time_ms);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
469
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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diff changeset
470 void start_recording_regions();
1394
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
471 void record_cset_region_info(HeapRegion* hr, bool young);
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
472 void record_non_young_cset_region(HeapRegion* hr);
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
473
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
474 void set_recorded_young_regions(size_t n_regions);
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
475 void set_recorded_young_bytes(size_t bytes);
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
476 void set_recorded_rs_lengths(size_t rs_lengths);
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
477 void set_predicted_bytes_to_copy(size_t bytes);
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
478
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
diff changeset
479 void end_recording_regions();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
480
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
481 void record_vtime_diff_ms(double vtime_diff_ms) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
482 _vtime_diff_ms = vtime_diff_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
483 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
484
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
485 void record_young_free_cset_time_ms(double time_ms) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
486 _recorded_young_free_cset_time_ms = time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
487 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
488
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
489 void record_non_young_free_cset_time_ms(double time_ms) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
490 _recorded_non_young_free_cset_time_ms = time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
491 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
492
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
493 double predict_young_gc_eff() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
494 return get_new_neg_prediction(_young_gc_eff_seq);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
495 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
496
545
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
497 double predict_survivor_regions_evac_time();
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
498
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
499 // </NEW PREDICTION>
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
500
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
501 public:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
502 void cset_regions_freed() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
503 bool propagate = _last_young_gc_full && !_in_marking_window;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
504 _short_lived_surv_rate_group->all_surviving_words_recorded(propagate);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
505 _survivor_surv_rate_group->all_surviving_words_recorded(propagate);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
506 // also call it on any more surv rate groups
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
507 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
508
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
509 void set_known_garbage_bytes(size_t known_garbage_bytes) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
510 _known_garbage_bytes = known_garbage_bytes;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
511 size_t heap_bytes = _g1->capacity();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
512 _known_garbage_ratio = (double) _known_garbage_bytes / (double) heap_bytes;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
513 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
514
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
515 void decrease_known_garbage_bytes(size_t known_garbage_bytes) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
516 guarantee( _known_garbage_bytes >= known_garbage_bytes, "invariant" );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
517
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
518 _known_garbage_bytes -= known_garbage_bytes;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
519 size_t heap_bytes = _g1->capacity();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
520 _known_garbage_ratio = (double) _known_garbage_bytes / (double) heap_bytes;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
521 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
522
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
523 G1MMUTracker* mmu_tracker() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
524 return _mmu_tracker;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
525 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
526
1656
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly
tonyp
parents: 1611
diff changeset
527 double max_pause_time_ms() {
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly
tonyp
parents: 1611
diff changeset
528 return _mmu_tracker->max_gc_time() * 1000.0;
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly
tonyp
parents: 1611
diff changeset
529 }
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly
tonyp
parents: 1611
diff changeset
530
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
531 double predict_init_time_ms() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
532 return get_new_prediction(_concurrent_mark_init_times_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
533 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
534
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
535 double predict_remark_time_ms() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
536 return get_new_prediction(_concurrent_mark_remark_times_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
537 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
538
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
539 double predict_cleanup_time_ms() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
540 return get_new_prediction(_concurrent_mark_cleanup_times_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
541 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
542
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
543 // Returns an estimate of the survival rate of the region at yg-age
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
544 // "yg_age".
545
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
545 double predict_yg_surv_rate(int age, SurvRateGroup* surv_rate_group) {
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
546 TruncatedSeq* seq = surv_rate_group->get_seq(age);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
547 if (seq->num() == 0)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
548 gclog_or_tty->print("BARF! age is %d", age);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
549 guarantee( seq->num() > 0, "invariant" );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
550 double pred = get_new_prediction(seq);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
551 if (pred > 1.0)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
552 pred = 1.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
553 return pred;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
554 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
555
545
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
556 double predict_yg_surv_rate(int age) {
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
557 return predict_yg_surv_rate(age, _short_lived_surv_rate_group);
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
558 }
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
559
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
560 double accum_yg_surv_rate_pred(int age) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
561 return _short_lived_surv_rate_group->accum_surv_rate_pred(age);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
562 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
563
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
564 protected:
1611
215576b54709 6946048: G1: improvements to +PrintGCDetails output
tonyp
parents: 1552
diff changeset
565 void print_stats(int level, const char* str, double value);
215576b54709 6946048: G1: improvements to +PrintGCDetails output
tonyp
parents: 1552
diff changeset
566 void print_stats(int level, const char* str, int value);
215576b54709 6946048: G1: improvements to +PrintGCDetails output
tonyp
parents: 1552
diff changeset
567
215576b54709 6946048: G1: improvements to +PrintGCDetails output
tonyp
parents: 1552
diff changeset
568 void print_par_stats(int level, const char* str, double* data) {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
569 print_par_stats(level, str, data, true);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
570 }
1611
215576b54709 6946048: G1: improvements to +PrintGCDetails output
tonyp
parents: 1552
diff changeset
571 void print_par_stats(int level, const char* str, double* data, bool summary);
215576b54709 6946048: G1: improvements to +PrintGCDetails output
tonyp
parents: 1552
diff changeset
572 void print_par_sizes(int level, const char* str, double* data, bool summary);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
573
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
574 void check_other_times(int level,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
575 NumberSeq* other_times_ms,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
576 NumberSeq* calc_other_times_ms) const;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
577
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
578 void print_summary (PauseSummary* stats) const;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
579
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
580 void print_summary (int level, const char* str, NumberSeq* seq) const;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
581 void print_summary_sd (int level, const char* str, NumberSeq* seq) const;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
582
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
583 double avg_value (double* data);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
584 double max_value (double* data);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
585 double sum_of_values (double* data);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
586 double max_sum (double* data1, double* data2);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
587
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
588 int _last_satb_drain_processed_buffers;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
589 int _last_update_rs_processed_buffers;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
590 double _last_pause_time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
591
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
592 size_t _bytes_in_to_space_before_gc;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
593 size_t _bytes_in_to_space_after_gc;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
594 size_t bytes_in_to_space_during_gc() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
595 return
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
596 _bytes_in_to_space_after_gc - _bytes_in_to_space_before_gc;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
597 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
598 size_t _bytes_in_collection_set_before_gc;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
599 // Used to count used bytes in CS.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
600 friend class CountCSClosure;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
601
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
602 // Statistics kept per GC stoppage, pause or full.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
603 TruncatedSeq* _recent_prev_end_times_for_all_gcs_sec;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
604
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
605 // We track markings.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
606 int _num_markings;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
607 double _mark_thread_startup_sec; // Time at startup of marking thread
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
608
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
609 // Add a new GC of the given duration and end time to the record.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
610 void update_recent_gc_times(double end_time_sec, double elapsed_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
611
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
612 // The head of the list (via "next_in_collection_set()") representing the
1394
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
613 // current collection set. Set from the incrementally built collection
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
614 // set at the start of the pause.
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
615 HeapRegion* _collection_set;
1394
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
616
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
617 // The number of regions in the collection set. Set from the incrementally
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
618 // built collection set at the start of an evacuation pause.
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
619 size_t _collection_set_size;
1394
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
620
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
621 // The number of bytes in the collection set before the pause. Set from
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
622 // the incrementally built collection set at the start of an evacuation
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
623 // pause.
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
624 size_t _collection_set_bytes_used_before;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
625
1394
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
626 // The associated information that is maintained while the incremental
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
627 // collection set is being built with young regions. Used to populate
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
628 // the recorded info for the evacuation pause.
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
629
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
630 enum CSetBuildType {
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
631 Active, // We are actively building the collection set
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
632 Inactive // We are not actively building the collection set
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
633 };
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
634
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
635 CSetBuildType _inc_cset_build_state;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
636
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
637 // The head of the incrementally built collection set.
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
638 HeapRegion* _inc_cset_head;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
639
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
640 // The tail of the incrementally built collection set.
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
641 HeapRegion* _inc_cset_tail;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
642
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
643 // The number of regions in the incrementally built collection set.
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
644 // Used to set _collection_set_size at the start of an evacuation
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
645 // pause.
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
646 size_t _inc_cset_size;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
647
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
648 // Used as the index in the surving young words structure
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
649 // which tracks the amount of space, for each young region,
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
650 // that survives the pause.
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
651 size_t _inc_cset_young_index;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
652
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
653 // The number of bytes in the incrementally built collection set.
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
654 // Used to set _collection_set_bytes_used_before at the start of
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
655 // an evacuation pause.
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
656 size_t _inc_cset_bytes_used_before;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
657
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
658 // Used to record the highest end of heap region in collection set
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
659 HeapWord* _inc_cset_max_finger;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
660
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
661 // The number of recorded used bytes in the young regions
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
662 // of the collection set. This is the sum of the used() bytes
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
663 // of retired young regions in the collection set.
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
664 size_t _inc_cset_recorded_young_bytes;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
665
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
666 // The RSet lengths recorded for regions in the collection set
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
667 // (updated by the periodic sampling of the regions in the
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
668 // young list/collection set).
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
669 size_t _inc_cset_recorded_rs_lengths;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
670
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
671 // The predicted elapsed time it will take to collect the regions
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
672 // in the collection set (updated by the periodic sampling of the
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
673 // regions in the young list/collection set).
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
674 double _inc_cset_predicted_elapsed_time_ms;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
675
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
676 // The predicted bytes to copy for the regions in the collection
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
677 // set (updated by the periodic sampling of the regions in the
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
678 // young list/collection set).
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
679 size_t _inc_cset_predicted_bytes_to_copy;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
680
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
681 // Info about marking.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
682 int _n_marks; // Sticky at 2, so we know when we've done at least 2.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
683
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
684 // The number of collection pauses at the end of the last mark.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
685 size_t _n_pauses_at_mark_end;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
686
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
687 // Stash a pointer to the g1 heap.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
688 G1CollectedHeap* _g1;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
689
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
690 // The average time in ms per collection pause, averaged over recent pauses.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
691 double recent_avg_time_for_pauses_ms();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
692
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
693 // The average time in ms for processing CollectedHeap strong roots, per
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
694 // collection pause, averaged over recent pauses.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
695 double recent_avg_time_for_CH_strong_ms();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
696
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
697 // The average time in ms for processing the G1 remembered set, per
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
698 // pause, averaged over recent pauses.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
699 double recent_avg_time_for_G1_strong_ms();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
700
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
701 // The average time in ms for "evacuating followers", per pause, averaged
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
702 // over recent pauses.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
703 double recent_avg_time_for_evac_ms();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
704
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
705 // The number of "recent" GCs recorded in the number sequences
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
706 int number_of_recent_gcs();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
707
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
708 // The average survival ratio, computed by the total number of bytes
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
709 // suriviving / total number of bytes before collection over the last
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
710 // several recent pauses.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
711 double recent_avg_survival_fraction();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
712 // The survival fraction of the most recent pause; if there have been no
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
713 // pauses, returns 1.0.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
714 double last_survival_fraction();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
715
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
716 // Returns a "conservative" estimate of the recent survival rate, i.e.,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
717 // one that may be higher than "recent_avg_survival_fraction".
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
718 // This is conservative in several ways:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
719 // If there have been few pauses, it will assume a potential high
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
720 // variance, and err on the side of caution.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
721 // It puts a lower bound (currently 0.1) on the value it will return.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
722 // To try to detect phase changes, if the most recent pause ("latest") has a
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
723 // higher-than average ("avg") survival rate, it returns that rate.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
724 // "work" version is a utility function; young is restricted to young regions.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
725 double conservative_avg_survival_fraction_work(double avg,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
726 double latest);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
727
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
728 // The arguments are the two sequences that keep track of the number of bytes
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
729 // surviving and the total number of bytes before collection, resp.,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
730 // over the last evereal recent pauses
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
731 // Returns the survival rate for the category in the most recent pause.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
732 // If there have been no pauses, returns 1.0.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
733 double last_survival_fraction_work(TruncatedSeq* surviving,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
734 TruncatedSeq* before);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
735
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
736 // The arguments are the two sequences that keep track of the number of bytes
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
737 // surviving and the total number of bytes before collection, resp.,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
738 // over the last several recent pauses
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
739 // Returns the average survival ration over the last several recent pauses
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
740 // If there have been no pauses, return 1.0
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
741 double recent_avg_survival_fraction_work(TruncatedSeq* surviving,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
742 TruncatedSeq* before);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
743
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
744 double conservative_avg_survival_fraction() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
745 double avg = recent_avg_survival_fraction();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
746 double latest = last_survival_fraction();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
747 return conservative_avg_survival_fraction_work(avg, latest);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
748 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
749
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
750 // The ratio of gc time to elapsed time, computed over recent pauses.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
751 double _recent_avg_pause_time_ratio;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
752
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
753 double recent_avg_pause_time_ratio() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
754 return _recent_avg_pause_time_ratio;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
755 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
756
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
757 // Number of pauses between concurrent marking.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
758 size_t _pauses_btwn_concurrent_mark;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
759
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
760 size_t _n_marks_since_last_pause;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
761
1359
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
762 // At the end of a pause we check the heap occupancy and we decide
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
763 // whether we will start a marking cycle during the next pause. If
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
764 // we decide that we want to do that, we will set this parameter to
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
765 // true. So, this parameter will stay true between the end of a
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
766 // pause and the beginning of a subsequent pause (not necessarily
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
767 // the next one, see the comments on the next field) when we decide
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
768 // that we will indeed start a marking cycle and do the initial-mark
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
769 // work.
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
770 volatile bool _initiate_conc_mark_if_possible;
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
771
1359
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
772 // If initiate_conc_mark_if_possible() is set at the beginning of a
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
773 // pause, it is a suggestion that the pause should start a marking
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
774 // cycle by doing the initial-mark work. However, it is possible
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
775 // that the concurrent marking thread is still finishing up the
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
776 // previous marking cycle (e.g., clearing the next marking
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
777 // bitmap). If that is the case we cannot start a new cycle and
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
778 // we'll have to wait for the concurrent marking thread to finish
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
779 // what it is doing. In this case we will postpone the marking cycle
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
780 // initiation decision for the next pause. When we eventually decide
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
781 // to start a cycle, we will set _during_initial_mark_pause which
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
782 // will stay true until the end of the initial-mark pause and it's
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
783 // the condition that indicates that a pause is doing the
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
784 // initial-mark work.
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
785 volatile bool _during_initial_mark_pause;
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
786
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
787 bool _should_revert_to_full_young_gcs;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
788 bool _last_full_young_gc;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
789
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
790 // This set of variables tracks the collector efficiency, in order to
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
791 // determine whether we should initiate a new marking.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
792 double _cur_mark_stop_world_time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
793 double _mark_init_start_sec;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
794 double _mark_remark_start_sec;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
795 double _mark_cleanup_start_sec;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
796 double _mark_closure_time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
797
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
798 void calculate_young_list_min_length();
1394
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
799 void calculate_young_list_target_length();
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
800 void calculate_young_list_target_length(size_t rs_lengths);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
801
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
802 public:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
803
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
804 G1CollectorPolicy();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
805
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
806 virtual G1CollectorPolicy* as_g1_policy() { return this; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
807
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
808 virtual CollectorPolicy::Name kind() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
809 return CollectorPolicy::G1CollectorPolicyKind;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
810 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
811
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
812 void check_prediction_validity();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
813
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
814 size_t bytes_in_collection_set() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
815 return _bytes_in_collection_set_before_gc;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
816 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
817
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
818 size_t bytes_in_to_space() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
819 return bytes_in_to_space_during_gc();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
820 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
821
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
822 unsigned calc_gc_alloc_time_stamp() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
823 return _all_pause_times_ms->num() + 1;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
824 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
825
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
826 protected:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
827
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
828 // Count the number of bytes used in the CS.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
829 void count_CS_bytes_used();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
830
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
831 // Together these do the base cleanup-recording work. Subclasses might
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
832 // want to put something between them.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
833 void record_concurrent_mark_cleanup_end_work1(size_t freed_bytes,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
834 size_t max_live_bytes);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
835 void record_concurrent_mark_cleanup_end_work2();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
836
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
837 public:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
838
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
839 virtual void init();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
840
545
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
841 // Create jstat counters for the policy.
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
842 virtual void initialize_gc_policy_counters();
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
843
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
844 virtual HeapWord* mem_allocate_work(size_t size,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
845 bool is_tlab,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
846 bool* gc_overhead_limit_was_exceeded);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
847
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
848 // This method controls how a collector handles one or more
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
849 // of its generations being fully allocated.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
850 virtual HeapWord* satisfy_failed_allocation(size_t size,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
851 bool is_tlab);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
852
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
853 BarrierSet::Name barrier_set_name() { return BarrierSet::G1SATBCTLogging; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
854
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
855 GenRemSet::Name rem_set_name() { return GenRemSet::CardTable; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
856
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
857 // The number of collection pauses so far.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
858 long n_pauses() const { return _n_pauses; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
859
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
860 // Update the heuristic info to record a collection pause of the given
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
861 // start time, where the given number of bytes were used at the start.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
862 // This may involve changing the desired size of a collection set.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
863
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
864 virtual void record_stop_world_start();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
865
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
866 virtual void record_collection_pause_start(double start_time_sec,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
867 size_t start_used);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
868
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
869 // Must currently be called while the world is stopped.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
870 virtual void record_concurrent_mark_init_start();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
871 virtual void record_concurrent_mark_init_end();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
872 void record_concurrent_mark_init_end_pre(double
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
873 mark_init_elapsed_time_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
874
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
875 void record_mark_closure_time(double mark_closure_time_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
876
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
877 virtual void record_concurrent_mark_remark_start();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
878 virtual void record_concurrent_mark_remark_end();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
879
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
880 virtual void record_concurrent_mark_cleanup_start();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
881 virtual void record_concurrent_mark_cleanup_end(size_t freed_bytes,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
882 size_t max_live_bytes);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
883 virtual void record_concurrent_mark_cleanup_completed();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
884
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
885 virtual void record_concurrent_pause();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
886 virtual void record_concurrent_pause_end();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
887
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
888 virtual void record_collection_pause_end_CH_strong_roots();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
889 virtual void record_collection_pause_end_G1_strong_roots();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
890
1707
0ce1569c90e5 6963209: G1: remove the concept of abandoned pauses
tonyp
parents: 1705
diff changeset
891 virtual void record_collection_pause_end();
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
892
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
893 // Record the fact that a full collection occurred.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
894 virtual void record_full_collection_start();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
895 virtual void record_full_collection_end();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
896
1611
215576b54709 6946048: G1: improvements to +PrintGCDetails output
tonyp
parents: 1552
diff changeset
897 void record_gc_worker_start_time(int worker_i, double ms) {
215576b54709 6946048: G1: improvements to +PrintGCDetails output
tonyp
parents: 1552
diff changeset
898 _par_last_gc_worker_start_times_ms[worker_i] = ms;
215576b54709 6946048: G1: improvements to +PrintGCDetails output
tonyp
parents: 1552
diff changeset
899 }
215576b54709 6946048: G1: improvements to +PrintGCDetails output
tonyp
parents: 1552
diff changeset
900
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
901 void record_ext_root_scan_time(int worker_i, double ms) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
902 _par_last_ext_root_scan_times_ms[worker_i] = ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
903 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
904
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
905 void record_mark_stack_scan_time(int worker_i, double ms) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
906 _par_last_mark_stack_scan_times_ms[worker_i] = ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
907 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
908
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
909 void record_satb_drain_time(double ms) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
910 _cur_satb_drain_time_ms = ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
911 _satb_drain_time_set = true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
912 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
913
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
914 void record_satb_drain_processed_buffers (int processed_buffers) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
915 _last_satb_drain_processed_buffers = processed_buffers;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
916 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
917
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
918 void record_mod_union_time(double ms) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
919 _all_mod_union_times_ms->add(ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
920 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
921
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
922 void record_update_rs_time(int thread, double ms) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
923 _par_last_update_rs_times_ms[thread] = ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
924 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
925
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
926 void record_update_rs_processed_buffers (int thread,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
927 double processed_buffers) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
928 _par_last_update_rs_processed_buffers[thread] = processed_buffers;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
929 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
930
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
931 void record_scan_rs_time(int thread, double ms) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
932 _par_last_scan_rs_times_ms[thread] = ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
933 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
934
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
935 void reset_obj_copy_time(int thread) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
936 _par_last_obj_copy_times_ms[thread] = 0.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
937 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
938
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
939 void reset_obj_copy_time() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
940 reset_obj_copy_time(0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
941 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
942
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
943 void record_obj_copy_time(int thread, double ms) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
944 _par_last_obj_copy_times_ms[thread] += ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
945 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
946
1611
215576b54709 6946048: G1: improvements to +PrintGCDetails output
tonyp
parents: 1552
diff changeset
947 void record_termination(int thread, double ms, size_t attempts) {
215576b54709 6946048: G1: improvements to +PrintGCDetails output
tonyp
parents: 1552
diff changeset
948 _par_last_termination_times_ms[thread] = ms;
215576b54709 6946048: G1: improvements to +PrintGCDetails output
tonyp
parents: 1552
diff changeset
949 _par_last_termination_attempts[thread] = (double) attempts;
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
950 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
951
1611
215576b54709 6946048: G1: improvements to +PrintGCDetails output
tonyp
parents: 1552
diff changeset
952 void record_gc_worker_end_time(int worker_i, double ms) {
215576b54709 6946048: G1: improvements to +PrintGCDetails output
tonyp
parents: 1552
diff changeset
953 _par_last_gc_worker_end_times_ms[worker_i] = ms;
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
954 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
955
595
3698e8f47799 6804746: G1: guarantee(variance() > -1.0,"variance should be >= 0") (due to evacuation failure)
tonyp
parents: 549
diff changeset
956 void record_pause_time_ms(double ms) {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
957 _last_pause_time_ms = ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
958 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
959
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
960 void record_clear_ct_time(double ms) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
961 _cur_clear_ct_time_ms = ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
962 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
963
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
964 void record_par_time(double ms) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
965 _cur_collection_par_time_ms = ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
966 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
967
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
968 void record_aux_start_time(int i) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
969 guarantee(i < _aux_num, "should be within range");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
970 _cur_aux_start_times_ms[i] = os::elapsedTime() * 1000.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
971 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
972
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
973 void record_aux_end_time(int i) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
974 guarantee(i < _aux_num, "should be within range");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
975 double ms = os::elapsedTime() * 1000.0 - _cur_aux_start_times_ms[i];
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
976 _cur_aux_times_set[i] = true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
977 _cur_aux_times_ms[i] += ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
978 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
979
890
6cb8e9df7174 6819077: G1: first GC thread coming late into the GC.
johnc
parents: 838
diff changeset
980 #ifndef PRODUCT
6cb8e9df7174 6819077: G1: first GC thread coming late into the GC.
johnc
parents: 838
diff changeset
981 void record_cc_clear_time(double ms) {
6cb8e9df7174 6819077: G1: first GC thread coming late into the GC.
johnc
parents: 838
diff changeset
982 if (_min_clear_cc_time_ms < 0.0 || ms <= _min_clear_cc_time_ms)
6cb8e9df7174 6819077: G1: first GC thread coming late into the GC.
johnc
parents: 838
diff changeset
983 _min_clear_cc_time_ms = ms;
6cb8e9df7174 6819077: G1: first GC thread coming late into the GC.
johnc
parents: 838
diff changeset
984 if (_max_clear_cc_time_ms < 0.0 || ms >= _max_clear_cc_time_ms)
6cb8e9df7174 6819077: G1: first GC thread coming late into the GC.
johnc
parents: 838
diff changeset
985 _max_clear_cc_time_ms = ms;
6cb8e9df7174 6819077: G1: first GC thread coming late into the GC.
johnc
parents: 838
diff changeset
986 _cur_clear_cc_time_ms = ms;
6cb8e9df7174 6819077: G1: first GC thread coming late into the GC.
johnc
parents: 838
diff changeset
987 _cum_clear_cc_time_ms += ms;
6cb8e9df7174 6819077: G1: first GC thread coming late into the GC.
johnc
parents: 838
diff changeset
988 _num_cc_clears++;
6cb8e9df7174 6819077: G1: first GC thread coming late into the GC.
johnc
parents: 838
diff changeset
989 }
6cb8e9df7174 6819077: G1: first GC thread coming late into the GC.
johnc
parents: 838
diff changeset
990 #endif
6cb8e9df7174 6819077: G1: first GC thread coming late into the GC.
johnc
parents: 838
diff changeset
991
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
992 // Record the fact that "bytes" bytes allocated in a region.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
993 void record_before_bytes(size_t bytes);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
994 void record_after_bytes(size_t bytes);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
995
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
996 // Choose a new collection set. Marks the chosen regions as being
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
997 // "in_collection_set", and links them together. The head and number of
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
998 // the collection set are available via access methods.
1707
0ce1569c90e5 6963209: G1: remove the concept of abandoned pauses
tonyp
parents: 1705
diff changeset
999 virtual void choose_collection_set(double target_pause_time_ms) = 0;
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1000
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1001 // The head of the list (via "next_in_collection_set()") representing the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1002 // current collection set.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1003 HeapRegion* collection_set() { return _collection_set; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1004
1394
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
1005 void clear_collection_set() { _collection_set = NULL; }
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
1006
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1007 // The number of elements in the current collection set.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1008 size_t collection_set_size() { return _collection_set_size; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1009
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1010 // Add "hr" to the CS.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1011 void add_to_collection_set(HeapRegion* hr);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1012
1394
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
1013 // Incremental CSet Support
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
1014
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
1015 // The head of the incrementally built collection set.
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
1016 HeapRegion* inc_cset_head() { return _inc_cset_head; }
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
1017
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
1018 // The tail of the incrementally built collection set.
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
1019 HeapRegion* inc_set_tail() { return _inc_cset_tail; }
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
1020
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
1021 // The number of elements in the incrementally built collection set.
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
1022 size_t inc_cset_size() { return _inc_cset_size; }
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
1023
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
1024 // Initialize incremental collection set info.
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
1025 void start_incremental_cset_building();
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
1026
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
1027 void clear_incremental_cset() {
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
1028 _inc_cset_head = NULL;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
1029 _inc_cset_tail = NULL;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
1030 }
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
1031
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
1032 // Stop adding regions to the incremental collection set
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
1033 void stop_incremental_cset_building() { _inc_cset_build_state = Inactive; }
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
1034
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
1035 // Add/remove information about hr to the aggregated information
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
1036 // for the incrementally built collection set.
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
1037 void add_to_incremental_cset_info(HeapRegion* hr, size_t rs_length);
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
1038 void remove_from_incremental_cset_info(HeapRegion* hr);
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
1039
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
1040 // Update information about hr in the aggregated information for
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
1041 // the incrementally built collection set.
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
1042 void update_incremental_cset_info(HeapRegion* hr, size_t new_rs_length);
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
1043
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
1044 private:
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
1045 // Update the incremental cset information when adding a region
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
1046 // (should not be called directly).
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
1047 void add_region_to_incremental_cset_common(HeapRegion* hr);
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
1048
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
1049 public:
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
1050 // Add hr to the LHS of the incremental collection set.
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
1051 void add_region_to_incremental_cset_lhs(HeapRegion* hr);
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
1052
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
1053 // Add hr to the RHS of the incremental collection set.
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
1054 void add_region_to_incremental_cset_rhs(HeapRegion* hr);
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
1055
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
1056 #ifndef PRODUCT
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
1057 void print_collection_set(HeapRegion* list_head, outputStream* st);
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
1058 #endif // !PRODUCT
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1359
diff changeset
1059
1359
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
1060 bool initiate_conc_mark_if_possible() { return _initiate_conc_mark_if_possible; }
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
1061 void set_initiate_conc_mark_if_possible() { _initiate_conc_mark_if_possible = true; }
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
1062 void clear_initiate_conc_mark_if_possible() { _initiate_conc_mark_if_possible = false; }
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
1063
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
1064 bool during_initial_mark_pause() { return _during_initial_mark_pause; }
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
1065 void set_during_initial_mark_pause() { _during_initial_mark_pause = true; }
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
1066 void clear_during_initial_mark_pause(){ _during_initial_mark_pause = false; }
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
1067
1656
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly
tonyp
parents: 1611
diff changeset
1068 // This sets the initiate_conc_mark_if_possible() flag to start a
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly
tonyp
parents: 1611
diff changeset
1069 // new cycle, as long as we are not already in one. It's best if it
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly
tonyp
parents: 1611
diff changeset
1070 // is called during a safepoint when the test whether a cycle is in
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly
tonyp
parents: 1611
diff changeset
1071 // progress or not is stable.
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly
tonyp
parents: 1611
diff changeset
1072 bool force_initial_mark_if_outside_cycle();
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly
tonyp
parents: 1611
diff changeset
1073
1359
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
1074 // This is called at the very beginning of an evacuation pause (it
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
1075 // has to be the first thing that the pause does). If
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
1076 // initiate_conc_mark_if_possible() is true, and the concurrent
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
1077 // marking thread has completed its work during the previous cycle,
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
1078 // it will set during_initial_mark_pause() to so that the pause does
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
1079 // the initial-mark work and start a marking cycle.
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
1080 void decide_on_conc_mark_initiation();
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1081
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1082 // If an expansion would be appropriate, because recent GC overhead had
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1083 // exceeded the desired limit, return an amount to expand by.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1084 virtual size_t expansion_amount();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1085
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1086 // note start of mark thread
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1087 void note_start_of_mark_thread();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1088
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1089 // The marked bytes of the "r" has changed; reclassify it's desirability
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1090 // for marking. Also asserts that "r" is eligible for a CS.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1091 virtual void note_change_in_marked_bytes(HeapRegion* r) = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1092
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1093 #ifndef PRODUCT
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1094 // Check any appropriate marked bytes info, asserting false if
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1095 // something's wrong, else returning "true".
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1096 virtual bool assertMarkedBytesDataOK() = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1097 #endif
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1098
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1099 // Print tracing information.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1100 void print_tracing_info() const;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1101
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1102 // Print stats on young survival ratio
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1103 void print_yg_surv_rate_info() const;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1104
545
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
1105 void finished_recalculating_age_indexes(bool is_survivors) {
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
1106 if (is_survivors) {
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
1107 _survivor_surv_rate_group->finished_recalculating_age_indexes();
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
1108 } else {
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
1109 _short_lived_surv_rate_group->finished_recalculating_age_indexes();
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
1110 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1111 // do that for any other surv rate groups
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1112 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1113
1973
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations
tonyp
parents: 1972
diff changeset
1114 bool is_young_list_full() {
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations
tonyp
parents: 1972
diff changeset
1115 size_t young_list_length = _g1->young_list()->length();
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations
tonyp
parents: 1972
diff changeset
1116 size_t young_list_max_length = _young_list_target_length;
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations
tonyp
parents: 1972
diff changeset
1117 if (G1FixedEdenSize) {
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations
tonyp
parents: 1972
diff changeset
1118 young_list_max_length -= _max_survivor_regions;
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations
tonyp
parents: 1972
diff changeset
1119 }
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations
tonyp
parents: 1972
diff changeset
1120
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations
tonyp
parents: 1972
diff changeset
1121 return young_list_length >= young_list_max_length;
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations
tonyp
parents: 1972
diff changeset
1122 }
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations
tonyp
parents: 1972
diff changeset
1123 void update_region_num(bool young);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1124
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1125 bool in_young_gc_mode() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1126 return _in_young_gc_mode;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1127 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1128 void set_in_young_gc_mode(bool in_young_gc_mode) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1129 _in_young_gc_mode = in_young_gc_mode;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1130 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1131
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1132 bool full_young_gcs() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1133 return _full_young_gcs;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1134 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1135 void set_full_young_gcs(bool full_young_gcs) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1136 _full_young_gcs = full_young_gcs;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1137 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1138
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1139 bool adaptive_young_list_length() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1140 return _adaptive_young_list_length;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1141 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1142 void set_adaptive_young_list_length(bool adaptive_young_list_length) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1143 _adaptive_young_list_length = adaptive_young_list_length;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1144 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1145
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1146 inline double get_gc_eff_factor() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1147 double ratio = _known_garbage_ratio;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1148
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1149 double square = ratio * ratio;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1150 // square = square * square;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1151 double ret = square * 9.0 + 1.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1152 #if 0
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1153 gclog_or_tty->print_cr("ratio = %1.2lf, ret = %1.2lf", ratio, ret);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1154 #endif // 0
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1155 guarantee(0.0 <= ret && ret < 10.0, "invariant!");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1156 return ret;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1157 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1158
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1159 //
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1160 // Survivor regions policy.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1161 //
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1162 protected:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1163
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1164 // Current tenuring threshold, set to 0 if the collector reaches the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1165 // maximum amount of suvivors regions.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1166 int _tenuring_threshold;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1167
545
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
1168 // The limit on the number of regions allocated for survivors.
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
1169 size_t _max_survivor_regions;
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
1170
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
1171 // The amount of survor regions after a collection.
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
1172 size_t _recorded_survivor_regions;
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
1173 // List of survivor regions.
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
1174 HeapRegion* _recorded_survivor_head;
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
1175 HeapRegion* _recorded_survivor_tail;
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
1176
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
1177 ageTable _survivors_age_table;
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
1178
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1179 public:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1180
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1181 inline GCAllocPurpose
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1182 evacuation_destination(HeapRegion* src_region, int age, size_t word_sz) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1183 if (age < _tenuring_threshold && src_region->is_young()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1184 return GCAllocForSurvived;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1185 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1186 return GCAllocForTenured;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1187 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1188 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1189
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1190 inline bool track_object_age(GCAllocPurpose purpose) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1191 return purpose == GCAllocForSurvived;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1192 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1193
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1194 inline GCAllocPurpose alternative_purpose(int purpose) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1195 return GCAllocForTenured;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1196 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1197
545
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
1198 static const size_t REGIONS_UNLIMITED = ~(size_t)0;
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
1199
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
1200 size_t max_regions(int purpose);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1201
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1202 // The limit on regions for a particular purpose is reached.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1203 void note_alloc_region_limit_reached(int purpose) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1204 if (purpose == GCAllocForSurvived) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1205 _tenuring_threshold = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1206 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1207 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1208
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1209 void note_start_adding_survivor_regions() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1210 _survivor_surv_rate_group->start_adding_regions();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1211 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1212
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1213 void note_stop_adding_survivor_regions() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1214 _survivor_surv_rate_group->stop_adding_regions();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1215 }
545
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
1216
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
1217 void record_survivor_regions(size_t regions,
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
1218 HeapRegion* head,
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
1219 HeapRegion* tail) {
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
1220 _recorded_survivor_regions = regions;
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
1221 _recorded_survivor_head = head;
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
1222 _recorded_survivor_tail = tail;
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
1223 }
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
1224
838
0316eac49d5a 6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents: 794
diff changeset
1225 size_t recorded_survivor_regions() {
0316eac49d5a 6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents: 794
diff changeset
1226 return _recorded_survivor_regions;
0316eac49d5a 6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents: 794
diff changeset
1227 }
0316eac49d5a 6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents: 794
diff changeset
1228
545
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
1229 void record_thread_age_table(ageTable* age_table)
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
1230 {
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
1231 _survivors_age_table.merge_par(age_table);
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
1232 }
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
1233
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
1234 // Calculates survivor space parameters.
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
1235 void calculate_survivors_policy();
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
1236
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1237 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1238
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1239 // This encapsulates a particular strategy for a g1 Collector.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1240 //
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1241 // Start a concurrent mark when our heap size is n bytes
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1242 // greater then our heap size was at the last concurrent
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1243 // mark. Where n is a function of the CMSTriggerRatio
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1244 // and the MinHeapFreeRatio.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1245 //
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1246 // Start a g1 collection pause when we have allocated the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1247 // average number of bytes currently being freed in
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1248 // a collection, but only if it is at least one region
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1249 // full
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1250 //
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1251 // Resize Heap based on desired
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1252 // allocation space, where desired allocation space is
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1253 // a function of survival rate and desired future to size.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1254 //
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1255 // Choose collection set by first picking all older regions
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1256 // which have a survival rate which beats our projected young
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1257 // survival rate. Then fill out the number of needed regions
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1258 // with young regions.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1259
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1260 class G1CollectorPolicy_BestRegionsFirst: public G1CollectorPolicy {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1261 CollectionSetChooser* _collectionSetChooser;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1262 // If the estimated is less then desirable, resize if possible.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1263 void expand_if_possible(size_t numRegions);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1264
1707
0ce1569c90e5 6963209: G1: remove the concept of abandoned pauses
tonyp
parents: 1705
diff changeset
1265 virtual void choose_collection_set(double target_pause_time_ms);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1266 virtual void record_collection_pause_start(double start_time_sec,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1267 size_t start_used);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1268 virtual void record_concurrent_mark_cleanup_end(size_t freed_bytes,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1269 size_t max_live_bytes);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1270 virtual void record_full_collection_end();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1271
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1272 public:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1273 G1CollectorPolicy_BestRegionsFirst() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1274 _collectionSetChooser = new CollectionSetChooser();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1275 }
1707
0ce1569c90e5 6963209: G1: remove the concept of abandoned pauses
tonyp
parents: 1705
diff changeset
1276 void record_collection_pause_end();
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1277 // This is not needed any more, after the CSet choosing code was
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1278 // changed to use the pause prediction work. But let's leave the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1279 // hook in just in case.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1280 void note_change_in_marked_bytes(HeapRegion* r) { }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1281 #ifndef PRODUCT
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1282 bool assertMarkedBytesDataOK();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1283 #endif
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1284 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1285
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1286 // This should move to some place more general...
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1287
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1288 // If we have "n" measurements, and we've kept track of their "sum" and the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1289 // "sum_of_squares" of the measurements, this returns the variance of the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1290 // sequence.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1291 inline double variance(int n, double sum_of_squares, double sum) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1292 double n_d = (double)n;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1293 double avg = sum/n_d;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1294 return (sum_of_squares - 2.0 * avg * sum + n_d * avg * avg) / n_d;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1295 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1296
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1297 // Local Variables: ***
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1298 // c-indentation-style: gnu ***
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1299 // End: ***
1972
f95d63e2154a 6989984: Use standard include model for Hospot
stefank
parents: 1707
diff changeset
1300
f95d63e2154a 6989984: Use standard include model for Hospot
stefank
parents: 1707
diff changeset
1301 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1COLLECTORPOLICY_HPP