annotate src/share/vm/gc_implementation/g1/g1CollectorPolicy.hpp @ 941:8b46c4d82093

4957990: Perm heap bloat in JVM Summary: Treat ProfileData in MDO's as a source of weak, not strong, roots. Fixes the bug for stop-world collection -- the case of concurrent collection will be fixed separately. Reviewed-by: jcoomes, jmasa, kvn, never
author ysr
date Wed, 02 Sep 2009 00:04:29 -0700
parents e1fdf4fd34dc
children 2c79770d1f6e
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1 /*
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2 * Copyright 2001-2009 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 // A G1CollectorPolicy makes policy decisions that determine the
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26 // characteristics of the collector. Examples include:
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27 // * choice of collection set.
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28 // * when to collect.
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29
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30 class HeapRegion;
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31 class CollectionSetChooser;
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32
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33 // Yes, this is a bit unpleasant... but it saves replicating the same thing
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34 // over and over again and introducing subtle problems through small typos and
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35 // cutting and pasting mistakes. The macros below introduces a number
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36 // sequnce into the following two classes and the methods that access it.
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37
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38 #define define_num_seq(name) \
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39 private: \
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40 NumberSeq _all_##name##_times_ms; \
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41 public: \
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42 void record_##name##_time_ms(double ms) { \
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43 _all_##name##_times_ms.add(ms); \
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44 } \
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45 NumberSeq* get_##name##_seq() { \
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46 return &_all_##name##_times_ms; \
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47 }
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48
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49 class MainBodySummary;
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50
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51 class PauseSummary: public CHeapObj {
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52 define_num_seq(total)
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53 define_num_seq(other)
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54
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55 public:
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56 virtual MainBodySummary* main_body_summary() { return NULL; }
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57 };
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58
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59 class MainBodySummary: public CHeapObj {
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60 define_num_seq(satb_drain) // optional
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61 define_num_seq(parallel) // parallel only
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62 define_num_seq(ext_root_scan)
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63 define_num_seq(mark_stack_scan)
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64 define_num_seq(scan_only)
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65 define_num_seq(update_rs)
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66 define_num_seq(scan_rs)
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67 define_num_seq(scan_new_refs) // Only for temp use; added to
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68 // in parallel case.
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69 define_num_seq(obj_copy)
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70 define_num_seq(termination) // parallel only
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71 define_num_seq(parallel_other) // parallel only
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72 define_num_seq(mark_closure)
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73 define_num_seq(clear_ct) // parallel only
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74 };
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75
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76 class Summary: public PauseSummary,
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77 public MainBodySummary {
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78 public:
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79 virtual MainBodySummary* main_body_summary() { return this; }
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80 };
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81
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82 class AbandonedSummary: public PauseSummary {
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83 };
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84
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85 class G1CollectorPolicy: public CollectorPolicy {
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86 protected:
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87 // The number of pauses during the execution.
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88 long _n_pauses;
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89
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90 // either equal to the number of parallel threads, if ParallelGCThreads
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91 // has been set, or 1 otherwise
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92 int _parallel_gc_threads;
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93
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94 enum SomePrivateConstants {
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95 NumPrevPausesForHeuristics = 10,
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96 NumPrevGCsForHeuristics = 10,
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97 NumAPIs = HeapRegion::MaxAge
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98 };
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99
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100 G1MMUTracker* _mmu_tracker;
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101
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102 void initialize_flags();
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103
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104 void initialize_all() {
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105 initialize_flags();
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106 initialize_size_info();
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107 initialize_perm_generation(PermGen::MarkSweepCompact);
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108 }
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109
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110 virtual size_t default_init_heap_size() {
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111 // Pick some reasonable default.
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112 return 8*M;
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113 }
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114
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115 double _cur_collection_start_sec;
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116 size_t _cur_collection_pause_used_at_start_bytes;
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117 size_t _cur_collection_pause_used_regions_at_start;
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118 size_t _prev_collection_pause_used_at_end_bytes;
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119 double _cur_collection_par_time_ms;
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120 double _cur_satb_drain_time_ms;
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121 double _cur_clear_ct_time_ms;
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122 bool _satb_drain_time_set;
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123
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124 #ifndef PRODUCT
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125 // Card Table Count Cache stats
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126 double _min_clear_cc_time_ms; // min
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127 double _max_clear_cc_time_ms; // max
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128 double _cur_clear_cc_time_ms; // clearing time during current pause
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129 double _cum_clear_cc_time_ms; // cummulative clearing time
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130 jlong _num_cc_clears; // number of times the card count cache has been cleared
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131 #endif
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132
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133 double _cur_CH_strong_roots_end_sec;
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134 double _cur_CH_strong_roots_dur_ms;
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135 double _cur_G1_strong_roots_end_sec;
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136 double _cur_G1_strong_roots_dur_ms;
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137
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138 // Statistics for recent GC pauses. See below for how indexed.
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139 TruncatedSeq* _recent_CH_strong_roots_times_ms;
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140 TruncatedSeq* _recent_G1_strong_roots_times_ms;
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141 TruncatedSeq* _recent_evac_times_ms;
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142 // These exclude marking times.
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143 TruncatedSeq* _recent_pause_times_ms;
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144 TruncatedSeq* _recent_gc_times_ms;
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145
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146 TruncatedSeq* _recent_CS_bytes_used_before;
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147 TruncatedSeq* _recent_CS_bytes_surviving;
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148
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149 TruncatedSeq* _recent_rs_sizes;
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150
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151 TruncatedSeq* _concurrent_mark_init_times_ms;
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152 TruncatedSeq* _concurrent_mark_remark_times_ms;
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153 TruncatedSeq* _concurrent_mark_cleanup_times_ms;
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154
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155 Summary* _summary;
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156 AbandonedSummary* _abandoned_summary;
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157
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158 NumberSeq* _all_pause_times_ms;
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159 NumberSeq* _all_full_gc_times_ms;
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160 double _stop_world_start;
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161 NumberSeq* _all_stop_world_times_ms;
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162 NumberSeq* _all_yield_times_ms;
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163
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164 size_t _region_num_young;
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165 size_t _region_num_tenured;
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166 size_t _prev_region_num_young;
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167 size_t _prev_region_num_tenured;
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168
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169 NumberSeq* _all_mod_union_times_ms;
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170
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171 int _aux_num;
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172 NumberSeq* _all_aux_times_ms;
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173 double* _cur_aux_start_times_ms;
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174 double* _cur_aux_times_ms;
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175 bool* _cur_aux_times_set;
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176
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177 double* _par_last_ext_root_scan_times_ms;
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178 double* _par_last_mark_stack_scan_times_ms;
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179 double* _par_last_scan_only_times_ms;
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180 double* _par_last_scan_only_regions_scanned;
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181 double* _par_last_update_rs_start_times_ms;
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182 double* _par_last_update_rs_times_ms;
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183 double* _par_last_update_rs_processed_buffers;
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184 double* _par_last_scan_rs_start_times_ms;
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185 double* _par_last_scan_rs_times_ms;
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186 double* _par_last_scan_new_refs_times_ms;
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187 double* _par_last_obj_copy_times_ms;
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188 double* _par_last_termination_times_ms;
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189
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190 // indicates that we are in young GC mode
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191 bool _in_young_gc_mode;
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192
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193 // indicates whether we are in full young or partially young GC mode
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194 bool _full_young_gcs;
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195
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196 // if true, then it tries to dynamically adjust the length of the
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197 // young list
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198 bool _adaptive_young_list_length;
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199 size_t _young_list_min_length;
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200 size_t _young_list_target_length;
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201 size_t _young_list_so_prefix_length;
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202 size_t _young_list_fixed_length;
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203
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204 size_t _young_cset_length;
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205 bool _last_young_gc_full;
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206
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207 double _target_pause_time_ms;
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208
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209 unsigned _full_young_pause_num;
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210 unsigned _partial_young_pause_num;
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211
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212 bool _during_marking;
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213 bool _in_marking_window;
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214 bool _in_marking_window_im;
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215
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216 SurvRateGroup* _short_lived_surv_rate_group;
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217 SurvRateGroup* _survivor_surv_rate_group;
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218 // add here any more surv rate groups
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219
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220 bool during_marking() {
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221 return _during_marking;
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222 }
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223
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224 // <NEW PREDICTION>
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225
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226 private:
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227 enum PredictionConstants {
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228 TruncatedSeqLength = 10
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229 };
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230
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231 TruncatedSeq* _alloc_rate_ms_seq;
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232 double _prev_collection_pause_end_ms;
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233
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234 TruncatedSeq* _pending_card_diff_seq;
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235 TruncatedSeq* _rs_length_diff_seq;
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236 TruncatedSeq* _cost_per_card_ms_seq;
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237 TruncatedSeq* _cost_per_scan_only_region_ms_seq;
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238 TruncatedSeq* _fully_young_cards_per_entry_ratio_seq;
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239 TruncatedSeq* _partially_young_cards_per_entry_ratio_seq;
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240 TruncatedSeq* _cost_per_entry_ms_seq;
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241 TruncatedSeq* _partially_young_cost_per_entry_ms_seq;
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242 TruncatedSeq* _cost_per_byte_ms_seq;
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243 TruncatedSeq* _constant_other_time_ms_seq;
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244 TruncatedSeq* _young_other_cost_per_region_ms_seq;
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245 TruncatedSeq* _non_young_other_cost_per_region_ms_seq;
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246
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247 TruncatedSeq* _pending_cards_seq;
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248 TruncatedSeq* _scanned_cards_seq;
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249 TruncatedSeq* _rs_lengths_seq;
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250
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251 TruncatedSeq* _cost_per_byte_ms_during_cm_seq;
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252 TruncatedSeq* _cost_per_scan_only_region_ms_during_cm_seq;
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253
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254 TruncatedSeq* _young_gc_eff_seq;
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255
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256 TruncatedSeq* _max_conc_overhead_seq;
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257
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258 size_t _recorded_young_regions;
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259 size_t _recorded_scan_only_regions;
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260 size_t _recorded_non_young_regions;
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261 size_t _recorded_region_num;
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262
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263 size_t _free_regions_at_end_of_collection;
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264 size_t _scan_only_regions_at_end_of_collection;
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265
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266 size_t _recorded_rs_lengths;
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267 size_t _max_rs_lengths;
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268
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269 size_t _recorded_marked_bytes;
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270 size_t _recorded_young_bytes;
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271
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272 size_t _predicted_pending_cards;
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273 size_t _predicted_cards_scanned;
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274 size_t _predicted_rs_lengths;
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275 size_t _predicted_bytes_to_copy;
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276
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277 double _predicted_survival_ratio;
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278 double _predicted_rs_update_time_ms;
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279 double _predicted_rs_scan_time_ms;
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280 double _predicted_scan_only_scan_time_ms;
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281 double _predicted_object_copy_time_ms;
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282 double _predicted_constant_other_time_ms;
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283 double _predicted_young_other_time_ms;
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284 double _predicted_non_young_other_time_ms;
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285 double _predicted_pause_time_ms;
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286
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287 double _vtime_diff_ms;
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288
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289 double _recorded_young_free_cset_time_ms;
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290 double _recorded_non_young_free_cset_time_ms;
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291
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292 double _sigma;
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293 double _expensive_region_limit_ms;
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294
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295 size_t _rs_lengths_prediction;
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296
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297 size_t _known_garbage_bytes;
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298 double _known_garbage_ratio;
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299
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300 double sigma() {
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301 return _sigma;
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302 }
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303
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304 // A function that prevents us putting too much stock in small sample
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305 // sets. Returns a number between 2.0 and 1.0, depending on the number
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306 // of samples. 5 or more samples yields one; fewer scales linearly from
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307 // 2.0 at 1 sample to 1.0 at 5.
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308 double confidence_factor(int samples) {
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309 if (samples > 4) return 1.0;
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310 else return 1.0 + sigma() * ((double)(5 - samples))/2.0;
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311 }
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312
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313 double get_new_neg_prediction(TruncatedSeq* seq) {
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314 return seq->davg() - sigma() * seq->dsd();
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315 }
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316
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317 #ifndef PRODUCT
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318 bool verify_young_ages(HeapRegion* head, SurvRateGroup *surv_rate_group);
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319 #endif // PRODUCT
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320
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321 protected:
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322 double _pause_time_target_ms;
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323 double _recorded_young_cset_choice_time_ms;
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324 double _recorded_non_young_cset_choice_time_ms;
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325 bool _within_target;
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326 size_t _pending_cards;
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327 size_t _max_pending_cards;
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328
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329 public:
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330
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331 void set_region_short_lived(HeapRegion* hr) {
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332 hr->install_surv_rate_group(_short_lived_surv_rate_group);
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333 }
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334
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335 void set_region_survivors(HeapRegion* hr) {
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336 hr->install_surv_rate_group(_survivor_surv_rate_group);
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337 }
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338
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339 #ifndef PRODUCT
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340 bool verify_young_ages();
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341 #endif // PRODUCT
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342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
diff changeset
343 void tag_scan_only(size_t short_lived_scan_only_length);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
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344
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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345 double get_new_prediction(TruncatedSeq* seq) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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346 return MAX2(seq->davg() + sigma() * seq->dsd(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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347 seq->davg() * confidence_factor(seq->num()));
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
348 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
diff changeset
349
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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diff changeset
350 size_t young_cset_length() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
351 return _young_cset_length;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
352 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
diff changeset
353
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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diff changeset
354 void record_max_rs_lengths(size_t rs_lengths) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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355 _max_rs_lengths = rs_lengths;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
356 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
357
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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diff changeset
358 size_t predict_pending_card_diff() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
359 double prediction = get_new_neg_prediction(_pending_card_diff_seq);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
360 if (prediction < 0.00001)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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diff changeset
361 return 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
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362 else
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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diff changeset
363 return (size_t) prediction;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
364 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
365
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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diff changeset
366 size_t predict_pending_cards() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
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367 size_t max_pending_card_num = _g1->max_pending_card_num();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
368 size_t diff = predict_pending_card_diff();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
369 size_t prediction;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
370 if (diff > max_pending_card_num)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
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diff changeset
371 prediction = max_pending_card_num;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
372 else
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
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373 prediction = max_pending_card_num - diff;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
diff changeset
374
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
375 return prediction;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
376 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
377
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
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diff changeset
378 size_t predict_rs_length_diff() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
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379 return (size_t) get_new_prediction(_rs_length_diff_seq);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
380 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
381
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
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diff changeset
382 double predict_alloc_rate_ms() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
383 return get_new_prediction(_alloc_rate_ms_seq);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
384 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
385
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
386 double predict_cost_per_card_ms() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
387 return get_new_prediction(_cost_per_card_ms_seq);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
388 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
389
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
390 double predict_rs_update_time_ms(size_t pending_cards) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
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391 return (double) pending_cards * predict_cost_per_card_ms();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
392 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
393
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
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diff changeset
394 double predict_fully_young_cards_per_entry_ratio() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
395 return get_new_prediction(_fully_young_cards_per_entry_ratio_seq);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
396 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
397
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
398 double predict_partially_young_cards_per_entry_ratio() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
399 if (_partially_young_cards_per_entry_ratio_seq->num() < 2)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
400 return predict_fully_young_cards_per_entry_ratio();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
401 else
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
402 return get_new_prediction(_partially_young_cards_per_entry_ratio_seq);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
403 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
404
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
405 size_t predict_young_card_num(size_t rs_length) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
406 return (size_t) ((double) rs_length *
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
407 predict_fully_young_cards_per_entry_ratio());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
408 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
409
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
410 size_t predict_non_young_card_num(size_t rs_length) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
411 return (size_t) ((double) rs_length *
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
412 predict_partially_young_cards_per_entry_ratio());
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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
415 double predict_rs_scan_time_ms(size_t card_num) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
416 if (full_young_gcs())
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
417 return (double) card_num * get_new_prediction(_cost_per_entry_ms_seq);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
418 else
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
419 return predict_partially_young_rs_scan_time_ms(card_num);
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
parents:
diff changeset
422 double predict_partially_young_rs_scan_time_ms(size_t card_num) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
423 if (_partially_young_cost_per_entry_ms_seq->num() < 3)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
424 return (double) card_num * get_new_prediction(_cost_per_entry_ms_seq);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
425 else
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
426 return (double) card_num *
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
427 get_new_prediction(_partially_young_cost_per_entry_ms_seq);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
428 }
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 double predict_scan_only_time_ms_during_cm(size_t scan_only_region_num) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
431 if (_cost_per_scan_only_region_ms_during_cm_seq->num() < 3)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
432 return 1.5 * (double) scan_only_region_num *
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
433 get_new_prediction(_cost_per_scan_only_region_ms_seq);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
434 else
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
435 return (double) scan_only_region_num *
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
436 get_new_prediction(_cost_per_scan_only_region_ms_during_cm_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_scan_only_time_ms(size_t scan_only_region_num) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
440 if (_in_marking_window_im)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
441 return predict_scan_only_time_ms_during_cm(scan_only_region_num);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
442 else
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
443 return (double) scan_only_region_num *
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
444 get_new_prediction(_cost_per_scan_only_region_ms_seq);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
445 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
446
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
447 double predict_object_copy_time_ms_during_cm(size_t bytes_to_copy) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
448 if (_cost_per_byte_ms_during_cm_seq->num() < 3)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
449 return 1.1 * (double) bytes_to_copy *
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
450 get_new_prediction(_cost_per_byte_ms_seq);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
451 else
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
452 return (double) bytes_to_copy *
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
453 get_new_prediction(_cost_per_byte_ms_during_cm_seq);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
454 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
455
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
456 double predict_object_copy_time_ms(size_t bytes_to_copy) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
457 if (_in_marking_window && !_in_marking_window_im)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
458 return predict_object_copy_time_ms_during_cm(bytes_to_copy);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
459 else
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
460 return (double) bytes_to_copy *
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
461 get_new_prediction(_cost_per_byte_ms_seq);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
462 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
463
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
464 double predict_constant_other_time_ms() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
465 return get_new_prediction(_constant_other_time_ms_seq);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
466 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
467
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
468 double predict_young_other_time_ms(size_t young_num) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
469 return
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
470 (double) young_num *
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
471 get_new_prediction(_young_other_cost_per_region_ms_seq);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
472 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
473
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
474 double predict_non_young_other_time_ms(size_t non_young_num) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
475 return
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
476 (double) non_young_num *
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
477 get_new_prediction(_non_young_other_cost_per_region_ms_seq);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
478 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
479
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
480 void check_if_region_is_too_expensive(double predicted_time_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
481
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
482 double predict_young_collection_elapsed_time_ms(size_t adjustment);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
483 double predict_base_elapsed_time_ms(size_t pending_cards);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
484 double predict_base_elapsed_time_ms(size_t pending_cards,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
485 size_t scanned_cards);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
486 size_t predict_bytes_to_copy(HeapRegion* hr);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
487 double predict_region_elapsed_time_ms(HeapRegion* hr, bool young);
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 // for use by: calculate_optimal_so_length(length)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
490 void predict_gc_eff(size_t young_region_num,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
491 size_t so_length,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
492 double base_time_ms,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
493 double *gc_eff,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
494 double *pause_time_ms);
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 // for use by: calculate_young_list_target_config(rs_length)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
497 bool predict_gc_eff(size_t young_region_num,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
498 size_t so_length,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
499 double base_time_with_so_ms,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
500 size_t init_free_regions,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
501 double target_pause_time_ms,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
502 double* gc_eff);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
503
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
504 void start_recording_regions();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
505 void record_cset_region(HeapRegion* hr, bool young);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
506 void record_scan_only_regions(size_t scan_only_length);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
507 void end_recording_regions();
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 record_vtime_diff_ms(double vtime_diff_ms) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
510 _vtime_diff_ms = vtime_diff_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
511 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
512
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
513 void record_young_free_cset_time_ms(double time_ms) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
514 _recorded_young_free_cset_time_ms = time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
515 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
516
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
517 void record_non_young_free_cset_time_ms(double time_ms) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
518 _recorded_non_young_free_cset_time_ms = time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
519 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
520
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
521 double predict_young_gc_eff() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
522 return get_new_neg_prediction(_young_gc_eff_seq);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
523 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
524
545
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
525 double predict_survivor_regions_evac_time();
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
526
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
diff changeset
527 // </NEW PREDICTION>
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
528
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
529 public:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
530 void cset_regions_freed() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
531 bool propagate = _last_young_gc_full && !_in_marking_window;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
532 _short_lived_surv_rate_group->all_surviving_words_recorded(propagate);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
533 _survivor_surv_rate_group->all_surviving_words_recorded(propagate);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
534 // also call it on any more surv rate groups
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
535 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
536
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
537 void set_known_garbage_bytes(size_t known_garbage_bytes) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
538 _known_garbage_bytes = known_garbage_bytes;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
539 size_t heap_bytes = _g1->capacity();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
540 _known_garbage_ratio = (double) _known_garbage_bytes / (double) heap_bytes;
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 void decrease_known_garbage_bytes(size_t known_garbage_bytes) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
544 guarantee( _known_garbage_bytes >= known_garbage_bytes, "invariant" );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
545
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
546 _known_garbage_bytes -= known_garbage_bytes;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
547 size_t heap_bytes = _g1->capacity();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
548 _known_garbage_ratio = (double) _known_garbage_bytes / (double) heap_bytes;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
549 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
550
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
551 G1MMUTracker* mmu_tracker() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
552 return _mmu_tracker;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
553 }
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 double predict_init_time_ms() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
556 return get_new_prediction(_concurrent_mark_init_times_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
557 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
558
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
559 double predict_remark_time_ms() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
560 return get_new_prediction(_concurrent_mark_remark_times_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
561 }
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 double predict_cleanup_time_ms() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
564 return get_new_prediction(_concurrent_mark_cleanup_times_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
565 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
566
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
567 // 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
568 // "yg_age".
545
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
569 double predict_yg_surv_rate(int age, SurvRateGroup* surv_rate_group) {
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
570 TruncatedSeq* seq = surv_rate_group->get_seq(age);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
571 if (seq->num() == 0)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
572 gclog_or_tty->print("BARF! age is %d", age);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
573 guarantee( seq->num() > 0, "invariant" );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
574 double pred = get_new_prediction(seq);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
575 if (pred > 1.0)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
576 pred = 1.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
577 return pred;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
578 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
579
545
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
580 double predict_yg_surv_rate(int age) {
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
581 return predict_yg_surv_rate(age, _short_lived_surv_rate_group);
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
582 }
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
583
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
584 double accum_yg_surv_rate_pred(int age) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
585 return _short_lived_surv_rate_group->accum_surv_rate_pred(age);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
586 }
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 protected:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
589 void print_stats (int level, const char* str, double value);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
590 void print_stats (int level, const char* str, int value);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
591 void print_par_stats (int level, const char* str, double* data) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
592 print_par_stats(level, str, data, true);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
593 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
594 void print_par_stats (int level, const char* str, double* data, bool summary);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
595 void print_par_buffers (int level, const char* str, double* data, bool summary);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
596
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
597 void check_other_times(int level,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
598 NumberSeq* other_times_ms,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
599 NumberSeq* calc_other_times_ms) const;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
600
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
601 void print_summary (PauseSummary* stats) const;
677
96b229c54d1e 6543938: G1: remove the concept of popularity
apetrusenko
parents: 628
diff changeset
602 void print_abandoned_summary(PauseSummary* summary) const;
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
603
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
604 void print_summary (int level, const char* str, NumberSeq* seq) const;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
605 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
606
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
607 double avg_value (double* data);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
608 double max_value (double* data);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
609 double sum_of_values (double* data);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
610 double max_sum (double* data1, double* data2);
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 int _last_satb_drain_processed_buffers;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
613 int _last_update_rs_processed_buffers;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
614 double _last_pause_time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
615
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
616 size_t _bytes_in_to_space_before_gc;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
617 size_t _bytes_in_to_space_after_gc;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
618 size_t bytes_in_to_space_during_gc() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
619 return
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
620 _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
621 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
622 size_t _bytes_in_collection_set_before_gc;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
623 // Used to count used bytes in CS.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
624 friend class CountCSClosure;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
625
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
626 // Statistics kept per GC stoppage, pause or full.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
627 TruncatedSeq* _recent_prev_end_times_for_all_gcs_sec;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
628
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
629 // We track markings.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
630 int _num_markings;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
631 double _mark_thread_startup_sec; // Time at startup of marking thread
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
632
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
633 // 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
634 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
635
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
636 // 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
637 // current collection set.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
638 HeapRegion* _collection_set;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
639 size_t _collection_set_size;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
640 size_t _collection_set_bytes_used_before;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
641
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
642 // Info about marking.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
643 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
644
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
645 // 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
646 size_t _n_pauses_at_mark_end;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
647
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
648 // Stash a pointer to the g1 heap.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
649 G1CollectedHeap* _g1;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
650
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
651 // 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
652 double recent_avg_time_for_pauses_ms();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
653
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
654 // The average time in ms for processing CollectedHeap strong roots, per
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
655 // collection pause, averaged over recent pauses.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
656 double recent_avg_time_for_CH_strong_ms();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
657
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
658 // 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
659 // pause, averaged over recent pauses.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
660 double recent_avg_time_for_G1_strong_ms();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
661
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
662 // The average time in ms for "evacuating followers", per pause, averaged
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
663 // over recent pauses.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
664 double recent_avg_time_for_evac_ms();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
665
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
666 // The number of "recent" GCs recorded in the number sequences
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
667 int number_of_recent_gcs();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
668
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
669 // The average survival ratio, computed by the total number of bytes
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
670 // suriviving / total number of bytes before collection over the last
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
671 // several recent pauses.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
672 double recent_avg_survival_fraction();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
673 // 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
674 // pauses, returns 1.0.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
675 double last_survival_fraction();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
676
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
677 // Returns a "conservative" estimate of the recent survival rate, i.e.,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
678 // one that may be higher than "recent_avg_survival_fraction".
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
679 // This is conservative in several ways:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
680 // 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
681 // variance, and err on the side of caution.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
682 // 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
683 // 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
684 // higher-than average ("avg") survival rate, it returns that rate.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
685 // "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
686 double conservative_avg_survival_fraction_work(double avg,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
687 double latest);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
688
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
689 // 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
690 // surviving and the total number of bytes before collection, resp.,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
691 // over the last evereal recent pauses
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
692 // 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
693 // If there have been no pauses, returns 1.0.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
694 double last_survival_fraction_work(TruncatedSeq* surviving,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
695 TruncatedSeq* before);
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 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
698 // surviving and the total number of bytes before collection, resp.,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
699 // over the last several recent pauses
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
700 // Returns the average survival ration over the last several recent pauses
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
701 // If there have been no pauses, return 1.0
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
702 double recent_avg_survival_fraction_work(TruncatedSeq* surviving,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
703 TruncatedSeq* before);
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 double conservative_avg_survival_fraction() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
706 double avg = recent_avg_survival_fraction();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
707 double latest = last_survival_fraction();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
708 return conservative_avg_survival_fraction_work(avg, latest);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
709 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
710
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
711 // 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
712 double _recent_avg_pause_time_ratio;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
713
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
714 double recent_avg_pause_time_ratio() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
715 return _recent_avg_pause_time_ratio;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
716 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
717
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
718 // Number of pauses between concurrent marking.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
719 size_t _pauses_btwn_concurrent_mark;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
720
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
721 size_t _n_marks_since_last_pause;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
722
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
723 // True iff CM has been initiated.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
724 bool _conc_mark_initiated;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
725
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
726 // True iff CM should be initiated
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
727 bool _should_initiate_conc_mark;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
728 bool _should_revert_to_full_young_gcs;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
729 bool _last_full_young_gc;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
730
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
731 // This set of variables tracks the collector efficiency, in order to
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
732 // determine whether we should initiate a new marking.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
733 double _cur_mark_stop_world_time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
734 double _mark_init_start_sec;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
735 double _mark_remark_start_sec;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
736 double _mark_cleanup_start_sec;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
737 double _mark_closure_time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
738
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
739 void calculate_young_list_min_length();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
740 void calculate_young_list_target_config();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
741 void calculate_young_list_target_config(size_t rs_lengths);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
742 size_t calculate_optimal_so_length(size_t young_list_length);
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 public:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
745
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
746 G1CollectorPolicy();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
747
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
748 virtual G1CollectorPolicy* as_g1_policy() { return this; }
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 virtual CollectorPolicy::Name kind() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
751 return CollectorPolicy::G1CollectorPolicyKind;
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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
754 void check_prediction_validity();
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 size_t bytes_in_collection_set() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
757 return _bytes_in_collection_set_before_gc;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
758 }
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 bytes_in_to_space() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
761 return bytes_in_to_space_during_gc();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
762 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
763
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
764 unsigned calc_gc_alloc_time_stamp() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
765 return _all_pause_times_ms->num() + 1;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
766 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
767
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
768 protected:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
769
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
770 // Count the number of bytes used in the CS.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
771 void count_CS_bytes_used();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
772
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
773 // Together these do the base cleanup-recording work. Subclasses might
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
774 // want to put something between them.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
775 void record_concurrent_mark_cleanup_end_work1(size_t freed_bytes,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
776 size_t max_live_bytes);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
777 void record_concurrent_mark_cleanup_end_work2();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
778
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
779 public:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
780
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
781 virtual void init();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
782
545
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
783 // Create jstat counters for the policy.
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
784 virtual void initialize_gc_policy_counters();
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
785
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
786 virtual HeapWord* mem_allocate_work(size_t size,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
787 bool is_tlab,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
788 bool* gc_overhead_limit_was_exceeded);
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 method controls how a collector handles one or more
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
791 // of its generations being fully allocated.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
792 virtual HeapWord* satisfy_failed_allocation(size_t size,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
793 bool is_tlab);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
794
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
795 BarrierSet::Name barrier_set_name() { return BarrierSet::G1SATBCTLogging; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
796
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
797 GenRemSet::Name rem_set_name() { return GenRemSet::CardTable; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
798
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
799 // The number of collection pauses so far.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
800 long n_pauses() const { return _n_pauses; }
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 // 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
803 // 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
804 // This may involve changing the desired size of a collection set.
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 void record_stop_world_start();
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 void record_collection_pause_start(double start_time_sec,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
809 size_t start_used);
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 // Must currently be called while the world is stopped.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
812 virtual void record_concurrent_mark_init_start();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
813 virtual void record_concurrent_mark_init_end();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
814 void record_concurrent_mark_init_end_pre(double
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
815 mark_init_elapsed_time_ms);
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 void record_mark_closure_time(double mark_closure_time_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
818
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
819 virtual void record_concurrent_mark_remark_start();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
820 virtual void record_concurrent_mark_remark_end();
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 virtual void record_concurrent_mark_cleanup_start();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
823 virtual void record_concurrent_mark_cleanup_end(size_t freed_bytes,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
824 size_t max_live_bytes);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
825 virtual void record_concurrent_mark_cleanup_completed();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
826
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
827 virtual void record_concurrent_pause();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
828 virtual void record_concurrent_pause_end();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
829
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
830 virtual void record_collection_pause_end_CH_strong_roots();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
831 virtual void record_collection_pause_end_G1_strong_roots();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
832
677
96b229c54d1e 6543938: G1: remove the concept of popularity
apetrusenko
parents: 628
diff changeset
833 virtual void record_collection_pause_end(bool abandoned);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
834
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
835 // Record the fact that a full collection occurred.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
836 virtual void record_full_collection_start();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
837 virtual void record_full_collection_end();
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 void record_ext_root_scan_time(int worker_i, double ms) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
840 _par_last_ext_root_scan_times_ms[worker_i] = ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
841 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
842
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
843 void record_mark_stack_scan_time(int worker_i, double ms) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
844 _par_last_mark_stack_scan_times_ms[worker_i] = ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
845 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
846
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
847 void record_scan_only_time(int worker_i, double ms, int n) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
848 _par_last_scan_only_times_ms[worker_i] = ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
849 _par_last_scan_only_regions_scanned[worker_i] = (double) n;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
850 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
851
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
852 void record_satb_drain_time(double ms) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
853 _cur_satb_drain_time_ms = ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
854 _satb_drain_time_set = true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
855 }
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 void record_satb_drain_processed_buffers (int processed_buffers) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
858 _last_satb_drain_processed_buffers = processed_buffers;
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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
861 void record_mod_union_time(double ms) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
862 _all_mod_union_times_ms->add(ms);
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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
865 void record_update_rs_start_time(int thread, double ms) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
866 _par_last_update_rs_start_times_ms[thread] = ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
867 }
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 void record_update_rs_time(int thread, double ms) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
870 _par_last_update_rs_times_ms[thread] = ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
871 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
872
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
873 void record_update_rs_processed_buffers (int thread,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
874 double processed_buffers) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
875 _par_last_update_rs_processed_buffers[thread] = processed_buffers;
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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
878 void record_scan_rs_start_time(int thread, double ms) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
879 _par_last_scan_rs_start_times_ms[thread] = ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
880 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
881
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
882 void record_scan_rs_time(int thread, double ms) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
883 _par_last_scan_rs_times_ms[thread] = ms;
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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
886 void record_scan_new_refs_time(int thread, double ms) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
887 _par_last_scan_new_refs_times_ms[thread] = ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
888 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
889
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
890 double get_scan_new_refs_time(int thread) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
891 return _par_last_scan_new_refs_times_ms[thread];
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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
894 void reset_obj_copy_time(int thread) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
895 _par_last_obj_copy_times_ms[thread] = 0.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
896 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
897
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
898 void reset_obj_copy_time() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
899 reset_obj_copy_time(0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
900 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
901
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
902 void record_obj_copy_time(int thread, double ms) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
903 _par_last_obj_copy_times_ms[thread] += ms;
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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
906 void record_obj_copy_time(double ms) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
907 record_obj_copy_time(0, ms);
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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
910 void record_termination_time(int thread, double ms) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
911 _par_last_termination_times_ms[thread] = ms;
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_termination_time(double ms) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
915 record_termination_time(0, ms);
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
595
3698e8f47799 6804746: G1: guarantee(variance() > -1.0,"variance should be >= 0") (due to evacuation failure)
tonyp
parents: 549
diff changeset
918 void record_pause_time_ms(double ms) {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
919 _last_pause_time_ms = 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_clear_ct_time(double ms) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
923 _cur_clear_ct_time_ms = 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_par_time(double ms) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
927 _cur_collection_par_time_ms = ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
928 }
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 void record_aux_start_time(int i) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
931 guarantee(i < _aux_num, "should be within range");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
932 _cur_aux_start_times_ms[i] = os::elapsedTime() * 1000.0;
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 record_aux_end_time(int i) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
936 guarantee(i < _aux_num, "should be within range");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
937 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
938 _cur_aux_times_set[i] = true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
939 _cur_aux_times_ms[i] += ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
940 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
941
890
6cb8e9df7174 6819077: G1: first GC thread coming late into the GC.
johnc
parents: 838
diff changeset
942 #ifndef PRODUCT
6cb8e9df7174 6819077: G1: first GC thread coming late into the GC.
johnc
parents: 838
diff changeset
943 void record_cc_clear_time(double ms) {
6cb8e9df7174 6819077: G1: first GC thread coming late into the GC.
johnc
parents: 838
diff changeset
944 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
945 _min_clear_cc_time_ms = ms;
6cb8e9df7174 6819077: G1: first GC thread coming late into the GC.
johnc
parents: 838
diff changeset
946 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
947 _max_clear_cc_time_ms = ms;
6cb8e9df7174 6819077: G1: first GC thread coming late into the GC.
johnc
parents: 838
diff changeset
948 _cur_clear_cc_time_ms = ms;
6cb8e9df7174 6819077: G1: first GC thread coming late into the GC.
johnc
parents: 838
diff changeset
949 _cum_clear_cc_time_ms += ms;
6cb8e9df7174 6819077: G1: first GC thread coming late into the GC.
johnc
parents: 838
diff changeset
950 _num_cc_clears++;
6cb8e9df7174 6819077: G1: first GC thread coming late into the GC.
johnc
parents: 838
diff changeset
951 }
6cb8e9df7174 6819077: G1: first GC thread coming late into the GC.
johnc
parents: 838
diff changeset
952 #endif
6cb8e9df7174 6819077: G1: first GC thread coming late into the GC.
johnc
parents: 838
diff changeset
953
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
954 // Record the fact that "bytes" bytes allocated in a region.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
955 void record_before_bytes(size_t bytes);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
956 void record_after_bytes(size_t bytes);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
957
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
958 // Returns "true" if this is a good time to do a collection pause.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
959 // The "word_size" argument, if non-zero, indicates the size of an
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
960 // allocation request that is prompting this query.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
961 virtual bool should_do_collection_pause(size_t word_size) = 0;
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 // Choose a new collection set. Marks the chosen regions as being
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
964 // "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
965 // the collection set are available via access methods.
677
96b229c54d1e 6543938: G1: remove the concept of popularity
apetrusenko
parents: 628
diff changeset
966 virtual void choose_collection_set() = 0;
342
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 clear_collection_set() { _collection_set = NULL; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
969
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
970 // 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
971 // current collection set.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
972 HeapRegion* collection_set() { return _collection_set; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
973
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
974 // The number of elements in the current collection set.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
975 size_t collection_set_size() { return _collection_set_size; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
976
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
977 // Add "hr" to the CS.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
978 void add_to_collection_set(HeapRegion* hr);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
979
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
980 bool should_initiate_conc_mark() { return _should_initiate_conc_mark; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
981 void set_should_initiate_conc_mark() { _should_initiate_conc_mark = true; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
982 void unset_should_initiate_conc_mark(){ _should_initiate_conc_mark = false; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
983
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
984 // If an expansion would be appropriate, because recent GC overhead had
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
985 // exceeded the desired limit, return an amount to expand by.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
986 virtual size_t expansion_amount();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
987
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
988 // note start of mark thread
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
989 void note_start_of_mark_thread();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
990
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
991 // 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
992 // for marking. Also asserts that "r" is eligible for a CS.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
993 virtual void note_change_in_marked_bytes(HeapRegion* r) = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
994
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
995 #ifndef PRODUCT
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
996 // Check any appropriate marked bytes info, asserting false if
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
997 // something's wrong, else returning "true".
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
998 virtual bool assertMarkedBytesDataOK() = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
999 #endif
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 // Print tracing information.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1002 void print_tracing_info() const;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1003
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1004 // Print stats on young survival ratio
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1005 void print_yg_surv_rate_info() const;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1006
545
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
1007 void finished_recalculating_age_indexes(bool is_survivors) {
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
1008 if (is_survivors) {
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
1009 _survivor_surv_rate_group->finished_recalculating_age_indexes();
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
1010 } else {
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
1011 _short_lived_surv_rate_group->finished_recalculating_age_indexes();
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
1012 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1013 // do that for any other surv rate groups
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1014 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1015
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1016 bool should_add_next_region_to_young_list();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1017
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1018 bool in_young_gc_mode() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1019 return _in_young_gc_mode;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1020 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1021 void set_in_young_gc_mode(bool in_young_gc_mode) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1022 _in_young_gc_mode = in_young_gc_mode;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1023 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1024
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1025 bool full_young_gcs() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
diff changeset
1026 return _full_young_gcs;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1027 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1028 void set_full_young_gcs(bool full_young_gcs) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
diff changeset
1029 _full_young_gcs = full_young_gcs;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1030 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1031
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
diff changeset
1032 bool adaptive_young_list_length() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
diff changeset
1033 return _adaptive_young_list_length;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1034 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1035 void set_adaptive_young_list_length(bool adaptive_young_list_length) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1036 _adaptive_young_list_length = adaptive_young_list_length;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1037 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1038
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1039 inline double get_gc_eff_factor() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1040 double ratio = _known_garbage_ratio;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1041
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1042 double square = ratio * ratio;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1043 // square = square * square;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1044 double ret = square * 9.0 + 1.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1045 #if 0
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1046 gclog_or_tty->print_cr("ratio = %1.2lf, ret = %1.2lf", ratio, ret);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
diff changeset
1047 #endif // 0
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1048 guarantee(0.0 <= ret && ret < 10.0, "invariant!");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1049 return ret;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
diff changeset
1050 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
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diff changeset
1051
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1052 //
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1053 // Survivor regions policy.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1054 //
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1055 protected:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1056
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1057 // Current tenuring threshold, set to 0 if the collector reaches the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1058 // maximum amount of suvivors regions.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1059 int _tenuring_threshold;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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diff changeset
1060
545
58054a18d735 6484959: G1: introduce survivor spaces
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diff changeset
1061 // The limit on the number of regions allocated for survivors.
58054a18d735 6484959: G1: introduce survivor spaces
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diff changeset
1062 size_t _max_survivor_regions;
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
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diff changeset
1063
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
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diff changeset
1064 // The amount of survor regions after a collection.
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
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diff changeset
1065 size_t _recorded_survivor_regions;
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
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diff changeset
1066 // List of survivor regions.
58054a18d735 6484959: G1: introduce survivor spaces
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diff changeset
1067 HeapRegion* _recorded_survivor_head;
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
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diff changeset
1068 HeapRegion* _recorded_survivor_tail;
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
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diff changeset
1069
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
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diff changeset
1070 ageTable _survivors_age_table;
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
1071
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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diff changeset
1072 public:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1073
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1074 inline GCAllocPurpose
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1075 evacuation_destination(HeapRegion* src_region, int age, size_t word_sz) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1076 if (age < _tenuring_threshold && src_region->is_young()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1077 return GCAllocForSurvived;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1078 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
diff changeset
1079 return GCAllocForTenured;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
diff changeset
1080 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
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diff changeset
1081 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1082
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1083 inline bool track_object_age(GCAllocPurpose purpose) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1084 return purpose == GCAllocForSurvived;
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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1087 inline GCAllocPurpose alternative_purpose(int purpose) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1088 return GCAllocForTenured;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1089 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1090
545
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
1091 static const size_t REGIONS_UNLIMITED = ~(size_t)0;
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
1092
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
1093 size_t max_regions(int purpose);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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1094
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1095 // The limit on regions for a particular purpose is reached.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1096 void note_alloc_region_limit_reached(int purpose) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1097 if (purpose == GCAllocForSurvived) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1098 _tenuring_threshold = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1099 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1100 }
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 void note_start_adding_survivor_regions() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1103 _survivor_surv_rate_group->start_adding_regions();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1104 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1105
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1106 void note_stop_adding_survivor_regions() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1107 _survivor_surv_rate_group->stop_adding_regions();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
diff changeset
1108 }
545
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
1109
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
1110 void record_survivor_regions(size_t regions,
58054a18d735 6484959: G1: introduce survivor spaces
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parents: 342
diff changeset
1111 HeapRegion* head,
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
1112 HeapRegion* tail) {
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
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diff changeset
1113 _recorded_survivor_regions = regions;
58054a18d735 6484959: G1: introduce survivor spaces
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diff changeset
1114 _recorded_survivor_head = head;
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
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diff changeset
1115 _recorded_survivor_tail = tail;
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
1116 }
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
1117
838
0316eac49d5a 6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents: 794
diff changeset
1118 size_t recorded_survivor_regions() {
0316eac49d5a 6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents: 794
diff changeset
1119 return _recorded_survivor_regions;
0316eac49d5a 6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents: 794
diff changeset
1120 }
0316eac49d5a 6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents: 794
diff changeset
1121
545
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
1122 void record_thread_age_table(ageTable* age_table)
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
1123 {
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
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diff changeset
1124 _survivors_age_table.merge_par(age_table);
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
1125 }
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
1126
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
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diff changeset
1127 // Calculates survivor space parameters.
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 342
diff changeset
1128 void calculate_survivors_policy();
58054a18d735 6484959: G1: introduce survivor spaces
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diff changeset
1129
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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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 // This encapsulates a particular strategy for a g1 Collector.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1133 //
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1134 // Start a concurrent mark when our heap size is n bytes
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1135 // greater then our heap size was at the last concurrent
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1136 // mark. Where n is a function of the CMSTriggerRatio
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1137 // and the MinHeapFreeRatio.
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 // Start a g1 collection pause when we have allocated the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1140 // average number of bytes currently being freed in
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1141 // a collection, but only if it is at least one region
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1142 // full
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1143 //
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1144 // Resize Heap based on desired
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1145 // allocation space, where desired allocation space is
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1146 // a function of survival rate and desired future to size.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1147 //
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1148 // Choose collection set by first picking all older regions
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1149 // which have a survival rate which beats our projected young
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1150 // survival rate. Then fill out the number of needed regions
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1151 // with young regions.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1152
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1153 class G1CollectorPolicy_BestRegionsFirst: public G1CollectorPolicy {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1154 CollectionSetChooser* _collectionSetChooser;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1155 // If the estimated is less then desirable, resize if possible.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1156 void expand_if_possible(size_t numRegions);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
diff changeset
1157
677
96b229c54d1e 6543938: G1: remove the concept of popularity
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1158 virtual void choose_collection_set();
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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1159 virtual void record_collection_pause_start(double start_time_sec,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
diff changeset
1160 size_t start_used);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1161 virtual void record_concurrent_mark_cleanup_end(size_t freed_bytes,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1162 size_t max_live_bytes);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1163 virtual void record_full_collection_end();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1164
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
diff changeset
1165 public:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1166 G1CollectorPolicy_BestRegionsFirst() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1167 _collectionSetChooser = new CollectionSetChooser();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
diff changeset
1168 }
677
96b229c54d1e 6543938: G1: remove the concept of popularity
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diff changeset
1169 void record_collection_pause_end(bool abandoned);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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diff changeset
1170 bool should_do_collection_pause(size_t word_size);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1171 // 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
1172 // 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
1173 // hook in just in case.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1174 void note_change_in_marked_bytes(HeapRegion* r) { }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1175 #ifndef PRODUCT
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1176 bool assertMarkedBytesDataOK();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
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diff changeset
1177 #endif
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1178 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1179
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1180 // This should move to some place more general...
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1181
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1182 // 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
1183 // "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
1184 // sequence.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1185 inline double variance(int n, double sum_of_squares, double sum) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1186 double n_d = (double)n;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1187 double avg = sum/n_d;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1188 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
1189 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
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diff changeset
1190
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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1191 // Local Variables: ***
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
diff changeset
1192 // c-indentation-style: gnu ***
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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1193 // End: ***