annotate src/share/vm/gc_implementation/g1/g1CollectorPolicy.cpp @ 3920:af2ab04e0038

6929868: G1: introduce min / max young gen size bounds Summary: Make G1 handle young gen size command line flags more consistently Reviewed-by: tonyp, jwilhelm
author brutisso
date Thu, 08 Sep 2011 16:29:41 +0200
parents 4f41766176cf
children f1b4e0e0bdad
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1 /*
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2 * Copyright (c) 2001, 2011, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 *
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23 */
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24
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25 #include "precompiled.hpp"
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26 #include "gc_implementation/g1/concurrentG1Refine.hpp"
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27 #include "gc_implementation/g1/concurrentMark.hpp"
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28 #include "gc_implementation/g1/concurrentMarkThread.inline.hpp"
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29 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
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30 #include "gc_implementation/g1/g1CollectorPolicy.hpp"
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31 #include "gc_implementation/g1/g1ErgoVerbose.hpp"
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32 #include "gc_implementation/g1/heapRegionRemSet.hpp"
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33 #include "gc_implementation/shared/gcPolicyCounters.hpp"
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34 #include "runtime/arguments.hpp"
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35 #include "runtime/java.hpp"
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36 #include "runtime/mutexLocker.hpp"
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37 #include "utilities/debug.hpp"
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38
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39 #define PREDICTIONS_VERBOSE 0
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40
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41 // <NEW PREDICTION>
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42
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43 // Different defaults for different number of GC threads
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44 // They were chosen by running GCOld and SPECjbb on debris with different
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45 // numbers of GC threads and choosing them based on the results
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46
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47 // all the same
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48 static double rs_length_diff_defaults[] = {
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49 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0
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50 };
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51
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52 static double cost_per_card_ms_defaults[] = {
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53 0.01, 0.005, 0.005, 0.003, 0.003, 0.002, 0.002, 0.0015
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54 };
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55
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56 // all the same
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57 static double fully_young_cards_per_entry_ratio_defaults[] = {
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58 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0
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59 };
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60
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61 static double cost_per_entry_ms_defaults[] = {
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62 0.015, 0.01, 0.01, 0.008, 0.008, 0.0055, 0.0055, 0.005
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63 };
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64
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65 static double cost_per_byte_ms_defaults[] = {
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66 0.00006, 0.00003, 0.00003, 0.000015, 0.000015, 0.00001, 0.00001, 0.000009
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67 };
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68
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69 // these should be pretty consistent
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70 static double constant_other_time_ms_defaults[] = {
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71 5.0, 5.0, 5.0, 5.0, 5.0, 5.0, 5.0, 5.0
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72 };
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73
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74
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75 static double young_other_cost_per_region_ms_defaults[] = {
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76 0.3, 0.2, 0.2, 0.15, 0.15, 0.12, 0.12, 0.1
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77 };
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78
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79 static double non_young_other_cost_per_region_ms_defaults[] = {
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80 1.0, 0.7, 0.7, 0.5, 0.5, 0.42, 0.42, 0.30
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81 };
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82
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83 // </NEW PREDICTION>
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84
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85 // Help class for avoiding interleaved logging
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86 class LineBuffer: public StackObj {
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87
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88 private:
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89 static const int BUFFER_LEN = 1024;
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90 static const int INDENT_CHARS = 3;
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91 char _buffer[BUFFER_LEN];
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92 int _indent_level;
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93 int _cur;
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94
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95 void vappend(const char* format, va_list ap) {
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96 int res = vsnprintf(&_buffer[_cur], BUFFER_LEN - _cur, format, ap);
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97 if (res != -1) {
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98 _cur += res;
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99 } else {
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100 DEBUG_ONLY(warning("buffer too small in LineBuffer");)
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101 _buffer[BUFFER_LEN -1] = 0;
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102 _cur = BUFFER_LEN; // vsnprintf above should not add to _buffer if we are called again
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103 }
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104 }
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105
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106 public:
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107 explicit LineBuffer(int indent_level): _indent_level(indent_level), _cur(0) {
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108 for (; (_cur < BUFFER_LEN && _cur < (_indent_level * INDENT_CHARS)); _cur++) {
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109 _buffer[_cur] = ' ';
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110 }
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111 }
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112
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113 #ifndef PRODUCT
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114 ~LineBuffer() {
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115 assert(_cur == _indent_level * INDENT_CHARS, "pending data in buffer - append_and_print_cr() not called?");
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116 }
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117 #endif
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118
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119 void append(const char* format, ...) {
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120 va_list ap;
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121 va_start(ap, format);
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122 vappend(format, ap);
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123 va_end(ap);
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124 }
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125
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126 void append_and_print_cr(const char* format, ...) {
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127 va_list ap;
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128 va_start(ap, format);
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129 vappend(format, ap);
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130 va_end(ap);
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131 gclog_or_tty->print_cr("%s", _buffer);
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132 _cur = _indent_level * INDENT_CHARS;
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133 }
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134 };
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135
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136 G1CollectorPolicy::G1CollectorPolicy() :
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137 _parallel_gc_threads(G1CollectedHeap::use_parallel_gc_threads()
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138 ? ParallelGCThreads : 1),
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139
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140 _n_pauses(0),
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141 _recent_rs_scan_times_ms(new TruncatedSeq(NumPrevPausesForHeuristics)),
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142 _recent_pause_times_ms(new TruncatedSeq(NumPrevPausesForHeuristics)),
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143 _recent_rs_sizes(new TruncatedSeq(NumPrevPausesForHeuristics)),
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144 _recent_gc_times_ms(new TruncatedSeq(NumPrevPausesForHeuristics)),
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145 _all_pause_times_ms(new NumberSeq()),
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146 _stop_world_start(0.0),
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147 _all_stop_world_times_ms(new NumberSeq()),
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148 _all_yield_times_ms(new NumberSeq()),
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149 _using_new_ratio_calculations(false),
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150
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151 _all_mod_union_times_ms(new NumberSeq()),
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152
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153 _summary(new Summary()),
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154
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155 #ifndef PRODUCT
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156 _cur_clear_ct_time_ms(0.0),
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157 _min_clear_cc_time_ms(-1.0),
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158 _max_clear_cc_time_ms(-1.0),
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159 _cur_clear_cc_time_ms(0.0),
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160 _cum_clear_cc_time_ms(0.0),
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161 _num_cc_clears(0L),
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162 #endif
342
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163
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164 _region_num_young(0),
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165 _region_num_tenured(0),
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166 _prev_region_num_young(0),
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167 _prev_region_num_tenured(0),
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168
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169 _aux_num(10),
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170 _all_aux_times_ms(new NumberSeq[_aux_num]),
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171 _cur_aux_start_times_ms(new double[_aux_num]),
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172 _cur_aux_times_ms(new double[_aux_num]),
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173 _cur_aux_times_set(new bool[_aux_num]),
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174
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175 _concurrent_mark_remark_times_ms(new TruncatedSeq(NumPrevPausesForHeuristics)),
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176 _concurrent_mark_cleanup_times_ms(new TruncatedSeq(NumPrevPausesForHeuristics)),
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177
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178 // <NEW PREDICTION>
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179
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180 _alloc_rate_ms_seq(new TruncatedSeq(TruncatedSeqLength)),
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181 _prev_collection_pause_end_ms(0.0),
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182 _pending_card_diff_seq(new TruncatedSeq(TruncatedSeqLength)),
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183 _rs_length_diff_seq(new TruncatedSeq(TruncatedSeqLength)),
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184 _cost_per_card_ms_seq(new TruncatedSeq(TruncatedSeqLength)),
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185 _fully_young_cards_per_entry_ratio_seq(new TruncatedSeq(TruncatedSeqLength)),
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186 _partially_young_cards_per_entry_ratio_seq(
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187 new TruncatedSeq(TruncatedSeqLength)),
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188 _cost_per_entry_ms_seq(new TruncatedSeq(TruncatedSeqLength)),
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189 _partially_young_cost_per_entry_ms_seq(new TruncatedSeq(TruncatedSeqLength)),
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190 _cost_per_byte_ms_seq(new TruncatedSeq(TruncatedSeqLength)),
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191 _cost_per_byte_ms_during_cm_seq(new TruncatedSeq(TruncatedSeqLength)),
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192 _constant_other_time_ms_seq(new TruncatedSeq(TruncatedSeqLength)),
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193 _young_other_cost_per_region_ms_seq(new TruncatedSeq(TruncatedSeqLength)),
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194 _non_young_other_cost_per_region_ms_seq(
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195 new TruncatedSeq(TruncatedSeqLength)),
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196
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197 _pending_cards_seq(new TruncatedSeq(TruncatedSeqLength)),
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198 _scanned_cards_seq(new TruncatedSeq(TruncatedSeqLength)),
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199 _rs_lengths_seq(new TruncatedSeq(TruncatedSeqLength)),
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200
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201 _pause_time_target_ms((double) MaxGCPauseMillis),
342
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202
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203 // </NEW PREDICTION>
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204
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205 _full_young_gcs(true),
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206 _full_young_pause_num(0),
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207 _partial_young_pause_num(0),
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208
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209 _during_marking(false),
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210 _in_marking_window(false),
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211 _in_marking_window_im(false),
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212
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213 _known_garbage_ratio(0.0),
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214 _known_garbage_bytes(0),
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215
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216 _young_gc_eff_seq(new TruncatedSeq(TruncatedSeqLength)),
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217
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218 _recent_prev_end_times_for_all_gcs_sec(new TruncatedSeq(NumPrevPausesForHeuristics)),
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219
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220 _recent_CS_bytes_used_before(new TruncatedSeq(NumPrevPausesForHeuristics)),
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221 _recent_CS_bytes_surviving(new TruncatedSeq(NumPrevPausesForHeuristics)),
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222
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223 _recent_avg_pause_time_ratio(0.0),
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224 _num_markings(0),
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225 _n_marks(0),
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226 _n_pauses_at_mark_end(0),
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227
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228 _all_full_gc_times_ms(new NumberSeq()),
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229
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230 // G1PausesBtwnConcMark defaults to -1
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231 // so the hack is to do the cast QQQ FIXME
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232 _pauses_btwn_concurrent_mark((size_t)G1PausesBtwnConcMark),
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233 _n_marks_since_last_pause(0),
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234 _initiate_conc_mark_if_possible(false),
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
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235 _during_initial_mark_pause(false),
342
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236 _should_revert_to_full_young_gcs(false),
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237 _last_full_young_gc(false),
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238
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239 _eden_bytes_before_gc(0),
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240 _survivor_bytes_before_gc(0),
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
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241 _capacity_before_gc(0),
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242
342
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243 _prev_collection_pause_used_at_end_bytes(0),
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244
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245 _collection_set(NULL),
1394
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246 _collection_set_size(0),
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247 _collection_set_bytes_used_before(0),
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248
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249 // Incremental CSet attributes
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250 _inc_cset_build_state(Inactive),
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251 _inc_cset_head(NULL),
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252 _inc_cset_tail(NULL),
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253 _inc_cset_size(0),
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254 _inc_cset_young_index(0),
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255 _inc_cset_bytes_used_before(0),
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256 _inc_cset_max_finger(NULL),
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257 _inc_cset_recorded_young_bytes(0),
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258 _inc_cset_recorded_rs_lengths(0),
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259 _inc_cset_predicted_elapsed_time_ms(0.0),
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260 _inc_cset_predicted_bytes_to_copy(0),
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261
342
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262 #ifdef _MSC_VER // the use of 'this' below gets a warning, make it go away
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263 #pragma warning( disable:4355 ) // 'this' : used in base member initializer list
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264 #endif // _MSC_VER
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265
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266 _short_lived_surv_rate_group(new SurvRateGroup(this, "Short Lived",
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267 G1YoungSurvRateNumRegionsSummary)),
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268 _survivor_surv_rate_group(new SurvRateGroup(this, "Survivor",
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parents: 526
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269 G1YoungSurvRateNumRegionsSummary)),
342
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270 // add here any more surv rate groups
545
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271 _recorded_survivor_regions(0),
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parents: 526
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272 _recorded_survivor_head(NULL),
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parents: 526
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273 _recorded_survivor_tail(NULL),
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274 _survivors_age_table(true),
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275
3914
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276 _gc_overhead_perc(0.0) {
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277
942
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278 // Set up the region size and associated fields. Given that the
2c79770d1f6e 6819085: G1: use larger and/or user settable region size
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279 // policy is created before the heap, we have to set this up here,
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280 // so it's done as soon as possible.
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281 HeapRegion::setup_heap_region_size(Arguments::min_heap_size());
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282 HeapRegionRemSet::setup_remset_size();
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283
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284 G1ErgoVerbose::initialize();
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285 if (PrintAdaptiveSizePolicy) {
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286 // Currently, we only use a single switch for all the heuristics.
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287 G1ErgoVerbose::set_enabled(true);
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288 // Given that we don't currently have a verboseness level
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289 // parameter, we'll hardcode this to high. This can be easily
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290 // changed in the future.
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291 G1ErgoVerbose::set_level(ErgoHigh);
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292 } else {
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293 G1ErgoVerbose::set_enabled(false);
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294 }
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
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295
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296 // Verify PLAB sizes
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297 const uint region_size = HeapRegion::GrainWords;
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298 if (YoungPLABSize > region_size || OldPLABSize > region_size) {
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299 char buffer[128];
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300 jio_snprintf(buffer, sizeof(buffer), "%sPLABSize should be at most %u",
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301 OldPLABSize > region_size ? "Old" : "Young", region_size);
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302 vm_exit_during_initialization(buffer);
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303 }
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304
342
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305 _recent_prev_end_times_for_all_gcs_sec->add(os::elapsedTime());
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306 _prev_collection_pause_end_ms = os::elapsedTime() * 1000.0;
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parents:
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307
1611
215576b54709 6946048: G1: improvements to +PrintGCDetails output
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parents: 1610
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308 _par_last_gc_worker_start_times_ms = new double[_parallel_gc_threads];
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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309 _par_last_ext_root_scan_times_ms = new double[_parallel_gc_threads];
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
310 _par_last_mark_stack_scan_times_ms = new double[_parallel_gc_threads];
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
311
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
diff changeset
312 _par_last_update_rs_times_ms = new double[_parallel_gc_threads];
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
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313 _par_last_update_rs_processed_buffers = new double[_parallel_gc_threads];
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
314
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
315 _par_last_scan_rs_times_ms = new double[_parallel_gc_threads];
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
316
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
317 _par_last_obj_copy_times_ms = new double[_parallel_gc_threads];
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
318
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
diff changeset
319 _par_last_termination_times_ms = new double[_parallel_gc_threads];
1611
215576b54709 6946048: G1: improvements to +PrintGCDetails output
tonyp
parents: 1610
diff changeset
320 _par_last_termination_attempts = new double[_parallel_gc_threads];
215576b54709 6946048: G1: improvements to +PrintGCDetails output
tonyp
parents: 1610
diff changeset
321 _par_last_gc_worker_end_times_ms = new double[_parallel_gc_threads];
2430
5c0b591e1074 6948149: G1: Imbalance in termination times
brutisso
parents: 2363
diff changeset
322 _par_last_gc_worker_times_ms = new double[_parallel_gc_threads];
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
323
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
324 // start conservatively
751
20c6f43950b5 6490395: G1: Tidy up command line flags.
johnc
parents: 677
diff changeset
325 _expensive_region_limit_ms = 0.5 * (double) MaxGCPauseMillis;
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
326
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
327 // <NEW PREDICTION>
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
328
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
329 int index;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
330 if (ParallelGCThreads == 0)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
331 index = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
332 else if (ParallelGCThreads > 8)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
333 index = 7;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
334 else
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
335 index = ParallelGCThreads - 1;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
336
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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diff changeset
337 _pending_card_diff_seq->add(0.0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
338 _rs_length_diff_seq->add(rs_length_diff_defaults[index]);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
339 _cost_per_card_ms_seq->add(cost_per_card_ms_defaults[index]);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
340 _fully_young_cards_per_entry_ratio_seq->add(
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
341 fully_young_cards_per_entry_ratio_defaults[index]);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
342 _cost_per_entry_ms_seq->add(cost_per_entry_ms_defaults[index]);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
343 _cost_per_byte_ms_seq->add(cost_per_byte_ms_defaults[index]);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
344 _constant_other_time_ms_seq->add(constant_other_time_ms_defaults[index]);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
345 _young_other_cost_per_region_ms_seq->add(
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
346 young_other_cost_per_region_ms_defaults[index]);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
347 _non_young_other_cost_per_region_ms_seq->add(
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
348 non_young_other_cost_per_region_ms_defaults[index]);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
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349
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
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350 // </NEW PREDICTION>
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
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351
1610
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents: 1579
diff changeset
352 // Below, we might need to calculate the pause time target based on
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents: 1579
diff changeset
353 // the pause interval. When we do so we are going to give G1 maximum
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents: 1579
diff changeset
354 // flexibility and allow it to do pauses when it needs to. So, we'll
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents: 1579
diff changeset
355 // arrange that the pause interval to be pause time target + 1 to
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents: 1579
diff changeset
356 // ensure that a) the pause time target is maximized with respect to
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents: 1579
diff changeset
357 // the pause interval and b) we maintain the invariant that pause
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents: 1579
diff changeset
358 // time target < pause interval. If the user does not want this
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents: 1579
diff changeset
359 // maximum flexibility, they will have to set the pause interval
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents: 1579
diff changeset
360 // explicitly.
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents: 1579
diff changeset
361
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents: 1579
diff changeset
362 // First make sure that, if either parameter is set, its value is
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents: 1579
diff changeset
363 // reasonable.
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents: 1579
diff changeset
364 if (!FLAG_IS_DEFAULT(MaxGCPauseMillis)) {
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents: 1579
diff changeset
365 if (MaxGCPauseMillis < 1) {
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents: 1579
diff changeset
366 vm_exit_during_initialization("MaxGCPauseMillis should be "
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents: 1579
diff changeset
367 "greater than 0");
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents: 1579
diff changeset
368 }
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents: 1579
diff changeset
369 }
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents: 1579
diff changeset
370 if (!FLAG_IS_DEFAULT(GCPauseIntervalMillis)) {
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents: 1579
diff changeset
371 if (GCPauseIntervalMillis < 1) {
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents: 1579
diff changeset
372 vm_exit_during_initialization("GCPauseIntervalMillis should be "
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents: 1579
diff changeset
373 "greater than 0");
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents: 1579
diff changeset
374 }
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents: 1579
diff changeset
375 }
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents: 1579
diff changeset
376
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents: 1579
diff changeset
377 // Then, if the pause time target parameter was not set, set it to
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents: 1579
diff changeset
378 // the default value.
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents: 1579
diff changeset
379 if (FLAG_IS_DEFAULT(MaxGCPauseMillis)) {
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents: 1579
diff changeset
380 if (FLAG_IS_DEFAULT(GCPauseIntervalMillis)) {
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents: 1579
diff changeset
381 // The default pause time target in G1 is 200ms
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents: 1579
diff changeset
382 FLAG_SET_DEFAULT(MaxGCPauseMillis, 200);
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents: 1579
diff changeset
383 } else {
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents: 1579
diff changeset
384 // We do not allow the pause interval to be set without the
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents: 1579
diff changeset
385 // pause time target
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents: 1579
diff changeset
386 vm_exit_during_initialization("GCPauseIntervalMillis cannot be set "
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents: 1579
diff changeset
387 "without setting MaxGCPauseMillis");
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents: 1579
diff changeset
388 }
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents: 1579
diff changeset
389 }
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents: 1579
diff changeset
390
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents: 1579
diff changeset
391 // Then, if the interval parameter was not set, set it according to
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents: 1579
diff changeset
392 // the pause time target (this will also deal with the case when the
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents: 1579
diff changeset
393 // pause time target is the default value).
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents: 1579
diff changeset
394 if (FLAG_IS_DEFAULT(GCPauseIntervalMillis)) {
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents: 1579
diff changeset
395 FLAG_SET_DEFAULT(GCPauseIntervalMillis, MaxGCPauseMillis + 1);
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents: 1579
diff changeset
396 }
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents: 1579
diff changeset
397
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents: 1579
diff changeset
398 // Finally, make sure that the two parameters are consistent.
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents: 1579
diff changeset
399 if (MaxGCPauseMillis >= GCPauseIntervalMillis) {
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents: 1579
diff changeset
400 char buffer[256];
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents: 1579
diff changeset
401 jio_snprintf(buffer, 256,
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents: 1579
diff changeset
402 "MaxGCPauseMillis (%u) should be less than "
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents: 1579
diff changeset
403 "GCPauseIntervalMillis (%u)",
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents: 1579
diff changeset
404 MaxGCPauseMillis, GCPauseIntervalMillis);
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents: 1579
diff changeset
405 vm_exit_during_initialization(buffer);
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents: 1579
diff changeset
406 }
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents: 1579
diff changeset
407
751
20c6f43950b5 6490395: G1: Tidy up command line flags.
johnc
parents: 677
diff changeset
408 double max_gc_time = (double) MaxGCPauseMillis / 1000.0;
1610
79107c3a6bd5 6949307: G1: raise a vm error, do not core dump, if target pause time and target interval are inconsistent
tonyp
parents: 1579
diff changeset
409 double time_slice = (double) GCPauseIntervalMillis / 1000.0;
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
410 _mmu_tracker = new G1MMUTrackerQueue(time_slice, max_gc_time);
751
20c6f43950b5 6490395: G1: Tidy up command line flags.
johnc
parents: 677
diff changeset
411 _sigma = (double) G1ConfidencePercent / 100.0;
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
412
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
413 // start conservatively (around 50ms is about right)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
414 _concurrent_mark_remark_times_ms->add(0.05);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
415 _concurrent_mark_cleanup_times_ms->add(0.20);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
416 _tenuring_threshold = MaxTenuringThreshold;
3868
ae73da50be4b 7081064: G1: remove develop params G1FixedSurvivorSpaceSize, G1FixedTenuringThreshold, and G1FixedEdenSize
tonyp
parents: 3867
diff changeset
417 // _max_survivor_regions will be calculated by
3919
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
418 // update_young_list_target_length() during initialization.
3868
ae73da50be4b 7081064: G1: remove develop params G1FixedSurvivorSpaceSize, G1FixedTenuringThreshold, and G1FixedEdenSize
tonyp
parents: 3867
diff changeset
419 _max_survivor_regions = 0;
545
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 526
diff changeset
420
1356
56507bcd639e 6937160: G1: should observe GCTimeRatio
tonyp
parents: 1285
diff changeset
421 assert(GCTimeRatio > 0,
56507bcd639e 6937160: G1: should observe GCTimeRatio
tonyp
parents: 1285
diff changeset
422 "we should have set it to a default value set_g1_gc_flags() "
56507bcd639e 6937160: G1: should observe GCTimeRatio
tonyp
parents: 1285
diff changeset
423 "if a user set it to 0");
56507bcd639e 6937160: G1: should observe GCTimeRatio
tonyp
parents: 1285
diff changeset
424 _gc_overhead_perc = 100.0 * (1.0 / (1.0 + GCTimeRatio));
56507bcd639e 6937160: G1: should observe GCTimeRatio
tonyp
parents: 1285
diff changeset
425
3919
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
426 uintx reserve_perc = G1ReservePercent;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
427 // Put an artificial ceiling on this so that it's not set to a silly value.
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
428 if (reserve_perc > 50) {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
429 reserve_perc = 50;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
430 warning("G1ReservePercent is set to a value that is too large, "
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
431 "it's been updated to %u", reserve_perc);
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
432 }
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
433 _reserve_factor = (double) reserve_perc / 100.0;
3920
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds
brutisso
parents: 3919
diff changeset
434 // This will be set when the heap is expanded
3919
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
435 // for the first time during initialization.
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
436 _reserve_regions = 0;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
437
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
438 initialize_all();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
439 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
440
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
441 // Increment "i", mod "len"
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
442 static void inc_mod(int& i, int len) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
443 i++; if (i == len) i = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
444 }
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 void G1CollectorPolicy::initialize_flags() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
447 set_min_alignment(HeapRegion::GrainBytes);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
448 set_max_alignment(GenRemSet::max_alignment_constraint(rem_set_name()));
547
1e458753107d 6802413: G1: G1FixedSurvivorSpaceSize should be converted into regions in calculate_survivors_policy()
apetrusenko
parents: 545
diff changeset
449 if (SurvivorRatio < 1) {
1e458753107d 6802413: G1: G1FixedSurvivorSpaceSize should be converted into regions in calculate_survivors_policy()
apetrusenko
parents: 545
diff changeset
450 vm_exit_during_initialization("Invalid survivor ratio specified");
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apetrusenko
parents: 545
diff changeset
451 }
342
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parents:
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452 CollectorPolicy::initialize_flags();
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parents:
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453 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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454
1285
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tonyp
parents: 1283
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455 // The easiest way to deal with the parsing of the NewSize /
a1c410de27e4 6928065: G1: use existing command line parameters to set the young generation size
tonyp
parents: 1283
diff changeset
456 // MaxNewSize / etc. parameteres is to re-use the code in the
a1c410de27e4 6928065: G1: use existing command line parameters to set the young generation size
tonyp
parents: 1283
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457 // TwoGenerationCollectorPolicy class. This is similar to what
a1c410de27e4 6928065: G1: use existing command line parameters to set the young generation size
tonyp
parents: 1283
diff changeset
458 // ParallelScavenge does with its GenerationSizer class (see
a1c410de27e4 6928065: G1: use existing command line parameters to set the young generation size
tonyp
parents: 1283
diff changeset
459 // ParallelScavengeHeap::initialize()). We might change this in the
a1c410de27e4 6928065: G1: use existing command line parameters to set the young generation size
tonyp
parents: 1283
diff changeset
460 // future, but it's a good start.
a1c410de27e4 6928065: G1: use existing command line parameters to set the young generation size
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parents: 1283
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461 class G1YoungGenSizer : public TwoGenerationCollectorPolicy {
a1c410de27e4 6928065: G1: use existing command line parameters to set the young generation size
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parents: 1283
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462
a1c410de27e4 6928065: G1: use existing command line parameters to set the young generation size
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463 public:
a1c410de27e4 6928065: G1: use existing command line parameters to set the young generation size
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464 G1YoungGenSizer() {
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parents: 1283
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465 initialize_flags();
a1c410de27e4 6928065: G1: use existing command line parameters to set the young generation size
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parents: 1283
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466 initialize_size_info();
a1c410de27e4 6928065: G1: use existing command line parameters to set the young generation size
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parents: 1283
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467 }
3920
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468 size_t size_to_region_num(size_t byte_size) {
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds
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469 return MAX2((size_t) 1, byte_size / HeapRegion::GrainBytes);
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds
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470 }
1285
a1c410de27e4 6928065: G1: use existing command line parameters to set the young generation size
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471 size_t min_young_region_num() {
a1c410de27e4 6928065: G1: use existing command line parameters to set the young generation size
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parents: 1283
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472 return size_to_region_num(_min_gen0_size);
a1c410de27e4 6928065: G1: use existing command line parameters to set the young generation size
tonyp
parents: 1283
diff changeset
473 }
a1c410de27e4 6928065: G1: use existing command line parameters to set the young generation size
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parents: 1283
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474 size_t initial_young_region_num() {
a1c410de27e4 6928065: G1: use existing command line parameters to set the young generation size
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parents: 1283
diff changeset
475 return size_to_region_num(_initial_gen0_size);
a1c410de27e4 6928065: G1: use existing command line parameters to set the young generation size
tonyp
parents: 1283
diff changeset
476 }
a1c410de27e4 6928065: G1: use existing command line parameters to set the young generation size
tonyp
parents: 1283
diff changeset
477 size_t max_young_region_num() {
a1c410de27e4 6928065: G1: use existing command line parameters to set the young generation size
tonyp
parents: 1283
diff changeset
478 return size_to_region_num(_max_gen0_size);
a1c410de27e4 6928065: G1: use existing command line parameters to set the young generation size
tonyp
parents: 1283
diff changeset
479 }
a1c410de27e4 6928065: G1: use existing command line parameters to set the young generation size
tonyp
parents: 1283
diff changeset
480 };
a1c410de27e4 6928065: G1: use existing command line parameters to set the young generation size
tonyp
parents: 1283
diff changeset
481
3920
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds
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diff changeset
482 void G1CollectorPolicy::update_young_list_size_using_newratio(size_t number_of_heap_regions) {
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds
brutisso
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diff changeset
483 assert(number_of_heap_regions > 0, "Heap must be initialized");
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds
brutisso
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484 size_t young_size = number_of_heap_regions / (NewRatio + 1);
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds
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485 _min_desired_young_length = young_size;
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds
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486 _max_desired_young_length = young_size;
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds
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487 }
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds
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diff changeset
488
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
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489 void G1CollectorPolicy::init() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
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490 // Set aside an initial future to_space.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
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491 _g1 = G1CollectedHeap::heap();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
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parents:
diff changeset
492
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
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493 assert(Heap_lock->owned_by_self(), "Locking discipline.");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
494
545
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495 initialize_gc_policy_counters();
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 526
diff changeset
496
3867
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497 G1YoungGenSizer sizer;
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
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498 size_t initial_region_num = sizer.initial_young_region_num();
3920
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds
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499 _min_desired_young_length = sizer.min_young_region_num();
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds
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diff changeset
500 _max_desired_young_length = sizer.max_young_region_num();
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds
brutisso
parents: 3919
diff changeset
501
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds
brutisso
parents: 3919
diff changeset
502 if (FLAG_IS_CMDLINE(NewRatio)) {
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds
brutisso
parents: 3919
diff changeset
503 if (FLAG_IS_CMDLINE(NewSize) || FLAG_IS_CMDLINE(MaxNewSize)) {
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds
brutisso
parents: 3919
diff changeset
504 gclog_or_tty->print_cr("-XX:NewSize and -XX:MaxNewSize overrides -XX:NewRatio");
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds
brutisso
parents: 3919
diff changeset
505 } else {
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds
brutisso
parents: 3919
diff changeset
506 // Treat NewRatio as a fixed size that is only recalculated when the heap size changes
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds
brutisso
parents: 3919
diff changeset
507 size_t heap_regions = sizer.size_to_region_num(_g1->n_regions());
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds
brutisso
parents: 3919
diff changeset
508 update_young_list_size_using_newratio(heap_regions);
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds
brutisso
parents: 3919
diff changeset
509 _using_new_ratio_calculations = true;
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds
brutisso
parents: 3919
diff changeset
510 }
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds
brutisso
parents: 3919
diff changeset
511 }
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds
brutisso
parents: 3919
diff changeset
512
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds
brutisso
parents: 3919
diff changeset
513 // GenCollectorPolicy guarantees that min <= initial <= max.
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds
brutisso
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diff changeset
514 // Asserting here just to state that we rely on this property.
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds
brutisso
parents: 3919
diff changeset
515 assert(_min_desired_young_length <= _max_desired_young_length, "Invalid min/max young gen size values");
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds
brutisso
parents: 3919
diff changeset
516 assert(initial_region_num <= _max_desired_young_length, "Initial young gen size too large");
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds
brutisso
parents: 3919
diff changeset
517 assert(_min_desired_young_length <= initial_region_num, "Initial young gen size too small");
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds
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parents: 3919
diff changeset
518
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds
brutisso
parents: 3919
diff changeset
519 set_adaptive_young_list_length(_min_desired_young_length < _max_desired_young_length);
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds
brutisso
parents: 3919
diff changeset
520 if (adaptive_young_list_length()) {
3867
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
521 _young_list_fixed_length = 0;
1394
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
522 } else {
3867
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
523 _young_list_fixed_length = initial_region_num;
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
524 }
3867
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
525 _free_regions_at_end_of_collection = _g1->free_regions();
3919
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
526 update_young_list_target_length();
3920
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds
brutisso
parents: 3919
diff changeset
527 _prev_eden_capacity = _young_list_target_length * HeapRegion::GrainBytes;
1394
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
528
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
529 // We may immediately start allocating regions and placing them on the
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
530 // collection set list. Initialize the per-collection set info
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
531 start_incremental_cset_building();
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
532 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
533
545
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 526
diff changeset
534 // Create the jstat counters for the policy.
3919
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
535 void G1CollectorPolicy::initialize_gc_policy_counters() {
3867
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
536 _gc_policy_counters = new GCPolicyCounters("GarbageFirst", 1, 3);
545
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 526
diff changeset
537 }
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 526
diff changeset
538
3919
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
539 bool G1CollectorPolicy::predict_will_fit(size_t young_length,
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
540 double base_time_ms,
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
541 size_t base_free_regions,
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
542 double target_pause_time_ms) {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
543 if (young_length >= base_free_regions) {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
544 // end condition 1: not enough space for the young regions
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
545 return false;
3919
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
546 }
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
547
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
548 double accum_surv_rate = accum_yg_surv_rate_pred((int)(young_length - 1));
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
549 size_t bytes_to_copy =
3919
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
550 (size_t) (accum_surv_rate * (double) HeapRegion::GrainBytes);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
551 double copy_time_ms = predict_object_copy_time_ms(bytes_to_copy);
3919
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
552 double young_other_time_ms = predict_young_other_time_ms(young_length);
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
553 double pause_time_ms = base_time_ms + copy_time_ms + young_other_time_ms;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
554 if (pause_time_ms > target_pause_time_ms) {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
555 // end condition 2: prediction is over the target pause time
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
556 return false;
3919
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
557 }
342
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 size_t free_bytes =
3919
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
560 (base_free_regions - young_length) * HeapRegion::GrainBytes;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
561 if ((2.0 * sigma()) * (double) bytes_to_copy > (double) free_bytes) {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
562 // end condition 3: out-of-space (conservatively!)
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
563 return false;
3919
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
564 }
342
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 // success!
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
567 return true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
568 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
569
3920
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds
brutisso
parents: 3919
diff changeset
570 void G1CollectorPolicy::record_new_heap_size(size_t new_number_of_regions) {
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds
brutisso
parents: 3919
diff changeset
571 // re-calculate the necessary reserve
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds
brutisso
parents: 3919
diff changeset
572 double reserve_regions_d = (double) new_number_of_regions * _reserve_factor;
3919
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
573 // We use ceiling so that if reserve_regions_d is > 0.0 (but
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
574 // smaller than 1.0) we'll get 1.
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
575 _reserve_regions = (size_t) ceil(reserve_regions_d);
3920
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds
brutisso
parents: 3919
diff changeset
576
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds
brutisso
parents: 3919
diff changeset
577 if (_using_new_ratio_calculations) {
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds
brutisso
parents: 3919
diff changeset
578 // -XX:NewRatio was specified so we need to update the
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds
brutisso
parents: 3919
diff changeset
579 // young gen length when the heap size has changed.
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds
brutisso
parents: 3919
diff changeset
580 update_young_list_size_using_newratio(new_number_of_regions);
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds
brutisso
parents: 3919
diff changeset
581 }
3919
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
582 }
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
583
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
584 size_t G1CollectorPolicy::calculate_young_list_desired_min_length(
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
585 size_t base_min_length) {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
586 size_t desired_min_length = 0;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
587 if (adaptive_young_list_length()) {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
588 if (_alloc_rate_ms_seq->num() > 3) {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
589 double now_sec = os::elapsedTime();
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
590 double when_ms = _mmu_tracker->when_max_gc_sec(now_sec) * 1000.0;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
591 double alloc_rate_ms = predict_alloc_rate_ms();
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
592 desired_min_length = (size_t) ceil(alloc_rate_ms * when_ms);
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
593 } else {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
594 // otherwise we don't have enough info to make the prediction
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
595 }
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
596 }
3920
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds
brutisso
parents: 3919
diff changeset
597 desired_min_length += base_min_length;
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds
brutisso
parents: 3919
diff changeset
598 // make sure we don't go below any user-defined minimum bound
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds
brutisso
parents: 3919
diff changeset
599 return MAX2(_min_desired_young_length, desired_min_length);
3919
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
600 }
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
601
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
602 size_t G1CollectorPolicy::calculate_young_list_desired_max_length() {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
603 // Here, we might want to also take into account any additional
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
604 // constraints (i.e., user-defined minimum bound). Currently, we
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
605 // effectively don't set this bound.
3920
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds
brutisso
parents: 3919
diff changeset
606 return _max_desired_young_length;
3919
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
607 }
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
608
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
609 void G1CollectorPolicy::update_young_list_target_length(size_t rs_lengths) {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
610 if (rs_lengths == (size_t) -1) {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
611 // if it's set to the default value (-1), we should predict it;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
612 // otherwise, use the given value.
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
613 rs_lengths = (size_t) get_new_prediction(_rs_lengths_seq);
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
614 }
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
615
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
616 // Calculate the absolute and desired min bounds.
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
617
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
618 // This is how many young regions we already have (currently: the survivors).
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
619 size_t base_min_length = recorded_survivor_regions();
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
620 // This is the absolute minimum young length, which ensures that we
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
621 // can allocate one eden region in the worst-case.
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
622 size_t absolute_min_length = base_min_length + 1;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
623 size_t desired_min_length =
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
624 calculate_young_list_desired_min_length(base_min_length);
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
625 if (desired_min_length < absolute_min_length) {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
626 desired_min_length = absolute_min_length;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
627 }
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
628
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
629 // Calculate the absolute and desired max bounds.
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
630
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
631 // We will try our best not to "eat" into the reserve.
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
632 size_t absolute_max_length = 0;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
633 if (_free_regions_at_end_of_collection > _reserve_regions) {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
634 absolute_max_length = _free_regions_at_end_of_collection - _reserve_regions;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
635 }
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
636 size_t desired_max_length = calculate_young_list_desired_max_length();
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
637 if (desired_max_length > absolute_max_length) {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
638 desired_max_length = absolute_max_length;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
639 }
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
640
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
641 size_t young_list_target_length = 0;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
642 if (adaptive_young_list_length()) {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
643 if (full_young_gcs()) {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
644 young_list_target_length =
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
645 calculate_young_list_target_length(rs_lengths,
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
646 base_min_length,
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
647 desired_min_length,
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
648 desired_max_length);
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
649 _rs_lengths_prediction = rs_lengths;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
650 } else {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
651 // Don't calculate anything and let the code below bound it to
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
652 // the desired_min_length, i.e., do the next GC as soon as
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
653 // possible to maximize how many old regions we can add to it.
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
654 }
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
655 } else {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
656 if (full_young_gcs()) {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
657 young_list_target_length = _young_list_fixed_length;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
658 } else {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
659 // A bit arbitrary: during partially-young GCs we allocate half
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
660 // the young regions to try to add old regions to the CSet.
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
661 young_list_target_length = _young_list_fixed_length / 2;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
662 // We choose to accept that we might go under the desired min
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
663 // length given that we intentionally ask for a smaller young gen.
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
664 desired_min_length = absolute_min_length;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
665 }
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
666 }
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
667
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
668 // Make sure we don't go over the desired max length, nor under the
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
669 // desired min length. In case they clash, desired_min_length wins
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
670 // which is why that test is second.
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
671 if (young_list_target_length > desired_max_length) {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
672 young_list_target_length = desired_max_length;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
673 }
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
674 if (young_list_target_length < desired_min_length) {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
675 young_list_target_length = desired_min_length;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
676 }
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
677
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
678 assert(young_list_target_length > recorded_survivor_regions(),
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
679 "we should be able to allocate at least one eden region");
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
680 assert(young_list_target_length >= absolute_min_length, "post-condition");
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
681 _young_list_target_length = young_list_target_length;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
682
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
683 update_max_gc_locker_expansion();
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
684 }
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
685
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
686 size_t
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
687 G1CollectorPolicy::calculate_young_list_target_length(size_t rs_lengths,
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
688 size_t base_min_length,
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
689 size_t desired_min_length,
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
690 size_t desired_max_length) {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
691 assert(adaptive_young_list_length(), "pre-condition");
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
692 assert(full_young_gcs(), "only call this for fully-young GCs");
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
693
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
694 // In case some edge-condition makes the desired max length too small...
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
695 if (desired_max_length <= desired_min_length) {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
696 return desired_min_length;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
697 }
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
698
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
699 // We'll adjust min_young_length and max_young_length not to include
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
700 // the already allocated young regions (i.e., so they reflect the
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
701 // min and max eden regions we'll allocate). The base_min_length
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
702 // will be reflected in the predictions by the
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
703 // survivor_regions_evac_time prediction.
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
704 assert(desired_min_length > base_min_length, "invariant");
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
705 size_t min_young_length = desired_min_length - base_min_length;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
706 assert(desired_max_length > base_min_length, "invariant");
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
707 size_t max_young_length = desired_max_length - base_min_length;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
708
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
709 double target_pause_time_ms = _mmu_tracker->max_gc_time() * 1000.0;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
710 double survivor_regions_evac_time = predict_survivor_regions_evac_time();
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
711 size_t pending_cards = (size_t) get_new_prediction(_pending_cards_seq);
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
712 size_t adj_rs_lengths = rs_lengths + predict_rs_length_diff();
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
713 size_t scanned_cards = predict_young_card_num(adj_rs_lengths);
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
714 double base_time_ms =
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
715 predict_base_elapsed_time_ms(pending_cards, scanned_cards) +
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
716 survivor_regions_evac_time;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
717 size_t available_free_regions = _free_regions_at_end_of_collection;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
718 size_t base_free_regions = 0;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
719 if (available_free_regions > _reserve_regions) {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
720 base_free_regions = available_free_regions - _reserve_regions;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
721 }
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
722
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
723 // Here, we will make sure that the shortest young length that
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
724 // makes sense fits within the target pause time.
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
725
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
726 if (predict_will_fit(min_young_length, base_time_ms,
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
727 base_free_regions, target_pause_time_ms)) {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
728 // The shortest young length will fit into the target pause time;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
729 // we'll now check whether the absolute maximum number of young
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
730 // regions will fit in the target pause time. If not, we'll do
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
731 // a binary search between min_young_length and max_young_length.
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
732 if (predict_will_fit(max_young_length, base_time_ms,
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
733 base_free_regions, target_pause_time_ms)) {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
734 // The maximum young length will fit into the target pause time.
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
735 // We are done so set min young length to the maximum length (as
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
736 // the result is assumed to be returned in min_young_length).
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
737 min_young_length = max_young_length;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
738 } else {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
739 // The maximum possible number of young regions will not fit within
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
740 // the target pause time so we'll search for the optimal
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
741 // length. The loop invariants are:
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
742 //
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
743 // min_young_length < max_young_length
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
744 // min_young_length is known to fit into the target pause time
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
745 // max_young_length is known not to fit into the target pause time
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
746 //
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
747 // Going into the loop we know the above hold as we've just
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
748 // checked them. Every time around the loop we check whether
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
749 // the middle value between min_young_length and
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
750 // max_young_length fits into the target pause time. If it
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
751 // does, it becomes the new min. If it doesn't, it becomes
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
752 // the new max. This way we maintain the loop invariants.
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
753
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
754 assert(min_young_length < max_young_length, "invariant");
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
755 size_t diff = (max_young_length - min_young_length) / 2;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
756 while (diff > 0) {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
757 size_t young_length = min_young_length + diff;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
758 if (predict_will_fit(young_length, base_time_ms,
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
759 base_free_regions, target_pause_time_ms)) {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
760 min_young_length = young_length;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
761 } else {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
762 max_young_length = young_length;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
763 }
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
764 assert(min_young_length < max_young_length, "invariant");
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
765 diff = (max_young_length - min_young_length) / 2;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
766 }
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
767 // The results is min_young_length which, according to the
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
768 // loop invariants, should fit within the target pause time.
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
769
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
770 // These are the post-conditions of the binary search above:
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
771 assert(min_young_length < max_young_length,
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
772 "otherwise we should have discovered that max_young_length "
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
773 "fits into the pause target and not done the binary search");
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
774 assert(predict_will_fit(min_young_length, base_time_ms,
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
775 base_free_regions, target_pause_time_ms),
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
776 "min_young_length, the result of the binary search, should "
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
777 "fit into the pause target");
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
778 assert(!predict_will_fit(min_young_length + 1, base_time_ms,
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
779 base_free_regions, target_pause_time_ms),
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
780 "min_young_length, the result of the binary search, should be "
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
781 "optimal, so no larger length should fit into the pause target");
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
782 }
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
783 } else {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
784 // Even the minimum length doesn't fit into the pause time
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
785 // target, return it as the result nevertheless.
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
786 }
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
787 return base_min_length + min_young_length;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
788 }
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
789
545
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 526
diff changeset
790 double G1CollectorPolicy::predict_survivor_regions_evac_time() {
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 526
diff changeset
791 double survivor_regions_evac_time = 0.0;
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 526
diff changeset
792 for (HeapRegion * r = _recorded_survivor_head;
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 526
diff changeset
793 r != NULL && r != _recorded_survivor_tail->get_next_young_region();
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 526
diff changeset
794 r = r->get_next_young_region()) {
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 526
diff changeset
795 survivor_regions_evac_time += predict_region_elapsed_time_ms(r, true);
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 526
diff changeset
796 }
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 526
diff changeset
797 return survivor_regions_evac_time;
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 526
diff changeset
798 }
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 526
diff changeset
799
3919
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
800 void G1CollectorPolicy::revise_young_list_target_length_if_necessary() {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
801 guarantee( adaptive_young_list_length(), "should not call this otherwise" );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
802
1394
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
803 size_t rs_lengths = _g1->young_list()->sampled_rs_lengths();
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
804 if (rs_lengths > _rs_lengths_prediction) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
805 // add 10% to avoid having to recalculate often
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
806 size_t rs_lengths_prediction = rs_lengths * 1100 / 1000;
3919
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
807 update_young_list_target_length(rs_lengths_prediction);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
808 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
809 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
810
3919
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
811
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
812
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
813 HeapWord* G1CollectorPolicy::mem_allocate_work(size_t size,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
814 bool is_tlab,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
815 bool* gc_overhead_limit_was_exceeded) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
816 guarantee(false, "Not using this policy feature yet.");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
817 return NULL;
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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
820 // This method controls how a collector handles one or more
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
821 // of its generations being fully allocated.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
822 HeapWord* G1CollectorPolicy::satisfy_failed_allocation(size_t size,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
823 bool is_tlab) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
824 guarantee(false, "Not using this policy feature yet.");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
825 return NULL;
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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
828
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
829 #ifndef PRODUCT
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
830 bool G1CollectorPolicy::verify_young_ages() {
1394
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
831 HeapRegion* head = _g1->young_list()->first_region();
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
832 return
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
833 verify_young_ages(head, _short_lived_surv_rate_group);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
834 // also call verify_young_ages on any additional surv rate groups
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
835 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
836
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
837 bool
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
838 G1CollectorPolicy::verify_young_ages(HeapRegion* head,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
839 SurvRateGroup *surv_rate_group) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
840 guarantee( surv_rate_group != NULL, "pre-condition" );
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 const char* name = surv_rate_group->name();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
843 bool ret = true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
844 int prev_age = -1;
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 for (HeapRegion* curr = head;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
847 curr != NULL;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
848 curr = curr->get_next_young_region()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
849 SurvRateGroup* group = curr->surv_rate_group();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
850 if (group == NULL && !curr->is_survivor()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
851 gclog_or_tty->print_cr("## %s: encountered NULL surv_rate_group", name);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
852 ret = false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
853 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
854
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
855 if (surv_rate_group == group) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
856 int age = curr->age_in_surv_rate_group();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
857
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
858 if (age < 0) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
859 gclog_or_tty->print_cr("## %s: encountered negative age", name);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
860 ret = false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
861 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
862
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
863 if (age <= prev_age) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
864 gclog_or_tty->print_cr("## %s: region ages are not strictly increasing "
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
865 "(%d, %d)", name, age, prev_age);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
866 ret = false;
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 prev_age = age;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
869 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
870 }
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 return ret;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
873 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
874 #endif // PRODUCT
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
875
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
876 void G1CollectorPolicy::record_full_collection_start() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
877 _cur_collection_start_sec = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
878 // Release the future to-space so that it is available for compaction into.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
879 _g1->set_full_collection();
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 G1CollectorPolicy::record_full_collection_end() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
883 // Consider this like a collection pause for the purposes of allocation
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
884 // since last pause.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
885 double end_sec = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
886 double full_gc_time_sec = end_sec - _cur_collection_start_sec;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
887 double full_gc_time_ms = full_gc_time_sec * 1000.0;
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 _all_full_gc_times_ms->add(full_gc_time_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
890
595
3698e8f47799 6804746: G1: guarantee(variance() > -1.0,"variance should be >= 0") (due to evacuation failure)
tonyp
parents: 547
diff changeset
891 update_recent_gc_times(end_sec, full_gc_time_ms);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
892
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
893 _g1->clear_full_collection();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
894
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
895 // "Nuke" the heuristics that control the fully/partially young GC
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
896 // transitions and make sure we start with fully young GCs after the
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
897 // Full GC.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
898 set_full_young_gcs(true);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
899 _last_full_young_gc = false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
900 _should_revert_to_full_young_gcs = false;
1359
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
901 clear_initiate_conc_mark_if_possible();
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
902 clear_during_initial_mark_pause();
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
903 _known_garbage_bytes = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
904 _known_garbage_ratio = 0.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
905 _in_marking_window = false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
906 _in_marking_window_im = false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
907
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
908 _short_lived_surv_rate_group->start_adding_regions();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
909 // also call this on any additional surv rate groups
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
910
545
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 526
diff changeset
911 record_survivor_regions(0, NULL, NULL);
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 526
diff changeset
912
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
913 _prev_region_num_young = _region_num_young;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
914 _prev_region_num_tenured = _region_num_tenured;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
915
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
916 _free_regions_at_end_of_collection = _g1->free_regions();
545
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 526
diff changeset
917 // Reset survivors SurvRateGroup.
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 526
diff changeset
918 _survivor_surv_rate_group->reset();
3919
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
919 update_young_list_target_length();
1973
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations
tonyp
parents: 1972
diff changeset
920 }
342
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 G1CollectorPolicy::record_stop_world_start() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
923 _stop_world_start = os::elapsedTime();
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 G1CollectorPolicy::record_collection_pause_start(double start_time_sec,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
927 size_t start_used) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
928 if (PrintGCDetails) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
929 gclog_or_tty->stamp(PrintGCTimeStamps);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
930 gclog_or_tty->print("[GC pause");
3867
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
931 gclog_or_tty->print(" (%s)", full_young_gcs() ? "young" : "partial");
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
932 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
933
3919
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
934 // We only need to do this here as the policy will only be applied
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
935 // to the GC we're about to start. so, no point is calculating this
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
936 // every time we calculate / recalculate the target young length.
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
937 update_survivors_policy();
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
938
1973
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations
tonyp
parents: 1972
diff changeset
939 assert(_g1->used() == _g1->recalculate_used(),
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations
tonyp
parents: 1972
diff changeset
940 err_msg("sanity, used: "SIZE_FORMAT" recalculate_used: "SIZE_FORMAT,
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations
tonyp
parents: 1972
diff changeset
941 _g1->used(), _g1->recalculate_used()));
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
942
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
943 double s_w_t_ms = (start_time_sec - _stop_world_start) * 1000.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
944 _all_stop_world_times_ms->add(s_w_t_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
945 _stop_world_start = 0.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
946
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
947 _cur_collection_start_sec = start_time_sec;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
948 _cur_collection_pause_used_at_start_bytes = start_used;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
949 _cur_collection_pause_used_regions_at_start = _g1->used_regions();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
950 _pending_cards = _g1->pending_card_num();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
951 _max_pending_cards = _g1->max_pending_card_num();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
952
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
953 _bytes_in_collection_set_before_gc = 0;
3830
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents: 3823
diff changeset
954 _bytes_copied_during_gc = 0;
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
955
3764
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents: 2430
diff changeset
956 YoungList* young_list = _g1->young_list();
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents: 2430
diff changeset
957 _eden_bytes_before_gc = young_list->eden_used_bytes();
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents: 2430
diff changeset
958 _survivor_bytes_before_gc = young_list->survivor_used_bytes();
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents: 2430
diff changeset
959 _capacity_before_gc = _g1->capacity();
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents: 2430
diff changeset
960
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
961 #ifdef DEBUG
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
962 // initialise these to something well known so that we can spot
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
963 // if they are not set properly
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
964
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
965 for (int i = 0; i < _parallel_gc_threads; ++i) {
1611
215576b54709 6946048: G1: improvements to +PrintGCDetails output
tonyp
parents: 1610
diff changeset
966 _par_last_gc_worker_start_times_ms[i] = -1234.0;
215576b54709 6946048: G1: improvements to +PrintGCDetails output
tonyp
parents: 1610
diff changeset
967 _par_last_ext_root_scan_times_ms[i] = -1234.0;
215576b54709 6946048: G1: improvements to +PrintGCDetails output
tonyp
parents: 1610
diff changeset
968 _par_last_mark_stack_scan_times_ms[i] = -1234.0;
215576b54709 6946048: G1: improvements to +PrintGCDetails output
tonyp
parents: 1610
diff changeset
969 _par_last_update_rs_times_ms[i] = -1234.0;
215576b54709 6946048: G1: improvements to +PrintGCDetails output
tonyp
parents: 1610
diff changeset
970 _par_last_update_rs_processed_buffers[i] = -1234.0;
215576b54709 6946048: G1: improvements to +PrintGCDetails output
tonyp
parents: 1610
diff changeset
971 _par_last_scan_rs_times_ms[i] = -1234.0;
215576b54709 6946048: G1: improvements to +PrintGCDetails output
tonyp
parents: 1610
diff changeset
972 _par_last_obj_copy_times_ms[i] = -1234.0;
215576b54709 6946048: G1: improvements to +PrintGCDetails output
tonyp
parents: 1610
diff changeset
973 _par_last_termination_times_ms[i] = -1234.0;
215576b54709 6946048: G1: improvements to +PrintGCDetails output
tonyp
parents: 1610
diff changeset
974 _par_last_termination_attempts[i] = -1234.0;
215576b54709 6946048: G1: improvements to +PrintGCDetails output
tonyp
parents: 1610
diff changeset
975 _par_last_gc_worker_end_times_ms[i] = -1234.0;
2430
5c0b591e1074 6948149: G1: Imbalance in termination times
brutisso
parents: 2363
diff changeset
976 _par_last_gc_worker_times_ms[i] = -1234.0;
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
977 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
978 #endif
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 for (int i = 0; i < _aux_num; ++i) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
981 _cur_aux_times_ms[i] = 0.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
982 _cur_aux_times_set[i] = 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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
985 _satb_drain_time_set = false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
986 _last_satb_drain_processed_buffers = -1;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
987
3867
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
988 _last_young_gc_full = false;
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
989
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
990 // do that for any other surv rate groups
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
991 _short_lived_surv_rate_group->stop_adding_regions();
1282
b81f3572f355 6928059: G1: command line parameter renaming
tonyp
parents: 1261
diff changeset
992 _survivors_age_table.clear();
545
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 526
diff changeset
993
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
994 assert( verify_young_ages(), "region age verification" );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
995 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
996
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
997 void G1CollectorPolicy::record_mark_closure_time(double mark_closure_time_ms) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
998 _mark_closure_time_ms = mark_closure_time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
999 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1000
3867
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
1001 void G1CollectorPolicy::record_concurrent_mark_init_end(double
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1002 mark_init_elapsed_time_ms) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1003 _during_marking = true;
1359
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
1004 assert(!initiate_conc_mark_if_possible(), "we should have cleared it by now");
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
1005 clear_during_initial_mark_pause();
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1006 _cur_mark_stop_world_time_ms = mark_init_elapsed_time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1007 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1008
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1009 void G1CollectorPolicy::record_concurrent_mark_remark_start() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1010 _mark_remark_start_sec = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1011 _during_marking = false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1012 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1013
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1014 void G1CollectorPolicy::record_concurrent_mark_remark_end() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1015 double end_time_sec = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1016 double elapsed_time_ms = (end_time_sec - _mark_remark_start_sec)*1000.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1017 _concurrent_mark_remark_times_ms->add(elapsed_time_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1018 _cur_mark_stop_world_time_ms += elapsed_time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1019 _prev_collection_pause_end_ms += elapsed_time_ms;
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 _mmu_tracker->add_pause(_mark_remark_start_sec, end_time_sec, true);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1022 }
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 void G1CollectorPolicy::record_concurrent_mark_cleanup_start() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1025 _mark_cleanup_start_sec = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1026 }
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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1029 G1CollectorPolicy::record_concurrent_mark_cleanup_end(size_t freed_bytes,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1030 size_t max_live_bytes) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1031 record_concurrent_mark_cleanup_end_work1(freed_bytes, max_live_bytes);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1032 record_concurrent_mark_cleanup_end_work2();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1033 }
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
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1036 G1CollectorPolicy::
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1037 record_concurrent_mark_cleanup_end_work1(size_t freed_bytes,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1038 size_t max_live_bytes) {
3914
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
1039 if (_n_marks < 2) {
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
1040 _n_marks++;
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
1041 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1042 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1043
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1044 // The important thing about this is that it includes "os::elapsedTime".
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1045 void G1CollectorPolicy::record_concurrent_mark_cleanup_end_work2() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1046 double end_time_sec = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1047 double elapsed_time_ms = (end_time_sec - _mark_cleanup_start_sec)*1000.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1048 _concurrent_mark_cleanup_times_ms->add(elapsed_time_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1049 _cur_mark_stop_world_time_ms += elapsed_time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1050 _prev_collection_pause_end_ms += elapsed_time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1051
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1052 _mmu_tracker->add_pause(_mark_cleanup_start_sec, end_time_sec, true);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1053
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1054 _num_markings++;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1055 _n_pauses_at_mark_end = _n_pauses;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1056 _n_marks_since_last_pause++;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1057 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1058
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1059 void
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1060 G1CollectorPolicy::record_concurrent_mark_cleanup_completed() {
3867
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
1061 _should_revert_to_full_young_gcs = false;
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
1062 _last_full_young_gc = true;
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
1063 _in_marking_window = false;
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1064 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1065
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1066 void G1CollectorPolicy::record_concurrent_pause() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1067 if (_stop_world_start > 0.0) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1068 double yield_ms = (os::elapsedTime() - _stop_world_start) * 1000.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1069 _all_yield_times_ms->add(yield_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1070 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1071 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1072
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1073 void G1CollectorPolicy::record_concurrent_pause_end() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1074 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1075
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1076 template<class T>
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1077 T sum_of(T* sum_arr, int start, int n, int N) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1078 T sum = (T)0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1079 for (int i = 0; i < n; i++) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1080 int j = (start + i) % N;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1081 sum += sum_arr[j];
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 return sum;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1084 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1085
1611
215576b54709 6946048: G1: improvements to +PrintGCDetails output
tonyp
parents: 1610
diff changeset
1086 void G1CollectorPolicy::print_par_stats(int level,
215576b54709 6946048: G1: improvements to +PrintGCDetails output
tonyp
parents: 1610
diff changeset
1087 const char* str,
2430
5c0b591e1074 6948149: G1: Imbalance in termination times
brutisso
parents: 2363
diff changeset
1088 double* data) {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1089 double min = data[0], max = data[0];
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1090 double total = 0.0;
2363
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents: 2188
diff changeset
1091 LineBuffer buf(level);
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents: 2188
diff changeset
1092 buf.append("[%s (ms):", str);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1093 for (uint i = 0; i < ParallelGCThreads; ++i) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1094 double val = data[i];
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1095 if (val < min)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1096 min = val;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1097 if (val > max)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1098 max = val;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1099 total += val;
2363
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents: 2188
diff changeset
1100 buf.append(" %3.1lf", val);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1101 }
2430
5c0b591e1074 6948149: G1: Imbalance in termination times
brutisso
parents: 2363
diff changeset
1102 buf.append_and_print_cr("");
5c0b591e1074 6948149: G1: Imbalance in termination times
brutisso
parents: 2363
diff changeset
1103 double avg = total / (double) ParallelGCThreads;
5c0b591e1074 6948149: G1: Imbalance in termination times
brutisso
parents: 2363
diff changeset
1104 buf.append_and_print_cr(" Avg: %5.1lf, Min: %5.1lf, Max: %5.1lf, Diff: %5.1lf]",
5c0b591e1074 6948149: G1: Imbalance in termination times
brutisso
parents: 2363
diff changeset
1105 avg, min, max, max - min);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1106 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1107
1611
215576b54709 6946048: G1: improvements to +PrintGCDetails output
tonyp
parents: 1610
diff changeset
1108 void G1CollectorPolicy::print_par_sizes(int level,
215576b54709 6946048: G1: improvements to +PrintGCDetails output
tonyp
parents: 1610
diff changeset
1109 const char* str,
2430
5c0b591e1074 6948149: G1: Imbalance in termination times
brutisso
parents: 2363
diff changeset
1110 double* data) {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1111 double min = data[0], max = data[0];
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1112 double total = 0.0;
2363
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents: 2188
diff changeset
1113 LineBuffer buf(level);
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents: 2188
diff changeset
1114 buf.append("[%s :", str);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1115 for (uint i = 0; i < ParallelGCThreads; ++i) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1116 double val = data[i];
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1117 if (val < min)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1118 min = val;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1119 if (val > max)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1120 max = val;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1121 total += val;
2363
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents: 2188
diff changeset
1122 buf.append(" %d", (int) val);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1123 }
2430
5c0b591e1074 6948149: G1: Imbalance in termination times
brutisso
parents: 2363
diff changeset
1124 buf.append_and_print_cr("");
5c0b591e1074 6948149: G1: Imbalance in termination times
brutisso
parents: 2363
diff changeset
1125 double avg = total / (double) ParallelGCThreads;
5c0b591e1074 6948149: G1: Imbalance in termination times
brutisso
parents: 2363
diff changeset
1126 buf.append_and_print_cr(" Sum: %d, Avg: %d, Min: %d, Max: %d, Diff: %d]",
5c0b591e1074 6948149: G1: Imbalance in termination times
brutisso
parents: 2363
diff changeset
1127 (int)total, (int)avg, (int)min, (int)max, (int)max - (int)min);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1128 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1129
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1130 void G1CollectorPolicy::print_stats (int level,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1131 const char* str,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1132 double value) {
2363
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents: 2188
diff changeset
1133 LineBuffer(level).append_and_print_cr("[%s: %5.1lf ms]", str, value);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1134 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1135
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1136 void G1CollectorPolicy::print_stats (int level,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1137 const char* str,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1138 int value) {
2363
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents: 2188
diff changeset
1139 LineBuffer(level).append_and_print_cr("[%s: %d]", str, value);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1140 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1141
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1142 double G1CollectorPolicy::avg_value (double* data) {
1833
8b10f48633dc 6984287: Regularize how GC parallel workers are specified.
jmasa
parents: 1779
diff changeset
1143 if (G1CollectedHeap::use_parallel_gc_threads()) {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1144 double ret = 0.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1145 for (uint i = 0; i < ParallelGCThreads; ++i)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1146 ret += data[i];
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1147 return ret / (double) ParallelGCThreads;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1148 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1149 return data[0];
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1150 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1151 }
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 double G1CollectorPolicy::max_value (double* data) {
1833
8b10f48633dc 6984287: Regularize how GC parallel workers are specified.
jmasa
parents: 1779
diff changeset
1154 if (G1CollectedHeap::use_parallel_gc_threads()) {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1155 double ret = data[0];
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1156 for (uint i = 1; i < ParallelGCThreads; ++i)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1157 if (data[i] > ret)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1158 ret = data[i];
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1159 return ret;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1160 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1161 return data[0];
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1162 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1163 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1164
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1165 double G1CollectorPolicy::sum_of_values (double* data) {
1833
8b10f48633dc 6984287: Regularize how GC parallel workers are specified.
jmasa
parents: 1779
diff changeset
1166 if (G1CollectedHeap::use_parallel_gc_threads()) {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1167 double sum = 0.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1168 for (uint i = 0; i < ParallelGCThreads; i++)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1169 sum += data[i];
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1170 return sum;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1171 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1172 return data[0];
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1173 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1174 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1175
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1176 double G1CollectorPolicy::max_sum (double* data1,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1177 double* data2) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1178 double ret = data1[0] + data2[0];
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1179
1833
8b10f48633dc 6984287: Regularize how GC parallel workers are specified.
jmasa
parents: 1779
diff changeset
1180 if (G1CollectedHeap::use_parallel_gc_threads()) {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1181 for (uint i = 1; i < ParallelGCThreads; ++i) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1182 double data = data1[i] + data2[i];
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1183 if (data > ret)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1184 ret = data;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1185 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1186 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1187 return ret;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1188 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1189
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1190 // Anything below that is considered to be zero
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1191 #define MIN_TIMER_GRANULARITY 0.0000001
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1192
1707
0ce1569c90e5 6963209: G1: remove the concept of abandoned pauses
tonyp
parents: 1705
diff changeset
1193 void G1CollectorPolicy::record_collection_pause_end() {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1194 double end_time_sec = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1195 double elapsed_ms = _last_pause_time_ms;
1833
8b10f48633dc 6984287: Regularize how GC parallel workers are specified.
jmasa
parents: 1779
diff changeset
1196 bool parallel = G1CollectedHeap::use_parallel_gc_threads();
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1197 size_t rs_size =
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1198 _cur_collection_pause_used_regions_at_start - collection_set_size();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1199 size_t cur_used_bytes = _g1->used();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1200 assert(cur_used_bytes == _g1->recalculate_used(), "It should!");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1201 bool last_pause_included_initial_mark = false;
1707
0ce1569c90e5 6963209: G1: remove the concept of abandoned pauses
tonyp
parents: 1705
diff changeset
1202 bool update_stats = !_g1->evacuation_failed();
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1203
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1204 #ifndef PRODUCT
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1205 if (G1YoungSurvRateVerbose) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1206 gclog_or_tty->print_cr("");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1207 _short_lived_surv_rate_group->print();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1208 // do that for any other surv rate groups too
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1209 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1210 #endif // PRODUCT
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1211
3867
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
1212 last_pause_included_initial_mark = during_initial_mark_pause();
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
1213 if (last_pause_included_initial_mark)
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
1214 record_concurrent_mark_init_end(0.0);
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
1215
3914
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
1216 size_t marking_initiating_used_threshold =
3867
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
1217 (_g1->capacity() / 100) * InitiatingHeapOccupancyPercent;
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
1218
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
1219 if (!_g1->mark_in_progress() && !_last_full_young_gc) {
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
1220 assert(!last_pause_included_initial_mark, "invariant");
3914
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
1221 if (cur_used_bytes > marking_initiating_used_threshold) {
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
1222 if (cur_used_bytes > _prev_collection_pause_used_at_end_bytes) {
1359
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
1223 assert(!during_initial_mark_pause(), "we should not see this here");
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
1224
3914
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
1225 ergo_verbose3(ErgoConcCycles,
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
1226 "request concurrent cycle initiation",
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
1227 ergo_format_reason("occupancy higher than threshold")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
1228 ergo_format_byte("occupancy")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
1229 ergo_format_byte_perc("threshold"),
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
1230 cur_used_bytes,
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
1231 marking_initiating_used_threshold,
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
1232 (double) InitiatingHeapOccupancyPercent);
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
1233
1359
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
1234 // Note: this might have already been set, if during the last
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
1235 // pause we decided to start a cycle but at the beginning of
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
1236 // this pause we decided to postpone it. That's OK.
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
1237 set_initiate_conc_mark_if_possible();
3914
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
1238 } else {
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
1239 ergo_verbose2(ErgoConcCycles,
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
1240 "do not request concurrent cycle initiation",
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
1241 ergo_format_reason("occupancy lower than previous occupancy")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
1242 ergo_format_byte("occupancy")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
1243 ergo_format_byte("previous occupancy"),
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
1244 cur_used_bytes,
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
1245 _prev_collection_pause_used_at_end_bytes);
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
1246 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1247 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1248 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1249
3867
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
1250 _prev_collection_pause_used_at_end_bytes = cur_used_bytes;
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
1251
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1252 _mmu_tracker->add_pause(end_time_sec - elapsed_ms/1000.0,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1253 end_time_sec, false);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1254
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1255 guarantee(_cur_collection_pause_used_regions_at_start >=
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1256 collection_set_size(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1257 "Negative RS size?");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1258
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1259 // This assert is exempted when we're doing parallel collection pauses,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1260 // because the fragmentation caused by the parallel GC allocation buffers
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1261 // can lead to more memory being used during collection than was used
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1262 // before. Best leave this out until the fragmentation problem is fixed.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1263 // Pauses in which evacuation failed can also lead to negative
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1264 // collections, since no space is reclaimed from a region containing an
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1265 // object whose evacuation failed.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1266 // Further, we're now always doing parallel collection. But I'm still
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1267 // leaving this here as a placeholder for a more precise assertion later.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1268 // (DLD, 10/05.)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1269 assert((true || parallel) // Always using GC LABs now.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1270 || _g1->evacuation_failed()
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1271 || _cur_collection_pause_used_at_start_bytes >= cur_used_bytes,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1272 "Negative collection");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1273
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1274 size_t freed_bytes =
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1275 _cur_collection_pause_used_at_start_bytes - cur_used_bytes;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1276 size_t surviving_bytes = _collection_set_bytes_used_before - freed_bytes;
1394
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
1277
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1278 double survival_fraction =
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1279 (double)surviving_bytes/
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1280 (double)_collection_set_bytes_used_before;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1281
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1282 _n_pauses++;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1283
3823
14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents: 3778
diff changeset
1284 double ext_root_scan_time = avg_value(_par_last_ext_root_scan_times_ms);
14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents: 3778
diff changeset
1285 double mark_stack_scan_time = avg_value(_par_last_mark_stack_scan_times_ms);
14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents: 3778
diff changeset
1286 double update_rs_time = avg_value(_par_last_update_rs_times_ms);
14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents: 3778
diff changeset
1287 double update_rs_processed_buffers =
14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents: 3778
diff changeset
1288 sum_of_values(_par_last_update_rs_processed_buffers);
14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents: 3778
diff changeset
1289 double scan_rs_time = avg_value(_par_last_scan_rs_times_ms);
14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents: 3778
diff changeset
1290 double obj_copy_time = avg_value(_par_last_obj_copy_times_ms);
14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents: 3778
diff changeset
1291 double termination_time = avg_value(_par_last_termination_times_ms);
14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents: 3778
diff changeset
1292
14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents: 3778
diff changeset
1293 double parallel_known_time = update_rs_time +
14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents: 3778
diff changeset
1294 ext_root_scan_time +
14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents: 3778
diff changeset
1295 mark_stack_scan_time +
14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents: 3778
diff changeset
1296 scan_rs_time +
14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents: 3778
diff changeset
1297 obj_copy_time +
14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents: 3778
diff changeset
1298 termination_time;
14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents: 3778
diff changeset
1299
14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents: 3778
diff changeset
1300 double parallel_other_time = _cur_collection_par_time_ms - parallel_known_time;
14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents: 3778
diff changeset
1301
14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents: 3778
diff changeset
1302 PauseSummary* summary = _summary;
14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents: 3778
diff changeset
1303
595
3698e8f47799 6804746: G1: guarantee(variance() > -1.0,"variance should be >= 0") (due to evacuation failure)
tonyp
parents: 547
diff changeset
1304 if (update_stats) {
3823
14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents: 3778
diff changeset
1305 _recent_rs_scan_times_ms->add(scan_rs_time);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1306 _recent_pause_times_ms->add(elapsed_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1307 _recent_rs_sizes->add(rs_size);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1308
3823
14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents: 3778
diff changeset
1309 MainBodySummary* body_summary = summary->main_body_summary();
14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents: 3778
diff changeset
1310 guarantee(body_summary != NULL, "should not be null!");
14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents: 3778
diff changeset
1311
14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents: 3778
diff changeset
1312 if (_satb_drain_time_set)
14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents: 3778
diff changeset
1313 body_summary->record_satb_drain_time_ms(_cur_satb_drain_time_ms);
14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents: 3778
diff changeset
1314 else
14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents: 3778
diff changeset
1315 body_summary->record_satb_drain_time_ms(0.0);
14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents: 3778
diff changeset
1316
14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents: 3778
diff changeset
1317 body_summary->record_ext_root_scan_time_ms(ext_root_scan_time);
14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents: 3778
diff changeset
1318 body_summary->record_mark_stack_scan_time_ms(mark_stack_scan_time);
14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents: 3778
diff changeset
1319 body_summary->record_update_rs_time_ms(update_rs_time);
14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents: 3778
diff changeset
1320 body_summary->record_scan_rs_time_ms(scan_rs_time);
14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents: 3778
diff changeset
1321 body_summary->record_obj_copy_time_ms(obj_copy_time);
14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents: 3778
diff changeset
1322 if (parallel) {
14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents: 3778
diff changeset
1323 body_summary->record_parallel_time_ms(_cur_collection_par_time_ms);
14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents: 3778
diff changeset
1324 body_summary->record_clear_ct_time_ms(_cur_clear_ct_time_ms);
14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents: 3778
diff changeset
1325 body_summary->record_termination_time_ms(termination_time);
14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents: 3778
diff changeset
1326 body_summary->record_parallel_other_time_ms(parallel_other_time);
14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents: 3778
diff changeset
1327 }
14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents: 3778
diff changeset
1328 body_summary->record_mark_closure_time_ms(_mark_closure_time_ms);
14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents: 3778
diff changeset
1329
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1330 // We exempt parallel collection from this check because Alloc Buffer
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1331 // fragmentation can produce negative collections. Same with evac
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1332 // failure.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1333 // Further, we're now always doing parallel collection. But I'm still
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1334 // leaving this here as a placeholder for a more precise assertion later.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1335 // (DLD, 10/05.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1336 assert((true || parallel)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1337 || _g1->evacuation_failed()
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1338 || surviving_bytes <= _collection_set_bytes_used_before,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1339 "Or else negative collection!");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1340 _recent_CS_bytes_used_before->add(_collection_set_bytes_used_before);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1341 _recent_CS_bytes_surviving->add(surviving_bytes);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1343 // this is where we update the allocation rate of the application
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1344 double app_time_ms =
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1345 (_cur_collection_start_sec * 1000.0 - _prev_collection_pause_end_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1346 if (app_time_ms < MIN_TIMER_GRANULARITY) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1347 // This usually happens due to the timer not having the required
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1348 // granularity. Some Linuxes are the usual culprits.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1349 // We'll just set it to something (arbitrarily) small.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1350 app_time_ms = 1.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1351 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1352 size_t regions_allocated =
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1353 (_region_num_young - _prev_region_num_young) +
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1354 (_region_num_tenured - _prev_region_num_tenured);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1355 double alloc_rate_ms = (double) regions_allocated / app_time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1356 _alloc_rate_ms_seq->add(alloc_rate_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1357 _prev_region_num_young = _region_num_young;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1358 _prev_region_num_tenured = _region_num_tenured;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1359
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1360 double interval_ms =
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1361 (end_time_sec - _recent_prev_end_times_for_all_gcs_sec->oldest()) * 1000.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1362 update_recent_gc_times(end_time_sec, elapsed_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1363 _recent_avg_pause_time_ratio = _recent_gc_times_ms->sum()/interval_ms;
1086
89f1b9ae8991 6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio()
ysr
parents: 1043
diff changeset
1364 if (recent_avg_pause_time_ratio() < 0.0 ||
89f1b9ae8991 6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio()
ysr
parents: 1043
diff changeset
1365 (recent_avg_pause_time_ratio() - 1.0 > 0.0)) {
89f1b9ae8991 6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio()
ysr
parents: 1043
diff changeset
1366 #ifndef PRODUCT
89f1b9ae8991 6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio()
ysr
parents: 1043
diff changeset
1367 // Dump info to allow post-facto debugging
89f1b9ae8991 6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio()
ysr
parents: 1043
diff changeset
1368 gclog_or_tty->print_cr("recent_avg_pause_time_ratio() out of bounds");
89f1b9ae8991 6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio()
ysr
parents: 1043
diff changeset
1369 gclog_or_tty->print_cr("-------------------------------------------");
89f1b9ae8991 6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio()
ysr
parents: 1043
diff changeset
1370 gclog_or_tty->print_cr("Recent GC Times (ms):");
89f1b9ae8991 6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio()
ysr
parents: 1043
diff changeset
1371 _recent_gc_times_ms->dump();
89f1b9ae8991 6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio()
ysr
parents: 1043
diff changeset
1372 gclog_or_tty->print_cr("(End Time=%3.3f) Recent GC End Times (s):", end_time_sec);
89f1b9ae8991 6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio()
ysr
parents: 1043
diff changeset
1373 _recent_prev_end_times_for_all_gcs_sec->dump();
89f1b9ae8991 6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio()
ysr
parents: 1043
diff changeset
1374 gclog_or_tty->print_cr("GC = %3.3f, Interval = %3.3f, Ratio = %3.3f",
89f1b9ae8991 6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio()
ysr
parents: 1043
diff changeset
1375 _recent_gc_times_ms->sum(), interval_ms, recent_avg_pause_time_ratio());
1087
23b9a8d315fc 6902701: G1: protect debugging code related to 6898948 with a debug flag
ysr
parents: 1086
diff changeset
1376 // In debug mode, terminate the JVM if the user wants to debug at this point.
23b9a8d315fc 6902701: G1: protect debugging code related to 6898948 with a debug flag
ysr
parents: 1086
diff changeset
1377 assert(!G1FailOnFPError, "Debugging data for CR 6898948 has been dumped above");
23b9a8d315fc 6902701: G1: protect debugging code related to 6898948 with a debug flag
ysr
parents: 1086
diff changeset
1378 #endif // !PRODUCT
23b9a8d315fc 6902701: G1: protect debugging code related to 6898948 with a debug flag
ysr
parents: 1086
diff changeset
1379 // Clip ratio between 0.0 and 1.0, and continue. This will be fixed in
23b9a8d315fc 6902701: G1: protect debugging code related to 6898948 with a debug flag
ysr
parents: 1086
diff changeset
1380 // CR 6902692 by redoing the manner in which the ratio is incrementally computed.
1086
89f1b9ae8991 6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio()
ysr
parents: 1043
diff changeset
1381 if (_recent_avg_pause_time_ratio < 0.0) {
89f1b9ae8991 6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio()
ysr
parents: 1043
diff changeset
1382 _recent_avg_pause_time_ratio = 0.0;
89f1b9ae8991 6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio()
ysr
parents: 1043
diff changeset
1383 } else {
89f1b9ae8991 6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio()
ysr
parents: 1043
diff changeset
1384 assert(_recent_avg_pause_time_ratio - 1.0 > 0.0, "Ctl-point invariant");
89f1b9ae8991 6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio()
ysr
parents: 1043
diff changeset
1385 _recent_avg_pause_time_ratio = 1.0;
89f1b9ae8991 6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio()
ysr
parents: 1043
diff changeset
1386 }
89f1b9ae8991 6898948: G1: forensic instrumentation for out-of-bounds recent_avg_pause_time_ratio()
ysr
parents: 1043
diff changeset
1387 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1388 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1389
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1390 if (G1PolicyVerbose > 1) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1391 gclog_or_tty->print_cr(" Recording collection pause(%d)", _n_pauses);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1392 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1393
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1394 if (G1PolicyVerbose > 1) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1395 gclog_or_tty->print_cr(" ET: %10.6f ms (avg: %10.6f ms)\n"
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1396 " ET-RS: %10.6f ms (avg: %10.6f ms)\n"
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1397 " |RS|: " SIZE_FORMAT,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1398 elapsed_ms, recent_avg_time_for_pauses_ms(),
3823
14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents: 3778
diff changeset
1399 scan_rs_time, recent_avg_time_for_rs_scan_ms(),
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1400 rs_size);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1401
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1402 gclog_or_tty->print_cr(" Used at start: " SIZE_FORMAT"K"
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1403 " At end " SIZE_FORMAT "K\n"
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1404 " garbage : " SIZE_FORMAT "K"
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1405 " of " SIZE_FORMAT "K\n"
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1406 " survival : %6.2f%% (%6.2f%% avg)",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1407 _cur_collection_pause_used_at_start_bytes/K,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1408 _g1->used()/K, freed_bytes/K,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1409 _collection_set_bytes_used_before/K,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1410 survival_fraction*100.0,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1411 recent_avg_survival_fraction()*100.0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1412 gclog_or_tty->print_cr(" Recent %% gc pause time: %6.2f",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1413 recent_avg_pause_time_ratio() * 100.0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1414 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1415
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1416 double other_time_ms = elapsed_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1417
1707
0ce1569c90e5 6963209: G1: remove the concept of abandoned pauses
tonyp
parents: 1705
diff changeset
1418 if (_satb_drain_time_set) {
0ce1569c90e5 6963209: G1: remove the concept of abandoned pauses
tonyp
parents: 1705
diff changeset
1419 other_time_ms -= _cur_satb_drain_time_ms;
0ce1569c90e5 6963209: G1: remove the concept of abandoned pauses
tonyp
parents: 1705
diff changeset
1420 }
0ce1569c90e5 6963209: G1: remove the concept of abandoned pauses
tonyp
parents: 1705
diff changeset
1421
0ce1569c90e5 6963209: G1: remove the concept of abandoned pauses
tonyp
parents: 1705
diff changeset
1422 if (parallel) {
0ce1569c90e5 6963209: G1: remove the concept of abandoned pauses
tonyp
parents: 1705
diff changeset
1423 other_time_ms -= _cur_collection_par_time_ms + _cur_clear_ct_time_ms;
0ce1569c90e5 6963209: G1: remove the concept of abandoned pauses
tonyp
parents: 1705
diff changeset
1424 } else {
0ce1569c90e5 6963209: G1: remove the concept of abandoned pauses
tonyp
parents: 1705
diff changeset
1425 other_time_ms -=
0ce1569c90e5 6963209: G1: remove the concept of abandoned pauses
tonyp
parents: 1705
diff changeset
1426 update_rs_time +
0ce1569c90e5 6963209: G1: remove the concept of abandoned pauses
tonyp
parents: 1705
diff changeset
1427 ext_root_scan_time + mark_stack_scan_time +
0ce1569c90e5 6963209: G1: remove the concept of abandoned pauses
tonyp
parents: 1705
diff changeset
1428 scan_rs_time + obj_copy_time;
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1429 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1430
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1431 if (PrintGCDetails) {
1707
0ce1569c90e5 6963209: G1: remove the concept of abandoned pauses
tonyp
parents: 1705
diff changeset
1432 gclog_or_tty->print_cr("%s, %1.8lf secs]",
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1433 (last_pause_included_initial_mark) ? " (initial-mark)" : "",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1434 elapsed_ms / 1000.0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1435
1707
0ce1569c90e5 6963209: G1: remove the concept of abandoned pauses
tonyp
parents: 1705
diff changeset
1436 if (_satb_drain_time_set) {
0ce1569c90e5 6963209: G1: remove the concept of abandoned pauses
tonyp
parents: 1705
diff changeset
1437 print_stats(1, "SATB Drain Time", _cur_satb_drain_time_ms);
0ce1569c90e5 6963209: G1: remove the concept of abandoned pauses
tonyp
parents: 1705
diff changeset
1438 }
0ce1569c90e5 6963209: G1: remove the concept of abandoned pauses
tonyp
parents: 1705
diff changeset
1439 if (_last_satb_drain_processed_buffers >= 0) {
0ce1569c90e5 6963209: G1: remove the concept of abandoned pauses
tonyp
parents: 1705
diff changeset
1440 print_stats(2, "Processed Buffers", _last_satb_drain_processed_buffers);
0ce1569c90e5 6963209: G1: remove the concept of abandoned pauses
tonyp
parents: 1705
diff changeset
1441 }
0ce1569c90e5 6963209: G1: remove the concept of abandoned pauses
tonyp
parents: 1705
diff changeset
1442 if (parallel) {
0ce1569c90e5 6963209: G1: remove the concept of abandoned pauses
tonyp
parents: 1705
diff changeset
1443 print_stats(1, "Parallel Time", _cur_collection_par_time_ms);
2430
5c0b591e1074 6948149: G1: Imbalance in termination times
brutisso
parents: 2363
diff changeset
1444 print_par_stats(2, "GC Worker Start Time", _par_last_gc_worker_start_times_ms);
1707
0ce1569c90e5 6963209: G1: remove the concept of abandoned pauses
tonyp
parents: 1705
diff changeset
1445 print_par_stats(2, "Update RS", _par_last_update_rs_times_ms);
2430
5c0b591e1074 6948149: G1: Imbalance in termination times
brutisso
parents: 2363
diff changeset
1446 print_par_sizes(3, "Processed Buffers", _par_last_update_rs_processed_buffers);
5c0b591e1074 6948149: G1: Imbalance in termination times
brutisso
parents: 2363
diff changeset
1447 print_par_stats(2, "Ext Root Scanning", _par_last_ext_root_scan_times_ms);
5c0b591e1074 6948149: G1: Imbalance in termination times
brutisso
parents: 2363
diff changeset
1448 print_par_stats(2, "Mark Stack Scanning", _par_last_mark_stack_scan_times_ms);
1707
0ce1569c90e5 6963209: G1: remove the concept of abandoned pauses
tonyp
parents: 1705
diff changeset
1449 print_par_stats(2, "Scan RS", _par_last_scan_rs_times_ms);
0ce1569c90e5 6963209: G1: remove the concept of abandoned pauses
tonyp
parents: 1705
diff changeset
1450 print_par_stats(2, "Object Copy", _par_last_obj_copy_times_ms);
0ce1569c90e5 6963209: G1: remove the concept of abandoned pauses
tonyp
parents: 1705
diff changeset
1451 print_par_stats(2, "Termination", _par_last_termination_times_ms);
2430
5c0b591e1074 6948149: G1: Imbalance in termination times
brutisso
parents: 2363
diff changeset
1452 print_par_sizes(3, "Termination Attempts", _par_last_termination_attempts);
5c0b591e1074 6948149: G1: Imbalance in termination times
brutisso
parents: 2363
diff changeset
1453 print_par_stats(2, "GC Worker End Time", _par_last_gc_worker_end_times_ms);
5c0b591e1074 6948149: G1: Imbalance in termination times
brutisso
parents: 2363
diff changeset
1454
5c0b591e1074 6948149: G1: Imbalance in termination times
brutisso
parents: 2363
diff changeset
1455 for (int i = 0; i < _parallel_gc_threads; i++) {
5c0b591e1074 6948149: G1: Imbalance in termination times
brutisso
parents: 2363
diff changeset
1456 _par_last_gc_worker_times_ms[i] = _par_last_gc_worker_end_times_ms[i] - _par_last_gc_worker_start_times_ms[i];
5c0b591e1074 6948149: G1: Imbalance in termination times
brutisso
parents: 2363
diff changeset
1457 }
5c0b591e1074 6948149: G1: Imbalance in termination times
brutisso
parents: 2363
diff changeset
1458 print_par_stats(2, "GC Worker Times", _par_last_gc_worker_times_ms);
5c0b591e1074 6948149: G1: Imbalance in termination times
brutisso
parents: 2363
diff changeset
1459
3823
14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents: 3778
diff changeset
1460 print_stats(2, "Parallel Other", parallel_other_time);
1707
0ce1569c90e5 6963209: G1: remove the concept of abandoned pauses
tonyp
parents: 1705
diff changeset
1461 print_stats(1, "Clear CT", _cur_clear_ct_time_ms);
0ce1569c90e5 6963209: G1: remove the concept of abandoned pauses
tonyp
parents: 1705
diff changeset
1462 } else {
0ce1569c90e5 6963209: G1: remove the concept of abandoned pauses
tonyp
parents: 1705
diff changeset
1463 print_stats(1, "Update RS", update_rs_time);
0ce1569c90e5 6963209: G1: remove the concept of abandoned pauses
tonyp
parents: 1705
diff changeset
1464 print_stats(2, "Processed Buffers",
0ce1569c90e5 6963209: G1: remove the concept of abandoned pauses
tonyp
parents: 1705
diff changeset
1465 (int)update_rs_processed_buffers);
0ce1569c90e5 6963209: G1: remove the concept of abandoned pauses
tonyp
parents: 1705
diff changeset
1466 print_stats(1, "Ext Root Scanning", ext_root_scan_time);
0ce1569c90e5 6963209: G1: remove the concept of abandoned pauses
tonyp
parents: 1705
diff changeset
1467 print_stats(1, "Mark Stack Scanning", mark_stack_scan_time);
0ce1569c90e5 6963209: G1: remove the concept of abandoned pauses
tonyp
parents: 1705
diff changeset
1468 print_stats(1, "Scan RS", scan_rs_time);
0ce1569c90e5 6963209: G1: remove the concept of abandoned pauses
tonyp
parents: 1705
diff changeset
1469 print_stats(1, "Object Copying", obj_copy_time);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1470 }
890
6cb8e9df7174 6819077: G1: first GC thread coming late into the GC.
johnc
parents: 845
diff changeset
1471 #ifndef PRODUCT
6cb8e9df7174 6819077: G1: first GC thread coming late into the GC.
johnc
parents: 845
diff changeset
1472 print_stats(1, "Cur Clear CC", _cur_clear_cc_time_ms);
6cb8e9df7174 6819077: G1: first GC thread coming late into the GC.
johnc
parents: 845
diff changeset
1473 print_stats(1, "Cum Clear CC", _cum_clear_cc_time_ms);
6cb8e9df7174 6819077: G1: first GC thread coming late into the GC.
johnc
parents: 845
diff changeset
1474 print_stats(1, "Min Clear CC", _min_clear_cc_time_ms);
6cb8e9df7174 6819077: G1: first GC thread coming late into the GC.
johnc
parents: 845
diff changeset
1475 print_stats(1, "Max Clear CC", _max_clear_cc_time_ms);
6cb8e9df7174 6819077: G1: first GC thread coming late into the GC.
johnc
parents: 845
diff changeset
1476 if (_num_cc_clears > 0) {
6cb8e9df7174 6819077: G1: first GC thread coming late into the GC.
johnc
parents: 845
diff changeset
1477 print_stats(1, "Avg Clear CC", _cum_clear_cc_time_ms / ((double)_num_cc_clears));
6cb8e9df7174 6819077: G1: first GC thread coming late into the GC.
johnc
parents: 845
diff changeset
1478 }
6cb8e9df7174 6819077: G1: first GC thread coming late into the GC.
johnc
parents: 845
diff changeset
1479 #endif
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1480 print_stats(1, "Other", other_time_ms);
1394
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
1481 print_stats(2, "Choose CSet", _recorded_young_cset_choice_time_ms);
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
1482
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1483 for (int i = 0; i < _aux_num; ++i) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1484 if (_cur_aux_times_set[i]) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1485 char buffer[96];
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1486 sprintf(buffer, "Aux%d", i);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1487 print_stats(1, buffer, _cur_aux_times_ms[i]);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1488 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1489 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1490 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1491
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1492 _all_pause_times_ms->add(elapsed_ms);
648
2314b7336582 6820321: G1: Error: guarantee(check_nums(total, n, parts), "all seq lengths should match")
tonyp
parents: 640
diff changeset
1493 if (update_stats) {
2314b7336582 6820321: G1: Error: guarantee(check_nums(total, n, parts), "all seq lengths should match")
tonyp
parents: 640
diff changeset
1494 summary->record_total_time_ms(elapsed_ms);
2314b7336582 6820321: G1: Error: guarantee(check_nums(total, n, parts), "all seq lengths should match")
tonyp
parents: 640
diff changeset
1495 summary->record_other_time_ms(other_time_ms);
2314b7336582 6820321: G1: Error: guarantee(check_nums(total, n, parts), "all seq lengths should match")
tonyp
parents: 640
diff changeset
1496 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1497 for (int i = 0; i < _aux_num; ++i)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1498 if (_cur_aux_times_set[i])
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1499 _all_aux_times_ms[i].add(_cur_aux_times_ms[i]);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1500
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1501 // Reset marks-between-pauses counter.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1502 _n_marks_since_last_pause = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1503
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1504 // Update the efficiency-since-mark vars.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1505 double proc_ms = elapsed_ms * (double) _parallel_gc_threads;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1506 if (elapsed_ms < MIN_TIMER_GRANULARITY) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1507 // This usually happens due to the timer not having the required
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1508 // granularity. Some Linuxes are the usual culprits.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1509 // We'll just set it to something (arbitrarily) small.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1510 proc_ms = 1.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1511 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1512 double cur_efficiency = (double) freed_bytes / proc_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1513
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1514 bool new_in_marking_window = _in_marking_window;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1515 bool new_in_marking_window_im = false;
1359
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
1516 if (during_initial_mark_pause()) {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1517 new_in_marking_window = true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1518 new_in_marking_window_im = true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1519 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1520
3867
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
1521 if (_last_full_young_gc) {
3914
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
1522 ergo_verbose2(ErgoPartiallyYoungGCs,
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
1523 "start partially-young GCs",
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
1524 ergo_format_byte_perc("known garbage"),
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
1525 _known_garbage_bytes, _known_garbage_ratio * 100.0);
3867
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
1526 set_full_young_gcs(false);
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
1527 _last_full_young_gc = false;
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
1528 }
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
1529
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
1530 if ( !_last_young_gc_full ) {
3914
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
1531 if (_should_revert_to_full_young_gcs) {
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
1532 ergo_verbose2(ErgoPartiallyYoungGCs,
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
1533 "end partially-young GCs",
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
1534 ergo_format_reason("partially-young GCs end requested")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
1535 ergo_format_byte_perc("known garbage"),
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
1536 _known_garbage_bytes, _known_garbage_ratio * 100.0);
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
1537 set_full_young_gcs(true);
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
1538 } else if (_known_garbage_ratio < 0.05) {
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
1539 ergo_verbose3(ErgoPartiallyYoungGCs,
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
1540 "end partially-young GCs",
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
1541 ergo_format_reason("known garbage percent lower than threshold")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
1542 ergo_format_byte_perc("known garbage")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
1543 ergo_format_perc("threshold"),
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
1544 _known_garbage_bytes, _known_garbage_ratio * 100.0,
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
1545 0.05 * 100.0);
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
1546 set_full_young_gcs(true);
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
1547 } else if (adaptive_young_list_length() &&
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
1548 (get_gc_eff_factor() * cur_efficiency < predict_young_gc_eff())) {
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
1549 ergo_verbose5(ErgoPartiallyYoungGCs,
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
1550 "end partially-young GCs",
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
1551 ergo_format_reason("current GC efficiency lower than "
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
1552 "predicted fully-young GC efficiency")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
1553 ergo_format_double("GC efficiency factor")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
1554 ergo_format_double("current GC efficiency")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
1555 ergo_format_double("predicted fully-young GC efficiency")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
1556 ergo_format_byte_perc("known garbage"),
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
1557 get_gc_eff_factor(), cur_efficiency,
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
1558 predict_young_gc_eff(),
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
1559 _known_garbage_bytes, _known_garbage_ratio * 100.0);
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
1560 set_full_young_gcs(true);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1561 }
3867
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
1562 }
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
1563 _should_revert_to_full_young_gcs = false;
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
1564
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
1565 if (_last_young_gc_full && !_during_marking) {
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
1566 _young_gc_eff_seq->add(cur_efficiency);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1567 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1568
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1569 _short_lived_surv_rate_group->start_adding_regions();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1570 // do that for any other surv rate groupsx
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1571
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1572 // <NEW PREDICTION>
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1573
677
96b229c54d1e 6543938: G1: remove the concept of popularity
apetrusenko
parents: 648
diff changeset
1574 if (update_stats) {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1575 double pause_time_ms = elapsed_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1576
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1577 size_t diff = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1578 if (_max_pending_cards >= _pending_cards)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1579 diff = _max_pending_cards - _pending_cards;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1580 _pending_card_diff_seq->add((double) diff);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1581
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1582 double cost_per_card_ms = 0.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1583 if (_pending_cards > 0) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1584 cost_per_card_ms = update_rs_time / (double) _pending_cards;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1585 _cost_per_card_ms_seq->add(cost_per_card_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1586 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1587
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1588 size_t cards_scanned = _g1->cards_scanned();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1589
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1590 double cost_per_entry_ms = 0.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1591 if (cards_scanned > 10) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1592 cost_per_entry_ms = scan_rs_time / (double) cards_scanned;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1593 if (_last_young_gc_full)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1594 _cost_per_entry_ms_seq->add(cost_per_entry_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1595 else
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1596 _partially_young_cost_per_entry_ms_seq->add(cost_per_entry_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1597 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1598
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1599 if (_max_rs_lengths > 0) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1600 double cards_per_entry_ratio =
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1601 (double) cards_scanned / (double) _max_rs_lengths;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1602 if (_last_young_gc_full)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1603 _fully_young_cards_per_entry_ratio_seq->add(cards_per_entry_ratio);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1604 else
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1605 _partially_young_cards_per_entry_ratio_seq->add(cards_per_entry_ratio);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1606 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1607
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1608 size_t rs_length_diff = _max_rs_lengths - _recorded_rs_lengths;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1609 if (rs_length_diff >= 0)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1610 _rs_length_diff_seq->add((double) rs_length_diff);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1611
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1612 size_t copied_bytes = surviving_bytes;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1613 double cost_per_byte_ms = 0.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1614 if (copied_bytes > 0) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1615 cost_per_byte_ms = obj_copy_time / (double) copied_bytes;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1616 if (_in_marking_window)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1617 _cost_per_byte_ms_during_cm_seq->add(cost_per_byte_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1618 else
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1619 _cost_per_byte_ms_seq->add(cost_per_byte_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1620 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1621
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1622 double all_other_time_ms = pause_time_ms -
1394
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
1623 (update_rs_time + scan_rs_time + obj_copy_time +
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1624 _mark_closure_time_ms + termination_time);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1625
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1626 double young_other_time_ms = 0.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1627 if (_recorded_young_regions > 0) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1628 young_other_time_ms =
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1629 _recorded_young_cset_choice_time_ms +
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1630 _recorded_young_free_cset_time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1631 _young_other_cost_per_region_ms_seq->add(young_other_time_ms /
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1632 (double) _recorded_young_regions);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1633 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1634 double non_young_other_time_ms = 0.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1635 if (_recorded_non_young_regions > 0) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1636 non_young_other_time_ms =
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1637 _recorded_non_young_cset_choice_time_ms +
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1638 _recorded_non_young_free_cset_time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1639
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1640 _non_young_other_cost_per_region_ms_seq->add(non_young_other_time_ms /
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1641 (double) _recorded_non_young_regions);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1642 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1643
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1644 double constant_other_time_ms = all_other_time_ms -
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1645 (young_other_time_ms + non_young_other_time_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1646 _constant_other_time_ms_seq->add(constant_other_time_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1647
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1648 double survival_ratio = 0.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1649 if (_bytes_in_collection_set_before_gc > 0) {
3830
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents: 3823
diff changeset
1650 survival_ratio = (double) _bytes_copied_during_gc /
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents: 3823
diff changeset
1651 (double) _bytes_in_collection_set_before_gc;
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1652 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1653
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1654 _pending_cards_seq->add((double) _pending_cards);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1655 _scanned_cards_seq->add((double) cards_scanned);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1656 _rs_lengths_seq->add((double) _max_rs_lengths);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1657
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1658 double expensive_region_limit_ms =
751
20c6f43950b5 6490395: G1: Tidy up command line flags.
johnc
parents: 677
diff changeset
1659 (double) MaxGCPauseMillis - predict_constant_other_time_ms();
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1660 if (expensive_region_limit_ms < 0.0) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1661 // this means that the other time was predicted to be longer than
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1662 // than the max pause time
751
20c6f43950b5 6490395: G1: Tidy up command line flags.
johnc
parents: 677
diff changeset
1663 expensive_region_limit_ms = (double) MaxGCPauseMillis;
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1664 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1665 _expensive_region_limit_ms = expensive_region_limit_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1666
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1667 if (PREDICTIONS_VERBOSE) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1668 gclog_or_tty->print_cr("");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1669 gclog_or_tty->print_cr("PREDICTIONS %1.4lf %d "
1394
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
1670 "REGIONS %d %d %d "
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1671 "PENDING_CARDS %d %d "
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1672 "CARDS_SCANNED %d %d "
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1673 "RS_LENGTHS %d %d "
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1674 "RS_UPDATE %1.6lf %1.6lf RS_SCAN %1.6lf %1.6lf "
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1675 "SURVIVAL_RATIO %1.6lf %1.6lf "
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1676 "OBJECT_COPY %1.6lf %1.6lf OTHER_CONSTANT %1.6lf %1.6lf "
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1677 "OTHER_YOUNG %1.6lf %1.6lf "
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1678 "OTHER_NON_YOUNG %1.6lf %1.6lf "
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1679 "VTIME_DIFF %1.6lf TERMINATION %1.6lf "
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1680 "ELAPSED %1.6lf %1.6lf ",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1681 _cur_collection_start_sec,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1682 (!_last_young_gc_full) ? 2 :
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1683 (last_pause_included_initial_mark) ? 1 : 0,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1684 _recorded_region_num,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1685 _recorded_young_regions,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1686 _recorded_non_young_regions,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1687 _predicted_pending_cards, _pending_cards,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1688 _predicted_cards_scanned, cards_scanned,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1689 _predicted_rs_lengths, _max_rs_lengths,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1690 _predicted_rs_update_time_ms, update_rs_time,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1691 _predicted_rs_scan_time_ms, scan_rs_time,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1692 _predicted_survival_ratio, survival_ratio,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1693 _predicted_object_copy_time_ms, obj_copy_time,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1694 _predicted_constant_other_time_ms, constant_other_time_ms,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1695 _predicted_young_other_time_ms, young_other_time_ms,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1696 _predicted_non_young_other_time_ms,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1697 non_young_other_time_ms,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1698 _vtime_diff_ms, termination_time,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1699 _predicted_pause_time_ms, elapsed_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1700 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1701
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1702 if (G1PolicyVerbose > 0) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1703 gclog_or_tty->print_cr("Pause Time, predicted: %1.4lfms (predicted %s), actual: %1.4lfms",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1704 _predicted_pause_time_ms,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1705 (_within_target) ? "within" : "outside",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1706 elapsed_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1707 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1708
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1709 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1710
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1711 _in_marking_window = new_in_marking_window;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1712 _in_marking_window_im = new_in_marking_window_im;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1713 _free_regions_at_end_of_collection = _g1->free_regions();
3919
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
1714 update_young_list_target_length();
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1715
1111
44f61c24ddab 6862387: tune concurrent refinement further
iveresov
parents: 1088
diff changeset
1716 // Note that _mmu_tracker->max_gc_time() returns the time in seconds.
1282
b81f3572f355 6928059: G1: command line parameter renaming
tonyp
parents: 1261
diff changeset
1717 double update_rs_time_goal_ms = _mmu_tracker->max_gc_time() * MILLIUNITS * G1RSetUpdatingPauseTimePercent / 100.0;
1111
44f61c24ddab 6862387: tune concurrent refinement further
iveresov
parents: 1088
diff changeset
1718 adjust_concurrent_refinement(update_rs_time, update_rs_processed_buffers, update_rs_time_goal_ms);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1719 // </NEW PREDICTION>
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1720 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1721
3764
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents: 2430
diff changeset
1722 #define EXT_SIZE_FORMAT "%d%s"
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents: 2430
diff changeset
1723 #define EXT_SIZE_PARAMS(bytes) \
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents: 2430
diff changeset
1724 byte_size_in_proper_unit((bytes)), \
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents: 2430
diff changeset
1725 proper_unit_for_byte_size((bytes))
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents: 2430
diff changeset
1726
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents: 2430
diff changeset
1727 void G1CollectorPolicy::print_heap_transition() {
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents: 2430
diff changeset
1728 if (PrintGCDetails) {
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents: 2430
diff changeset
1729 YoungList* young_list = _g1->young_list();
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents: 2430
diff changeset
1730 size_t eden_bytes = young_list->eden_used_bytes();
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents: 2430
diff changeset
1731 size_t survivor_bytes = young_list->survivor_used_bytes();
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents: 2430
diff changeset
1732 size_t used_before_gc = _cur_collection_pause_used_at_start_bytes;
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents: 2430
diff changeset
1733 size_t used = _g1->used();
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents: 2430
diff changeset
1734 size_t capacity = _g1->capacity();
3920
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds
brutisso
parents: 3919
diff changeset
1735 size_t eden_capacity =
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds
brutisso
parents: 3919
diff changeset
1736 (_young_list_target_length * HeapRegion::GrainBytes) - survivor_bytes;
3764
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents: 2430
diff changeset
1737
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents: 2430
diff changeset
1738 gclog_or_tty->print_cr(
3920
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds
brutisso
parents: 3919
diff changeset
1739 " [Eden: "EXT_SIZE_FORMAT"("EXT_SIZE_FORMAT")->"EXT_SIZE_FORMAT"("EXT_SIZE_FORMAT") "
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds
brutisso
parents: 3919
diff changeset
1740 "Survivors: "EXT_SIZE_FORMAT"->"EXT_SIZE_FORMAT" "
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds
brutisso
parents: 3919
diff changeset
1741 "Heap: "EXT_SIZE_FORMAT"("EXT_SIZE_FORMAT")->"
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds
brutisso
parents: 3919
diff changeset
1742 EXT_SIZE_FORMAT"("EXT_SIZE_FORMAT")]",
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds
brutisso
parents: 3919
diff changeset
1743 EXT_SIZE_PARAMS(_eden_bytes_before_gc),
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds
brutisso
parents: 3919
diff changeset
1744 EXT_SIZE_PARAMS(_prev_eden_capacity),
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds
brutisso
parents: 3919
diff changeset
1745 EXT_SIZE_PARAMS(eden_bytes),
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds
brutisso
parents: 3919
diff changeset
1746 EXT_SIZE_PARAMS(eden_capacity),
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds
brutisso
parents: 3919
diff changeset
1747 EXT_SIZE_PARAMS(_survivor_bytes_before_gc),
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds
brutisso
parents: 3919
diff changeset
1748 EXT_SIZE_PARAMS(survivor_bytes),
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds
brutisso
parents: 3919
diff changeset
1749 EXT_SIZE_PARAMS(used_before_gc),
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds
brutisso
parents: 3919
diff changeset
1750 EXT_SIZE_PARAMS(_capacity_before_gc),
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds
brutisso
parents: 3919
diff changeset
1751 EXT_SIZE_PARAMS(used),
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds
brutisso
parents: 3919
diff changeset
1752 EXT_SIZE_PARAMS(capacity));
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds
brutisso
parents: 3919
diff changeset
1753
af2ab04e0038 6929868: G1: introduce min / max young gen size bounds
brutisso
parents: 3919
diff changeset
1754 _prev_eden_capacity = eden_capacity;
3764
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents: 2430
diff changeset
1755 } else if (PrintGC) {
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents: 2430
diff changeset
1756 _g1->print_size_transition(gclog_or_tty,
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents: 2430
diff changeset
1757 _cur_collection_pause_used_at_start_bytes,
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents: 2430
diff changeset
1758 _g1->used(), _g1->capacity());
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents: 2430
diff changeset
1759 }
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents: 2430
diff changeset
1760 }
053d84a76d3d 7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents: 2430
diff changeset
1761
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1762 // <NEW PREDICTION>
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1763
1111
44f61c24ddab 6862387: tune concurrent refinement further
iveresov
parents: 1088
diff changeset
1764 void G1CollectorPolicy::adjust_concurrent_refinement(double update_rs_time,
44f61c24ddab 6862387: tune concurrent refinement further
iveresov
parents: 1088
diff changeset
1765 double update_rs_processed_buffers,
44f61c24ddab 6862387: tune concurrent refinement further
iveresov
parents: 1088
diff changeset
1766 double goal_ms) {
44f61c24ddab 6862387: tune concurrent refinement further
iveresov
parents: 1088
diff changeset
1767 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set();
44f61c24ddab 6862387: tune concurrent refinement further
iveresov
parents: 1088
diff changeset
1768 ConcurrentG1Refine *cg1r = G1CollectedHeap::heap()->concurrent_g1_refine();
44f61c24ddab 6862387: tune concurrent refinement further
iveresov
parents: 1088
diff changeset
1769
1282
b81f3572f355 6928059: G1: command line parameter renaming
tonyp
parents: 1261
diff changeset
1770 if (G1UseAdaptiveConcRefinement) {
1111
44f61c24ddab 6862387: tune concurrent refinement further
iveresov
parents: 1088
diff changeset
1771 const int k_gy = 3, k_gr = 6;
44f61c24ddab 6862387: tune concurrent refinement further
iveresov
parents: 1088
diff changeset
1772 const double inc_k = 1.1, dec_k = 0.9;
44f61c24ddab 6862387: tune concurrent refinement further
iveresov
parents: 1088
diff changeset
1773
44f61c24ddab 6862387: tune concurrent refinement further
iveresov
parents: 1088
diff changeset
1774 int g = cg1r->green_zone();
44f61c24ddab 6862387: tune concurrent refinement further
iveresov
parents: 1088
diff changeset
1775 if (update_rs_time > goal_ms) {
44f61c24ddab 6862387: tune concurrent refinement further
iveresov
parents: 1088
diff changeset
1776 g = (int)(g * dec_k); // Can become 0, that's OK. That would mean a mutator-only processing.
44f61c24ddab 6862387: tune concurrent refinement further
iveresov
parents: 1088
diff changeset
1777 } else {
44f61c24ddab 6862387: tune concurrent refinement further
iveresov
parents: 1088
diff changeset
1778 if (update_rs_time < goal_ms && update_rs_processed_buffers > g) {
44f61c24ddab 6862387: tune concurrent refinement further
iveresov
parents: 1088
diff changeset
1779 g = (int)MAX2(g * inc_k, g + 1.0);
44f61c24ddab 6862387: tune concurrent refinement further
iveresov
parents: 1088
diff changeset
1780 }
44f61c24ddab 6862387: tune concurrent refinement further
iveresov
parents: 1088
diff changeset
1781 }
44f61c24ddab 6862387: tune concurrent refinement further
iveresov
parents: 1088
diff changeset
1782 // Change the refinement threads params
44f61c24ddab 6862387: tune concurrent refinement further
iveresov
parents: 1088
diff changeset
1783 cg1r->set_green_zone(g);
44f61c24ddab 6862387: tune concurrent refinement further
iveresov
parents: 1088
diff changeset
1784 cg1r->set_yellow_zone(g * k_gy);
44f61c24ddab 6862387: tune concurrent refinement further
iveresov
parents: 1088
diff changeset
1785 cg1r->set_red_zone(g * k_gr);
44f61c24ddab 6862387: tune concurrent refinement further
iveresov
parents: 1088
diff changeset
1786 cg1r->reinitialize_threads();
44f61c24ddab 6862387: tune concurrent refinement further
iveresov
parents: 1088
diff changeset
1787
44f61c24ddab 6862387: tune concurrent refinement further
iveresov
parents: 1088
diff changeset
1788 int processing_threshold_delta = MAX2((int)(cg1r->green_zone() * sigma()), 1);
44f61c24ddab 6862387: tune concurrent refinement further
iveresov
parents: 1088
diff changeset
1789 int processing_threshold = MIN2(cg1r->green_zone() + processing_threshold_delta,
44f61c24ddab 6862387: tune concurrent refinement further
iveresov
parents: 1088
diff changeset
1790 cg1r->yellow_zone());
44f61c24ddab 6862387: tune concurrent refinement further
iveresov
parents: 1088
diff changeset
1791 // Change the barrier params
44f61c24ddab 6862387: tune concurrent refinement further
iveresov
parents: 1088
diff changeset
1792 dcqs.set_process_completed_threshold(processing_threshold);
44f61c24ddab 6862387: tune concurrent refinement further
iveresov
parents: 1088
diff changeset
1793 dcqs.set_max_completed_queue(cg1r->red_zone());
44f61c24ddab 6862387: tune concurrent refinement further
iveresov
parents: 1088
diff changeset
1794 }
44f61c24ddab 6862387: tune concurrent refinement further
iveresov
parents: 1088
diff changeset
1795
44f61c24ddab 6862387: tune concurrent refinement further
iveresov
parents: 1088
diff changeset
1796 int curr_queue_size = dcqs.completed_buffers_num();
44f61c24ddab 6862387: tune concurrent refinement further
iveresov
parents: 1088
diff changeset
1797 if (curr_queue_size >= cg1r->yellow_zone()) {
44f61c24ddab 6862387: tune concurrent refinement further
iveresov
parents: 1088
diff changeset
1798 dcqs.set_completed_queue_padding(curr_queue_size);
44f61c24ddab 6862387: tune concurrent refinement further
iveresov
parents: 1088
diff changeset
1799 } else {
44f61c24ddab 6862387: tune concurrent refinement further
iveresov
parents: 1088
diff changeset
1800 dcqs.set_completed_queue_padding(0);
44f61c24ddab 6862387: tune concurrent refinement further
iveresov
parents: 1088
diff changeset
1801 }
44f61c24ddab 6862387: tune concurrent refinement further
iveresov
parents: 1088
diff changeset
1802 dcqs.notify_if_necessary();
44f61c24ddab 6862387: tune concurrent refinement further
iveresov
parents: 1088
diff changeset
1803 }
44f61c24ddab 6862387: tune concurrent refinement further
iveresov
parents: 1088
diff changeset
1804
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1805 double
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1806 G1CollectorPolicy::
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1807 predict_young_collection_elapsed_time_ms(size_t adjustment) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1808 guarantee( adjustment == 0 || adjustment == 1, "invariant" );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1809
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1810 G1CollectedHeap* g1h = G1CollectedHeap::heap();
1394
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
1811 size_t young_num = g1h->young_list()->length();
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1812 if (young_num == 0)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1813 return 0.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1814
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1815 young_num += adjustment;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1816 size_t pending_cards = predict_pending_cards();
1394
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
1817 size_t rs_lengths = g1h->young_list()->sampled_rs_lengths() +
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1818 predict_rs_length_diff();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1819 size_t card_num;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1820 if (full_young_gcs())
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1821 card_num = predict_young_card_num(rs_lengths);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1822 else
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1823 card_num = predict_non_young_card_num(rs_lengths);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1824 size_t young_byte_size = young_num * HeapRegion::GrainBytes;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1825 double accum_yg_surv_rate =
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1826 _short_lived_surv_rate_group->accum_surv_rate(adjustment);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1827
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1828 size_t bytes_to_copy =
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1829 (size_t) (accum_yg_surv_rate * (double) HeapRegion::GrainBytes);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1830
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1831 return
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1832 predict_rs_update_time_ms(pending_cards) +
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1833 predict_rs_scan_time_ms(card_num) +
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1834 predict_object_copy_time_ms(bytes_to_copy) +
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1835 predict_young_other_time_ms(young_num) +
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1836 predict_constant_other_time_ms();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1837 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1838
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1839 double
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1840 G1CollectorPolicy::predict_base_elapsed_time_ms(size_t pending_cards) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1841 size_t rs_length = predict_rs_length_diff();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1842 size_t card_num;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1843 if (full_young_gcs())
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1844 card_num = predict_young_card_num(rs_length);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1845 else
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1846 card_num = predict_non_young_card_num(rs_length);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1847 return predict_base_elapsed_time_ms(pending_cards, card_num);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1848 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1849
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1850 double
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1851 G1CollectorPolicy::predict_base_elapsed_time_ms(size_t pending_cards,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1852 size_t scanned_cards) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1853 return
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1854 predict_rs_update_time_ms(pending_cards) +
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1855 predict_rs_scan_time_ms(scanned_cards) +
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1856 predict_constant_other_time_ms();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1857 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1858
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1859 double
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1860 G1CollectorPolicy::predict_region_elapsed_time_ms(HeapRegion* hr,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1861 bool young) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1862 size_t rs_length = hr->rem_set()->occupied();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1863 size_t card_num;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1864 if (full_young_gcs())
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1865 card_num = predict_young_card_num(rs_length);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1866 else
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1867 card_num = predict_non_young_card_num(rs_length);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1868 size_t bytes_to_copy = predict_bytes_to_copy(hr);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1869
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1870 double region_elapsed_time_ms =
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1871 predict_rs_scan_time_ms(card_num) +
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1872 predict_object_copy_time_ms(bytes_to_copy);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1873
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1874 if (young)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1875 region_elapsed_time_ms += predict_young_other_time_ms(1);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1876 else
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1877 region_elapsed_time_ms += predict_non_young_other_time_ms(1);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1878
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1879 return region_elapsed_time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1880 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1881
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1882 size_t
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1883 G1CollectorPolicy::predict_bytes_to_copy(HeapRegion* hr) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1884 size_t bytes_to_copy;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1885 if (hr->is_marked())
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1886 bytes_to_copy = hr->max_live_bytes();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1887 else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1888 guarantee( hr->is_young() && hr->age_in_surv_rate_group() != -1,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1889 "invariant" );
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1890 int age = hr->age_in_surv_rate_group();
545
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 526
diff changeset
1891 double yg_surv_rate = predict_yg_surv_rate(age, hr->surv_rate_group());
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1892 bytes_to_copy = (size_t) ((double) hr->used() * yg_surv_rate);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1893 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1894
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1895 return bytes_to_copy;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1896 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1897
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1898 void
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1899 G1CollectorPolicy::start_recording_regions() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1900 _recorded_rs_lengths = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1901 _recorded_young_regions = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1902 _recorded_non_young_regions = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1903
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1904 #if PREDICTIONS_VERBOSE
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1905 _recorded_marked_bytes = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1906 _recorded_young_bytes = 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1907 _predicted_bytes_to_copy = 0;
1394
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
1908 _predicted_rs_lengths = 0;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
1909 _predicted_cards_scanned = 0;
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1910 #endif // PREDICTIONS_VERBOSE
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1911 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1912
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1913 void
1394
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
1914 G1CollectorPolicy::record_cset_region_info(HeapRegion* hr, bool young) {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1915 #if PREDICTIONS_VERBOSE
1394
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
1916 if (!young) {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1917 _recorded_marked_bytes += hr->max_live_bytes();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1918 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1919 _predicted_bytes_to_copy += predict_bytes_to_copy(hr);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1920 #endif // PREDICTIONS_VERBOSE
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1921
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1922 size_t rs_length = hr->rem_set()->occupied();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1923 _recorded_rs_lengths += rs_length;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1924 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1925
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1926 void
1394
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
1927 G1CollectorPolicy::record_non_young_cset_region(HeapRegion* hr) {
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
1928 assert(!hr->is_young(), "should not call this");
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
1929 ++_recorded_non_young_regions;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
1930 record_cset_region_info(hr, false);
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
1931 }
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
1932
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
1933 void
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
1934 G1CollectorPolicy::set_recorded_young_regions(size_t n_regions) {
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
1935 _recorded_young_regions = n_regions;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
1936 }
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
1937
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
1938 void G1CollectorPolicy::set_recorded_young_bytes(size_t bytes) {
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
1939 #if PREDICTIONS_VERBOSE
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
1940 _recorded_young_bytes = bytes;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
1941 #endif // PREDICTIONS_VERBOSE
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
1942 }
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
1943
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
1944 void G1CollectorPolicy::set_recorded_rs_lengths(size_t rs_lengths) {
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
1945 _recorded_rs_lengths = rs_lengths;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
1946 }
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
1947
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
1948 void G1CollectorPolicy::set_predicted_bytes_to_copy(size_t bytes) {
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
1949 _predicted_bytes_to_copy = bytes;
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1950 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1951
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1952 void
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1953 G1CollectorPolicy::end_recording_regions() {
1394
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
1954 // The _predicted_pause_time_ms field is referenced in code
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
1955 // not under PREDICTIONS_VERBOSE. Let's initialize it.
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
1956 _predicted_pause_time_ms = -1.0;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
1957
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1958 #if PREDICTIONS_VERBOSE
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1959 _predicted_pending_cards = predict_pending_cards();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1960 _predicted_rs_lengths = _recorded_rs_lengths + predict_rs_length_diff();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1961 if (full_young_gcs())
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1962 _predicted_cards_scanned += predict_young_card_num(_predicted_rs_lengths);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1963 else
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1964 _predicted_cards_scanned +=
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1965 predict_non_young_card_num(_predicted_rs_lengths);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1966 _recorded_region_num = _recorded_young_regions + _recorded_non_young_regions;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1967
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1968 _predicted_rs_update_time_ms =
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1969 predict_rs_update_time_ms(_g1->pending_card_num());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1970 _predicted_rs_scan_time_ms =
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1971 predict_rs_scan_time_ms(_predicted_cards_scanned);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1972 _predicted_object_copy_time_ms =
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1973 predict_object_copy_time_ms(_predicted_bytes_to_copy);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1974 _predicted_constant_other_time_ms =
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1975 predict_constant_other_time_ms();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1976 _predicted_young_other_time_ms =
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1977 predict_young_other_time_ms(_recorded_young_regions);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1978 _predicted_non_young_other_time_ms =
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1979 predict_non_young_other_time_ms(_recorded_non_young_regions);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1980
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1981 _predicted_pause_time_ms =
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1982 _predicted_rs_update_time_ms +
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1983 _predicted_rs_scan_time_ms +
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1984 _predicted_object_copy_time_ms +
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1985 _predicted_constant_other_time_ms +
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1986 _predicted_young_other_time_ms +
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1987 _predicted_non_young_other_time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1988 #endif // PREDICTIONS_VERBOSE
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1989 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1990
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1991 void G1CollectorPolicy::check_if_region_is_too_expensive(double
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1992 predicted_time_ms) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1993 // I don't think we need to do this when in young GC mode since
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1994 // marking will be initiated next time we hit the soft limit anyway...
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
1995 if (predicted_time_ms > _expensive_region_limit_ms) {
3914
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
1996 ergo_verbose2(ErgoPartiallyYoungGCs,
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
1997 "request partially-young GCs end",
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
1998 ergo_format_reason("predicted region time higher than threshold")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
1999 ergo_format_ms("predicted region time")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2000 ergo_format_ms("threshold"),
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2001 predicted_time_ms, _expensive_region_limit_ms);
3867
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
2002 // no point in doing another partial one
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
2003 _should_revert_to_full_young_gcs = true;
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2004 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2005 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2006
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2007 // </NEW PREDICTION>
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2008
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2009
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2010 void G1CollectorPolicy::update_recent_gc_times(double end_time_sec,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2011 double elapsed_ms) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2012 _recent_gc_times_ms->add(elapsed_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2013 _recent_prev_end_times_for_all_gcs_sec->add(end_time_sec);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2014 _prev_collection_pause_end_ms = end_time_sec * 1000.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2015 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2016
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2017 double G1CollectorPolicy::recent_avg_time_for_pauses_ms() {
3823
14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents: 3778
diff changeset
2018 if (_recent_pause_times_ms->num() == 0) {
14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents: 3778
diff changeset
2019 return (double) MaxGCPauseMillis;
14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents: 3778
diff changeset
2020 }
14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents: 3778
diff changeset
2021 return _recent_pause_times_ms->avg();
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2022 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2023
3823
14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents: 3778
diff changeset
2024 double G1CollectorPolicy::recent_avg_time_for_rs_scan_ms() {
14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents: 3778
diff changeset
2025 if (_recent_rs_scan_times_ms->num() == 0) {
751
20c6f43950b5 6490395: G1: Tidy up command line flags.
johnc
parents: 677
diff changeset
2026 return (double)MaxGCPauseMillis/3.0;
3823
14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents: 3778
diff changeset
2027 }
14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents: 3778
diff changeset
2028 return _recent_rs_scan_times_ms->avg();
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2029 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2030
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2031 int G1CollectorPolicy::number_of_recent_gcs() {
3823
14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents: 3778
diff changeset
2032 assert(_recent_rs_scan_times_ms->num() ==
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2033 _recent_pause_times_ms->num(), "Sequence out of sync");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2034 assert(_recent_pause_times_ms->num() ==
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2035 _recent_CS_bytes_used_before->num(), "Sequence out of sync");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2036 assert(_recent_CS_bytes_used_before->num() ==
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2037 _recent_CS_bytes_surviving->num(), "Sequence out of sync");
3823
14a2fd14c0db 7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents: 3778
diff changeset
2038
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2039 return _recent_pause_times_ms->num();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2040 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2041
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2042 double G1CollectorPolicy::recent_avg_survival_fraction() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2043 return recent_avg_survival_fraction_work(_recent_CS_bytes_surviving,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2044 _recent_CS_bytes_used_before);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2045 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2046
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2047 double G1CollectorPolicy::last_survival_fraction() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2048 return last_survival_fraction_work(_recent_CS_bytes_surviving,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2049 _recent_CS_bytes_used_before);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2050 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2051
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2052 double
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2053 G1CollectorPolicy::recent_avg_survival_fraction_work(TruncatedSeq* surviving,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2054 TruncatedSeq* before) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2055 assert(surviving->num() == before->num(), "Sequence out of sync");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2056 if (before->sum() > 0.0) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2057 double recent_survival_rate = surviving->sum() / before->sum();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2058 // We exempt parallel collection from this check because Alloc Buffer
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2059 // fragmentation can produce negative collections.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2060 // Further, we're now always doing parallel collection. But I'm still
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2061 // leaving this here as a placeholder for a more precise assertion later.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2062 // (DLD, 10/05.)
1833
8b10f48633dc 6984287: Regularize how GC parallel workers are specified.
jmasa
parents: 1779
diff changeset
2063 assert((true || G1CollectedHeap::use_parallel_gc_threads()) ||
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2064 _g1->evacuation_failed() ||
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2065 recent_survival_rate <= 1.0, "Or bad frac");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2066 return recent_survival_rate;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2067 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2068 return 1.0; // Be conservative.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2069 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2070 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2071
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2072 double
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2073 G1CollectorPolicy::last_survival_fraction_work(TruncatedSeq* surviving,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2074 TruncatedSeq* before) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2075 assert(surviving->num() == before->num(), "Sequence out of sync");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2076 if (surviving->num() > 0 && before->last() > 0.0) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2077 double last_survival_rate = surviving->last() / before->last();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2078 // We exempt parallel collection from this check because Alloc Buffer
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2079 // fragmentation can produce negative collections.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2080 // Further, we're now always doing parallel collection. But I'm still
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2081 // leaving this here as a placeholder for a more precise assertion later.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2082 // (DLD, 10/05.)
1833
8b10f48633dc 6984287: Regularize how GC parallel workers are specified.
jmasa
parents: 1779
diff changeset
2083 assert((true || G1CollectedHeap::use_parallel_gc_threads()) ||
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2084 last_survival_rate <= 1.0, "Or bad frac");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2085 return last_survival_rate;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2086 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2087 return 1.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2088 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2089 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2090
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2091 static const int survival_min_obs = 5;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2092 static double survival_min_obs_limits[] = { 0.9, 0.7, 0.5, 0.3, 0.1 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2093 static const double min_survival_rate = 0.1;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2094
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2095 double
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2096 G1CollectorPolicy::conservative_avg_survival_fraction_work(double avg,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2097 double latest) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2098 double res = avg;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2099 if (number_of_recent_gcs() < survival_min_obs) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2100 res = MAX2(res, survival_min_obs_limits[number_of_recent_gcs()]);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2101 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2102 res = MAX2(res, latest);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2103 res = MAX2(res, min_survival_rate);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2104 // In the parallel case, LAB fragmentation can produce "negative
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2105 // collections"; so can evac failure. Cap at 1.0
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2106 res = MIN2(res, 1.0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2107 return res;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2108 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2109
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2110 size_t G1CollectorPolicy::expansion_amount() {
3914
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2111 double recent_gc_overhead = recent_avg_pause_time_ratio() * 100.0;
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2112 double threshold = _gc_overhead_perc;
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2113 if (recent_gc_overhead > threshold) {
751
20c6f43950b5 6490395: G1: Tidy up command line flags.
johnc
parents: 677
diff changeset
2114 // We will double the existing space, or take
20c6f43950b5 6490395: G1: Tidy up command line flags.
johnc
parents: 677
diff changeset
2115 // G1ExpandByPercentOfAvailable % of the available expansion
20c6f43950b5 6490395: G1: Tidy up command line flags.
johnc
parents: 677
diff changeset
2116 // space, whichever is smaller, bounded below by a minimum
20c6f43950b5 6490395: G1: Tidy up command line flags.
johnc
parents: 677
diff changeset
2117 // expansion (unless that's all that's left.)
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2118 const size_t min_expand_bytes = 1*M;
2188
c33825b68624 6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents: 2152
diff changeset
2119 size_t reserved_bytes = _g1->max_capacity();
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2120 size_t committed_bytes = _g1->capacity();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2121 size_t uncommitted_bytes = reserved_bytes - committed_bytes;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2122 size_t expand_bytes;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2123 size_t expand_bytes_via_pct =
751
20c6f43950b5 6490395: G1: Tidy up command line flags.
johnc
parents: 677
diff changeset
2124 uncommitted_bytes * G1ExpandByPercentOfAvailable / 100;
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2125 expand_bytes = MIN2(expand_bytes_via_pct, committed_bytes);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2126 expand_bytes = MAX2(expand_bytes, min_expand_bytes);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2127 expand_bytes = MIN2(expand_bytes, uncommitted_bytes);
3914
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2128
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2129 ergo_verbose5(ErgoHeapSizing,
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2130 "attempt heap expansion",
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2131 ergo_format_reason("recent GC overhead higher than "
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2132 "threshold after GC")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2133 ergo_format_perc("recent GC overhead")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2134 ergo_format_perc("threshold")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2135 ergo_format_byte("uncommitted")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2136 ergo_format_byte_perc("calculated expansion amount"),
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2137 recent_gc_overhead, threshold,
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2138 uncommitted_bytes,
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2139 expand_bytes_via_pct, (double) G1ExpandByPercentOfAvailable);
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2140
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2141 return expand_bytes;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2142 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2143 return 0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2144 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2145 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2146
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2147 void G1CollectorPolicy::note_start_of_mark_thread() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2148 _mark_thread_startup_sec = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2149 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2150
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2151 class CountCSClosure: public HeapRegionClosure {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2152 G1CollectorPolicy* _g1_policy;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2153 public:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2154 CountCSClosure(G1CollectorPolicy* g1_policy) :
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2155 _g1_policy(g1_policy) {}
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2156 bool doHeapRegion(HeapRegion* r) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2157 _g1_policy->_bytes_in_collection_set_before_gc += r->used();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2158 return false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2159 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2160 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2161
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2162 void G1CollectorPolicy::count_CS_bytes_used() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2163 CountCSClosure cs_closure(this);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2164 _g1->collection_set_iterate(&cs_closure);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2165 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2166
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2167 void G1CollectorPolicy::print_summary (int level,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2168 const char* str,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2169 NumberSeq* seq) const {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2170 double sum = seq->sum();
2363
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents: 2188
diff changeset
2171 LineBuffer(level + 1).append_and_print_cr("%-24s = %8.2lf s (avg = %8.2lf ms)",
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2172 str, sum / 1000.0, seq->avg());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2173 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2174
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2175 void G1CollectorPolicy::print_summary_sd (int level,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2176 const char* str,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2177 NumberSeq* seq) const {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2178 print_summary(level, str, seq);
2363
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents: 2188
diff changeset
2179 LineBuffer(level + 6).append_and_print_cr("(num = %5d, std dev = %8.2lf ms, max = %8.2lf ms)",
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2180 seq->num(), seq->sd(), seq->maximum());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2181 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2182
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2183 void G1CollectorPolicy::check_other_times(int level,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2184 NumberSeq* other_times_ms,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2185 NumberSeq* calc_other_times_ms) const {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2186 bool should_print = false;
2363
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents: 2188
diff changeset
2187 LineBuffer buf(level + 2);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2188
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2189 double max_sum = MAX2(fabs(other_times_ms->sum()),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2190 fabs(calc_other_times_ms->sum()));
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2191 double min_sum = MIN2(fabs(other_times_ms->sum()),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2192 fabs(calc_other_times_ms->sum()));
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2193 double sum_ratio = max_sum / min_sum;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2194 if (sum_ratio > 1.1) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2195 should_print = true;
2363
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents: 2188
diff changeset
2196 buf.append_and_print_cr("## CALCULATED OTHER SUM DOESN'T MATCH RECORDED ###");
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2197 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2198
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2199 double max_avg = MAX2(fabs(other_times_ms->avg()),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2200 fabs(calc_other_times_ms->avg()));
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2201 double min_avg = MIN2(fabs(other_times_ms->avg()),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2202 fabs(calc_other_times_ms->avg()));
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2203 double avg_ratio = max_avg / min_avg;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2204 if (avg_ratio > 1.1) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2205 should_print = true;
2363
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents: 2188
diff changeset
2206 buf.append_and_print_cr("## CALCULATED OTHER AVG DOESN'T MATCH RECORDED ###");
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2207 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2208
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2209 if (other_times_ms->sum() < -0.01) {
2363
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents: 2188
diff changeset
2210 buf.append_and_print_cr("## RECORDED OTHER SUM IS NEGATIVE ###");
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2211 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2212
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2213 if (other_times_ms->avg() < -0.01) {
2363
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents: 2188
diff changeset
2214 buf.append_and_print_cr("## RECORDED OTHER AVG IS NEGATIVE ###");
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2215 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2216
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2217 if (calc_other_times_ms->sum() < -0.01) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2218 should_print = true;
2363
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents: 2188
diff changeset
2219 buf.append_and_print_cr("## CALCULATED OTHER SUM IS NEGATIVE ###");
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2220 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2221
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2222 if (calc_other_times_ms->avg() < -0.01) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2223 should_print = true;
2363
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents: 2188
diff changeset
2224 buf.append_and_print_cr("## CALCULATED OTHER AVG IS NEGATIVE ###");
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2225 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2226
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2227 if (should_print)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2228 print_summary(level, "Other(Calc)", calc_other_times_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2229 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2230
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2231 void G1CollectorPolicy::print_summary(PauseSummary* summary) const {
1833
8b10f48633dc 6984287: Regularize how GC parallel workers are specified.
jmasa
parents: 1779
diff changeset
2232 bool parallel = G1CollectedHeap::use_parallel_gc_threads();
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2233 MainBodySummary* body_summary = summary->main_body_summary();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2234 if (summary->get_total_seq()->num() > 0) {
677
96b229c54d1e 6543938: G1: remove the concept of popularity
apetrusenko
parents: 648
diff changeset
2235 print_summary_sd(0, "Evacuation Pauses", summary->get_total_seq());
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2236 if (body_summary != NULL) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2237 print_summary(1, "SATB Drain", body_summary->get_satb_drain_seq());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2238 if (parallel) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2239 print_summary(1, "Parallel Time", body_summary->get_parallel_seq());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2240 print_summary(2, "Update RS", body_summary->get_update_rs_seq());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2241 print_summary(2, "Ext Root Scanning",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2242 body_summary->get_ext_root_scan_seq());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2243 print_summary(2, "Mark Stack Scanning",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2244 body_summary->get_mark_stack_scan_seq());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2245 print_summary(2, "Scan RS", body_summary->get_scan_rs_seq());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2246 print_summary(2, "Object Copy", body_summary->get_obj_copy_seq());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2247 print_summary(2, "Termination", body_summary->get_termination_seq());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2248 print_summary(2, "Other", body_summary->get_parallel_other_seq());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2249 {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2250 NumberSeq* other_parts[] = {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2251 body_summary->get_update_rs_seq(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2252 body_summary->get_ext_root_scan_seq(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2253 body_summary->get_mark_stack_scan_seq(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2254 body_summary->get_scan_rs_seq(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2255 body_summary->get_obj_copy_seq(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2256 body_summary->get_termination_seq()
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2257 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2258 NumberSeq calc_other_times_ms(body_summary->get_parallel_seq(),
1779
6eddcbe17c83 6981746: G1: SEGV with -XX:+TraceGen0Time
johnc
parents: 1707
diff changeset
2259 6, other_parts);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2260 check_other_times(2, body_summary->get_parallel_other_seq(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2261 &calc_other_times_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2262 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2263 print_summary(1, "Mark Closure", body_summary->get_mark_closure_seq());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2264 print_summary(1, "Clear CT", body_summary->get_clear_ct_seq());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2265 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2266 print_summary(1, "Update RS", body_summary->get_update_rs_seq());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2267 print_summary(1, "Ext Root Scanning",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2268 body_summary->get_ext_root_scan_seq());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2269 print_summary(1, "Mark Stack Scanning",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2270 body_summary->get_mark_stack_scan_seq());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2271 print_summary(1, "Scan RS", body_summary->get_scan_rs_seq());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2272 print_summary(1, "Object Copy", body_summary->get_obj_copy_seq());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2273 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2274 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2275 print_summary(1, "Other", summary->get_other_seq());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2276 {
1779
6eddcbe17c83 6981746: G1: SEGV with -XX:+TraceGen0Time
johnc
parents: 1707
diff changeset
2277 if (body_summary != NULL) {
6eddcbe17c83 6981746: G1: SEGV with -XX:+TraceGen0Time
johnc
parents: 1707
diff changeset
2278 NumberSeq calc_other_times_ms;
6eddcbe17c83 6981746: G1: SEGV with -XX:+TraceGen0Time
johnc
parents: 1707
diff changeset
2279 if (parallel) {
6eddcbe17c83 6981746: G1: SEGV with -XX:+TraceGen0Time
johnc
parents: 1707
diff changeset
2280 // parallel
6eddcbe17c83 6981746: G1: SEGV with -XX:+TraceGen0Time
johnc
parents: 1707
diff changeset
2281 NumberSeq* other_parts[] = {
6eddcbe17c83 6981746: G1: SEGV with -XX:+TraceGen0Time
johnc
parents: 1707
diff changeset
2282 body_summary->get_satb_drain_seq(),
6eddcbe17c83 6981746: G1: SEGV with -XX:+TraceGen0Time
johnc
parents: 1707
diff changeset
2283 body_summary->get_parallel_seq(),
6eddcbe17c83 6981746: G1: SEGV with -XX:+TraceGen0Time
johnc
parents: 1707
diff changeset
2284 body_summary->get_clear_ct_seq()
6eddcbe17c83 6981746: G1: SEGV with -XX:+TraceGen0Time
johnc
parents: 1707
diff changeset
2285 };
6eddcbe17c83 6981746: G1: SEGV with -XX:+TraceGen0Time
johnc
parents: 1707
diff changeset
2286 calc_other_times_ms = NumberSeq(summary->get_total_seq(),
6eddcbe17c83 6981746: G1: SEGV with -XX:+TraceGen0Time
johnc
parents: 1707
diff changeset
2287 3, other_parts);
6eddcbe17c83 6981746: G1: SEGV with -XX:+TraceGen0Time
johnc
parents: 1707
diff changeset
2288 } else {
6eddcbe17c83 6981746: G1: SEGV with -XX:+TraceGen0Time
johnc
parents: 1707
diff changeset
2289 // serial
6eddcbe17c83 6981746: G1: SEGV with -XX:+TraceGen0Time
johnc
parents: 1707
diff changeset
2290 NumberSeq* other_parts[] = {
6eddcbe17c83 6981746: G1: SEGV with -XX:+TraceGen0Time
johnc
parents: 1707
diff changeset
2291 body_summary->get_satb_drain_seq(),
6eddcbe17c83 6981746: G1: SEGV with -XX:+TraceGen0Time
johnc
parents: 1707
diff changeset
2292 body_summary->get_update_rs_seq(),
6eddcbe17c83 6981746: G1: SEGV with -XX:+TraceGen0Time
johnc
parents: 1707
diff changeset
2293 body_summary->get_ext_root_scan_seq(),
6eddcbe17c83 6981746: G1: SEGV with -XX:+TraceGen0Time
johnc
parents: 1707
diff changeset
2294 body_summary->get_mark_stack_scan_seq(),
6eddcbe17c83 6981746: G1: SEGV with -XX:+TraceGen0Time
johnc
parents: 1707
diff changeset
2295 body_summary->get_scan_rs_seq(),
6eddcbe17c83 6981746: G1: SEGV with -XX:+TraceGen0Time
johnc
parents: 1707
diff changeset
2296 body_summary->get_obj_copy_seq()
6eddcbe17c83 6981746: G1: SEGV with -XX:+TraceGen0Time
johnc
parents: 1707
diff changeset
2297 };
6eddcbe17c83 6981746: G1: SEGV with -XX:+TraceGen0Time
johnc
parents: 1707
diff changeset
2298 calc_other_times_ms = NumberSeq(summary->get_total_seq(),
6eddcbe17c83 6981746: G1: SEGV with -XX:+TraceGen0Time
johnc
parents: 1707
diff changeset
2299 6, other_parts);
6eddcbe17c83 6981746: G1: SEGV with -XX:+TraceGen0Time
johnc
parents: 1707
diff changeset
2300 }
6eddcbe17c83 6981746: G1: SEGV with -XX:+TraceGen0Time
johnc
parents: 1707
diff changeset
2301 check_other_times(1, summary->get_other_seq(), &calc_other_times_ms);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2302 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2303 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2304 } else {
2363
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents: 2188
diff changeset
2305 LineBuffer(1).append_and_print_cr("none");
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2306 }
2363
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents: 2188
diff changeset
2307 LineBuffer(0).append_and_print_cr("");
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2308 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2309
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2310 void G1CollectorPolicy::print_tracing_info() const {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2311 if (TraceGen0Time) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2312 gclog_or_tty->print_cr("ALL PAUSES");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2313 print_summary_sd(0, "Total", _all_pause_times_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2314 gclog_or_tty->print_cr("");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2315 gclog_or_tty->print_cr("");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2316 gclog_or_tty->print_cr(" Full Young GC Pauses: %8d", _full_young_pause_num);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2317 gclog_or_tty->print_cr(" Partial Young GC Pauses: %8d", _partial_young_pause_num);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2318 gclog_or_tty->print_cr("");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2319
677
96b229c54d1e 6543938: G1: remove the concept of popularity
apetrusenko
parents: 648
diff changeset
2320 gclog_or_tty->print_cr("EVACUATION PAUSES");
96b229c54d1e 6543938: G1: remove the concept of popularity
apetrusenko
parents: 648
diff changeset
2321 print_summary(_summary);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2322
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2323 gclog_or_tty->print_cr("MISC");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2324 print_summary_sd(0, "Stop World", _all_stop_world_times_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2325 print_summary_sd(0, "Yields", _all_yield_times_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2326 for (int i = 0; i < _aux_num; ++i) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2327 if (_all_aux_times_ms[i].num() > 0) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2328 char buffer[96];
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2329 sprintf(buffer, "Aux%d", i);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2330 print_summary_sd(0, buffer, &_all_aux_times_ms[i]);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2331 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2332 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2333
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2334 size_t all_region_num = _region_num_young + _region_num_tenured;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2335 gclog_or_tty->print_cr(" New Regions %8d, Young %8d (%6.2lf%%), "
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2336 "Tenured %8d (%6.2lf%%)",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2337 all_region_num,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2338 _region_num_young,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2339 (double) _region_num_young / (double) all_region_num * 100.0,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2340 _region_num_tenured,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2341 (double) _region_num_tenured / (double) all_region_num * 100.0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2342 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2343 if (TraceGen1Time) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2344 if (_all_full_gc_times_ms->num() > 0) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2345 gclog_or_tty->print("\n%4d full_gcs: total time = %8.2f s",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2346 _all_full_gc_times_ms->num(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2347 _all_full_gc_times_ms->sum() / 1000.0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2348 gclog_or_tty->print_cr(" (avg = %8.2fms).", _all_full_gc_times_ms->avg());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2349 gclog_or_tty->print_cr(" [std. dev = %8.2f ms, max = %8.2f ms]",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2350 _all_full_gc_times_ms->sd(),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2351 _all_full_gc_times_ms->maximum());
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2352 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2353 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2354 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2355
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2356 void G1CollectorPolicy::print_yg_surv_rate_info() const {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2357 #ifndef PRODUCT
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2358 _short_lived_surv_rate_group->print_surv_rate_summary();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2359 // add this call for any other surv rate groups
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2360 #endif // PRODUCT
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2361 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2362
3914
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2363 void G1CollectorPolicy::update_region_num(bool young) {
1973
631f79e71e90 6974966: G1: unnecessary direct-to-old allocations
tonyp
parents: 1972
diff changeset
2364 if (young) {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2365 ++_region_num_young;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2366 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2367 ++_region_num_tenured;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2368 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2369 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2370
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2371 #ifndef PRODUCT
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2372 // for debugging, bit of a hack...
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2373 static char*
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2374 region_num_to_mbs(int length) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2375 static char buffer[64];
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2376 double bytes = (double) (length * HeapRegion::GrainBytes);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2377 double mbs = bytes / (double) (1024 * 1024);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2378 sprintf(buffer, "%7.2lfMB", mbs);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2379 return buffer;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2380 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2381 #endif // PRODUCT
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2382
545
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 526
diff changeset
2383 size_t G1CollectorPolicy::max_regions(int purpose) {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2384 switch (purpose) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2385 case GCAllocForSurvived:
545
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 526
diff changeset
2386 return _max_survivor_regions;
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2387 case GCAllocForTenured:
545
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 526
diff changeset
2388 return REGIONS_UNLIMITED;
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2389 default:
545
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 526
diff changeset
2390 ShouldNotReachHere();
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 526
diff changeset
2391 return REGIONS_UNLIMITED;
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2392 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2393 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2394
3919
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
2395 void G1CollectorPolicy::update_max_gc_locker_expansion() {
1991
016a3628c885 6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen
tonyp
parents: 1973
diff changeset
2396 size_t expansion_region_num = 0;
016a3628c885 6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen
tonyp
parents: 1973
diff changeset
2397 if (GCLockerEdenExpansionPercent > 0) {
016a3628c885 6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen
tonyp
parents: 1973
diff changeset
2398 double perc = (double) GCLockerEdenExpansionPercent / 100.0;
016a3628c885 6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen
tonyp
parents: 1973
diff changeset
2399 double expansion_region_num_d = perc * (double) _young_list_target_length;
016a3628c885 6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen
tonyp
parents: 1973
diff changeset
2400 // We use ceiling so that if expansion_region_num_d is > 0.0 (but
016a3628c885 6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen
tonyp
parents: 1973
diff changeset
2401 // less than 1.0) we'll get 1.
016a3628c885 6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen
tonyp
parents: 1973
diff changeset
2402 expansion_region_num = (size_t) ceil(expansion_region_num_d);
016a3628c885 6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen
tonyp
parents: 1973
diff changeset
2403 } else {
016a3628c885 6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen
tonyp
parents: 1973
diff changeset
2404 assert(expansion_region_num == 0, "sanity");
016a3628c885 6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen
tonyp
parents: 1973
diff changeset
2405 }
016a3628c885 6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen
tonyp
parents: 1973
diff changeset
2406 _young_list_max_length = _young_list_target_length + expansion_region_num;
016a3628c885 6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen
tonyp
parents: 1973
diff changeset
2407 assert(_young_list_target_length <= _young_list_max_length, "post-condition");
016a3628c885 6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen
tonyp
parents: 1973
diff changeset
2408 }
016a3628c885 6994056: G1: when GC locker is active, extend the Eden instead of allocating into the old gen
tonyp
parents: 1973
diff changeset
2409
545
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 526
diff changeset
2410 // Calculates survivor space parameters.
3919
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
2411 void G1CollectorPolicy::update_survivors_policy() {
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
2412 double max_survivor_regions_d =
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
2413 (double) _young_list_target_length / (double) SurvivorRatio;
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
2414 // We use ceiling so that if max_survivor_regions_d is > 0.0 (but
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
2415 // smaller than 1.0) we'll get 1.
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
2416 _max_survivor_regions = (size_t) ceil(max_survivor_regions_d);
4f41766176cf 7084509: G1: fix inconsistencies and mistakes in the young list target length calculations
tonyp
parents: 3914
diff changeset
2417
3868
ae73da50be4b 7081064: G1: remove develop params G1FixedSurvivorSpaceSize, G1FixedTenuringThreshold, and G1FixedEdenSize
tonyp
parents: 3867
diff changeset
2418 _tenuring_threshold = _survivors_age_table.compute_tenuring_threshold(
545
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 526
diff changeset
2419 HeapRegion::GrainWords * _max_survivor_regions);
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 526
diff changeset
2420 }
58054a18d735 6484959: G1: introduce survivor spaces
apetrusenko
parents: 526
diff changeset
2421
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2422 #ifndef PRODUCT
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2423 class HRSortIndexIsOKClosure: public HeapRegionClosure {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2424 CollectionSetChooser* _chooser;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2425 public:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2426 HRSortIndexIsOKClosure(CollectionSetChooser* chooser) :
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2427 _chooser(chooser) {}
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2428
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2429 bool doHeapRegion(HeapRegion* r) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2430 if (!r->continuesHumongous()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2431 assert(_chooser->regionProperlyOrdered(r), "Ought to be.");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2432 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2433 return false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2434 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2435 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2436
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2437 bool G1CollectorPolicy_BestRegionsFirst::assertMarkedBytesDataOK() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2438 HRSortIndexIsOKClosure cl(_collectionSetChooser);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2439 _g1->heap_region_iterate(&cl);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2440 return true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2441 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2442 #endif
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2443
3914
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2444 bool G1CollectorPolicy::force_initial_mark_if_outside_cycle(
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2445 GCCause::Cause gc_cause) {
1656
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly
tonyp
parents: 1611
diff changeset
2446 bool during_cycle = _g1->concurrent_mark()->cmThread()->during_cycle();
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly
tonyp
parents: 1611
diff changeset
2447 if (!during_cycle) {
3914
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2448 ergo_verbose1(ErgoConcCycles,
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2449 "request concurrent cycle initiation",
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2450 ergo_format_reason("requested by GC cause")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2451 ergo_format_str("GC cause"),
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2452 GCCause::to_string(gc_cause));
1656
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly
tonyp
parents: 1611
diff changeset
2453 set_initiate_conc_mark_if_possible();
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly
tonyp
parents: 1611
diff changeset
2454 return true;
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly
tonyp
parents: 1611
diff changeset
2455 } else {
3914
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2456 ergo_verbose1(ErgoConcCycles,
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2457 "do not request concurrent cycle initiation",
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2458 ergo_format_reason("concurrent cycle already in progress")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2459 ergo_format_str("GC cause"),
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2460 GCCause::to_string(gc_cause));
1656
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly
tonyp
parents: 1611
diff changeset
2461 return false;
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly
tonyp
parents: 1611
diff changeset
2462 }
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly
tonyp
parents: 1611
diff changeset
2463 }
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly
tonyp
parents: 1611
diff changeset
2464
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2465 void
1359
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
2466 G1CollectorPolicy::decide_on_conc_mark_initiation() {
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
2467 // We are about to decide on whether this pause will be an
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
2468 // initial-mark pause.
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
2469
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
2470 // First, during_initial_mark_pause() should not be already set. We
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
2471 // will set it here if we have to. However, it should be cleared by
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
2472 // the end of the pause (it's only set for the duration of an
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
2473 // initial-mark pause).
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
2474 assert(!during_initial_mark_pause(), "pre-condition");
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
2475
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
2476 if (initiate_conc_mark_if_possible()) {
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
2477 // We had noticed on a previous pause that the heap occupancy has
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
2478 // gone over the initiating threshold and we should start a
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
2479 // concurrent marking cycle. So we might initiate one.
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
2480
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
2481 bool during_cycle = _g1->concurrent_mark()->cmThread()->during_cycle();
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
2482 if (!during_cycle) {
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
2483 // The concurrent marking thread is not "during a cycle", i.e.,
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
2484 // it has completed the last one. So we can go ahead and
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
2485 // initiate a new cycle.
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
2486
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
2487 set_during_initial_mark_pause();
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
2488
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
2489 // And we can now clear initiate_conc_mark_if_possible() as
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
2490 // we've already acted on it.
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
2491 clear_initiate_conc_mark_if_possible();
3914
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2492
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2493 ergo_verbose0(ErgoConcCycles,
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2494 "initiate concurrent cycle",
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2495 ergo_format_reason("concurrent cycle initiation requested"));
1359
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
2496 } else {
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
2497 // The concurrent marking thread is still finishing up the
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
2498 // previous cycle. If we start one right now the two cycles
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
2499 // overlap. In particular, the concurrent marking thread might
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
2500 // be in the process of clearing the next marking bitmap (which
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
2501 // we will use for the next cycle if we start one). Starting a
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
2502 // cycle now will be bad given that parts of the marking
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
2503 // information might get cleared by the marking thread. And we
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
2504 // cannot wait for the marking thread to finish the cycle as it
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
2505 // periodically yields while clearing the next marking bitmap
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
2506 // and, if it's in a yield point, it's waiting for us to
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
2507 // finish. So, at this point we will not start a cycle and we'll
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
2508 // let the concurrent marking thread complete the last one.
3914
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2509 ergo_verbose0(ErgoConcCycles,
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2510 "do not initiate concurrent cycle",
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2511 ergo_format_reason("concurrent cycle already in progress"));
1359
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
2512 }
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
2513 }
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
2514 }
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
2515
23b1b27ac76c 6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents: 1356
diff changeset
2516 void
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2517 G1CollectorPolicy_BestRegionsFirst::
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2518 record_collection_pause_start(double start_time_sec, size_t start_used) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2519 G1CollectorPolicy::record_collection_pause_start(start_time_sec, start_used);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2520 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2521
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2522 class KnownGarbageClosure: public HeapRegionClosure {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2523 CollectionSetChooser* _hrSorted;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2524
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2525 public:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2526 KnownGarbageClosure(CollectionSetChooser* hrSorted) :
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2527 _hrSorted(hrSorted)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2528 {}
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2529
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2530 bool doHeapRegion(HeapRegion* r) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2531 // We only include humongous regions in collection
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2532 // sets when concurrent mark shows that their contained object is
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2533 // unreachable.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2534
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2535 // Do we have any marking information for this region?
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2536 if (r->is_marked()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2537 // We don't include humongous regions in collection
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2538 // sets because we collect them immediately at the end of a marking
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2539 // cycle. We also don't include young regions because we *must*
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2540 // include them in the next collection pause.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2541 if (!r->isHumongous() && !r->is_young()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2542 _hrSorted->addMarkedHeapRegion(r);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2543 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2544 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2545 return false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2546 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2547 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2548
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2549 class ParKnownGarbageHRClosure: public HeapRegionClosure {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2550 CollectionSetChooser* _hrSorted;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2551 jint _marked_regions_added;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2552 jint _chunk_size;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2553 jint _cur_chunk_idx;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2554 jint _cur_chunk_end; // Cur chunk [_cur_chunk_idx, _cur_chunk_end)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2555 int _worker;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2556 int _invokes;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2557
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2558 void get_new_chunk() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2559 _cur_chunk_idx = _hrSorted->getParMarkedHeapRegionChunk(_chunk_size);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2560 _cur_chunk_end = _cur_chunk_idx + _chunk_size;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2561 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2562 void add_region(HeapRegion* r) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2563 if (_cur_chunk_idx == _cur_chunk_end) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2564 get_new_chunk();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2565 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2566 assert(_cur_chunk_idx < _cur_chunk_end, "postcondition");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2567 _hrSorted->setMarkedHeapRegion(_cur_chunk_idx, r);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2568 _marked_regions_added++;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2569 _cur_chunk_idx++;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2570 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2571
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2572 public:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2573 ParKnownGarbageHRClosure(CollectionSetChooser* hrSorted,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2574 jint chunk_size,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2575 int worker) :
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2576 _hrSorted(hrSorted), _chunk_size(chunk_size), _worker(worker),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2577 _marked_regions_added(0), _cur_chunk_idx(0), _cur_chunk_end(0),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2578 _invokes(0)
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2579 {}
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2580
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2581 bool doHeapRegion(HeapRegion* r) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2582 // We only include humongous regions in collection
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2583 // sets when concurrent mark shows that their contained object is
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2584 // unreachable.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2585 _invokes++;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2586
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2587 // Do we have any marking information for this region?
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2588 if (r->is_marked()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2589 // We don't include humongous regions in collection
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2590 // sets because we collect them immediately at the end of a marking
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2591 // cycle.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2592 // We also do not include young regions in collection sets
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2593 if (!r->isHumongous() && !r->is_young()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2594 add_region(r);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2595 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2596 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2597 return false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2598 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2599 jint marked_regions_added() { return _marked_regions_added; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2600 int invokes() { return _invokes; }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2601 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2602
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2603 class ParKnownGarbageTask: public AbstractGangTask {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2604 CollectionSetChooser* _hrSorted;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2605 jint _chunk_size;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2606 G1CollectedHeap* _g1;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2607 public:
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2608 ParKnownGarbageTask(CollectionSetChooser* hrSorted, jint chunk_size) :
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2609 AbstractGangTask("ParKnownGarbageTask"),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2610 _hrSorted(hrSorted), _chunk_size(chunk_size),
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2611 _g1(G1CollectedHeap::heap())
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2612 {}
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2613
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2614 void work(int i) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2615 ParKnownGarbageHRClosure parKnownGarbageCl(_hrSorted, _chunk_size, i);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2616 // Back to zero for the claim value.
355
0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires
tonyp
parents: 342
diff changeset
2617 _g1->heap_region_par_iterate_chunked(&parKnownGarbageCl, i,
0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires
tonyp
parents: 342
diff changeset
2618 HeapRegion::InitialClaimValue);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2619 jint regions_added = parKnownGarbageCl.marked_regions_added();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2620 _hrSorted->incNumMarkedHeapRegions(regions_added);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2621 if (G1PrintParCleanupStats) {
2363
c93aa6caa02f 7022943: G1: improve logging to avoid interleaved numbers
brutisso
parents: 2188
diff changeset
2622 gclog_or_tty->print_cr(" Thread %d called %d times, added %d regions to list.",
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2623 i, parKnownGarbageCl.invokes(), regions_added);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2624 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2625 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2626 };
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2627
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2628 void
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2629 G1CollectorPolicy_BestRegionsFirst::
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2630 record_concurrent_mark_cleanup_end(size_t freed_bytes,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2631 size_t max_live_bytes) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2632 double start;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2633 if (G1PrintParCleanupStats) start = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2634 record_concurrent_mark_cleanup_end_work1(freed_bytes, max_live_bytes);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2635
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2636 _collectionSetChooser->clearMarkedHeapRegions();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2637 double clear_marked_end;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2638 if (G1PrintParCleanupStats) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2639 clear_marked_end = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2640 gclog_or_tty->print_cr(" clear marked regions + work1: %8.3f ms.",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2641 (clear_marked_end - start)*1000.0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2642 }
1833
8b10f48633dc 6984287: Regularize how GC parallel workers are specified.
jmasa
parents: 1779
diff changeset
2643 if (G1CollectedHeap::use_parallel_gc_threads()) {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2644 const size_t OverpartitionFactor = 4;
1571
2d127394260e 6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb
kvn
parents: 1394
diff changeset
2645 const size_t MinWorkUnit = 8;
2d127394260e 6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb
kvn
parents: 1394
diff changeset
2646 const size_t WorkUnit =
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2647 MAX2(_g1->n_regions() / (ParallelGCThreads * OverpartitionFactor),
1571
2d127394260e 6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb
kvn
parents: 1394
diff changeset
2648 MinWorkUnit);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2649 _collectionSetChooser->prepareForAddMarkedHeapRegionsPar(_g1->n_regions(),
1571
2d127394260e 6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb
kvn
parents: 1394
diff changeset
2650 WorkUnit);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2651 ParKnownGarbageTask parKnownGarbageTask(_collectionSetChooser,
1571
2d127394260e 6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb
kvn
parents: 1394
diff changeset
2652 (int) WorkUnit);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2653 _g1->workers()->run_task(&parKnownGarbageTask);
355
0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires
tonyp
parents: 342
diff changeset
2654
0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires
tonyp
parents: 342
diff changeset
2655 assert(_g1->check_heap_region_claim_values(HeapRegion::InitialClaimValue),
0edda524b58c 6722565: G1: assert !r->is_on_unclean_list() fires
tonyp
parents: 342
diff changeset
2656 "sanity check");
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2657 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2658 KnownGarbageClosure knownGarbagecl(_collectionSetChooser);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2659 _g1->heap_region_iterate(&knownGarbagecl);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2660 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2661 double known_garbage_end;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2662 if (G1PrintParCleanupStats) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2663 known_garbage_end = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2664 gclog_or_tty->print_cr(" compute known garbage: %8.3f ms.",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2665 (known_garbage_end - clear_marked_end)*1000.0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2666 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2667 _collectionSetChooser->sortMarkedHeapRegions();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2668 double sort_end;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2669 if (G1PrintParCleanupStats) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2670 sort_end = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2671 gclog_or_tty->print_cr(" sorting: %8.3f ms.",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2672 (sort_end - known_garbage_end)*1000.0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2673 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2674
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2675 record_concurrent_mark_cleanup_end_work2();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2676 double work2_end;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2677 if (G1PrintParCleanupStats) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2678 work2_end = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2679 gclog_or_tty->print_cr(" work2: %8.3f ms.",
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2680 (work2_end - sort_end)*1000.0);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2681 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2682 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2683
1394
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2684 // Add the heap region at the head of the non-incremental collection set
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2685 void G1CollectorPolicy::
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2686 add_to_collection_set(HeapRegion* hr) {
1394
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2687 assert(_inc_cset_build_state == Active, "Precondition");
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2688 assert(!hr->is_young(), "non-incremental add of young region");
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2689
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2690 if (_g1->mark_in_progress())
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2691 _g1->concurrent_mark()->registerCSetRegion(hr);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2692
1394
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2693 assert(!hr->in_collection_set(), "should not already be in the CSet");
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2694 hr->set_in_collection_set(true);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2695 hr->set_next_in_collection_set(_collection_set);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2696 _collection_set = hr;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2697 _collection_set_size++;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2698 _collection_set_bytes_used_before += hr->used();
526
818efdefcc99 6484956: G1: improve evacuation pause efficiency
tonyp
parents: 470
diff changeset
2699 _g1->register_region_with_in_cset_fast_test(hr);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2700 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2701
1394
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2702 // Initialize the per-collection-set information
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2703 void G1CollectorPolicy::start_incremental_cset_building() {
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2704 assert(_inc_cset_build_state == Inactive, "Precondition");
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2705
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2706 _inc_cset_head = NULL;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2707 _inc_cset_tail = NULL;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2708 _inc_cset_size = 0;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2709 _inc_cset_bytes_used_before = 0;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2710
3867
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
2711 _inc_cset_young_index = 0;
1394
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2712
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2713 _inc_cset_max_finger = 0;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2714 _inc_cset_recorded_young_bytes = 0;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2715 _inc_cset_recorded_rs_lengths = 0;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2716 _inc_cset_predicted_elapsed_time_ms = 0;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2717 _inc_cset_predicted_bytes_to_copy = 0;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2718 _inc_cset_build_state = Active;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2719 }
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2720
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2721 void G1CollectorPolicy::add_to_incremental_cset_info(HeapRegion* hr, size_t rs_length) {
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2722 // This routine is used when:
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2723 // * adding survivor regions to the incremental cset at the end of an
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2724 // evacuation pause,
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2725 // * adding the current allocation region to the incremental cset
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2726 // when it is retired, and
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2727 // * updating existing policy information for a region in the
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2728 // incremental cset via young list RSet sampling.
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2729 // Therefore this routine may be called at a safepoint by the
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2730 // VM thread, or in-between safepoints by mutator threads (when
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2731 // retiring the current allocation region) or a concurrent
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2732 // refine thread (RSet sampling).
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2733
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2734 double region_elapsed_time_ms = predict_region_elapsed_time_ms(hr, true);
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2735 size_t used_bytes = hr->used();
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2736
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2737 _inc_cset_recorded_rs_lengths += rs_length;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2738 _inc_cset_predicted_elapsed_time_ms += region_elapsed_time_ms;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2739
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2740 _inc_cset_bytes_used_before += used_bytes;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2741
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2742 // Cache the values we have added to the aggregated informtion
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2743 // in the heap region in case we have to remove this region from
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2744 // the incremental collection set, or it is updated by the
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2745 // rset sampling code
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2746 hr->set_recorded_rs_length(rs_length);
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2747 hr->set_predicted_elapsed_time_ms(region_elapsed_time_ms);
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2748
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2749 #if PREDICTIONS_VERBOSE
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2750 size_t bytes_to_copy = predict_bytes_to_copy(hr);
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2751 _inc_cset_predicted_bytes_to_copy += bytes_to_copy;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2752
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2753 // Record the number of bytes used in this region
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2754 _inc_cset_recorded_young_bytes += used_bytes;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2755
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2756 // Cache the values we have added to the aggregated informtion
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2757 // in the heap region in case we have to remove this region from
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2758 // the incremental collection set, or it is updated by the
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2759 // rset sampling code
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2760 hr->set_predicted_bytes_to_copy(bytes_to_copy);
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2761 #endif // PREDICTIONS_VERBOSE
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2762 }
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2763
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2764 void G1CollectorPolicy::remove_from_incremental_cset_info(HeapRegion* hr) {
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2765 // This routine is currently only called as part of the updating of
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2766 // existing policy information for regions in the incremental cset that
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2767 // is performed by the concurrent refine thread(s) as part of young list
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2768 // RSet sampling. Therefore we should not be at a safepoint.
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2769
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2770 assert(!SafepointSynchronize::is_at_safepoint(), "should not be at safepoint");
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2771 assert(hr->is_young(), "it should be");
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2772
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2773 size_t used_bytes = hr->used();
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2774 size_t old_rs_length = hr->recorded_rs_length();
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2775 double old_elapsed_time_ms = hr->predicted_elapsed_time_ms();
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2776
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2777 // Subtract the old recorded/predicted policy information for
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2778 // the given heap region from the collection set info.
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2779 _inc_cset_recorded_rs_lengths -= old_rs_length;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2780 _inc_cset_predicted_elapsed_time_ms -= old_elapsed_time_ms;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2781
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2782 _inc_cset_bytes_used_before -= used_bytes;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2783
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2784 // Clear the values cached in the heap region
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2785 hr->set_recorded_rs_length(0);
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2786 hr->set_predicted_elapsed_time_ms(0);
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2787
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2788 #if PREDICTIONS_VERBOSE
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2789 size_t old_predicted_bytes_to_copy = hr->predicted_bytes_to_copy();
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2790 _inc_cset_predicted_bytes_to_copy -= old_predicted_bytes_to_copy;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2791
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2792 // Subtract the number of bytes used in this region
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2793 _inc_cset_recorded_young_bytes -= used_bytes;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2794
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2795 // Clear the values cached in the heap region
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2796 hr->set_predicted_bytes_to_copy(0);
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2797 #endif // PREDICTIONS_VERBOSE
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2798 }
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2799
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2800 void G1CollectorPolicy::update_incremental_cset_info(HeapRegion* hr, size_t new_rs_length) {
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2801 // Update the collection set information that is dependent on the new RS length
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2802 assert(hr->is_young(), "Precondition");
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2803
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2804 remove_from_incremental_cset_info(hr);
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2805 add_to_incremental_cset_info(hr, new_rs_length);
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2806 }
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2807
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2808 void G1CollectorPolicy::add_region_to_incremental_cset_common(HeapRegion* hr) {
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2809 assert( hr->is_young(), "invariant");
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2810 assert( hr->young_index_in_cset() == -1, "invariant" );
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2811 assert(_inc_cset_build_state == Active, "Precondition");
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2812
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2813 // We need to clear and set the cached recorded/cached collection set
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2814 // information in the heap region here (before the region gets added
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2815 // to the collection set). An individual heap region's cached values
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2816 // are calculated, aggregated with the policy collection set info,
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2817 // and cached in the heap region here (initially) and (subsequently)
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2818 // by the Young List sampling code.
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2819
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2820 size_t rs_length = hr->rem_set()->occupied();
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2821 add_to_incremental_cset_info(hr, rs_length);
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2822
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2823 HeapWord* hr_end = hr->end();
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2824 _inc_cset_max_finger = MAX2(_inc_cset_max_finger, hr_end);
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2825
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2826 assert(!hr->in_collection_set(), "invariant");
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2827 hr->set_in_collection_set(true);
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2828 assert( hr->next_in_collection_set() == NULL, "invariant");
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2829
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2830 _inc_cset_size++;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2831 _g1->register_region_with_in_cset_fast_test(hr);
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2832
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2833 hr->set_young_index_in_cset((int) _inc_cset_young_index);
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2834 ++_inc_cset_young_index;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2835 }
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2836
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2837 // Add the region at the RHS of the incremental cset
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2838 void G1CollectorPolicy::add_region_to_incremental_cset_rhs(HeapRegion* hr) {
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2839 // We should only ever be appending survivors at the end of a pause
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2840 assert( hr->is_survivor(), "Logic");
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2841
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2842 // Do the 'common' stuff
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2843 add_region_to_incremental_cset_common(hr);
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2844
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2845 // Now add the region at the right hand side
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2846 if (_inc_cset_tail == NULL) {
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2847 assert(_inc_cset_head == NULL, "invariant");
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2848 _inc_cset_head = hr;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2849 } else {
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2850 _inc_cset_tail->set_next_in_collection_set(hr);
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2851 }
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2852 _inc_cset_tail = hr;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2853 }
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2854
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2855 // Add the region to the LHS of the incremental cset
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2856 void G1CollectorPolicy::add_region_to_incremental_cset_lhs(HeapRegion* hr) {
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2857 // Survivors should be added to the RHS at the end of a pause
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2858 assert(!hr->is_survivor(), "Logic");
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2859
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2860 // Do the 'common' stuff
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2861 add_region_to_incremental_cset_common(hr);
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2862
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2863 // Add the region at the left hand side
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2864 hr->set_next_in_collection_set(_inc_cset_head);
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2865 if (_inc_cset_head == NULL) {
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2866 assert(_inc_cset_tail == NULL, "Invariant");
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2867 _inc_cset_tail = hr;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2868 }
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2869 _inc_cset_head = hr;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2870 }
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2871
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2872 #ifndef PRODUCT
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2873 void G1CollectorPolicy::print_collection_set(HeapRegion* list_head, outputStream* st) {
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2874 assert(list_head == inc_cset_head() || list_head == collection_set(), "must be");
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2875
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2876 st->print_cr("\nCollection_set:");
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2877 HeapRegion* csr = list_head;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2878 while (csr != NULL) {
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2879 HeapRegion* next = csr->next_in_collection_set();
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2880 assert(csr->in_collection_set(), "bad CS");
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2881 st->print_cr(" [%08x-%08x], t: %08x, P: %08x, N: %08x, C: %08x, "
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2882 "age: %4d, y: %d, surv: %d",
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2883 csr->bottom(), csr->end(),
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2884 csr->top(),
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2885 csr->prev_top_at_mark_start(),
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2886 csr->next_top_at_mark_start(),
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2887 csr->top_at_conc_mark_count(),
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2888 csr->age_in_surv_rate_group_cond(),
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2889 csr->is_young(),
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2890 csr->is_survivor());
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2891 csr = next;
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2892 }
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2893 }
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2894 #endif // !PRODUCT
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2895
1707
0ce1569c90e5 6963209: G1: remove the concept of abandoned pauses
tonyp
parents: 1705
diff changeset
2896 void
1656
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly
tonyp
parents: 1611
diff changeset
2897 G1CollectorPolicy_BestRegionsFirst::choose_collection_set(
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly
tonyp
parents: 1611
diff changeset
2898 double target_pause_time_ms) {
1394
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2899 // Set this here - in case we're not doing young collections.
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2900 double non_young_start_time_sec = os::elapsedTime();
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2901
3914
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2902 YoungList* young_list = _g1->young_list();
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2903
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2904 start_recording_regions();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2905
1656
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly
tonyp
parents: 1611
diff changeset
2906 guarantee(target_pause_time_ms > 0.0,
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly
tonyp
parents: 1611
diff changeset
2907 err_msg("target_pause_time_ms = %1.6lf should be positive",
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly
tonyp
parents: 1611
diff changeset
2908 target_pause_time_ms));
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly
tonyp
parents: 1611
diff changeset
2909 guarantee(_collection_set == NULL, "Precondition");
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2910
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2911 double base_time_ms = predict_base_elapsed_time_ms(_pending_cards);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2912 double predicted_pause_time_ms = base_time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2913
1656
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly
tonyp
parents: 1611
diff changeset
2914 double time_remaining_ms = target_pause_time_ms - base_time_ms;
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2915
3914
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2916 ergo_verbose3(ErgoCSetConstruction | ErgoHigh,
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2917 "start choosing CSet",
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2918 ergo_format_ms("predicted base time")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2919 ergo_format_ms("remaining time")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2920 ergo_format_ms("target pause time"),
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2921 base_time_ms, time_remaining_ms, target_pause_time_ms);
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2922
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2923 // the 10% and 50% values are arbitrary...
3914
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2924 double threshold = 0.10 * target_pause_time_ms;
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2925 if (time_remaining_ms < threshold) {
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2926 double prev_time_remaining_ms = time_remaining_ms;
1656
4e5661ba9d98 6944166: G1: explicit GCs are not always handled correctly
tonyp
parents: 1611
diff changeset
2927 time_remaining_ms = 0.50 * target_pause_time_ms;
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2928 _within_target = false;
3914
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2929 ergo_verbose3(ErgoCSetConstruction,
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2930 "adjust remaining time",
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2931 ergo_format_reason("remaining time lower than threshold")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2932 ergo_format_ms("remaining time")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2933 ergo_format_ms("threshold")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2934 ergo_format_ms("adjusted remaining time"),
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2935 prev_time_remaining_ms, threshold, time_remaining_ms);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2936 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2937 _within_target = true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2938 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2939
3914
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2940 size_t expansion_bytes = _g1->expansion_regions() * HeapRegion::GrainBytes;
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2941
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2942 HeapRegion* hr;
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2943 double young_start_time_sec = os::elapsedTime();
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
2944
677
96b229c54d1e 6543938: G1: remove the concept of popularity
apetrusenko
parents: 648
diff changeset
2945 _collection_set_bytes_used_before = 0;
96b229c54d1e 6543938: G1: remove the concept of popularity
apetrusenko
parents: 648
diff changeset
2946 _collection_set_size = 0;
3867
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
2947 _young_cset_length = 0;
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
2948 _last_young_gc_full = full_young_gcs() ? true : false;
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
2949
3914
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2950 if (_last_young_gc_full) {
3867
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
2951 ++_full_young_pause_num;
3914
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2952 } else {
3867
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
2953 ++_partial_young_pause_num;
3914
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2954 }
3867
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
2955
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
2956 // The young list is laid with the survivor regions from the previous
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
2957 // pause are appended to the RHS of the young list, i.e.
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
2958 // [Newly Young Regions ++ Survivors from last pause].
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
2959
3914
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2960 size_t survivor_region_num = young_list->survivor_length();
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2961 size_t eden_region_num = young_list->length() - survivor_region_num;
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2962 size_t old_region_num = 0;
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2963 hr = young_list->first_survivor_region();
3867
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
2964 while (hr != NULL) {
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
2965 assert(hr->is_survivor(), "badly formed young list");
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
2966 hr->set_young();
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
2967 hr = hr->get_next_young_region();
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
2968 }
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
2969
3914
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2970 // Clear the fields that point to the survivor list - they are all young now.
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2971 young_list->clear_survivors();
3867
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
2972
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
2973 if (_g1->mark_in_progress())
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
2974 _g1->concurrent_mark()->register_collection_set_finger(_inc_cset_max_finger);
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
2975
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
2976 _young_cset_length = _inc_cset_young_index;
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
2977 _collection_set = _inc_cset_head;
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
2978 _collection_set_size = _inc_cset_size;
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
2979 _collection_set_bytes_used_before = _inc_cset_bytes_used_before;
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
2980 time_remaining_ms -= _inc_cset_predicted_elapsed_time_ms;
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
2981 predicted_pause_time_ms += _inc_cset_predicted_elapsed_time_ms;
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
2982
3914
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2983 ergo_verbose3(ErgoCSetConstruction | ErgoHigh,
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2984 "add young regions to CSet",
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2985 ergo_format_region("eden")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2986 ergo_format_region("survivors")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2987 ergo_format_ms("predicted young region time"),
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2988 eden_region_num, survivor_region_num,
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2989 _inc_cset_predicted_elapsed_time_ms);
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
2990
3867
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
2991 // The number of recorded young regions is the incremental
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
2992 // collection set's current size
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
2993 set_recorded_young_regions(_inc_cset_size);
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
2994 set_recorded_rs_lengths(_inc_cset_recorded_rs_lengths);
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
2995 set_recorded_young_bytes(_inc_cset_recorded_young_bytes);
1394
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2996 #if PREDICTIONS_VERBOSE
3867
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
2997 set_predicted_bytes_to_copy(_inc_cset_predicted_bytes_to_copy);
1394
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2998 #endif // PREDICTIONS_VERBOSE
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
2999
3914
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
3000 assert(_inc_cset_size == young_list->length(), "Invariant");
3867
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
3001
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
3002 double young_end_time_sec = os::elapsedTime();
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
3003 _recorded_young_cset_choice_time_ms =
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
3004 (young_end_time_sec - young_start_time_sec) * 1000.0;
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
3005
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
3006 // We are doing young collections so reset this.
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
3007 non_young_start_time_sec = young_end_time_sec;
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
3008
ff53346271fe 6814390: G1: remove the concept of non-generational G1
brutisso
parents: 3830
diff changeset
3009 if (!full_young_gcs()) {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3010 bool should_continue = true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3011 NumberSeq seq;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3012 double avg_prediction = 100000000000000000.0; // something very large
1394
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
3013
3914
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
3014 size_t prev_collection_set_size = _collection_set_size;
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
3015 double prev_predicted_pause_time_ms = predicted_pause_time_ms;
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3016 do {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3017 hr = _collectionSetChooser->getNextMarkedRegion(time_remaining_ms,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3018 avg_prediction);
677
96b229c54d1e 6543938: G1: remove the concept of popularity
apetrusenko
parents: 648
diff changeset
3019 if (hr != NULL) {
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3020 double predicted_time_ms = predict_region_elapsed_time_ms(hr, false);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3021 time_remaining_ms -= predicted_time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3022 predicted_pause_time_ms += predicted_time_ms;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3023 add_to_collection_set(hr);
1394
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
3024 record_non_young_cset_region(hr);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3025 seq.add(predicted_time_ms);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3026 avg_prediction = seq.avg() + seq.sd();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3027 }
3914
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
3028
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
3029 should_continue = true;
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
3030 if (hr == NULL) {
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
3031 // No need for an ergo verbose message here,
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
3032 // getNextMarkRegion() does this when it returns NULL.
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
3033 should_continue = false;
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
3034 } else {
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
3035 if (adaptive_young_list_length()) {
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
3036 if (time_remaining_ms < 0.0) {
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
3037 ergo_verbose1(ErgoCSetConstruction,
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
3038 "stop adding old regions to CSet",
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
3039 ergo_format_reason("remaining time is lower than 0")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
3040 ergo_format_ms("remaining time"),
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
3041 time_remaining_ms);
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
3042 should_continue = false;
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
3043 }
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
3044 } else {
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
3045 if (_collection_set_size < _young_list_fixed_length) {
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
3046 ergo_verbose2(ErgoCSetConstruction,
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
3047 "stop adding old regions to CSet",
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
3048 ergo_format_reason("CSet length lower than target")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
3049 ergo_format_region("CSet")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
3050 ergo_format_region("young target"),
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
3051 _collection_set_size, _young_list_fixed_length);
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
3052 should_continue = false;
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
3053 }
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
3054 }
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
3055 }
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3056 } while (should_continue);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3057
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3058 if (!adaptive_young_list_length() &&
3914
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
3059 _collection_set_size < _young_list_fixed_length) {
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
3060 ergo_verbose2(ErgoCSetConstruction,
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
3061 "request partially-young GCs end",
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
3062 ergo_format_reason("CSet length lower than target")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
3063 ergo_format_region("CSet")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
3064 ergo_format_region("young target"),
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
3065 _collection_set_size, _young_list_fixed_length);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3066 _should_revert_to_full_young_gcs = true;
3914
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
3067 }
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
3068
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
3069 old_region_num = _collection_set_size - prev_collection_set_size;
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
3070
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
3071 ergo_verbose2(ErgoCSetConstruction | ErgoHigh,
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
3072 "add old regions to CSet",
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
3073 ergo_format_region("old")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
3074 ergo_format_ms("predicted old region time"),
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
3075 old_region_num,
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
3076 predicted_pause_time_ms - prev_predicted_pause_time_ms);
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3077 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3078
1394
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
3079 stop_incremental_cset_building();
1316cec51b4d 6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents: 1391
diff changeset
3080
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3081 count_CS_bytes_used();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3082
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3083 end_recording_regions();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3084
3914
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
3085 ergo_verbose5(ErgoCSetConstruction,
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
3086 "finish choosing CSet",
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
3087 ergo_format_region("eden")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
3088 ergo_format_region("survivors")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
3089 ergo_format_region("old")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
3090 ergo_format_ms("predicted pause time")
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
3091 ergo_format_ms("target pause time"),
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
3092 eden_region_num, survivor_region_num, old_region_num,
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
3093 predicted_pause_time_ms, target_pause_time_ms);
20213c8a3c40 7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents: 3868
diff changeset
3094
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3095 double non_young_end_time_sec = os::elapsedTime();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3096 _recorded_non_young_cset_choice_time_ms =
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3097 (non_young_end_time_sec - non_young_start_time_sec) * 1000.0;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3098 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3099
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3100 void G1CollectorPolicy_BestRegionsFirst::record_full_collection_end() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3101 G1CollectorPolicy::record_full_collection_end();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3102 _collectionSetChooser->updateAfterFullCollection();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3103 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3104
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3105 void G1CollectorPolicy_BestRegionsFirst::
1707
0ce1569c90e5 6963209: G1: remove the concept of abandoned pauses
tonyp
parents: 1705
diff changeset
3106 record_collection_pause_end() {
0ce1569c90e5 6963209: G1: remove the concept of abandoned pauses
tonyp
parents: 1705
diff changeset
3107 G1CollectorPolicy::record_collection_pause_end();
342
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3108 assert(assertMarkedBytesDataOK(), "Marked regions not OK at pause end.");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector
ysr
parents:
diff changeset
3109 }