Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/g1/g1GCPhaseTimes.cpp @ 12233:40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
Summary: Use conservative assumptions of required alignment for the various garbage collector components into account when determining the maximum heap size that supports compressed oops. Using this conservative value avoids several circular dependencies in the calculation.
Reviewed-by: stefank, dholmes
author | tschatzl |
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date | Wed, 11 Sep 2013 16:25:02 +0200 |
parents | 5888334c9c24 |
children | 191174b49bec |
rev | line source |
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1 /* |
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2 * Copyright (c) 2013, 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 |
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26 #include "precompiled.hpp" |
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27 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" |
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28 #include "gc_implementation/g1/g1GCPhaseTimes.hpp" |
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29 #include "gc_implementation/g1/g1Log.hpp" |
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30 |
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31 // Helper class for avoiding interleaved logging |
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32 class LineBuffer: public StackObj { |
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33 |
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34 private: |
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35 static const int BUFFER_LEN = 1024; |
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36 static const int INDENT_CHARS = 3; |
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37 char _buffer[BUFFER_LEN]; |
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38 int _indent_level; |
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39 int _cur; |
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40 |
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41 void vappend(const char* format, va_list ap) { |
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42 int res = vsnprintf(&_buffer[_cur], BUFFER_LEN - _cur, format, ap); |
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43 if (res != -1) { |
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44 _cur += res; |
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45 } else { |
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46 DEBUG_ONLY(warning("buffer too small in LineBuffer");) |
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47 _buffer[BUFFER_LEN -1] = 0; |
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48 _cur = BUFFER_LEN; // vsnprintf above should not add to _buffer if we are called again |
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49 } |
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50 } |
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51 |
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52 public: |
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53 explicit LineBuffer(int indent_level): _indent_level(indent_level), _cur(0) { |
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54 for (; (_cur < BUFFER_LEN && _cur < (_indent_level * INDENT_CHARS)); _cur++) { |
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55 _buffer[_cur] = ' '; |
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56 } |
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57 } |
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58 |
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59 #ifndef PRODUCT |
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60 ~LineBuffer() { |
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61 assert(_cur == _indent_level * INDENT_CHARS, "pending data in buffer - append_and_print_cr() not called?"); |
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62 } |
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63 #endif |
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64 |
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65 void append(const char* format, ...) { |
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66 va_list ap; |
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67 va_start(ap, format); |
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68 vappend(format, ap); |
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69 va_end(ap); |
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70 } |
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71 |
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72 void append_and_print_cr(const char* format, ...) { |
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73 va_list ap; |
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74 va_start(ap, format); |
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75 vappend(format, ap); |
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76 va_end(ap); |
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77 gclog_or_tty->print_cr("%s", _buffer); |
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78 _cur = _indent_level * INDENT_CHARS; |
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79 } |
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80 }; |
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81 |
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82 template <class T> |
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83 void WorkerDataArray<T>::print(int level, const char* title) { |
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84 if (_length == 1) { |
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85 // No need for min, max, average and sum for only one worker |
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86 LineBuffer buf(level); |
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87 buf.append("[%s: ", title); |
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88 buf.append(_print_format, _data[0]); |
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89 buf.append_and_print_cr("]"); |
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90 return; |
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91 } |
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92 |
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93 T min = _data[0]; |
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94 T max = _data[0]; |
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95 T sum = 0; |
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96 |
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97 LineBuffer buf(level); |
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98 buf.append("[%s:", title); |
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99 for (uint i = 0; i < _length; ++i) { |
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100 T val = _data[i]; |
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101 min = MIN2(val, min); |
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102 max = MAX2(val, max); |
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103 sum += val; |
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104 if (G1Log::finest()) { |
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105 buf.append(" "); |
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106 buf.append(_print_format, val); |
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107 } |
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108 } |
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109 |
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110 if (G1Log::finest()) { |
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111 buf.append_and_print_cr(""); |
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112 } |
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113 |
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114 double avg = (double)sum / (double)_length; |
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115 buf.append(" Min: "); |
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116 buf.append(_print_format, min); |
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117 buf.append(", Avg: "); |
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118 buf.append("%.1lf", avg); // Always print average as a double |
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119 buf.append(", Max: "); |
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120 buf.append(_print_format, max); |
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121 buf.append(", Diff: "); |
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122 buf.append(_print_format, max - min); |
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123 if (_print_sum) { |
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124 // for things like the start and end times the sum is not |
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125 // that relevant |
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126 buf.append(", Sum: "); |
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127 buf.append(_print_format, sum); |
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128 } |
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129 buf.append_and_print_cr("]"); |
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130 } |
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131 |
6786 | 132 #ifndef PRODUCT |
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133 |
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134 template <> const int WorkerDataArray<int>::_uninitialized = -1; |
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135 template <> const double WorkerDataArray<double>::_uninitialized = -1.0; |
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136 template <> const size_t WorkerDataArray<size_t>::_uninitialized = (size_t)-1; |
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137 |
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138 template <class T> |
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139 void WorkerDataArray<T>::reset() { |
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140 for (uint i = 0; i < _length; i++) { |
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141 _data[i] = (T)_uninitialized; |
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142 } |
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143 } |
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144 |
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145 template <class T> |
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146 void WorkerDataArray<T>::verify() { |
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147 for (uint i = 0; i < _length; i++) { |
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148 assert(_data[i] != _uninitialized, |
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149 err_msg("Invalid data for worker " UINT32_FORMAT ", data: %lf, uninitialized: %lf", |
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150 i, (double)_data[i], (double)_uninitialized)); |
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151 } |
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152 } |
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153 |
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154 #endif |
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155 |
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156 G1GCPhaseTimes::G1GCPhaseTimes(uint max_gc_threads) : |
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157 _max_gc_threads(max_gc_threads), |
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158 _last_gc_worker_start_times_ms(_max_gc_threads, "%.1lf", false), |
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159 _last_ext_root_scan_times_ms(_max_gc_threads, "%.1lf"), |
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160 _last_satb_filtering_times_ms(_max_gc_threads, "%.1lf"), |
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161 _last_update_rs_times_ms(_max_gc_threads, "%.1lf"), |
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162 _last_update_rs_processed_buffers(_max_gc_threads, "%d"), |
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163 _last_scan_rs_times_ms(_max_gc_threads, "%.1lf"), |
12080 | 164 _last_strong_code_root_scan_times_ms(_max_gc_threads, "%.1lf"), |
165 _last_strong_code_root_mark_times_ms(_max_gc_threads, "%.1lf"), | |
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166 _last_obj_copy_times_ms(_max_gc_threads, "%.1lf"), |
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167 _last_termination_times_ms(_max_gc_threads, "%.1lf"), |
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168 _last_termination_attempts(_max_gc_threads, SIZE_FORMAT), |
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169 _last_gc_worker_end_times_ms(_max_gc_threads, "%.1lf", false), |
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170 _last_gc_worker_times_ms(_max_gc_threads, "%.1lf"), |
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171 _last_gc_worker_other_times_ms(_max_gc_threads, "%.1lf") |
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172 { |
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173 assert(max_gc_threads > 0, "Must have some GC threads"); |
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174 } |
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175 |
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176 void G1GCPhaseTimes::note_gc_start(uint active_gc_threads) { |
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177 assert(active_gc_threads > 0, "The number of threads must be > 0"); |
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178 assert(active_gc_threads <= _max_gc_threads, "The number of active threads must be <= the max nubmer of threads"); |
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179 _active_gc_threads = active_gc_threads; |
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180 |
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181 _last_gc_worker_start_times_ms.reset(); |
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182 _last_ext_root_scan_times_ms.reset(); |
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183 _last_satb_filtering_times_ms.reset(); |
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184 _last_update_rs_times_ms.reset(); |
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185 _last_update_rs_processed_buffers.reset(); |
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186 _last_scan_rs_times_ms.reset(); |
12080 | 187 _last_strong_code_root_scan_times_ms.reset(); |
188 _last_strong_code_root_mark_times_ms.reset(); | |
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189 _last_obj_copy_times_ms.reset(); |
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190 _last_termination_times_ms.reset(); |
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191 _last_termination_attempts.reset(); |
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192 _last_gc_worker_end_times_ms.reset(); |
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193 _last_gc_worker_times_ms.reset(); |
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194 _last_gc_worker_other_times_ms.reset(); |
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195 } |
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196 |
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197 void G1GCPhaseTimes::note_gc_end() { |
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198 _last_gc_worker_start_times_ms.verify(); |
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199 _last_ext_root_scan_times_ms.verify(); |
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200 _last_satb_filtering_times_ms.verify(); |
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201 _last_update_rs_times_ms.verify(); |
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202 _last_update_rs_processed_buffers.verify(); |
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203 _last_scan_rs_times_ms.verify(); |
12080 | 204 _last_strong_code_root_scan_times_ms.verify(); |
205 _last_strong_code_root_mark_times_ms.verify(); | |
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206 _last_obj_copy_times_ms.verify(); |
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207 _last_termination_times_ms.verify(); |
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208 _last_termination_attempts.verify(); |
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209 _last_gc_worker_end_times_ms.verify(); |
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210 |
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211 for (uint i = 0; i < _active_gc_threads; i++) { |
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212 double worker_time = _last_gc_worker_end_times_ms.get(i) - _last_gc_worker_start_times_ms.get(i); |
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213 _last_gc_worker_times_ms.set(i, worker_time); |
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214 |
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215 double worker_known_time = _last_ext_root_scan_times_ms.get(i) + |
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216 _last_satb_filtering_times_ms.get(i) + |
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217 _last_update_rs_times_ms.get(i) + |
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218 _last_scan_rs_times_ms.get(i) + |
12080 | 219 _last_strong_code_root_scan_times_ms.get(i) + |
220 _last_strong_code_root_mark_times_ms.get(i) + | |
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221 _last_obj_copy_times_ms.get(i) + |
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222 _last_termination_times_ms.get(i); |
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223 |
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224 double worker_other_time = worker_time - worker_known_time; |
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225 _last_gc_worker_other_times_ms.set(i, worker_other_time); |
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226 } |
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227 |
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228 _last_gc_worker_times_ms.verify(); |
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229 _last_gc_worker_other_times_ms.verify(); |
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230 } |
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231 |
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232 void G1GCPhaseTimes::print_stats(int level, const char* str, double value) { |
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233 LineBuffer(level).append_and_print_cr("[%s: %.1lf ms]", str, value); |
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234 } |
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235 |
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236 void G1GCPhaseTimes::print_stats(int level, const char* str, double value, int workers) { |
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237 LineBuffer(level).append_and_print_cr("[%s: %.1lf ms, GC Workers: %d]", str, value, workers); |
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238 } |
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239 |
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240 double G1GCPhaseTimes::accounted_time_ms() { |
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241 // Subtract the root region scanning wait time. It's initialized to |
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242 // zero at the start of the pause. |
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243 double misc_time_ms = _root_region_scan_wait_time_ms; |
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244 |
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245 misc_time_ms += _cur_collection_par_time_ms; |
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246 |
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247 // Now subtract the time taken to fix up roots in generated code |
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248 misc_time_ms += _cur_collection_code_root_fixup_time_ms; |
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249 |
12080 | 250 // Strong code root migration time |
251 misc_time_ms += _cur_strong_code_root_migration_time_ms; | |
252 | |
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253 // Subtract the time taken to clean the card table from the |
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254 // current value of "other time" |
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255 misc_time_ms += _cur_clear_ct_time_ms; |
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256 |
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257 return misc_time_ms; |
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258 } |
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259 |
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260 void G1GCPhaseTimes::print(double pause_time_sec) { |
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261 if (_root_region_scan_wait_time_ms > 0.0) { |
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262 print_stats(1, "Root Region Scan Waiting", _root_region_scan_wait_time_ms); |
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263 } |
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264 if (G1CollectedHeap::use_parallel_gc_threads()) { |
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265 print_stats(1, "Parallel Time", _cur_collection_par_time_ms, _active_gc_threads); |
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266 _last_gc_worker_start_times_ms.print(2, "GC Worker Start (ms)"); |
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267 _last_ext_root_scan_times_ms.print(2, "Ext Root Scanning (ms)"); |
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268 if (_last_satb_filtering_times_ms.sum() > 0.0) { |
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269 _last_satb_filtering_times_ms.print(2, "SATB Filtering (ms)"); |
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270 } |
12080 | 271 if (_last_strong_code_root_mark_times_ms.sum() > 0.0) { |
272 _last_strong_code_root_mark_times_ms.print(2, "Code Root Marking (ms)"); | |
273 } | |
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274 _last_update_rs_times_ms.print(2, "Update RS (ms)"); |
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275 _last_update_rs_processed_buffers.print(3, "Processed Buffers"); |
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276 _last_scan_rs_times_ms.print(2, "Scan RS (ms)"); |
12080 | 277 _last_strong_code_root_scan_times_ms.print(2, "Code Root Scanning (ms)"); |
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278 _last_obj_copy_times_ms.print(2, "Object Copy (ms)"); |
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279 _last_termination_times_ms.print(2, "Termination (ms)"); |
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280 if (G1Log::finest()) { |
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281 _last_termination_attempts.print(3, "Termination Attempts"); |
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282 } |
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283 _last_gc_worker_other_times_ms.print(2, "GC Worker Other (ms)"); |
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284 _last_gc_worker_times_ms.print(2, "GC Worker Total (ms)"); |
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285 _last_gc_worker_end_times_ms.print(2, "GC Worker End (ms)"); |
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286 } else { |
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287 _last_ext_root_scan_times_ms.print(1, "Ext Root Scanning (ms)"); |
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288 if (_last_satb_filtering_times_ms.sum() > 0.0) { |
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289 _last_satb_filtering_times_ms.print(1, "SATB Filtering (ms)"); |
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290 } |
12080 | 291 if (_last_strong_code_root_mark_times_ms.sum() > 0.0) { |
292 _last_strong_code_root_mark_times_ms.print(1, "Code Root Marking (ms)"); | |
293 } | |
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294 _last_update_rs_times_ms.print(1, "Update RS (ms)"); |
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295 _last_update_rs_processed_buffers.print(2, "Processed Buffers"); |
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296 _last_scan_rs_times_ms.print(1, "Scan RS (ms)"); |
12080 | 297 _last_strong_code_root_scan_times_ms.print(1, "Code Root Scanning (ms)"); |
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298 _last_obj_copy_times_ms.print(1, "Object Copy (ms)"); |
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299 } |
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300 print_stats(1, "Code Root Fixup", _cur_collection_code_root_fixup_time_ms); |
12080 | 301 print_stats(1, "Code Root Migration", _cur_strong_code_root_migration_time_ms); |
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302 print_stats(1, "Clear CT", _cur_clear_ct_time_ms); |
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303 double misc_time_ms = pause_time_sec * MILLIUNITS - accounted_time_ms(); |
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304 print_stats(1, "Other", misc_time_ms); |
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305 if (_cur_verify_before_time_ms > 0.0) { |
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306 print_stats(2, "Verify Before", _cur_verify_before_time_ms); |
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307 } |
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308 print_stats(2, "Choose CSet", |
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309 (_recorded_young_cset_choice_time_ms + |
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310 _recorded_non_young_cset_choice_time_ms)); |
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311 print_stats(2, "Ref Proc", _cur_ref_proc_time_ms); |
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312 print_stats(2, "Ref Enq", _cur_ref_enq_time_ms); |
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313 print_stats(2, "Free CSet", |
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314 (_recorded_young_free_cset_time_ms + |
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315 _recorded_non_young_free_cset_time_ms)); |
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316 if (_cur_verify_after_time_ms > 0.0) { |
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317 print_stats(2, "Verify After", _cur_verify_after_time_ms); |
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318 } |
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319 } |