1 /* |
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2 * Copyright 2001-2007 Sun Microsystems, Inc. All Rights Reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. |
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8 * |
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9 * This code is distributed in the hope that it will be useful, but WITHOUT |
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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12 * version 2 for more details (a copy is included in the LICENSE file that |
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13 * accompanied this code). |
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14 * |
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15 * You should have received a copy of the GNU General Public License version |
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16 * 2 along with this work; if not, write to the Free Software Foundation, |
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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18 * |
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
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20 * CA 95054 USA or visit www.sun.com if you need additional information or |
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21 * have any questions. |
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22 * |
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23 */ |
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24 |
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25 # include "incls/_precompiled.incl" |
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26 # include "incls/_gcOverheadReporter.cpp.incl" |
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27 |
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28 class COReportingThread : public ConcurrentGCThread { |
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29 private: |
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30 GCOverheadReporter* _reporter; |
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31 |
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32 public: |
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33 COReportingThread(GCOverheadReporter* reporter) : _reporter(reporter) { |
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34 guarantee( _reporter != NULL, "precondition" ); |
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35 create_and_start(); |
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36 } |
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37 |
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38 virtual void run() { |
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39 initialize_in_thread(); |
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40 wait_for_universe_init(); |
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41 |
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42 int period_ms = GCOverheadReportingPeriodMS; |
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43 |
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44 while ( true ) { |
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45 os::sleep(Thread::current(), period_ms, false); |
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46 |
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47 _sts.join(); |
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48 double now_sec = os::elapsedTime(); |
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49 _reporter->collect_and_record_conc_overhead(now_sec); |
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50 _sts.leave(); |
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51 } |
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52 |
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53 terminate(); |
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54 } |
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55 }; |
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56 |
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57 GCOverheadReporter* GCOverheadReporter::_reporter = NULL; |
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58 |
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59 GCOverheadReporter::GCOverheadReporter(size_t group_num, |
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60 const char* group_names[], |
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61 size_t length) |
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62 : _group_num(group_num), _prev_end_sec(0.0) { |
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63 guarantee( 0 <= group_num && group_num <= MaxGCOverheadGroupNum, |
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64 "precondition" ); |
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65 |
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66 _base = NEW_C_HEAP_ARRAY(GCOverheadReporterEntry, length); |
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67 _top = _base + length; |
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68 _curr = _base; |
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69 |
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70 for (size_t i = 0; i < group_num; ++i) { |
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71 guarantee( group_names[i] != NULL, "precondition" ); |
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72 _group_names[i] = group_names[i]; |
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73 } |
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74 } |
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75 |
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76 void |
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77 GCOverheadReporter::add(double start_sec, double end_sec, |
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78 double* conc_overhead, |
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79 double stw_overhead) { |
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80 assert( _curr <= _top, "invariant" ); |
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81 |
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82 if (_curr == _top) { |
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83 guarantee( false, "trace full" ); |
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84 return; |
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85 } |
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86 |
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87 _curr->_start_sec = start_sec; |
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88 _curr->_end_sec = end_sec; |
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89 for (size_t i = 0; i < _group_num; ++i) { |
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90 _curr->_conc_overhead[i] = |
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91 (conc_overhead != NULL) ? conc_overhead[i] : 0.0; |
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92 } |
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93 _curr->_stw_overhead = stw_overhead; |
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94 |
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95 ++_curr; |
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96 } |
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97 |
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98 void |
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99 GCOverheadReporter::collect_and_record_conc_overhead(double end_sec) { |
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100 double start_sec = _prev_end_sec; |
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101 guarantee( end_sec > start_sec, "invariant" ); |
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102 |
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103 double conc_overhead[MaxGCOverheadGroupNum]; |
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104 COTracker::totalConcOverhead(end_sec, _group_num, conc_overhead); |
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105 add_conc_overhead(start_sec, end_sec, conc_overhead); |
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106 _prev_end_sec = end_sec; |
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107 } |
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108 |
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109 void |
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110 GCOverheadReporter::record_stw_start(double start_sec) { |
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111 guarantee( start_sec > _prev_end_sec, "invariant" ); |
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112 collect_and_record_conc_overhead(start_sec); |
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113 } |
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114 |
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115 void |
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116 GCOverheadReporter::record_stw_end(double end_sec) { |
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117 double start_sec = _prev_end_sec; |
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118 COTracker::updateAllForSTW(start_sec, end_sec); |
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119 add_stw_overhead(start_sec, end_sec, 1.0); |
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120 |
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121 _prev_end_sec = end_sec; |
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122 } |
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123 |
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124 void |
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125 GCOverheadReporter::print() const { |
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126 tty->print_cr(""); |
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127 tty->print_cr("GC Overhead (%d entries)", _curr - _base); |
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128 tty->print_cr(""); |
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129 GCOverheadReporterEntry* curr = _base; |
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130 while (curr < _curr) { |
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131 double total = curr->_stw_overhead; |
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132 for (size_t i = 0; i < _group_num; ++i) |
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133 total += curr->_conc_overhead[i]; |
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134 |
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135 tty->print("OVERHEAD %12.8lf %12.8lf ", |
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136 curr->_start_sec, curr->_end_sec); |
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137 |
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138 for (size_t i = 0; i < _group_num; ++i) |
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139 tty->print("%s %12.8lf ", _group_names[i], curr->_conc_overhead[i]); |
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140 |
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141 tty->print_cr("STW %12.8lf TOT %12.8lf", curr->_stw_overhead, total); |
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142 ++curr; |
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143 } |
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144 tty->print_cr(""); |
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145 } |
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146 |
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147 // statics |
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148 |
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149 void |
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150 GCOverheadReporter::initGCOverheadReporter(size_t group_num, |
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151 const char* group_names[]) { |
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152 guarantee( _reporter == NULL, "should only be called once" ); |
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153 guarantee( 0 <= group_num && group_num <= MaxGCOverheadGroupNum, |
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154 "precondition" ); |
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155 guarantee( group_names != NULL, "pre-condition" ); |
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156 |
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157 if (GCOverheadReporting) { |
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158 _reporter = new GCOverheadReporter(group_num, group_names); |
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159 new COReportingThread(_reporter); |
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160 } |
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161 } |
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162 |
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163 void |
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164 GCOverheadReporter::recordSTWStart(double start_sec) { |
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165 if (_reporter != NULL) |
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166 _reporter->record_stw_start(start_sec); |
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167 } |
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168 |
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169 void |
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170 GCOverheadReporter::recordSTWEnd(double end_sec) { |
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171 if (_reporter != NULL) |
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172 _reporter->record_stw_end(end_sec); |
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173 } |
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174 |
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175 void |
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176 GCOverheadReporter::printGCOverhead() { |
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177 if (_reporter != NULL) |
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178 _reporter->print(); |
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179 } |
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