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6197
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1 /*
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2 * Copyright (c) 2012, 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 #include "precompiled.hpp"
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25 #include "services/nmtDCmd.hpp"
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26 #include "services/memReporter.hpp"
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27 #include "services/memTracker.hpp"
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28 #include "utilities/globalDefinitions.hpp"
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29
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30 NMTDCmd::NMTDCmd(outputStream* output,
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31 bool heap): DCmdWithParser(output, heap),
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32 _summary("summary", "request runtime to report current memory summary, " \
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33 "which includes total reserved and committed memory, along " \
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34 "with memory usage summary by each subsytem.",
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35 "BOOLEAN", false, "false"),
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36 _detail("detail", "request runtime to report memory allocation >= "
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37 "1K by each callsite.",
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38 "BOOLEAN", false, "false"),
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39 _baseline("baseline", "request runtime to baseline current memory usage, " \
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40 "so it can be compared against in later time.",
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41 "BOOLEAN", false, "false"),
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42 _summary_diff("summary.diff", "request runtime to report memory summary " \
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43 "comparison against previous baseline.",
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44 "BOOLEAN", false, "false"),
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45 _detail_diff("detail.diff", "request runtime to report memory detail " \
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46 "comparison against previous baseline, which shows the memory " \
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47 "allocation activities at different callsites.",
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48 "BOOLEAN", false, "false"),
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49 _shutdown("shutdown", "request runtime to shutdown itself and free the " \
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50 "memory used by runtime.",
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51 "BOOLEAN", false, "false"),
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52 #ifndef PRODUCT
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53 _debug("debug", "print tracker statistics. Debug only, not thread safe", \
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54 "BOOLEAN", false, "false"),
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55 #endif
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56 _scale("scale", "Memory usage in which scale, KB, MB or GB",
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57 "STRING", false, "KB") {
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58 _dcmdparser.add_dcmd_option(&_summary);
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59 _dcmdparser.add_dcmd_option(&_detail);
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60 _dcmdparser.add_dcmd_option(&_baseline);
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61 _dcmdparser.add_dcmd_option(&_summary_diff);
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62 _dcmdparser.add_dcmd_option(&_detail_diff);
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63 _dcmdparser.add_dcmd_option(&_shutdown);
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64 #ifndef PRODUCT
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65 _dcmdparser.add_dcmd_option(&_debug);
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66 #endif
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67 _dcmdparser.add_dcmd_option(&_scale);
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68 }
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69
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70 void NMTDCmd::execute(TRAPS) {
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71 const char* scale_value = _scale.value();
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72 size_t scale_unit;
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73 if (strcmp(scale_value, "KB") == 0 || strcmp(scale_value, "kb") == 0) {
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74 scale_unit = K;
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75 } else if (strcmp(scale_value, "MB") == 0 ||
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76 strcmp(scale_value, "mb") == 0) {
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77 scale_unit = M;
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78 } else if (strcmp(scale_value, "GB") == 0 ||
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79 strcmp(scale_value, "gb") == 0) {
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80 scale_unit = G;
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81 } else {
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82 output()->print_cr("Incorrect scale value: %s", scale_value);
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83 return;
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84 }
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85
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86 int nopt = 0;
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87 if(_summary.is_set()) { ++nopt; }
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88 if(_detail.is_set()) { ++nopt; }
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89 if(_baseline.is_set()) { ++nopt; }
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90 if(_summary_diff.is_set()) { ++nopt; }
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91 if(_detail_diff.is_set()) { ++nopt; }
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92 if(_shutdown.is_set()) { ++nopt; }
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93 #ifndef PRODUCT
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94 if(_debug.is_set()) { ++nopt; }
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95 #endif
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96
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97 if(nopt > 1) {
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98 output()->print_cr("At most one of the following option can be specified: " \
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99 "summary, detail, baseline, summary.diff, detail.diff, shutdown"
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100 #ifndef PRODUCT
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101 " ,debug"
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102 #endif
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103 );
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104 return;
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105 }
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106
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107 if(nopt == 0) {
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108 _summary.set_value(true);
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109 }
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110
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111 #ifndef PRODUCT
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112 if (_debug.value()) {
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113 output()->print_cr("debug command is NOT thread-safe, may cause crash");
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114 MemTracker::print_tracker_stats(output());
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115 return;
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116 }
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117 #endif
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118
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119 // native memory tracking has to be on
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120 if (!MemTracker::is_on() || MemTracker::shutdown_in_progress()) {
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121 // if it is not on, what's the reason?
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122 output()->print_cr(MemTracker::reason());
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123 return;
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124 }
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125
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126 if (_summary.value()) {
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127 BaselineTTYOutputer outputer(output());
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128 MemTracker::print_memory_usage(outputer, scale_unit, true);
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129 } else if (_detail.value()) {
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130 BaselineTTYOutputer outputer(output());
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131 MemTracker::print_memory_usage(outputer, scale_unit, false);
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132 } else if (_baseline.value()) {
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133 if (MemTracker::baseline()) {
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134 output()->print_cr("Successfully baselined.");
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135 } else {
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136 output()->print_cr("Baseline failed.");
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137 }
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138 } else if (_summary_diff.value()) {
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139 if (MemTracker::has_baseline()) {
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140 BaselineTTYOutputer outputer(output());
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141 MemTracker::compare_memory_usage(outputer, scale_unit, true);
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142 } else {
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143 output()->print_cr("No baseline to compare, run 'baseline' command first");
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144 }
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145 } else if (_detail_diff.value()) {
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146 if (MemTracker::has_baseline()) {
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147 BaselineTTYOutputer outputer(output());
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148 MemTracker::compare_memory_usage(outputer, scale_unit, false);
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149 } else {
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150 output()->print_cr("No baseline to compare to, run 'baseline' command first");
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151 }
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152 } else if (_shutdown.value()) {
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153 MemTracker::shutdown(MemTracker::NMT_shutdown_user);
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154 output()->print_cr("Shutdown is in progress, it will take a few moments to " \
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155 "completely shutdown");
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156 } else {
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157 ShouldNotReachHere();
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158 output()->print_cr("Unknown command");
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159 }
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160 }
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161
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162 int NMTDCmd::num_arguments() {
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163 ResourceMark rm;
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164 NMTDCmd* dcmd = new NMTDCmd(NULL, false);
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165 if (dcmd != NULL) {
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166 DCmdMark mark(dcmd);
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167 return dcmd->_dcmdparser.num_arguments();
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168 } else {
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169 return 0;
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170 }
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171 }
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172
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