1 /* 2 * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 #include "precompiled.hpp" 25 #include "services/nmtDCmd.hpp" 26 #include "services/memReporter.hpp" 27 #include "services/memTracker.hpp" 28 #include "utilities/globalDefinitions.hpp" 29 30 NMTDCmd::NMTDCmd(outputStream* output, 31 bool heap): DCmdWithParser(output, heap), 32 _summary("summary", "request runtime to report current memory summary, " \ 33 "which includes total reserved and committed memory, along " \ 34 "with memory usage summary by each subsytem.", 35 "BOOLEAN", false, "false"), 36 _detail("detail", "request runtime to report memory allocation >= " 37 "1K by each callsite.", 38 "BOOLEAN", false, "false"), 39 _baseline("baseline", "request runtime to baseline current memory usage, " \ 40 "so it can be compared against in later time.", 41 "BOOLEAN", false, "false"), 42 _summary_diff("summary.diff", "request runtime to report memory summary " \ 43 "comparison against previous baseline.", 44 "BOOLEAN", false, "false"), 45 _detail_diff("detail.diff", "request runtime to report memory detail " \ 46 "comparison against previous baseline, which shows the memory " \ 47 "allocation activities at different callsites.", 48 "BOOLEAN", false, "false"), 49 _shutdown("shutdown", "request runtime to shutdown itself and free the " \ 50 "memory used by runtime.", 51 "BOOLEAN", false, "false"), 52 #ifndef PRODUCT 53 _debug("debug", "print tracker statistics. Debug only, not thread safe", \ 54 "BOOLEAN", false, "false"), 55 #endif 56 _scale("scale", "Memory usage in which scale, KB, MB or GB", 57 "STRING", false, "KB") { 58 _dcmdparser.add_dcmd_option(&_summary); 59 _dcmdparser.add_dcmd_option(&_detail); 60 _dcmdparser.add_dcmd_option(&_baseline); 61 _dcmdparser.add_dcmd_option(&_summary_diff); 62 _dcmdparser.add_dcmd_option(&_detail_diff); 63 _dcmdparser.add_dcmd_option(&_shutdown); 64 #ifndef PRODUCT 65 _dcmdparser.add_dcmd_option(&_debug); 66 #endif 67 _dcmdparser.add_dcmd_option(&_scale); 68 } 69 70 void NMTDCmd::execute(TRAPS) { 71 const char* scale_value = _scale.value(); 72 size_t scale_unit; 73 if (strcmp(scale_value, "KB") == 0 || strcmp(scale_value, "kb") == 0) { 74 scale_unit = K; 75 } else if (strcmp(scale_value, "MB") == 0 || 76 strcmp(scale_value, "mb") == 0) { 77 scale_unit = M; 78 } else if (strcmp(scale_value, "GB") == 0 || 79 strcmp(scale_value, "gb") == 0) { 80 scale_unit = G; 81 } else { 82 output()->print_cr("Incorrect scale value: %s", scale_value); 83 return; 84 } 85 86 int nopt = 0; 87 if(_summary.is_set()) { ++nopt; } 88 if(_detail.is_set()) { ++nopt; } 89 if(_baseline.is_set()) { ++nopt; } 90 if(_summary_diff.is_set()) { ++nopt; } 91 if(_detail_diff.is_set()) { ++nopt; } 92 if(_shutdown.is_set()) { ++nopt; } 93 #ifndef PRODUCT 94 if(_debug.is_set()) { ++nopt; } 95 #endif 96 97 if(nopt > 1) { 98 output()->print_cr("At most one of the following option can be specified: " \ 99 "summary, detail, baseline, summary.diff, detail.diff, shutdown" 100 #ifndef PRODUCT 101 " ,debug" 102 #endif 103 ); 104 return; 105 } 106 107 if(nopt == 0) { 108 _summary.set_value(true); 109 } 110 111 #ifndef PRODUCT 112 if (_debug.value()) { 113 output()->print_cr("debug command is NOT thread-safe, may cause crash"); 114 MemTracker::print_tracker_stats(output()); 115 return; 116 } 117 #endif 118 119 // native memory tracking has to be on 120 if (!MemTracker::is_on() || MemTracker::shutdown_in_progress()) { 121 // if it is not on, what's the reason? 122 output()->print_cr(MemTracker::reason()); 123 return; 124 } 125 126 if (_summary.value()) { 127 BaselineTTYOutputer outputer(output()); 128 MemTracker::print_memory_usage(outputer, scale_unit, true); 129 } else if (_detail.value()) { 130 BaselineTTYOutputer outputer(output()); 131 MemTracker::print_memory_usage(outputer, scale_unit, false); 132 } else if (_baseline.value()) { 133 if (MemTracker::baseline()) { 134 output()->print_cr("Successfully baselined."); 135 } else { 136 output()->print_cr("Baseline failed."); 137 } 138 } else if (_summary_diff.value()) { 139 if (MemTracker::has_baseline()) { 140 BaselineTTYOutputer outputer(output()); 141 MemTracker::compare_memory_usage(outputer, scale_unit, true); 142 } else { 143 output()->print_cr("No baseline to compare, run 'baseline' command first"); 144 } 145 } else if (_detail_diff.value()) { 146 if (MemTracker::has_baseline()) { 147 BaselineTTYOutputer outputer(output()); 148 MemTracker::compare_memory_usage(outputer, scale_unit, false); 149 } else { 150 output()->print_cr("No baseline to compare to, run 'baseline' command first"); 151 } 152 } else if (_shutdown.value()) { 153 MemTracker::shutdown(MemTracker::NMT_shutdown_user); 154 output()->print_cr("Shutdown is in progress, it will take a few moments to " \ 155 "completely shutdown"); 156 } else { 157 ShouldNotReachHere(); 158 output()->print_cr("Unknown command"); 159 } 160 } 161 162 int NMTDCmd::num_arguments() { 163 ResourceMark rm; 164 NMTDCmd* dcmd = new NMTDCmd(NULL, false); 165 if (dcmd != NULL) { 166 DCmdMark mark(dcmd); 167 return dcmd->_dcmdparser.num_arguments(); 168 } else { 169 return 0; 170 } 171 } 172