1/* 2 * Copyright (c) 2012, 2015, 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 "memory/resourceArea.hpp" 26#include "runtime/mutexLocker.hpp" 27#include "services/nmtDCmd.hpp" 28#include "services/memReporter.hpp" 29#include "services/memTracker.hpp" 30#include "utilities/globalDefinitions.hpp" 31 32NMTDCmd::NMTDCmd(outputStream* output, 33 bool heap): DCmdWithParser(output, heap), 34 _summary("summary", "request runtime to report current memory summary, " \ 35 "which includes total reserved and committed memory, along " \ 36 "with memory usage summary by each subsytem.", 37 "BOOLEAN", false, "false"), 38 _detail("detail", "request runtime to report memory allocation >= " 39 "1K by each callsite.", 40 "BOOLEAN", false, "false"), 41 _baseline("baseline", "request runtime to baseline current memory usage, " \ 42 "so it can be compared against in later time.", 43 "BOOLEAN", false, "false"), 44 _summary_diff("summary.diff", "request runtime to report memory summary " \ 45 "comparison against previous baseline.", 46 "BOOLEAN", false, "false"), 47 _detail_diff("detail.diff", "request runtime to report memory detail " \ 48 "comparison against previous baseline, which shows the memory " \ 49 "allocation activities at different callsites.", 50 "BOOLEAN", false, "false"), 51 _shutdown("shutdown", "request runtime to shutdown itself and free the " \ 52 "memory used by runtime.", 53 "BOOLEAN", false, "false"), 54 _statistics("statistics", "print tracker statistics for tuning purpose.", \ 55 "BOOLEAN", false, "false"), 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 _dcmdparser.add_dcmd_option(&_statistics); 65 _dcmdparser.add_dcmd_option(&_scale); 66} 67 68 69size_t NMTDCmd::get_scale(const char* scale) const { 70 if (scale == NULL) return 0; 71 return NMTUtil::scale_from_name(scale); 72} 73 74void NMTDCmd::execute(DCmdSource source, TRAPS) { 75 // Check NMT state 76 // native memory tracking has to be on 77 if (MemTracker::tracking_level() == NMT_off) { 78 output()->print_cr("Native memory tracking is not enabled"); 79 return; 80 } else if (MemTracker::tracking_level() == NMT_minimal) { 81 output()->print_cr("Native memory tracking has been shutdown"); 82 return; 83 } 84 85 const char* scale_value = _scale.value(); 86 size_t scale_unit = get_scale(scale_value); 87 if (scale_unit == 0) { 88 output()->print_cr("Incorrect scale value: %s", scale_value); 89 return; 90 } 91 92 int nopt = 0; 93 if (_summary.is_set() && _summary.value()) { ++nopt; } 94 if (_detail.is_set() && _detail.value()) { ++nopt; } 95 if (_baseline.is_set() && _baseline.value()) { ++nopt; } 96 if (_summary_diff.is_set() && _summary_diff.value()) { ++nopt; } 97 if (_detail_diff.is_set() && _detail_diff.value()) { ++nopt; } 98 if (_shutdown.is_set() && _shutdown.value()) { ++nopt; } 99 if (_statistics.is_set() && _statistics.value()) { ++nopt; } 100 101 if (nopt > 1) { 102 output()->print_cr("At most one of the following option can be specified: " \ 103 "summary, detail, baseline, summary.diff, detail.diff, shutdown"); 104 return; 105 } else if (nopt == 0) { 106 if (_summary.is_set()) { 107 output()->print_cr("No command to execute"); 108 return; 109 } else { 110 _summary.set_value(true); 111 } 112 } 113 114 // Serialize NMT query 115 MutexLocker locker(MemTracker::query_lock()); 116 117 if (_summary.value()) { 118 report(true, scale_unit); 119 } else if (_detail.value()) { 120 if (!check_detail_tracking_level(output())) { 121 return; 122 } 123 report(false, scale_unit); 124 } else if (_baseline.value()) { 125 MemBaseline& baseline = MemTracker::get_baseline(); 126 if (!baseline.baseline(MemTracker::tracking_level() != NMT_detail)) { 127 output()->print_cr("Baseline failed"); 128 } else { 129 output()->print_cr("Baseline succeeded"); 130 } 131 } else if (_summary_diff.value()) { 132 MemBaseline& baseline = MemTracker::get_baseline(); 133 if (baseline.baseline_type() >= MemBaseline::Summary_baselined) { 134 report_diff(true, scale_unit); 135 } else { 136 output()->print_cr("No baseline for comparison"); 137 } 138 } else if (_detail_diff.value()) { 139 if (!check_detail_tracking_level(output())) { 140 return; 141 } 142 MemBaseline& baseline = MemTracker::get_baseline(); 143 if (baseline.baseline_type() == MemBaseline::Detail_baselined) { 144 report_diff(false, scale_unit); 145 } else { 146 output()->print_cr("No detail baseline for comparison"); 147 } 148 } else if (_shutdown.value()) { 149 MemTracker::shutdown(); 150 output()->print_cr("Native memory tracking has been turned off"); 151 } else if (_statistics.value()) { 152 if (check_detail_tracking_level(output())) { 153 MemTracker::tuning_statistics(output()); 154 } 155 } else { 156 ShouldNotReachHere(); 157 output()->print_cr("Unknown command"); 158 } 159} 160 161int NMTDCmd::num_arguments() { 162 ResourceMark rm; 163 NMTDCmd* dcmd = new NMTDCmd(NULL, false); 164 if (dcmd != NULL) { 165 DCmdMark mark(dcmd); 166 return dcmd->_dcmdparser.num_arguments(); 167 } else { 168 return 0; 169 } 170} 171 172void NMTDCmd::report(bool summaryOnly, size_t scale_unit) { 173 MemBaseline baseline; 174 if (baseline.baseline(summaryOnly)) { 175 if (summaryOnly) { 176 MemSummaryReporter rpt(baseline, output(), scale_unit); 177 rpt.report(); 178 } else { 179 MemDetailReporter rpt(baseline, output(), scale_unit); 180 rpt.report(); 181 } 182 } 183} 184 185void NMTDCmd::report_diff(bool summaryOnly, size_t scale_unit) { 186 MemBaseline& early_baseline = MemTracker::get_baseline(); 187 assert(early_baseline.baseline_type() != MemBaseline::Not_baselined, 188 "Not yet baselined"); 189 assert(summaryOnly || early_baseline.baseline_type() == MemBaseline::Detail_baselined, 190 "Not a detail baseline"); 191 192 MemBaseline baseline; 193 if (baseline.baseline(summaryOnly)) { 194 if (summaryOnly) { 195 MemSummaryDiffReporter rpt(early_baseline, baseline, output(), scale_unit); 196 rpt.report_diff(); 197 } else { 198 MemDetailDiffReporter rpt(early_baseline, baseline, output(), scale_unit); 199 rpt.report_diff(); 200 } 201 } 202} 203 204bool NMTDCmd::check_detail_tracking_level(outputStream* out) { 205 if (MemTracker::tracking_level() == NMT_detail) { 206 return true; 207 } else if (MemTracker::cmdline_tracking_level() == NMT_detail) { 208 out->print_cr("Tracking level has been downgraded due to lack of resources"); 209 return false; 210 } else { 211 out->print_cr("Detail tracking is not enabled"); 212 return false; 213 } 214} 215