1 /* 2 * Copyright (c) 2018, 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/metaspace.hpp" 26 #include "memory/metaspace/metaspaceDCmd.hpp" 27 #include "memory/resourceArea.hpp" 28 #include "services/diagnosticCommand.hpp" 29 #include "services/nmtCommon.hpp" 30 31 namespace metaspace { 32 33 MetaspaceDCmd::MetaspaceDCmd(outputStream* output, bool heap) 34 : DCmdWithParser(output, heap) 35 , _basic("basic", "Prints a basic summary (does not need a safepoint).", "BOOLEAN", false, "false") 36 , _show_loaders("show-loaders", "Shows usage by class loader.", "BOOLEAN", false, "false") 37 , _by_chunktype("by-chunktype", "Break down numbers by chunk type.", "BOOLEAN", false, "false") 38 , _by_spacetype("by-spacetype", "Break down numbers by loader type.", "BOOLEAN", false, "false") 39 , _show_vslist("vslist", "Shows details about the underlying virtual space.", "BOOLEAN", false, "false") 40 , _show_vsmap("vsmap", "Shows chunk composition of the underlying virtual spaces", "BOOLEAN", false, "false") 41 , _scale("scale", "Memory usage in which to scale. Valid values are: 1, KB, MB or GB (fixed scale) " 42 "or \"dynamic\" for a dynamically choosen scale.", 43 "STRING", false, "dynamic") 44 { 45 _dcmdparser.add_dcmd_option(&_basic); 46 _dcmdparser.add_dcmd_option(&_show_loaders); 47 _dcmdparser.add_dcmd_option(&_by_chunktype); 48 _dcmdparser.add_dcmd_option(&_by_spacetype); 49 _dcmdparser.add_dcmd_option(&_show_vslist); 50 _dcmdparser.add_dcmd_option(&_show_vsmap); 51 _dcmdparser.add_dcmd_option(&_scale); 52 } 53 54 int MetaspaceDCmd::num_arguments() { 55 ResourceMark rm; 56 MetaspaceDCmd* dcmd = new MetaspaceDCmd(NULL, false); 57 if (dcmd != NULL) { 58 DCmdMark mark(dcmd); 59 return dcmd->_dcmdparser.num_arguments(); 60 } else { 61 return 0; 62 } 63 } 64 65 void MetaspaceDCmd::execute(DCmdSource source, TRAPS) { 66 // Parse scale value. 67 const char* scale_value = _scale.value(); 68 size_t scale = 0; 69 if (scale_value != NULL) { 70 if (strcasecmp("dynamic", scale_value) == 0) { 71 scale = 0; 72 } else { 73 scale = NMT_ONLY(NMTUtil::scale_from_name(scale_value)) NOT_NMT(0); 74 if (scale == 0) { 75 output()->print_cr("Invalid scale: \"%s\". Will use dynamic scaling.", scale_value); 76 } 77 } 78 } 79 if (_basic.value() == true) { 80 if (_show_loaders.value() || _by_chunktype.value() || _by_spacetype.value() || 81 _show_vslist.value() || _show_vsmap.value()) { 82 // Basic mode. Just print essentials. Does not need to be at a safepoint. 83 output()->print_cr("In basic mode, additional arguments are ignored."); 84 } 85 MetaspaceUtils::print_basic_report(output(), scale); 86 } else { 87 // Full mode. Requires safepoint. 88 int flags = 0; 89 if (_show_loaders.value()) flags |= MetaspaceUtils::rf_show_loaders; 90 if (_by_chunktype.value()) flags |= MetaspaceUtils::rf_break_down_by_chunktype; 91 if (_by_spacetype.value()) flags |= MetaspaceUtils::rf_break_down_by_spacetype; 92 if (_show_vslist.value()) flags |= MetaspaceUtils::rf_show_vslist; 93 if (_show_vsmap.value()) flags |= MetaspaceUtils::rf_show_vsmap; 94 VM_PrintMetadata op(output(), scale, flags); 95 VMThread::execute(&op); 96 } 97 } 98 99 } // namespace metaspace 100