71 lines
2.7 KiB
Java
71 lines
2.7 KiB
Java
/*
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* Copyright (c) 2013 Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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import java.util.regex.Matcher;
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import java.util.regex.Pattern;
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import sun.management.ManagementFactoryHelper;
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import com.sun.management.DiagnosticCommandMBean;
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public class NMTHelper
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{
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public static void baseline() {
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executeDcmd("vmNativeMemory", "baseline");
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}
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// Total: reserved=3484685KB +293KB, committed=266629KB +293KB
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private static Pattern totalLine = Pattern.compile("^Total: reserved=\\d+KB .*KB, committed=\\d+KB (.*)KB$");
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public static long committedDiff() throws Exception {
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String res = (String) executeDcmd("vmNativeMemory", "detail.diff");
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String[] lines = res.split("\n");
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for (String line : lines) {
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Matcher matcher = totalLine.matcher(line);
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if (matcher.matches()) {
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String committed = matcher.group(1);
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return Long.parseLong(committed);
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}
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}
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throw new Exception("Could not find the Total line in the NMT output.");
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}
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private static String executeDcmd(String cmd, String ... args) {
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DiagnosticCommandMBean dcmd = ManagementFactoryHelper.getDiagnosticCommandMBean();
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Object[] dcmdArgs = {args};
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String[] signature = {String[].class.getName()};
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try {
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System.out.print("> " + cmd + " ");
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for (String s : args) {
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System.out.print(s + " ");
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}
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System.out.println(":");
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String result = (String) dcmd.invoke(cmd, dcmdArgs, signature);
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System.out.println(result);
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return result;
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} catch(Exception ex) {
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ex.printStackTrace();
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}
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return null;
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}
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}
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