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