alvinalexander.com | career | drupal | java | mac | mysql | perl | scala | uml | unix  

Java example source code file (PrintNMTStatistics.java)

This example Java source code file (PrintNMTStatistics.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

api, call, exception, heap, java, nmtwaitfordatamerge, printnmtstatistics, processbuilder, regex, xbootclasspath/a, xx:+unlockdiagnosticvmoptions, xx\:\+printnmtstatistics, xx\:\+whiteboxapi, xx\:nativememorytracking\=summary

The PrintNMTStatistics.java Java example source code

/*
 * 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.
 */

/*
 * @test
 * @key nmt regression
 * @bug 8005936
 * @summary Make sure PrintNMTStatistics works on normal JVM exit
 * @library /testlibrary /testlibrary/whitebox
 * @build PrintNMTStatistics
 * @run main ClassFileInstaller sun.hotspot.WhiteBox
 * @run main PrintNMTStatistics
 */

import com.oracle.java.testlibrary.*;

import java.util.regex.Matcher;
import java.util.regex.Pattern;
import sun.hotspot.WhiteBox;

public class PrintNMTStatistics {

  public static void main(String args[]) throws Exception {

    // We start a new java process running with an argument and use WB API to ensure
    // we have data for NMT on VM exit
    if (args.length > 0) {
      // Use WB API to ensure that all data has been merged before we continue
      if (!WhiteBox.getWhiteBox().NMTWaitForDataMerge()) {
        throw new Exception("Call to WB API NMTWaitForDataMerge() failed");
      }
      return;
    }

    ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
        "-XX:+UnlockDiagnosticVMOptions",
        "-Xbootclasspath/a:.",
        "-XX:+WhiteBoxAPI",
        "-XX:NativeMemoryTracking=summary",
        "-XX:+PrintNMTStatistics",
        "PrintNMTStatistics",
        "test");

    OutputAnalyzer output = new OutputAnalyzer(pb.start());
    output.shouldContain("Java Heap (reserved=");
    output.shouldNotContain("error");
    output.shouldNotContain("warning");
    output.shouldHaveExitValue(0);
  }
}

Other Java examples (source code examples)

Here is a short list of links related to this Java PrintNMTStatistics.java source code file:

... this post is sponsored by my books ...

#1 New Release!

FP Best Seller

 

new blog posts

 

Copyright 1998-2024 Alvin Alexander, alvinalexander.com
All Rights Reserved.

A percentage of advertising revenue from
pages under the /java/jwarehouse URI on this website is
paid back to open source projects.