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Java example source code file (TestRegionAlignment.java)

This example Java source code file (TestRegionAlignment.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.

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testregionalignment

The TestRegionAlignment.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 TestRegionAlignment.java
 * @bug 8013791
 * @summary Make sure that G1 ergonomics pick a heap size that is aligned with the region size
 * @run main/othervm -XX:+UseG1GC -XX:G1HeapRegionSize=32m -XX:MaxRAM=555m TestRegionAlignment
 *
 * When G1 ergonomically picks a maximum heap size it must be aligned to the region size.
 * This test tries to get the VM to pick a small and unaligned heap size (by using MaxRAM=555) and a
 * large region size (by using -XX:G1HeapRegionSize=32m). This will fail without the fix for 8013791.
 */
public class TestRegionAlignment {
    public static void main(String[] args) { }
}

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