| /* |
| * Copyright (c) 2013, 2014, 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 TestG1HeapRegionSize |
| * @key gc |
| * @bug 8021879 |
| * @requires vm.gc=="G1" | vm.gc=="null" |
| * @summary Verify that the flag G1HeapRegionSize is updated properly |
| * @run main/othervm -Xmx64m TestG1HeapRegionSize 1048576 |
| * @run main/othervm -XX:G1HeapRegionSize=2m -Xmx64m -XX:+UseG1GC TestG1HeapRegionSize 2097152 |
| * @run main/othervm -XX:G1HeapRegionSize=3m -Xmx64m -XX:+UseG1GC TestG1HeapRegionSize 2097152 |
| * @run main/othervm -XX:G1HeapRegionSize=64m -Xmx256m -XX:+UseG1GC TestG1HeapRegionSize 33554432 |
| */ |
| |
| import sun.management.ManagementFactoryHelper; |
| import com.sun.management.HotSpotDiagnosticMXBean; |
| import com.sun.management.VMOption; |
| |
| public class TestG1HeapRegionSize { |
| |
| public static void main(String[] args) { |
| HotSpotDiagnosticMXBean diagnostic = ManagementFactoryHelper.getDiagnosticMXBean(); |
| |
| String expectedValue = getExpectedValue(args); |
| VMOption option = diagnostic.getVMOption("G1HeapRegionSize"); |
| if (!expectedValue.equals(option.getValue())) { |
| throw new RuntimeException("Wrong value for G1HeapRegionSize. Expected " + expectedValue + " but got " + option.getValue()); |
| } |
| } |
| |
| private static String getExpectedValue(String[] args) { |
| if (args.length != 1) { |
| throw new RuntimeException("Wrong number of arguments. Expected 1 but got " + args.length); |
| } |
| return args[0]; |
| } |
| |
| } |