| /* |
| * Copyright (c) 2017, 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 |
| * @bug 6653214 |
| * @requires os.simpleArch=="x64" |
| * @run main/othervm -Xmx3000M LargeHeapThresholdTest |
| * @summary MemoryPoolMXBean.setUsageThreshold() does not support large heap sizes |
| * |
| * Large is >= 2 gigabytes |
| * This test tries to find memory pools with maximum allowable size of at |
| * least 2 gigabytes and set their usage thresholds to this value. If tested |
| * Java implementation is defective |
| * "java.lang.IllegalArgumentException: Invalid threshold value > max value of size_t" |
| * will be thrown. |
| * If no pool with maximum allowable size of at least 2 gigabytes exists |
| * the test passes. There is a good chance that such pool will exist if JVM |
| * is started with '-Xmx3000M' command line switch. |
| */ |
| |
| |
| import java.lang.management.ManagementFactory; |
| import java.lang.management.MemoryPoolMXBean; |
| import java.util.List; |
| |
| |
| public class LargeHeapThresholdTest { |
| |
| final static long TWO_G = ((long) Integer.MAX_VALUE + 1); // 2 gigabytes |
| |
| public static void main(String[] args) { |
| List<MemoryPoolMXBean> pools = ManagementFactory.getMemoryPoolMXBeans(); |
| boolean verified = false; |
| for (MemoryPoolMXBean i : pools) { |
| if ((i.getUsage().getMax() >= TWO_G) |
| && i.isUsageThresholdSupported()) { |
| i.setUsageThreshold(TWO_G); |
| if(i.getUsageThreshold() != TWO_G) |
| throw new RuntimeException("Usage threshold for" |
| + " pool '" + i.getName() + "' is " + i.getUsageThreshold() |
| + " and not equal to 2GB"); |
| verified = true; |
| } |
| } |
| System.out.println("Ability to use big heap thresholds has " |
| + (verified ? "" : "NOT ") + "been verified"); |
| } |
| } |