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Java example source code file (TestMetaspaceMemoryPool.java)
The TestMetaspaceMemoryPool.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. */ import java.util.List; import java.lang.management.*; import com.oracle.java.testlibrary.*; import static com.oracle.java.testlibrary.Asserts.*; /* @test TestMetaspaceMemoryPool * @bug 8000754 * @summary Tests that a MemoryPoolMXBeans is created for metaspace and that a * MemoryManagerMXBean is created. * @library /testlibrary * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-UseCompressedOops TestMetaspaceMemoryPool * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-UseCompressedOops -XX:MaxMetaspaceSize=60m TestMetaspaceMemoryPool * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+UseCompressedOops -XX:+UseCompressedClassPointers TestMetaspaceMemoryPool * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+UseCompressedOops -XX:+UseCompressedClassPointers -XX:CompressedClassSpaceSize=60m TestMetaspaceMemoryPool */ public class TestMetaspaceMemoryPool { public static void main(String[] args) { verifyThatMetaspaceMemoryManagerExists(); boolean isMetaspaceMaxDefined = InputArguments.containsPrefix("-XX:MaxMetaspaceSize"); verifyMemoryPool(getMemoryPool("Metaspace"), isMetaspaceMaxDefined); if (Platform.is64bit()) { if (InputArguments.contains("-XX:+UseCompressedOops")) { MemoryPoolMXBean cksPool = getMemoryPool("Compressed Class Space"); verifyMemoryPool(cksPool, true); } } } private static void verifyThatMetaspaceMemoryManagerExists() { List<MemoryManagerMXBean> managers = ManagementFactory.getMemoryManagerMXBeans(); for (MemoryManagerMXBean manager : managers) { if (manager.getName().equals("Metaspace Manager")) { return; } } throw new RuntimeException("Expected to find a metaspace memory manager"); } private static MemoryPoolMXBean getMemoryPool(String name) { List<MemoryPoolMXBean> pools = ManagementFactory.getMemoryPoolMXBeans(); for (MemoryPoolMXBean pool : pools) { if (pool.getName().equals(name)) { return pool; } } throw new RuntimeException("Expected to find a memory pool with name " + name); } private static void verifyMemoryPool(MemoryPoolMXBean pool, boolean isMaxDefined) { MemoryUsage mu = pool.getUsage(); long init = mu.getInit(); long used = mu.getUsed(); long committed = mu.getCommitted(); long max = mu.getMax(); assertGTE(init, 0L); assertGTE(used, init); assertGTE(committed, used); if (isMaxDefined) { assertGTE(max, committed); } else { assertEQ(max, -1L); } } } Other Java examples (source code examples)Here is a short list of links related to this Java TestMetaspaceMemoryPool.java source code file: |
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