1 /* 2 * Copyright (c) 2013, 2015, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 import java.util.List; 25 import java.lang.management.*; 26 import jdk.test.lib.*; 27 import static jdk.test.lib.Asserts.*; 28 29 /* @test TestMetaspaceMemoryPool 30 * @bug 8000754 31 * @summary Tests that a MemoryPoolMXBeans is created for metaspace and that a 32 * MemoryManagerMXBean is created. 33 * @library /testlibrary 34 * @modules java.base/jdk.internal.misc 35 * java.management 36 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-UseCompressedOops TestMetaspaceMemoryPool 37 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-UseCompressedOops -XX:MaxMetaspaceSize=60m TestMetaspaceMemoryPool 38 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+UseCompressedOops -XX:+UseCompressedClassPointers TestMetaspaceMemoryPool 39 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+UseCompressedOops -XX:+UseCompressedClassPointers -XX:CompressedClassSpaceSize=60m TestMetaspaceMemoryPool 40 */ 41 public class TestMetaspaceMemoryPool { 42 public static void main(String[] args) { 43 verifyThatMetaspaceMemoryManagerExists(); 44 45 boolean isMetaspaceMaxDefined = InputArguments.containsPrefix("-XX:MaxMetaspaceSize"); 46 verifyMemoryPool(getMemoryPool("Metaspace"), isMetaspaceMaxDefined); 47 48 if (Platform.is64bit()) { 49 if (InputArguments.contains("-XX:+UseCompressedOops")) { 50 MemoryPoolMXBean cksPool = getMemoryPool("Compressed Class Space"); 51 verifyMemoryPool(cksPool, true); 52 } 53 } 54 } 55 56 private static void verifyThatMetaspaceMemoryManagerExists() { 57 List<MemoryManagerMXBean> managers = ManagementFactory.getMemoryManagerMXBeans(); 58 for (MemoryManagerMXBean manager : managers) { 59 if (manager.getName().equals("Metaspace Manager")) { 60 return; 61 } 62 } 63 64 throw new RuntimeException("Expected to find a metaspace memory manager"); 65 } 66 67 private static MemoryPoolMXBean getMemoryPool(String name) { 68 List<MemoryPoolMXBean> pools = ManagementFactory.getMemoryPoolMXBeans(); 69 for (MemoryPoolMXBean pool : pools) { 70 if (pool.getName().equals(name)) { 71 return pool; 72 } 73 } 74 75 throw new RuntimeException("Expected to find a memory pool with name " + name); 76 } 77 78 private static void verifyMemoryPool(MemoryPoolMXBean pool, boolean isMaxDefined) { 79 MemoryUsage mu = pool.getUsage(); 80 long init = mu.getInit(); 81 long used = mu.getUsed(); 82 long committed = mu.getCommitted(); 83 long max = mu.getMax(); 84 85 assertGTE(init, 0L); 86 assertGTE(used, init); 87 assertGTE(committed, used); 88 89 if (isMaxDefined) { 90 assertGTE(max, committed); 91 } else { 92 assertEQ(max, -1L); 93 } 94 } 95 }