1 /* 2 * Copyright (c) 2013, 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 com.oracle.java.testlibrary.*; 27 import static com.oracle.java.testlibrary.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 * @build com.oracle.java.testlibrary.* 35 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-UseCompressedOops TestMetaspaceMemoryPool 36 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-UseCompressedOops -XX:MaxMetaspaceSize=60m TestMetaspaceMemoryPool 37 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+UseCompressedOops -XX:+UseCompressedClassPointers TestMetaspaceMemoryPool 38 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+UseCompressedOops -XX:+UseCompressedClassPointers -XX:CompressedClassSpaceSize=60m TestMetaspaceMemoryPool 39 */ 40 public class TestMetaspaceMemoryPool { 41 public static void main(String[] args) { 42 verifyThatMetaspaceMemoryManagerExists(); 43 44 boolean isMetaspaceMaxDefined = InputArguments.containsPrefix("-XX:MaxMetaspaceSize"); 45 verifyMemoryPool(getMemoryPool("Metaspace"), isMetaspaceMaxDefined); 46 47 if (Platform.is64bit()) { 48 if (InputArguments.contains("-XX:+UseCompressedOops")) { 49 MemoryPoolMXBean cksPool = getMemoryPool("Compressed Class Space"); 50 verifyMemoryPool(cksPool, true); 51 } 52 } 53 } 54 55 private static void verifyThatMetaspaceMemoryManagerExists() { 56 List<MemoryManagerMXBean> managers = ManagementFactory.getMemoryManagerMXBeans(); 57 for (MemoryManagerMXBean manager : managers) { 58 if (manager.getName().equals("Metaspace Manager")) { 59 return; 60 } 61 } 62 63 throw new RuntimeException("Expected to find a metaspace memory manager"); 64 } 65 66 private static MemoryPoolMXBean getMemoryPool(String name) { 67 List<MemoryPoolMXBean> pools = ManagementFactory.getMemoryPoolMXBeans(); 68 for (MemoryPoolMXBean pool : pools) { 69 if (pool.getName().equals(name)) { 70 return pool; 71 } 72 } 73 74 throw new RuntimeException("Expected to find a memory pool with name " + name); 75 } 76 77 private static void verifyMemoryPool(MemoryPoolMXBean pool, boolean isMaxDefined) { 78 MemoryUsage mu = pool.getUsage(); 79 long init = mu.getInit(); 80 long used = mu.getUsed(); 81 long committed = mu.getCommitted(); 82 long max = mu.getMax(); 83 84 assertGTE(init, 0L); 85 assertGTE(used, init); 86 assertGTE(committed, used); 87 88 if (isMaxDefined) { 89 assertGTE(max, committed); 90 } else { 91 assertEQ(max, -1L); 92 } 93 } 94 }