1/* 2 * Copyright (c) 2013, 2017, 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 24import java.util.List; 25import java.lang.management.*; 26 27import jdk.test.lib.Platform; 28import static jdk.test.lib.Asserts.*; 29 30/* @test TestPerfCountersAndMemoryPools 31 * @bug 8023476 32 * @library /test/lib 33 * @requires vm.gc.Serial 34 * @summary Tests that a MemoryPoolMXBeans and PerfCounters for metaspace 35 * report the same data. 36 * @modules java.base/jdk.internal.misc 37 * java.management 38 * jdk.internal.jvmstat/sun.jvmstat.monitor 39 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-UseCompressedOops -XX:-UseCompressedClassPointers -XX:+UseSerialGC -XX:+UsePerfData -Xint TestPerfCountersAndMemoryPools 40 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+UseCompressedOops -XX:+UseCompressedClassPointers -XX:+UseSerialGC -XX:+UsePerfData -Xint TestPerfCountersAndMemoryPools 41 */ 42public class TestPerfCountersAndMemoryPools { 43 public static void main(String[] args) throws Exception { 44 checkMemoryUsage("Metaspace", "sun.gc.metaspace"); 45 46 if (InputArguments.contains("-XX:+UseCompressedClassPointers") && Platform.is64bit()) { 47 checkMemoryUsage("Compressed Class Space", "sun.gc.compressedclassspace"); 48 } 49 } 50 51 private static MemoryPoolMXBean getMemoryPool(String memoryPoolName) { 52 List<MemoryPoolMXBean> pools = ManagementFactory.getMemoryPoolMXBeans(); 53 for (MemoryPoolMXBean pool : pools) { 54 if (pool.getName().equals(memoryPoolName)) { 55 return pool; 56 } 57 } 58 59 throw new RuntimeException("Excpted to find a memory pool with name " + 60 memoryPoolName); 61 } 62 63 private static void checkMemoryUsage(String memoryPoolName, String perfNS) 64 throws Exception { 65 MemoryPoolMXBean pool = getMemoryPool(memoryPoolName); 66 67 // First, call all the methods to let them allocate their own slab of metadata 68 getMinCapacity(perfNS); 69 getCapacity(perfNS); 70 getUsed(perfNS); 71 pool.getUsage().getInit(); 72 pool.getUsage().getUsed(); 73 pool.getUsage().getCommitted(); 74 assertEQ(1L, 1L, "Make assert load"); 75 76 // Must do a GC to update performance counters 77 System.gc(); 78 assertEQ(getMinCapacity(perfNS), pool.getUsage().getInit(), "MinCapacity out of sync"); 79 80 // Adding a second GC due to metadata allocations caused by getting the 81 // initial size from the pool. This is needed when running with -Xcomp. 82 System.gc(); 83 assertEQ(getUsed(perfNS), pool.getUsage().getUsed(), "Used out of sync"); 84 assertEQ(getCapacity(perfNS), pool.getUsage().getCommitted(), "Committed out of sync"); 85 } 86 87 private static long getMinCapacity(String ns) throws Exception { 88 return PerfCounters.findByName(ns + ".minCapacity").longValue(); 89 } 90 91 private static long getCapacity(String ns) throws Exception { 92 return PerfCounters.findByName(ns + ".capacity").longValue(); 93 } 94 95 private static long getUsed(String ns) throws Exception { 96 return PerfCounters.findByName(ns + ".used").longValue(); 97 } 98} 99