1 /* 2 * Copyright (c) 2013, 2019, 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 package gc.metaspace; 25 26 import java.util.List; 27 import java.lang.management.*; 28 29 import jdk.test.lib.Platform; 30 import static jdk.test.lib.Asserts.*; 31 import gc.testlibrary.PerfCounters; 32 33 /* @test TestPerfCountersAndMemoryPools 34 * @bug 8023476 35 * @library /test/lib / 36 * @requires vm.gc.Serial 37 * @summary Tests that a MemoryPoolMXBeans and PerfCounters for metaspace 38 * report the same data. 39 * @modules java.base/jdk.internal.misc 40 * java.management 41 * jdk.internal.jvmstat/sun.jvmstat.monitor 42 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-UseCompressedOops -XX:-UseCompressedClassPointers -XX:+UseSerialGC -XX:+UsePerfData -Xint gc.metaspace.TestPerfCountersAndMemoryPools 43 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+UseCompressedOops -XX:+UseCompressedClassPointers -XX:+UseSerialGC -XX:+UsePerfData -Xint gc.metaspace.TestPerfCountersAndMemoryPools 44 */ 45 public class TestPerfCountersAndMemoryPools { main(String[] args)46 public static void main(String[] args) throws Exception { 47 checkMemoryUsage("Metaspace", "sun.gc.metaspace"); 48 49 if (InputArguments.contains("-XX:+UseCompressedClassPointers") && Platform.is64bit()) { 50 checkMemoryUsage("Compressed Class Space", "sun.gc.compressedclassspace"); 51 } 52 } 53 getMemoryPool(String memoryPoolName)54 private static MemoryPoolMXBean getMemoryPool(String memoryPoolName) { 55 List<MemoryPoolMXBean> pools = ManagementFactory.getMemoryPoolMXBeans(); 56 for (MemoryPoolMXBean pool : pools) { 57 if (pool.getName().equals(memoryPoolName)) { 58 return pool; 59 } 60 } 61 62 throw new RuntimeException("Excpted to find a memory pool with name " + 63 memoryPoolName); 64 } 65 checkMemoryUsage(String memoryPoolName, String perfNS)66 private static void checkMemoryUsage(String memoryPoolName, String perfNS) 67 throws Exception { 68 MemoryPoolMXBean pool = getMemoryPool(memoryPoolName); 69 70 // First, call all the methods to let them allocate their own slab of metadata 71 getMinCapacity(perfNS); 72 getCapacity(perfNS); 73 getUsed(perfNS); 74 pool.getUsage().getInit(); 75 pool.getUsage().getUsed(); 76 pool.getUsage().getCommitted(); 77 assertEQ(1L, 1L, "Make assert load"); 78 79 // Must do a GC to update performance counters 80 System.gc(); 81 assertEQ(getMinCapacity(perfNS), pool.getUsage().getInit(), "MinCapacity out of sync"); 82 83 // Adding a second GC due to metadata allocations caused by getting the 84 // initial size from the pool. This is needed when running with -Xcomp. 85 System.gc(); 86 assertEQ(getUsed(perfNS), pool.getUsage().getUsed(), "Used out of sync"); 87 assertEQ(getCapacity(perfNS), pool.getUsage().getCommitted(), "Committed out of sync"); 88 } 89 getMinCapacity(String ns)90 private static long getMinCapacity(String ns) throws Exception { 91 return PerfCounters.findByName(ns + ".minCapacity").longValue(); 92 } 93 getCapacity(String ns)94 private static long getCapacity(String ns) throws Exception { 95 return PerfCounters.findByName(ns + ".capacity").longValue(); 96 } 97 getUsed(String ns)98 private static long getUsed(String ns) throws Exception { 99 return PerfCounters.findByName(ns + ".used").longValue(); 100 } 101 } 102