Mercurial > jdk8-mips64-public > hotspot / file comparison
comparison: test/gc/metaspace/TestPerfCountersAndMemoryPools.java
test/gc/metaspace/TestPerfCountersAndMemoryPools.java
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| 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 | |
| 27 import com.oracle.java.testlibrary.*; | |
| 28 import static com.oracle.java.testlibrary.Asserts.*; | |
| 29 | |
| 30 /* @test TestPerfCountersAndMemoryPools | |
| 31 * @bug 8023476 | |
| 32 * @library /testlibrary | |
| 33 * @summary Tests that a MemoryPoolMXBeans and PerfCounters for metaspace | |
| 34 * report the same data. | |
| 35 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-UseCompressedOops -XX:-UseCompressedKlassPointers -XX:+UseSerialGC -XX:+UsePerfData -Xint TestPerfCountersAndMemoryPools | |
| 36 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+UseCompressedOops -XX:+UseCompressedKlassPointers -XX:+UseSerialGC -XX:+UsePerfData -Xint TestPerfCountersAndMemoryPools | |
| 37 */ | |
| 38 public class TestPerfCountersAndMemoryPools { | |
| 39 public static void main(String[] args) throws Exception { | |
| 40 checkMemoryUsage("Metaspace", "sun.gc.metaspace"); | |
| 41 | |
| 42 if (InputArguments.contains("-XX:+UseCompressedKlassPointers") && Platform.is64bit()) { | |
| 43 checkMemoryUsage("Compressed Class Space", "sun.gc.compressedclassspace"); | |
| 44 } | |
| 45 } | |
| 46 | |
| 47 private static MemoryPoolMXBean getMemoryPool(String memoryPoolName) { | |
| 48 List<MemoryPoolMXBean> pools = ManagementFactory.getMemoryPoolMXBeans(); | |
| 49 for (MemoryPoolMXBean pool : pools) { | |
| 50 if (pool.getName().equals(memoryPoolName)) { | |
| 51 return pool; | |
| 52 } | |
| 53 } | |
| 54 | |
| 55 throw new RuntimeException("Excpted to find a memory pool with name " + | |
| 56 memoryPoolName); | |
| 57 } | |
| 58 | |
| 59 private static void checkMemoryUsage(String memoryPoolName, String perfNS) | |
| 60 throws Exception { | |
| 61 MemoryPoolMXBean pool = getMemoryPool(memoryPoolName); | |
| 62 | |
| 63 // Must do a GC to update performance counters | |
| 64 System.gc(); | |
| 65 assertEQ(getMinCapacity(perfNS), pool.getUsage().getInit()); | |
| 66 | |
| 67 // Must do a second GC to update the perfomance counters again, since | |
| 68 // the call pool.getUsage().getInit() could have allocated some | |
| 69 // metadata. | |
| 70 System.gc(); | |
| 71 assertEQ(getUsed(perfNS), pool.getUsage().getUsed()); | |
| 72 assertEQ(getCapacity(perfNS), pool.getUsage().getCommitted()); | |
| 73 } | |
| 74 | |
| 75 private static long getMinCapacity(String ns) throws Exception { | |
| 76 return PerfCounters.findByName(ns + ".minCapacity").longValue(); | |
| 77 } | |
| 78 | |
| 79 private static long getCapacity(String ns) throws Exception { | |
| 80 return PerfCounters.findByName(ns + ".capacity").longValue(); | |
| 81 } | |
| 82 | |
| 83 private static long getUsed(String ns) throws Exception { | |
| 84 return PerfCounters.findByName(ns + ".used").longValue(); | |
| 85 } | |
| 86 } |
