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annotate test/gc/metaspace/TestPerfCountersAndMemoryPools.java @ 12248:73d0d0218068

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8024718: Metaspace performance counters and memory pools should report the same data Reviewed-by: stefank, dholmes, coleenp
author ehelin
date Tue, 17 Sep 2013 20:59:07 +0200
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children 6e22e7042433
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1 /*
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2 * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23
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24 import java.util.List;
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25 import java.lang.management.*;
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26
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27 import com.oracle.java.testlibrary.*;
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28 import static com.oracle.java.testlibrary.Asserts.*;
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29
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30 /* @test TestPerfCountersAndMemoryPools
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31 * @bug 8023476
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32 * @summary Tests that a MemoryPoolMXBeans and PerfCounters for metaspace
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33 * report the same data.
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34 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-UseCompressedOops -XX:-UseCompressedKlassPointers -XX:+UseSerialGC -XX:+UsePerfData TestPerfCountersAndMemoryPools
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35 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+UseCompressedOops -XX:+UseCompressedKlassPointers -XX:+UseSerialGC -XX:+UsePerfData TestPerfCountersAndMemoryPools
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36 */
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37 public class TestPerfCountersAndMemoryPools {
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38 public static void main(String[] args) throws Exception {
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39 checkMemoryUsage("Metaspace", "sun.gc.metaspace");
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40
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41 if (InputArguments.contains("-XX:+UseCompressedKlassPointers") && Platform.is64bit()) {
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42 checkMemoryUsage("Compressed Class Space", "sun.gc.compressedclassspace");
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43 }
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44 }
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45
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46 private static MemoryUsage getMemoryUsage(String memoryPoolName) {
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47 List<MemoryPoolMXBean> pools = ManagementFactory.getMemoryPoolMXBeans();
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48 for (MemoryPoolMXBean pool : pools) {
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49 if (pool.getName().equals(memoryPoolName)) {
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50 return pool.getUsage();
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51 }
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52 }
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53
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54 throw new RuntimeException("Excpted to find a memory pool with name " +
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55 memoryPoolName);
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56 }
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57
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58 private static void checkMemoryUsage(String memoryPoolName, String perfNS)
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59 throws Exception {
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60 // Need to do a gc before each comparison to update the perf counters
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61
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62 System.gc();
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63 MemoryUsage mu = getMemoryUsage(memoryPoolName);
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64 assertEQ(getMinCapacity(perfNS), mu.getInit());
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65
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66 System.gc();
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67 mu = getMemoryUsage(memoryPoolName);
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68 assertEQ(getUsed(perfNS), mu.getUsed());
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69
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70 System.gc();
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71 mu = getMemoryUsage(memoryPoolName);
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72 assertEQ(getCapacity(perfNS), mu.getCommitted());
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73 }
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74
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75 private static long getMinCapacity(String ns) throws Exception {
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76 return PerfCounters.findByName(ns + ".minCapacity").longValue();
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77 }
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78
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79 private static long getCapacity(String ns) throws Exception {
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80 return PerfCounters.findByName(ns + ".capacity").longValue();
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81 }
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82
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83 private static long getUsed(String ns) throws Exception {
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84 return PerfCounters.findByName(ns + ".used").longValue();
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85 }
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86 }