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annotate test/gc/metaspace/TestPerfCountersAndMemoryPools.java @ 18408:2c3666f44855

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Truffle: initial commit of object API implementation
author Andreas Woess <andreas.woess@jku.at>
date Tue, 18 Nov 2014 23:19:43 +0100
parents 6e22e7042433
children
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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 * @library /testlibrary
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33 * @summary Tests that a MemoryPoolMXBeans and PerfCounters for metaspace
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34 * report the same data.
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35 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-UseCompressedOops -XX:-UseCompressedKlassPointers -XX:+UseSerialGC -XX:+UsePerfData -Xint TestPerfCountersAndMemoryPools
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36 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+UseCompressedOops -XX:+UseCompressedKlassPointers -XX:+UseSerialGC -XX:+UsePerfData -Xint TestPerfCountersAndMemoryPools
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37 */
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38 public class TestPerfCountersAndMemoryPools {
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39 public static void main(String[] args) throws Exception {
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40 checkMemoryUsage("Metaspace", "sun.gc.metaspace");
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41
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42 if (InputArguments.contains("-XX:+UseCompressedKlassPointers") && Platform.is64bit()) {
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43 checkMemoryUsage("Compressed Class Space", "sun.gc.compressedclassspace");
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44 }
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45 }
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46
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47 private static MemoryPoolMXBean getMemoryPool(String memoryPoolName) {
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48 List<MemoryPoolMXBean> pools = ManagementFactory.getMemoryPoolMXBeans();
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49 for (MemoryPoolMXBean pool : pools) {
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50 if (pool.getName().equals(memoryPoolName)) {
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51 return pool;
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52 }
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53 }
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54
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55 throw new RuntimeException("Excpted to find a memory pool with name " +
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56 memoryPoolName);
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57 }
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58
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59 private static void checkMemoryUsage(String memoryPoolName, String perfNS)
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60 throws Exception {
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61 MemoryPoolMXBean pool = getMemoryPool(memoryPoolName);
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62
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63 // Must do a GC to update performance counters
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64 System.gc();
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65 assertEQ(getMinCapacity(perfNS), pool.getUsage().getInit());
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66
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67 // Must do a second GC to update the perfomance counters again, since
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68 // the call pool.getUsage().getInit() could have allocated some
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69 // metadata.
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70 System.gc();
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71 assertEQ(getUsed(perfNS), pool.getUsage().getUsed());
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72 assertEQ(getCapacity(perfNS), pool.getUsage().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 }