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annotate test/gc/metaspace/TestMetaspacePerfCounters.java @ 12235:d6c266999345

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8023476: Metaspace capacity > reserved Reviewed-by: stefank, hseigel, mgerdin
author ehelin
date Thu, 12 Sep 2013 10:15:30 +0200
parents 7944aba7ba41
children 73d0d0218068
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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.util.ArrayList;
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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 TestMetaspacePerfCounters
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31 * @bug 8014659
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32 * @library /testlibrary
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33 * @summary Tests that performance counters for metaspace and compressed class
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34 * space exists and works.
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35 *
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36 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-UseCompressedOops -XX:-UseCompressedClassPointers -XX:+UsePerfData -XX:+UseSerialGC TestMetaspacePerfCounters
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37 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-UseCompressedOops -XX:-UseCompressedClassPointers -XX:+UsePerfData -XX:+UseParallelGC -XX:+UseParallelOldGC TestMetaspacePerfCounters
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38 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-UseCompressedOops -XX:-UseCompressedClassPointers -XX:+UsePerfData -XX:+UseG1GC TestMetaspacePerfCounters
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39 *
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40 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+UseCompressedOops -XX:+UseCompressedClassPointers -XX:+UsePerfData -XX:+UseSerialGC TestMetaspacePerfCounters
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41 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+UseCompressedOops -XX:+UseCompressedClassPointers -XX:+UsePerfData -XX:+UseParallelGC -XX:+UseParallelOldGC TestMetaspacePerfCounters
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42 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+UseCompressedOops -XX:+UseCompressedClassPointers -XX:+UsePerfData -XX:+UseG1GC TestMetaspacePerfCounters
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43 */
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44 public class TestMetaspacePerfCounters {
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45 public static Class fooClass = null;
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46 private static final String[] counterNames = {"minCapacity", "maxCapacity", "capacity", "used"};
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47
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48 public static void main(String[] args) throws Exception {
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49 String metaspace = "sun.gc.metaspace";
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50 String ccs = "sun.gc.compressedclassspace";
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51
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52 checkPerfCounters(metaspace);
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53
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54 if (isUsingCompressedClassPointers()) {
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55 checkPerfCounters(ccs);
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56 checkUsedIncreasesWhenLoadingClass(ccs);
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57 } else {
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58 checkEmptyPerfCounters(ccs);
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59 checkUsedIncreasesWhenLoadingClass(metaspace);
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60 }
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61 }
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62
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63 private static void checkPerfCounters(String ns) throws Exception {
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64 for (PerfCounter counter : countersInNamespace(ns)) {
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65 String msg = "Expected " + counter.getName() + " to be larger than 0";
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66 assertGT(counter.longValue(), 0L, msg);
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67 }
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68 }
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69
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70 private static void checkEmptyPerfCounters(String ns) throws Exception {
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71 for (PerfCounter counter : countersInNamespace(ns)) {
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72 String msg = "Expected " + counter.getName() + " to equal 0";
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73 assertEQ(counter.longValue(), 0L, msg);
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74 }
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75 }
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76
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77 private static void checkUsedIncreasesWhenLoadingClass(String ns) throws Exception {
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78 PerfCounter used = PerfCounters.findByName(ns + ".used");
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79
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80 long before = used.longValue();
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81 fooClass = compileAndLoad("Foo", "public class Foo { }");
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82 System.gc();
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83 long after = used.longValue();
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84
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85 assertGT(after, before);
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86 }
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87
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88 private static List<PerfCounter> countersInNamespace(String ns) throws Exception {
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89 List<PerfCounter> counters = new ArrayList<>();
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90 for (String name : counterNames) {
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91 counters.add(PerfCounters.findByName(ns + "." + name));
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92 }
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93 return counters;
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94 }
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95
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96 private static Class<?> compileAndLoad(String name, String source) throws Exception {
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97 byte[] byteCode = InMemoryJavaCompiler.compile(name, source);
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98 return ByteCodeLoader.load(name, byteCode);
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99 }
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100
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101 private static boolean isUsingCompressedClassPointers() {
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102 return Platform.is64bit() && InputArguments.contains("-XX:+UseCompressedClassPointers");
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103 }
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104 }