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comparison test/gc/metaspace/TestMetaspacePerfCounters.java @ 12063:1a8fb39bdbc4

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8014659: NPG: performance counters for compressed klass space Reviewed-by: mgerdin, coleenp, hseigel, jmasa, ctornqvi
author ehelin
date Wed, 07 Aug 2013 16:47:32 +0200
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children 7944aba7ba41
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12061:e5003079dfa5 12063:1a8fb39bdbc4
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.util.ArrayList;
26
27 import com.oracle.java.testlibrary.*;
28 import static com.oracle.java.testlibrary.Asserts.*;
29
30 /* @test TestMetaspacePerfCounters
31 * @bug 8014659
32 * @library /testlibrary
33 * @summary Tests that performance counters for metaspace and compressed class
34 * space exists and works.
35 *
36 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-UseCompressedOops -XX:-UseCompressedKlassPointers -XX:+UsePerfData -XX:+UseSerialGC TestMetaspacePerfCounters
37 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-UseCompressedOops -XX:-UseCompressedKlassPointers -XX:+UsePerfData -XX:+UseParallelGC -XX:+UseParallelOldGC TestMetaspacePerfCounters
38 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-UseCompressedOops -XX:-UseCompressedKlassPointers -XX:+UsePerfData -XX:+UseG1GC TestMetaspacePerfCounters
39 *
40 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+UseCompressedOops -XX:+UseCompressedKlassPointers -XX:+UsePerfData -XX:+UseSerialGC TestMetaspacePerfCounters
41 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+UseCompressedOops -XX:+UseCompressedKlassPointers -XX:+UsePerfData -XX:+UseParallelGC -XX:+UseParallelOldGC TestMetaspacePerfCounters
42 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+UseCompressedOops -XX:+UseCompressedKlassPointers -XX:+UsePerfData -XX:+UseG1GC TestMetaspacePerfCounters
43 */
44 public class TestMetaspacePerfCounters {
45 public static Class fooClass = null;
46 private static final String[] counterNames = {"minCapacity", "maxCapacity", "capacity", "used"};
47
48 public static void main(String[] args) throws Exception {
49 String metaspace = "sun.gc.metaspace";
50 String ccs = "sun.gc.compressedclassspace";
51
52 checkPerfCounters(metaspace);
53
54 if (isUsingCompressedClassPointers()) {
55 checkPerfCounters(ccs);
56 checkUsedIncreasesWhenLoadingClass(ccs);
57 } else {
58 checkEmptyPerfCounters(ccs);
59 checkUsedIncreasesWhenLoadingClass(metaspace);
60 }
61 }
62
63 private static void checkPerfCounters(String ns) throws Exception {
64 for (PerfCounter counter : countersInNamespace(ns)) {
65 String msg = "Expected " + counter.getName() + " to be larger than 0";
66 assertGT(counter.longValue(), 0L, msg);
67 }
68 }
69
70 private static void checkEmptyPerfCounters(String ns) throws Exception {
71 for (PerfCounter counter : countersInNamespace(ns)) {
72 String msg = "Expected " + counter.getName() + " to equal 0";
73 assertEQ(counter.longValue(), 0L, msg);
74 }
75 }
76
77 private static void checkUsedIncreasesWhenLoadingClass(String ns) throws Exception {
78 PerfCounter used = PerfCounters.findByName(ns + ".used");
79
80 long before = used.longValue();
81 fooClass = compileAndLoad("Foo", "public class Foo { }");
82 System.gc();
83 long after = used.longValue();
84
85 assertGT(after, before);
86 }
87
88 private static List<PerfCounter> countersInNamespace(String ns) throws Exception {
89 List<PerfCounter> counters = new ArrayList<>();
90 for (String name : counterNames) {
91 counters.add(PerfCounters.findByName(ns + "." + name));
92 }
93 return counters;
94 }
95
96 private static Class<?> compileAndLoad(String name, String source) throws Exception {
97 byte[] byteCode = InMemoryJavaCompiler.compile(name, source);
98 return ByteCodeLoader.load(name, byteCode);
99 }
100
101 private static boolean isUsingCompressedClassPointers() {
102 return Platform.is64bit() && InputArguments.contains("-XX:+UseCompressedKlassPointers");
103 }
104 }