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comparison 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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12247:fac394091d73 12248:73d0d0218068
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 * @summary Tests that a MemoryPoolMXBeans and PerfCounters for metaspace
33 * report the same data.
34 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-UseCompressedOops -XX:-UseCompressedKlassPointers -XX:+UseSerialGC -XX:+UsePerfData TestPerfCountersAndMemoryPools
35 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+UseCompressedOops -XX:+UseCompressedKlassPointers -XX:+UseSerialGC -XX:+UsePerfData TestPerfCountersAndMemoryPools
36 */
37 public class TestPerfCountersAndMemoryPools {
38 public static void main(String[] args) throws Exception {
39 checkMemoryUsage("Metaspace", "sun.gc.metaspace");
40
41 if (InputArguments.contains("-XX:+UseCompressedKlassPointers") && Platform.is64bit()) {
42 checkMemoryUsage("Compressed Class Space", "sun.gc.compressedclassspace");
43 }
44 }
45
46 private static MemoryUsage getMemoryUsage(String memoryPoolName) {
47 List<MemoryPoolMXBean> pools = ManagementFactory.getMemoryPoolMXBeans();
48 for (MemoryPoolMXBean pool : pools) {
49 if (pool.getName().equals(memoryPoolName)) {
50 return pool.getUsage();
51 }
52 }
53
54 throw new RuntimeException("Excpted to find a memory pool with name " +
55 memoryPoolName);
56 }
57
58 private static void checkMemoryUsage(String memoryPoolName, String perfNS)
59 throws Exception {
60 // Need to do a gc before each comparison to update the perf counters
61
62 System.gc();
63 MemoryUsage mu = getMemoryUsage(memoryPoolName);
64 assertEQ(getMinCapacity(perfNS), mu.getInit());
65
66 System.gc();
67 mu = getMemoryUsage(memoryPoolName);
68 assertEQ(getUsed(perfNS), mu.getUsed());
69
70 System.gc();
71 mu = getMemoryUsage(memoryPoolName);
72 assertEQ(getCapacity(perfNS), mu.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 }