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comparison test/gc/metaspace/TestMetaspaceMemoryPool.java @ 11039:71963b3f802a

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8013590: NPG: Add a memory pool MXBean for Metaspace Reviewed-by: jmasa, mgerdin
author ehelin
date Wed, 26 Jun 2013 16:58:37 +0200
parents
children 7944aba7ba41
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11038:f99cd6e20ab1 11039:71963b3f802a
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.ManagementFactory;
26 import java.lang.management.MemoryManagerMXBean;
27 import java.lang.management.MemoryPoolMXBean;
28 import java.lang.management.MemoryUsage;
29
30 import java.lang.management.RuntimeMXBean;
31 import java.lang.management.ManagementFactory;
32
33 /* @test TestMetaspaceMemoryPool
34 * @bug 8000754
35 * @summary Tests that a MemoryPoolMXBeans is created for metaspace and that a
36 * MemoryManagerMXBean is created.
37 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-UseCompressedOops TestMetaspaceMemoryPool
38 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-UseCompressedOops -XX:MaxMetaspaceSize=60m TestMetaspaceMemoryPool
39 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+UseCompressedOops -XX:+UseCompressedKlassPointers TestMetaspaceMemoryPool
40 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+UseCompressedOops -XX:+UseCompressedKlassPointers -XX:ClassMetaspaceSize=60m TestMetaspaceMemoryPool
41 */
42 public class TestMetaspaceMemoryPool {
43 public static void main(String[] args) {
44 verifyThatMetaspaceMemoryManagerExists();
45 verifyMemoryPool(getMemoryPool("Metaspace"), isFlagDefined("MaxMetaspaceSize"));
46
47 if (runsOn64bit()) {
48 if (usesCompressedOops()) {
49 MemoryPoolMXBean cksPool = getMemoryPool("Compressed Class Space");
50 verifyMemoryPool(cksPool, true);
51 }
52 }
53 }
54
55 private static boolean runsOn64bit() {
56 return !System.getProperty("sun.arch.data.model").equals("32");
57 }
58
59 private static boolean usesCompressedOops() {
60 return isFlagDefined("+UseCompressedOops");
61 }
62
63 private static boolean isFlagDefined(String name) {
64 RuntimeMXBean runtimeMxBean = ManagementFactory.getRuntimeMXBean();
65 List<String> args = runtimeMxBean.getInputArguments();
66 for (String arg : args) {
67 if (arg.startsWith("-XX:" + name)) {
68 return true;
69 }
70 }
71 return false;
72 }
73
74 private static void verifyThatMetaspaceMemoryManagerExists() {
75 List<MemoryManagerMXBean> managers = ManagementFactory.getMemoryManagerMXBeans();
76 for (MemoryManagerMXBean manager : managers) {
77 if (manager.getName().equals("Metaspace Manager")) {
78 return;
79 }
80 }
81
82 throw new RuntimeException("Expected to find a metaspace memory manager");
83 }
84
85 private static MemoryPoolMXBean getMemoryPool(String name) {
86 List<MemoryPoolMXBean> pools = ManagementFactory.getMemoryPoolMXBeans();
87 for (MemoryPoolMXBean pool : pools) {
88 if (pool.getName().equals(name)) {
89 return pool;
90 }
91 }
92
93 throw new RuntimeException("Expected to find a memory pool with name " + name);
94 }
95
96 private static void verifyMemoryPool(MemoryPoolMXBean pool, boolean isMaxDefined) {
97 MemoryUsage mu = pool.getUsage();
98 assertDefined(mu.getInit(), "init");
99 assertDefined(mu.getUsed(), "used");
100 assertDefined(mu.getCommitted(), "committed");
101
102 if (isMaxDefined) {
103 assertDefined(mu.getMax(), "max");
104 } else {
105 assertUndefined(mu.getMax(), "max");
106 }
107 }
108
109 private static void assertDefined(long value, String name) {
110 assertTrue(value != -1, "Expected " + name + " to be defined");
111 }
112
113 private static void assertUndefined(long value, String name) {
114 assertEquals(value, -1, "Expected " + name + " to be undefined");
115 }
116
117 private static void assertEquals(long actual, long expected, String msg) {
118 assertTrue(actual == expected, msg);
119 }
120
121 private static void assertTrue(boolean condition, String msg) {
122 if (!condition) {
123 throw new RuntimeException(msg);
124 }
125 }
126 }