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comparison test/gc/class_unloading/TestCMSClassUnloadingEnabledHWM.java @ 20804:7848fc12602b

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Merge with jdk8u40-b25
author Gilles Duboscq <gilles.m.duboscq@oracle.com>
date Tue, 07 Apr 2015 14:58:49 +0200
parents 85f4c4ecc963
children
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20184:84105dcdb05b 20804:7848fc12602b
1 /*
2 * Copyright (c) 2014, 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 /*
25 * @test
26 * @key gc
27 * @bug 8049831
28 * @library /testlibrary /testlibrary/whitebox
29 * @build TestCMSClassUnloadingEnabledHWM
30 * @run main ClassFileInstaller sun.hotspot.WhiteBox
31 * @run driver TestCMSClassUnloadingEnabledHWM
32 * @summary Test that -XX:-CMSClassUnloadingEnabled will trigger a Full GC when more than MetaspaceSize metadata is allocated.
33 */
34
35 import com.oracle.java.testlibrary.OutputAnalyzer;
36 import com.oracle.java.testlibrary.ProcessTools;
37 import java.lang.management.GarbageCollectorMXBean;
38 import java.lang.management.ManagementFactory;
39 import java.util.ArrayList;
40 import java.util.Arrays;
41 import sun.hotspot.WhiteBox;
42
43 public class TestCMSClassUnloadingEnabledHWM {
44 private static long MetaspaceSize = 32 * 1024 * 1024;
45 private static long YoungGenSize = 32 * 1024 * 1024;
46
47 private static OutputAnalyzer run(boolean enableUnloading) throws Exception {
48 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
49 "-Xbootclasspath/a:.",
50 "-XX:+UnlockDiagnosticVMOptions",
51 "-XX:+WhiteBoxAPI",
52 "-Xmx128m",
53 "-XX:CMSMaxAbortablePrecleanTime=1",
54 "-XX:CMSWaitDuration=50",
55 "-XX:MetaspaceSize=" + MetaspaceSize,
56 "-Xmn" + YoungGenSize,
57 "-XX:+UseConcMarkSweepGC",
58 "-XX:" + (enableUnloading ? "+" : "-") + "CMSClassUnloadingEnabled",
59 "-XX:+PrintHeapAtGC",
60 "-XX:+PrintGCDetails",
61 "-XX:+PrintGCTimeStamps",
62 TestCMSClassUnloadingEnabledHWM.AllocateBeyondMetaspaceSize.class.getName(),
63 "" + MetaspaceSize);
64 return new OutputAnalyzer(pb.start());
65 }
66
67 public static OutputAnalyzer runWithCMSClassUnloading() throws Exception {
68 return run(true);
69 }
70
71 public static OutputAnalyzer runWithoutCMSClassUnloading() throws Exception {
72 return run(false);
73 }
74
75 public static void testWithoutCMSClassUnloading() throws Exception {
76 // -XX:-CMSClassUnloadingEnabled is used, so we expect a full GC instead of a concurrent cycle.
77 OutputAnalyzer out = runWithoutCMSClassUnloading();
78
79 out.shouldMatch(".*Full GC.*");
80 out.shouldNotMatch(".*CMS Initial Mark.*");
81 }
82
83 public static void testWithCMSClassUnloading() throws Exception {
84 // -XX:+CMSClassUnloadingEnabled is used, so we expect a concurrent cycle instead of a full GC.
85 OutputAnalyzer out = runWithCMSClassUnloading();
86
87 out.shouldMatch(".*CMS Initial Mark.*");
88 out.shouldNotMatch(".*Full GC.*");
89 }
90
91 public static void main(String args[]) throws Exception {
92 testWithCMSClassUnloading();
93 testWithoutCMSClassUnloading();
94 }
95
96 public static class AllocateBeyondMetaspaceSize {
97 public static void main(String [] args) throws Exception {
98 if (args.length != 1) {
99 throw new IllegalArgumentException("Usage: <MetaspaceSize>");
100 }
101
102 WhiteBox wb = WhiteBox.getWhiteBox();
103
104 // Allocate past the MetaspaceSize limit.
105 long metaspaceSize = Long.parseLong(args[0]);
106 long allocationBeyondMetaspaceSize = metaspaceSize * 2;
107 long metaspace = wb.allocateMetaspace(null, allocationBeyondMetaspaceSize);
108
109 // Wait for at least one GC to occur. The caller will parse the log files produced.
110 GarbageCollectorMXBean cmsGCBean = getCMSGCBean();
111 while (cmsGCBean.getCollectionCount() == 0) {
112 Thread.sleep(100);
113 }
114
115 wb.freeMetaspace(null, metaspace, metaspace);
116 }
117
118 private static GarbageCollectorMXBean getCMSGCBean() {
119 for (GarbageCollectorMXBean gcBean : ManagementFactory.getGarbageCollectorMXBeans()) {
120 if (gcBean.getObjectName().toString().equals("java.lang:type=GarbageCollector,name=ConcurrentMarkSweep")) {
121 return gcBean;
122 }
123 }
124 return null;
125 }
126 }
127 }
128