1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
|
/*
* Copyright (c) 2014, 2018, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
* @test
* @key gc
* @bug 8049831
* @requires !vm.graal.enabled
* @library /test/lib
* @modules java.base/jdk.internal.misc
* java.management
* @build sun.hotspot.WhiteBox
* @run driver ClassFileInstaller sun.hotspot.WhiteBox
* sun.hotspot.WhiteBox$WhiteBoxPermission
* @run driver TestCMSClassUnloadingEnabledHWM
* @summary Test that -XX:-CMSClassUnloadingEnabled will trigger a Full GC when more than MetaspaceSize metadata is allocated.
*/
import jdk.test.lib.process.OutputAnalyzer;
import jdk.test.lib.process.ProcessTools;
import java.lang.management.GarbageCollectorMXBean;
import java.lang.management.ManagementFactory;
import java.util.ArrayList;
import java.util.Arrays;
import sun.hotspot.WhiteBox;
public class TestCMSClassUnloadingEnabledHWM {
private static long MetaspaceSize = 32 * 1024 * 1024;
private static long YoungGenSize = 32 * 1024 * 1024;
private static OutputAnalyzer run(boolean enableUnloading) throws Exception {
ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
"-Xbootclasspath/a:.",
"-XX:+UnlockDiagnosticVMOptions",
"-XX:+WhiteBoxAPI",
"-Xmx128m",
"-XX:CMSMaxAbortablePrecleanTime=1",
"-XX:CMSWaitDuration=50",
"-XX:MetaspaceSize=" + MetaspaceSize,
"-Xmn" + YoungGenSize,
"-XX:+UseConcMarkSweepGC",
"-XX:" + (enableUnloading ? "+" : "-") + "CMSClassUnloadingEnabled",
"-Xlog:gc",
TestCMSClassUnloadingEnabledHWM.AllocateBeyondMetaspaceSize.class.getName(),
"" + MetaspaceSize);
return new OutputAnalyzer(pb.start());
}
public static OutputAnalyzer runWithCMSClassUnloading() throws Exception {
return run(true);
}
public static OutputAnalyzer runWithoutCMSClassUnloading() throws Exception {
return run(false);
}
public static void testWithoutCMSClassUnloading() throws Exception {
// -XX:-CMSClassUnloadingEnabled is used, so we expect a full GC instead of a concurrent cycle.
OutputAnalyzer out = runWithoutCMSClassUnloading();
out.shouldMatch(".*Pause Full.*");
out.shouldNotMatch(".*Pause Initial Mark.*");
}
public static void testWithCMSClassUnloading() throws Exception {
// -XX:+CMSClassUnloadingEnabled is used, so we expect a concurrent cycle instead of a full GC.
OutputAnalyzer out = runWithCMSClassUnloading();
out.shouldMatch(".*Pause Initial Mark.*");
out.shouldNotMatch(".*Pause Full.*");
}
public static void main(String args[]) throws Exception {
testWithCMSClassUnloading();
testWithoutCMSClassUnloading();
}
public static class AllocateBeyondMetaspaceSize {
public static void main(String [] args) throws Exception {
if (args.length != 1) {
throw new IllegalArgumentException("Usage: <MetaspaceSize>");
}
WhiteBox wb = WhiteBox.getWhiteBox();
// Allocate past the MetaspaceSize limit.
long metaspaceSize = Long.parseLong(args[0]);
long allocationBeyondMetaspaceSize = metaspaceSize * 2;
long metaspace = wb.allocateMetaspace(null, allocationBeyondMetaspaceSize);
// Wait for at least one GC to occur. The caller will parse the log files produced.
GarbageCollectorMXBean cmsGCBean = getCMSGCBean();
while (cmsGCBean.getCollectionCount() == 0) {
Thread.sleep(100);
}
wb.freeMetaspace(null, metaspace, metaspace);
}
private static GarbageCollectorMXBean getCMSGCBean() {
for (GarbageCollectorMXBean gcBean : ManagementFactory.getGarbageCollectorMXBeans()) {
if (gcBean.getObjectName().toString().equals("java.lang:type=GarbageCollector,name=ConcurrentMarkSweep")) {
return gcBean;
}
}
return null;
}
}
}
|
