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comparison test/gc/class_unloading/TestG1ClassUnloadingHWM.java @ 20282:f3aeae1f9fc5

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8048269: Add flag to turn off class unloading after G1 concurrent mark Summary: Added -XX:+/-ClassUnloadingWithConcurrentMark Reviewed-by: jmasa, brutisso, mgerdin
author stefank
date Wed, 06 Aug 2014 09:55:16 +0200
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children 8a7429682242
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20281:684a5dec6072 20282:f3aeae1f9fc5
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 TestG1ClassUnloadingHWM AllocateBeyondMetaspaceSize
30 * @run main ClassFileInstaller sun.hotspot.WhiteBox
31 * @run driver TestG1ClassUnloadingHWM
32 * @summary Test that -XX:-ClassUnloadingWithConcurrentMark 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
38 import java.util.ArrayList;
39 import java.util.Arrays;
40
41 public class TestG1ClassUnloadingHWM {
42 private static long MetaspaceSize = 32 * 1024 * 1024;
43 private static long YoungGenSize = 32 * 1024 * 1024;
44
45 private static OutputAnalyzer run(boolean enableUnloading) throws Exception {
46 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
47 "-Xbootclasspath/a:.",
48 "-XX:+WhiteBoxAPI",
49 "-XX:MetaspaceSize=" + MetaspaceSize,
50 "-Xmn" + YoungGenSize,
51 "-XX:+UseG1GC",
52 "-XX:" + (enableUnloading ? "+" : "-") + "ClassUnloadingWithConcurrentMark",
53 "-XX:+PrintHeapAtGC",
54 "-XX:+PrintGCDetails",
55 "AllocateBeyondMetaspaceSize",
56 "" + MetaspaceSize,
57 "" + YoungGenSize);
58 return new OutputAnalyzer(pb.start());
59 }
60
61 public static OutputAnalyzer runWithG1ClassUnloading() throws Exception {
62 return run(true);
63 }
64
65 public static OutputAnalyzer runWithoutG1ClassUnloading() throws Exception {
66 return run(false);
67 }
68
69 public static void testWithoutG1ClassUnloading() throws Exception {
70 // -XX:-ClassUnloadingWithConcurrentMark is used, so we expect a full GC instead of a concurrent cycle.
71 OutputAnalyzer out = runWithoutG1ClassUnloading();
72
73 out.shouldMatch(".*Full GC.*");
74 out.shouldNotMatch(".*initial-mark.*");
75 }
76
77 public static void testWithG1ClassUnloading() throws Exception {
78 // -XX:+ClassUnloadingWithConcurrentMark is used, so we expect a concurrent cycle instead of a full GC.
79 OutputAnalyzer out = runWithG1ClassUnloading();
80
81 out.shouldMatch(".*initial-mark.*");
82 out.shouldNotMatch(".*Full GC.*");
83 }
84
85 public static void main(String args[]) throws Exception {
86 testWithG1ClassUnloading();
87 testWithoutG1ClassUnloading();
88 }
89 }
90