Mercurial > hg > truffle
comparison test/runtime/Metaspace/FragmentMetaspaceSimple.java @ 10447:638387729ddf
Merge.
author | Christian Humer <christian.humer@gmail.com> |
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date | Thu, 20 Jun 2013 19:10:40 +0200 |
parents | 699d9df07e59 |
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10446:746fa60be266 | 10447:638387729ddf |
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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 /** | |
25 * @test | |
26 * @library /runtime/testlibrary | |
27 * @library classes | |
28 * @build test.Empty ClassUnloadCommon | |
29 * @run main/othervm/timeout=200 FragmentMetaspaceSimple | |
30 */ | |
31 | |
32 import java.util.ArrayList; | |
33 | |
34 /** | |
35 * Test that tries to fragment the native memory used by class loaders. | |
36 * Keeps every other class loader alive in order to fragment the memory space | |
37 * used to store classes and meta data. Since the memory is probably allocated in | |
38 * chunks per class loader this will cause a lot of fragmentation if not handled | |
39 * properly since every other chunk will be unused. | |
40 */ | |
41 public class FragmentMetaspaceSimple { | |
42 public static void main(String... args) { | |
43 runSimple(Long.valueOf(System.getProperty("time", "80000"))); | |
44 System.gc(); | |
45 } | |
46 | |
47 private static void runSimple(long time) { | |
48 long startTime = System.currentTimeMillis(); | |
49 ArrayList<ClassLoader> cls = new ArrayList<>(); | |
50 for (int i = 0; System.currentTimeMillis() < startTime + time; ++i) { | |
51 ClassLoader ldr = ClassUnloadCommon.newClassLoader(); | |
52 if (i % 1000 == 0) { | |
53 cls.clear(); | |
54 } | |
55 // only keep every other class loader alive | |
56 if (i % 2 == 1) { | |
57 cls.add(ldr); | |
58 } | |
59 Class<?> c = null; | |
60 try { | |
61 c = ldr.loadClass("test.Empty"); | |
62 } catch (ClassNotFoundException ex) { | |
63 throw new RuntimeException(ex); | |
64 } | |
65 c = null; | |
66 } | |
67 cls = null; | |
68 } | |
69 } |