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comparison test/gc/g1/TestHumongousAllocInitialMark.java @ 12898:6f1919cfd18c

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8023158: hotspot/test/gc/7168848/HumongousAlloc.java fails 14 full gcs, expect 0 full gcs Reviewed-by: brutisso, tschatzl
author pliden
date Tue, 15 Oct 2013 11:38:47 +0200
parents test/gc/7168848/HumongousAlloc.java@9a344d88dc22
children de6a9e811145
comparison
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12895:d6818f623792 12898:6f1919cfd18c
1 /*
2 * Copyright (c) 2012, 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 TestHumongousAllocInitialMark
26 * @bug 7168848
27 * @summary G1: humongous object allocations should initiate marking cycles when necessary
28 * @library /testlibrary
29 */
30
31 import com.oracle.java.testlibrary.*;
32
33 public class TestHumongousAllocInitialMark {
34 private static final int heapSize = 200; // MB
35 private static final int heapRegionSize = 1; // MB
36 private static final int initiatingHeapOccupancyPercent = 50; // %
37
38 public static void main(String[] args) throws Exception {
39 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
40 "-XX:+UseG1GC",
41 "-Xms" + heapSize + "m",
42 "-Xmx" + heapSize + "m",
43 "-XX:G1HeapRegionSize=" + heapRegionSize + "m",
44 "-XX:InitiatingHeapOccupancyPercent=" + initiatingHeapOccupancyPercent,
45 "-XX:+PrintGC",
46 HumongousObjectAllocator.class.getName());
47
48 OutputAnalyzer output = new OutputAnalyzer(pb.start());
49 output.shouldContain("GC pause (G1 Humongous Allocation) (young) (initial-mark)");
50 output.shouldNotContain("Full GC");
51 output.shouldHaveExitValue(0);
52 }
53
54 static class HumongousObjectAllocator {
55 private static byte[] dummy;
56
57 public static void main(String [] args) throws Exception {
58 // Make object size 75% of region size
59 final int humongousObjectSize =
60 (int)(heapRegionSize * 1024 * 1024 * 0.75);
61
62 // Number of objects to allocate to go above IHOP
63 final int humongousObjectAllocations =
64 (int)((heapSize * initiatingHeapOccupancyPercent / 100.0) / heapRegionSize) + 1;
65
66 // Allocate
67 for (int i = 1; i <= humongousObjectAllocations; i++) {
68 System.out.println("Allocating humongous object " + i + "/" + humongousObjectAllocations +
69 " of size " + humongousObjectSize + " bytes");
70 dummy = new byte[humongousObjectSize];
71 }
72 }
73 }
74 }
75