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comparison test/gc/g1/TestRegionAlignment.java @ 10239:f14063dcd52a

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8013791: G1: G1CollectorPolicy::initialize_flags() may set min_alignment > max_alignment Summary: Make sure max alignemnt is at least as large as min alignment Reviewed-by: johnc, jmasa, tschatzl
author brutisso
date Mon, 06 May 2013 09:16:14 +0200
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10238:1d0fba8a2a6d 10239:f14063dcd52a
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 TestRegionAlignment.java
26 * @bug 8013791
27 * @summary Make sure that G1 ergonomics pick a heap size that is aligned with the region size
28 * @run main/othervm -XX:+UseG1GC -XX:G1HeapRegionSize=32m -XX:MaxRAM=555m TestRegionAlignment
29 *
30 * When G1 ergonomically picks a maximum heap size it must be aligned to the region size.
31 * This test tries to get the VM to pick a small and unaligned heap size (by using MaxRAM=555) and a
32 * large region size (by using -XX:G1HeapRegionSize=32m). This will fail without the fix for 8013791.
33 */
34 public class TestRegionAlignment {
35 public static void main(String[] args) { }
36 }