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comparison test/gc/g1/TestShrinkToOneRegion.java @ 10242:b0d20fa374b4

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8013872: G1: HeapRegionSeq::shrink_by() has invalid assert Summary: Refactored shrink_by() to only use region counts and not byte sizes Reviewed-by: johnc, tschatzl
author brutisso
date Mon, 06 May 2013 21:30:34 +0200
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10241:d17700c82d7d 10242:b0d20fa374b4
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 TestShrinkToOneRegion.java
26 * @bug 8013872
27 * @summary Shrinking the heap down to one region used to hit an assert
28 * @run main/othervm -XX:+UseG1GC -XX:G1HeapRegionSize=32m -Xmx256m TestShrinkToOneRegion
29 *
30 * Doing a System.gc() without having allocated many objects will shrink the heap.
31 * With a large region size we will shrink the heap to one region.
32 */
33 public class TestShrinkToOneRegion {
34 public static void main(String[] args) {
35 System.gc();
36 }
37 }