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comparison test/compiler/6885584/Test6885584.java @ 1009:03b336640699

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6885584: A particular class structure causes large allocation spike for jit Reviewed-by: kvn
author never
date Wed, 07 Oct 2009 15:38:37 -0700
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children c18cbe5936b8
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1008:e90521d61f9a 1009:03b336640699
1 /*
2 * Copyright 2009 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
24
25 /**
26 * @test
27 * @bug 6885584
28 * @summary A particular class structure causes large allocation spike for jit
29 *
30 * @run main/othervm -Xbatch Test6885584
31 */
32
33
34
35 public class Test6885584 {
36 static private int i1;
37 static private int i2;
38 static private int i3;
39
40 static int limit = Integer.MAX_VALUE - 8;
41
42 public static void main(String args[]) {
43 // Run long enough to trigger an OSR
44 for(int j = 200000; j != 0; j--) {
45 }
46
47 // This must reference a field
48 i1 = i2;
49
50 // The resource leak is roughly proportional to this initial value
51 for(int k = Integer.MAX_VALUE - 1; k != 0; k--) {
52 // Make sure the body does some work
53 if(i2 > i3)i1 = k;
54 if (k <= limit) break;
55 }
56 }
57
58 }