TestDynMinHeapFreeRatio.java revision 6461:8ec72dcefd74 
1/*
2 * Copyright (c) 2014, 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 TestDynMinHeapFreeRatio
26 * @bug 8028391
27 * @summary Verify that MinHeapFreeRatio flag is manageable
28 * @library /testlibrary
29 * @run main TestDynMinHeapFreeRatio
30 * @run main/othervm -XX:MinHeapFreeRatio=0 -XX:MaxHeapFreeRatio=100 TestDynMinHeapFreeRatio
31 * @run main/othervm -XX:MinHeapFreeRatio=10 -XX:MaxHeapFreeRatio=50 -XX:-UseAdaptiveSizePolicy TestDynMinHeapFreeRatio
32 * @run main/othervm -XX:MinHeapFreeRatio=10 -XX:MaxHeapFreeRatio=50 TestDynMinHeapFreeRatio
33 * @run main/othervm -XX:MinHeapFreeRatio=51 -XX:MaxHeapFreeRatio=52 TestDynMinHeapFreeRatio
34 * @run main/othervm -XX:MinHeapFreeRatio=75 -XX:MaxHeapFreeRatio=100 TestDynMinHeapFreeRatio
35 */
36import static com.oracle.java.testlibrary.Asserts.assertEQ;
37import static com.oracle.java.testlibrary.Asserts.assertFalse;
38import static com.oracle.java.testlibrary.Asserts.assertTrue;
39import com.oracle.java.testlibrary.DynamicVMOption;
40
41public class TestDynMinHeapFreeRatio {
42
43    public static void main(String args[]) throws Exception {
44
45        // high boundary value
46        int maxValue = DynamicVMOption.getInt("MaxHeapFreeRatio");
47        System.out.println("MaxHeapFreeRatio= " + maxValue);
48
49        String badValues[] = {
50            null,
51            "",
52            "not a number",
53            "8.5", "-0.01",
54            Integer.toString(Integer.MIN_VALUE),
55            Integer.toString(Integer.MAX_VALUE),
56            Integer.toString(maxValue + 1),
57            "-1024", "-1", "101", "1997"
58        };
59
60        String goodValues[] = {
61            Integer.toString(maxValue),
62            Integer.toString(maxValue - 1),
63            Integer.toString(maxValue / 2),
64            "0", "1"
65        };
66
67        // option under test
68        DynamicVMOption option = new DynamicVMOption("MinHeapFreeRatio");
69
70        assertTrue(option.isWriteable(), "Option " + option.name
71                + " is expected to be writable");
72
73        for (String v : badValues) {
74            assertFalse(option.isValidValue(v),
75                    "'" + v + "' is expected to be illegal for flag " + option.name);
76        }
77
78        for (String v : goodValues) {
79            option.setValue(v);
80            String newValue = option.getValue();
81            assertEQ(v, newValue);
82        }
83    }
84}
85