| /* |
| * Copyright (c) 2014, 2016, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /** |
| * @test TestDynMinHeapFreeRatio |
| * @bug 8028391 |
| * @summary Verify that MinHeapFreeRatio flag is manageable |
| * @library /test/lib |
| * @modules java.base/jdk.internal.misc |
| * @modules java.management |
| * @run main TestDynMinHeapFreeRatio |
| * @run main/othervm -XX:MinHeapFreeRatio=0 -XX:MaxHeapFreeRatio=100 TestDynMinHeapFreeRatio |
| * @run main/othervm -XX:MinHeapFreeRatio=10 -XX:MaxHeapFreeRatio=50 -XX:-UseAdaptiveSizePolicy TestDynMinHeapFreeRatio |
| * @run main/othervm -XX:MinHeapFreeRatio=10 -XX:MaxHeapFreeRatio=50 TestDynMinHeapFreeRatio |
| * @run main/othervm -XX:MinHeapFreeRatio=51 -XX:MaxHeapFreeRatio=52 TestDynMinHeapFreeRatio |
| * @run main/othervm -XX:MinHeapFreeRatio=75 -XX:MaxHeapFreeRatio=100 TestDynMinHeapFreeRatio |
| */ |
| import static jdk.test.lib.Asserts.assertEQ; |
| import static jdk.test.lib.Asserts.assertFalse; |
| import static jdk.test.lib.Asserts.assertTrue; |
| import jdk.test.lib.management.DynamicVMOption; |
| |
| public class TestDynMinHeapFreeRatio { |
| |
| public static void main(String args[]) throws Exception { |
| |
| // high boundary value |
| int maxValue = DynamicVMOption.getInt("MaxHeapFreeRatio"); |
| System.out.println("MaxHeapFreeRatio= " + maxValue); |
| |
| String badValues[] = { |
| null, |
| "", |
| "not a number", |
| "8.5", "-0.01", |
| Integer.toString(Integer.MIN_VALUE), |
| Integer.toString(Integer.MAX_VALUE), |
| Integer.toString(maxValue + 1), |
| "-1024", "-1", "101", "1997" |
| }; |
| |
| String goodValues[] = { |
| Integer.toString(maxValue), |
| Integer.toString(maxValue - 1), |
| Integer.toString(maxValue / 2), |
| "0", "1" |
| }; |
| |
| // option under test |
| DynamicVMOption option = new DynamicVMOption("MinHeapFreeRatio"); |
| |
| assertTrue(option.isWriteable(), "Option " + option.name |
| + " is expected to be writable"); |
| |
| for (String v : badValues) { |
| assertFalse(option.isValidValue(v), |
| "'" + v + "' is expected to be illegal for flag " + option.name); |
| } |
| |
| for (String v : goodValues) { |
| option.setValue(v); |
| String newValue = option.getValue(); |
| assertEQ(v, newValue); |
| } |
| } |
| } |