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