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 import static com.oracle.java.testlibrary.Asserts.assertEQ; 25 import static com.oracle.java.testlibrary.Asserts.assertFalse; 26 import static com.oracle.java.testlibrary.Asserts.assertTrue; 27 import com.oracle.java.testlibrary.DynamicVMOption; 28 29 /** 30 * @test TestDynMaxHeapFreeRatio 31 * @bug 8028391 32 * @summary Verify that MaxHeapFreeRatio flag is manageable 33 * @library /testlibrary 34 * @run main TestDynMaxHeapFreeRatio 35 * @run main/othervm -XX:MinHeapFreeRatio=0 -XX:MaxHeapFreeRatio=100 TestDynMaxHeapFreeRatio 36 * @run main/othervm -XX:MinHeapFreeRatio=10 -XX:MaxHeapFreeRatio=50 -XX:-UseAdaptiveSizePolicy TestDynMaxHeapFreeRatio 37 * @run main/othervm -XX:MinHeapFreeRatio=10 -XX:MaxHeapFreeRatio=50 TestDynMaxHeapFreeRatio 38 * @run main/othervm -XX:MinHeapFreeRatio=51 -XX:MaxHeapFreeRatio=52 TestDynMaxHeapFreeRatio 39 * @run main/othervm -XX:MinHeapFreeRatio=75 -XX:MaxHeapFreeRatio=100 TestDynMaxHeapFreeRatio 40 */ 41 public class TestDynMaxHeapFreeRatio { 42 43 public static void main(String args[]) throws Exception { 44 45 // low boundary value 46 int minValue = DynamicVMOption.getInt("MinHeapFreeRatio"); 47 System.out.println("MinHeapFreeRatio= " + minValue); 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(minValue - 1), 57 "-1024", "-1", "101", "1997" 58 }; 59 60 String goodValues[] = { 61 Integer.toString(minValue), 62 Integer.toString(minValue + 1), 63 Integer.toString((minValue + 100) / 2), 64 "99", "100" 65 }; 66 67 DynamicVMOption option = new DynamicVMOption("MaxHeapFreeRatio"); 68 69 assertTrue(option.isWriteable(), "Option " + option.name 70 + " is expected to be writable"); 71 72 for (String v : badValues) { 73 assertFalse(option.isValidValue(v), 74 "'" + v + "' is expected to be illegal for flag " + option.name); 75 } 76 for (String v : goodValues) { 77 option.setValue(v); 78 String newValue = option.getValue(); 79 assertEQ(v, newValue); 80 } 81 } 82 }