1 /* 2 * Copyright (c) 2014, 2019, 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 package gc.arguments; 25 26 /** 27 * @test TestDynMinHeapFreeRatio 28 * @bug 8028391 29 * @summary Verify that MinHeapFreeRatio flag is manageable 30 * @library /test/lib 31 * @modules java.base/jdk.internal.misc 32 * @modules java.management 33 * @run main gc.arguments.TestDynMinHeapFreeRatio 34 * @run main/othervm -XX:MinHeapFreeRatio=0 -XX:MaxHeapFreeRatio=100 gc.arguments.TestDynMinHeapFreeRatio 35 * @run main/othervm -XX:MinHeapFreeRatio=10 -XX:MaxHeapFreeRatio=50 -XX:-UseAdaptiveSizePolicy gc.arguments.TestDynMinHeapFreeRatio 36 * @run main/othervm -XX:MinHeapFreeRatio=10 -XX:MaxHeapFreeRatio=50 gc.arguments.TestDynMinHeapFreeRatio 37 * @run main/othervm -XX:MinHeapFreeRatio=51 -XX:MaxHeapFreeRatio=52 gc.arguments.TestDynMinHeapFreeRatio 38 * @run main/othervm -XX:MinHeapFreeRatio=75 -XX:MaxHeapFreeRatio=100 gc.arguments.TestDynMinHeapFreeRatio 39 */ 40 import static jdk.test.lib.Asserts.assertEQ; 41 import static jdk.test.lib.Asserts.assertFalse; 42 import static jdk.test.lib.Asserts.assertTrue; 43 import jdk.test.lib.management.DynamicVMOption; 44 45 public class TestDynMinHeapFreeRatio { 46 main(String args[])47 public static void main(String args[]) throws Exception { 48 49 // high boundary value 50 int maxValue = DynamicVMOption.getInt("MaxHeapFreeRatio"); 51 System.out.println("MaxHeapFreeRatio= " + maxValue); 52 53 String badValues[] = { 54 null, 55 "", 56 "not a number", 57 "8.5", "-0.01", 58 Integer.toString(Integer.MIN_VALUE), 59 Integer.toString(Integer.MAX_VALUE), 60 Integer.toString(maxValue + 1), 61 "-1024", "-1", "101", "1997" 62 }; 63 64 String goodValues[] = { 65 Integer.toString(maxValue), 66 Integer.toString(maxValue - 1), 67 Integer.toString(maxValue / 2), 68 "0", "1" 69 }; 70 71 // option under test 72 DynamicVMOption option = new DynamicVMOption("MinHeapFreeRatio"); 73 74 assertTrue(option.isWriteable(), "Option " + option.name 75 + " is expected to be writable"); 76 77 for (String v : badValues) { 78 assertFalse(option.isValidValue(v), 79 "'" + v + "' is expected to be illegal for flag " + option.name); 80 } 81 82 for (String v : goodValues) { 83 option.setValue(v); 84 String newValue = option.getValue(); 85 assertEQ(v, newValue); 86 } 87 } 88 } 89