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 import static jdk.test.lib.Asserts.assertEQ; 27 import static jdk.test.lib.Asserts.assertFalse; 28 import static jdk.test.lib.Asserts.assertTrue; 29 import jdk.test.lib.management.DynamicVMOption; 30 31 /** 32 * @test TestDynMaxHeapFreeRatio 33 * @bug 8028391 34 * @summary Verify that MaxHeapFreeRatio flag is manageable 35 * @library /test/lib 36 * @modules java.base/jdk.internal.misc 37 * @modules java.management 38 * @run main gc.arguments.TestDynMaxHeapFreeRatio 39 * @run main/othervm -XX:MinHeapFreeRatio=0 -XX:MaxHeapFreeRatio=100 gc.arguments.TestDynMaxHeapFreeRatio 40 * @run main/othervm -XX:MinHeapFreeRatio=10 -XX:MaxHeapFreeRatio=50 -XX:-UseAdaptiveSizePolicy gc.arguments.TestDynMaxHeapFreeRatio 41 * @run main/othervm -XX:MinHeapFreeRatio=10 -XX:MaxHeapFreeRatio=50 gc.arguments.TestDynMaxHeapFreeRatio 42 * @run main/othervm -XX:MinHeapFreeRatio=51 -XX:MaxHeapFreeRatio=52 gc.arguments.TestDynMaxHeapFreeRatio 43 * @run main/othervm -XX:MinHeapFreeRatio=75 -XX:MaxHeapFreeRatio=100 gc.arguments.TestDynMaxHeapFreeRatio 44 */ 45 public class TestDynMaxHeapFreeRatio { 46 main(String args[])47 public static void main(String args[]) throws Exception { 48 49 // low boundary value 50 int minValue = DynamicVMOption.getInt("MinHeapFreeRatio"); 51 System.out.println("MinHeapFreeRatio= " + minValue); 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(minValue - 1), 61 "-1024", "-1", "101", "1997" 62 }; 63 64 String goodValues[] = { 65 Integer.toString(minValue), 66 Integer.toString(minValue + 1), 67 Integer.toString((minValue + 100) / 2), 68 "99", "100" 69 }; 70 71 DynamicVMOption option = new DynamicVMOption("MaxHeapFreeRatio"); 72 73 assertTrue(option.isWriteable(), "Option " + option.name 74 + " is expected to be writable"); 75 76 for (String v : badValues) { 77 assertFalse(option.isValidValue(v), 78 "'" + v + "' is expected to be illegal for flag " + option.name); 79 } 80 for (String v : goodValues) { 81 option.setValue(v); 82 String newValue = option.getValue(); 83 assertEQ(v, newValue); 84 } 85 } 86 } 87