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
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  22  */
  23 
  24 /**
  25  * @test TestDynMinHeapFreeRatio
  26  * @bug 8028391
  27  * @summary Verify that MinHeapFreeRatio flag is manageable
  28  * @library /testlibrary
  29  * @run main TestDynMinHeapFreeRatio
  30  * @run main/othervm -XX:MinHeapFreeRatio=0 -XX:MaxHeapFreeRatio=100 TestDynMinHeapFreeRatio
  31  * @run main/othervm -XX:MinHeapFreeRatio=10 -XX:MaxHeapFreeRatio=50 -XX:-UseAdaptiveSizePolicy TestDynMinHeapFreeRatio
  32  * @run main/othervm -XX:MinHeapFreeRatio=10 -XX:MaxHeapFreeRatio=50 TestDynMinHeapFreeRatio
  33  * @run main/othervm -XX:MinHeapFreeRatio=51 -XX:MaxHeapFreeRatio=52 TestDynMinHeapFreeRatio
  34  * @run main/othervm -XX:MinHeapFreeRatio=75 -XX:MaxHeapFreeRatio=100 TestDynMinHeapFreeRatio
  35  */
  36 import com.oracle.java.testlibrary.TestDynamicVMOption;
  37 import com.oracle.java.testlibrary.DynamicVMOptionChecker;
  38 
  39 public class TestDynMinHeapFreeRatio extends TestDynamicVMOption {
  40 
  41     public static final String MinFreeRatioFlagName = "MinHeapFreeRatio";
  42     public static final String MaxFreeRatioFlagName = "MaxHeapFreeRatio";
  43 
  44     public TestDynMinHeapFreeRatio() {
  45         super(MinFreeRatioFlagName);
  46     }
  47 
  48     public void test() {
  49         int maxHeapFreeValue = DynamicVMOptionChecker.getIntValue(MaxFreeRatioFlagName);
  50         System.out.println(MaxFreeRatioFlagName + " = " + maxHeapFreeValue);
  51 
  52         testPercentageValues();
  53 
  54         checkInvalidValue(Integer.toString(maxHeapFreeValue + 1));
  55         checkValidValue(Integer.toString(maxHeapFreeValue));
  56         checkValidValue("0");
  57     }
  58 
  59     public static void main(String args[]) throws Exception {
  60         new TestDynMinHeapFreeRatio().test();
  61     }
  62 }