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 /*
  26  * @test TestDynMaxHeapFreeRatio
  27  * @key gc
  28  * @bug JDK-8028391
  29  * @summary Verify that MaxHeapFreeRatio flag is managable
  30  * @library /testlibrary /testlibrary/gc
  31  * @build TestDynMaxHeapFreeRatio com.oracle.java.testlibrary.VMOptionValueChecker
  32  * @run main TestDynMaxHeapFreeRatio
  33  * @run main/othervm -XX:MinHeapFreeRatio=0  -XX:MaxHeapFreeRatio=100 TestDynMaxHeapFreeRatio
  34  * @run main/othervm -XX:MinHeapFreeRatio=10 -XX:MaxHeapFreeRatio=50 -XX:-UseAdaptiveSizePolicy TestDynMaxHeapFreeRatio
  35  * @run main/othervm -XX:MinHeapFreeRatio=10 -XX:MaxHeapFreeRatio=50 TestDynMaxHeapFreeRatio
  36  * @run main/othervm -XX:MinHeapFreeRatio=51 -XX:MaxHeapFreeRatio=52 TestDynMaxHeapFreeRatio
  37  * @run main/othervm -XX:MinHeapFreeRatio=75 -XX:MaxHeapFreeRatio=100 TestDynMaxHeapFreeRatio
  38  */
  39 import com.oracle.java.testlibrary.*;
  40 
  41 public class TestDynMaxHeapFreeRatio {
  42 
  43     public static final String MinFreeRatioFlagName = "MinHeapFreeRatio";
  44     public static final String MaxFreeRatioFlagName = "MaxHeapFreeRatio";
  45 
  46     public static void main(String args[]) throws Exception {
  47 
  48         int minHeapFreeValue = VMOptionValueChecker.getIntWritableValue(MinFreeRatioFlagName);
  49         int maxHeapFreeValue = VMOptionValueChecker.getIntWritableValue(MaxFreeRatioFlagName);
  50         System.out.println(MinFreeRatioFlagName + " = " + minHeapFreeValue);
  51         System.out.println(MaxFreeRatioFlagName + " = " + maxHeapFreeValue);
  52 
  53         VMOptionValueChecker.checkInvalidValue(MaxFreeRatioFlagName, Integer.toString(Integer.MIN_VALUE));
  54         VMOptionValueChecker.checkInvalidValue(MaxFreeRatioFlagName, Integer.toString(Integer.MAX_VALUE));
  55         VMOptionValueChecker.checkInvalidValue(MaxFreeRatioFlagName, "-10");
  56 
  57         VMOptionValueChecker.checkInvalidValue(MaxFreeRatioFlagName, Integer.toString(minHeapFreeValue - 1));
  58         VMOptionValueChecker.checkInvalidValue(MaxFreeRatioFlagName, "190");
  59 
  60         VMOptionValueChecker.checkValid(MaxFreeRatioFlagName, Integer.toString(minHeapFreeValue));
  61         VMOptionValueChecker.checkValid(MaxFreeRatioFlagName, "100");
  62     }
  63 
  64 }