1 /*
   2  * Copyright (c) 2016, 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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  23 
  24 /*
  25  * @test TestShrinkHeapInSteps
  26  * @key gc
  27  * @summary Verify that -XX:-ShrinkHeapInSteps works properly.
  28  * @library /test/lib
  29  * @modules java.base/jdk.internal.misc
  30  *          java.management
  31  * @run driver/timeout=240 TestShrinkHeapInSteps
  32  */
  33 
  34 import java.util.LinkedList;
  35 import java.util.Arrays;
  36 import java.util.Collections;
  37 import jdk.test.lib.Utils;
  38 
  39 public class TestShrinkHeapInSteps {
  40     public static void main(String args[]) throws Exception {
  41         LinkedList<String> options = new LinkedList<>(
  42                 Arrays.asList(Utils.getFilteredTestJavaOpts("-XX:[^ ]*HeapFreeRatio","-XX:\\+ExplicitGCInvokesConcurrent"))
  43         );
  44 
  45         // Leverage the existing TestMaxMinHeapFreeRatioFlags test, but pass
  46         // "false" for the shrinkHeapInSteps argument. This will cause it to
  47         // run with -XX:-ShrinkHeapInSteps, and only do 1 full GC instead of 10.
  48         TestMaxMinHeapFreeRatioFlags.positiveTest(10, false, 90, false, false, options);
  49         TestMaxMinHeapFreeRatioFlags.positiveTest(10, true, 80, false, false, options);
  50         TestMaxMinHeapFreeRatioFlags.positiveTest(20, false, 70, true, false, options);
  51         TestMaxMinHeapFreeRatioFlags.positiveTest(25, true, 65, true, false, options);
  52         TestMaxMinHeapFreeRatioFlags.positiveTest(40, false, 50, false, false, options);
  53     }
  54 }