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23 
24 package gc.arguments;
25 
26 /*
27  * @test TestShrinkHeapInSteps
28  * @key gc
29  * @summary Verify that -XX:-ShrinkHeapInSteps works properly.
30  * @requires vm.gc != "Z" & vm.gc != "Shenandoah"
31  * @library /test/lib
32  * @library /
33  * @modules java.base/jdk.internal.misc
34  *          java.management
35  * @run driver/timeout=240 gc.arguments.TestShrinkHeapInSteps
36  */
37 
38 import java.util.LinkedList;
39 import java.util.Arrays;
40 import jdk.test.lib.Utils;
41 
42 public class TestShrinkHeapInSteps {
main(String args[])43     public static void main(String args[]) throws Exception {
44         LinkedList<String> options = new LinkedList<>(
45                 Arrays.asList(Utils.getFilteredTestJavaOpts("-XX:[^ ]*HeapFreeRatio","-XX:\\+ExplicitGCInvokesConcurrent"))
46         );
47 
48         // Leverage the existing TestMaxMinHeapFreeRatioFlags test, but pass
49         // "false" for the shrinkHeapInSteps argument. This will cause it to
50         // run with -XX:-ShrinkHeapInSteps, and only do 1 full GC instead of 10.
51         TestMaxMinHeapFreeRatioFlags.positiveTest(10, false, 90, false, false, options);
52         TestMaxMinHeapFreeRatioFlags.positiveTest(10, true, 80, false, false, options);
53         TestMaxMinHeapFreeRatioFlags.positiveTest(20, false, 70, true, false, options);
54         TestMaxMinHeapFreeRatioFlags.positiveTest(25, true, 65, true, false, options);
55         TestMaxMinHeapFreeRatioFlags.positiveTest(40, false, 50, false, false, options);
56     }
57 }
58