8037510: CMM Testing: Check Min/MaxHeapFreeRatio flags allows to shrink the heap when using ParallelGC
Summary: Added tests for Min/MaxHeapFreeRatio flags
Reviewed-by: jwilhelm, tschatzl
Contributed-by: andrey.x.zakharov@oracle.com
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/**
* @test TestDynMaxHeapFreeRatio
* @bug 8028391
* @summary Verify that MaxHeapFreeRatio flag is manageable
* @library /testlibrary
* @run main TestDynMaxHeapFreeRatio
* @run main/othervm -XX:MinHeapFreeRatio=0 -XX:MaxHeapFreeRatio=100 TestDynMaxHeapFreeRatio
* @run main/othervm -XX:MinHeapFreeRatio=10 -XX:MaxHeapFreeRatio=50 -XX:-UseAdaptiveSizePolicy TestDynMaxHeapFreeRatio
* @run main/othervm -XX:MinHeapFreeRatio=10 -XX:MaxHeapFreeRatio=50 TestDynMaxHeapFreeRatio
* @run main/othervm -XX:MinHeapFreeRatio=51 -XX:MaxHeapFreeRatio=52 TestDynMaxHeapFreeRatio
* @run main/othervm -XX:MinHeapFreeRatio=75 -XX:MaxHeapFreeRatio=100 TestDynMaxHeapFreeRatio
*/
import com.oracle.java.testlibrary.TestDynamicVMOption;
import com.oracle.java.testlibrary.DynamicVMOptionChecker;
public class TestDynMaxHeapFreeRatio extends TestDynamicVMOption {
public static final String MinFreeRatioFlagName = "MinHeapFreeRatio";
public static final String MaxFreeRatioFlagName = "MaxHeapFreeRatio";
public TestDynMaxHeapFreeRatio() {
super(MaxFreeRatioFlagName);
}
public void test() {
int minHeapFreeValue = DynamicVMOptionChecker.getIntValue(MinFreeRatioFlagName);
System.out.println(MinFreeRatioFlagName + " = " + minHeapFreeValue);
testPercentageValues();
checkInvalidValue(Integer.toString(minHeapFreeValue - 1));
checkValidValue(Integer.toString(minHeapFreeValue));
checkValidValue("100");
}
public static void main(String args[]) throws Exception {
new TestDynMaxHeapFreeRatio().test();
}
}