TestPromotionLABLargeSurvivorAlignment.java

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/**
 * @test
 * @bug 8060463
 * @summary Verify that objects promoted from eden space to survivor space
 *          with large values for SurvivorAlignmentInBytes succeed.
 * @requires vm.opt.ExplicitGCInvokesConcurrent != true
 * @run main/othervm -Xmx128m
 *                   -XX:+UnlockExperimentalVMOptions
 *                   -XX:SurvivorAlignmentInBytes=8 -XX:SurvivorRatio=1
 *                   -XX:-ExplicitGCInvokesConcurrent -XX:-ResizePLAB
 *                   TestPromotionLABLargeSurvivorAlignment
 * @run main/othervm -Xmx128m
 *                   -XX:+UnlockExperimentalVMOptions
 *                   -XX:SurvivorAlignmentInBytes=16 -XX:SurvivorRatio=1
 *                   -XX:-ExplicitGCInvokesConcurrent -XX:-ResizePLAB
 *                   TestPromotionLABLargeSurvivorAlignment
 * @run main/othervm -Xmx128m
 *                   -XX:+UnlockExperimentalVMOptions
 *                   -XX:SurvivorAlignmentInBytes=512 -XX:SurvivorRatio=1
 *                   -XX:-ExplicitGCInvokesConcurrent -XX:-ResizePLAB
 *                   TestPromotionLABLargeSurvivorAlignment
 * @run main/othervm -Xmx128m
 *                   -XX:+UnlockExperimentalVMOptions
 *                   -XX:SurvivorAlignmentInBytes=1k -XX:SurvivorRatio=1
 *                   -XX:-ExplicitGCInvokesConcurrent -XX:-ResizePLAB
 *                   TestPromotionLABLargeSurvivorAlignment
 * @run main/othervm -Xmx128m
 *                   -XX:+UnlockExperimentalVMOptions
 *                   -XX:SurvivorAlignmentInBytes=4k -XX:SurvivorRatio=1
 *                   -XX:-ExplicitGCInvokesConcurrent -XX:-ResizePLAB
 *                   TestPromotionLABLargeSurvivorAlignment
 * @run main/othervm -Xmx128m
 *                   -XX:+UnlockExperimentalVMOptions
 *                   -XX:SurvivorAlignmentInBytes=16k -XX:SurvivorRatio=1
 *                   -XX:-ExplicitGCInvokesConcurrent -XX:-ResizePLAB
 *                   TestPromotionLABLargeSurvivorAlignment
 */
public class TestPromotionLABLargeSurvivorAlignment {
    public static void main(String args[]) {
        Object garbage[] = new Object[1000000];
        for (int i = 0; i < garbage.length; i++) {
            garbage[i] = new byte[0];
        }
        for (int i = 0; i < 2; i++) {
            System.gc();
        }
    }
}