test/gc/survivorAlignment/TestPromotionFromSurvivorToTenuredAfterFullGC.java

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/**
 * @test
 * @bug 8031323
 * @summary Verify that objects promoted from survivor space to tenured space
 *          during full GC are not aligned to SurvivorAlignmentInBytes value.
 * @library /testlibrary /testlibrary/whitebox
 * @build TestPromotionFromSurvivorToTenuredAfterFullGC
 *        SurvivorAlignmentTestMain AlignmentHelper
 * @run main ClassFileInstaller sun.hotspot.WhiteBox
 *                              sun.hotspot.WhiteBox$WhiteBoxPermission
 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
 *                   -XX:+WhiteBoxAPI -XX:NewSize=128m -XX:MaxNewSize=128m
 *                   -XX:OldSize=32m -XX:MaxHeapSize=160m
 *                   -XX:SurvivorRatio=1 -XX:-ExplicitGCInvokesConcurrent
 *                   -XX:+UnlockExperimentalVMOptions
 *                   -XX:SurvivorAlignmentInBytes=32
 *                   TestPromotionFromSurvivorToTenuredAfterFullGC 10m 9 TENURED
 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
 *                   -XX:+WhiteBoxAPI -XX:NewSize=128m -XX:MaxNewSize=128m
 *                   -XX:OldSize=32m -XX:MaxHeapSize=160m
 *                   -XX:SurvivorRatio=1 -XX:-ExplicitGCInvokesConcurrent
 *                   -XX:+UnlockExperimentalVMOptions
 *                   -XX:SurvivorAlignmentInBytes=32
 *                   TestPromotionFromSurvivorToTenuredAfterFullGC 20m 47
 *                   TENURED
 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
 *                   -XX:+WhiteBoxAPI -XX:NewSize=200m -XX:MaxNewSize=200m
 *                   -XX:OldSize=32m -XX:MaxHeapSize=232m
 *                   -XX:SurvivorRatio=1 -XX:-ExplicitGCInvokesConcurrent
 *                   -XX:+UnlockExperimentalVMOptions
 *                   -XX:SurvivorAlignmentInBytes=64
 *                   TestPromotionFromSurvivorToTenuredAfterFullGC 10m 9 TENURED
 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
 *                   -XX:+WhiteBoxAPI -XX:NewSize=128m -XX:MaxNewSize=128m
 *                   -XX:OldSize=32m -XX:MaxHeapSize=160m
 *                   -XX:SurvivorRatio=1 -XX:-ExplicitGCInvokesConcurrent
 *                   -XX:+UnlockExperimentalVMOptions
 *                   -XX:SurvivorAlignmentInBytes=64
 *                   TestPromotionFromSurvivorToTenuredAfterFullGC 20m 87
 *                   TENURED
 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
 *                   -XX:+WhiteBoxAPI -XX:NewSize=256m -XX:MaxNewSize=256m
 *                   -XX:OldSize=32M -XX:MaxHeapSize=288m
 *                   -XX:SurvivorRatio=1 -XX:-ExplicitGCInvokesConcurrent
 *                   -XX:+UnlockExperimentalVMOptions
 *                   -XX:SurvivorAlignmentInBytes=128
 *                    TestPromotionFromSurvivorToTenuredAfterFullGC 10m 9
 *                    TENURED
 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
 *                   -XX:+WhiteBoxAPI -XX:NewSize=128m -XX:MaxNewSize=128m
 *                   -XX:OldSize=32m -XX:MaxHeapSize=160m
 *                   -XX:SurvivorRatio=1 -XX:-ExplicitGCInvokesConcurrent
 *                   -XX:+UnlockExperimentalVMOptions
 *                   -XX:SurvivorAlignmentInBytes=128
 *                   TestPromotionFromSurvivorToTenuredAfterFullGC 20m 147
 *                   TENURED
 */
public class TestPromotionFromSurvivorToTenuredAfterFullGC {
    public static void main(String args[]) {
        SurvivorAlignmentTestMain test
                = SurvivorAlignmentTestMain.fromArgs(args);
        System.out.println(test);

        long expectedMemoryUsage = test.getExpectedMemoryUsage();
        test.baselineMemoryAllocation();
        System.gc();
        // increase expected usage by current old gen usage
        expectedMemoryUsage += SurvivorAlignmentTestMain.getAlignmentHelper(
                SurvivorAlignmentTestMain.HeapSpace.TENURED)
                .getActualMemoryUsage();

        test.allocate();
        SurvivorAlignmentTestMain.WHITE_BOX.youngGC();
        System.gc();

        test.verifyMemoryUsage(expectedMemoryUsage);
    }
}