jdk-24/test/hotspot/jtreg/gc/survivorAlignment/TestPromotionToSurvivor.java

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
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 * 2 along with this work; if not, write to the Free Software Foundation,
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/**
 * @test
 * @bug 8031323
 * @summary Verify that objects promoted from eden space to survivor space after
 *          minor GC are aligned to SurvivorAlignmentInBytes.
 * @requires vm.gc != "Z"
 * @library /test/lib
 * @modules java.base/jdk.internal.misc
 *          java.management
 * @build sun.hotspot.WhiteBox
 * @run driver ClassFileInstaller sun.hotspot.WhiteBox
 *                              sun.hotspot.WhiteBox$WhiteBoxPermission
 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
 *                   -XX:+WhiteBoxAPI -XX:NewSize=128m -XX:MaxNewSize=128m
 *                   -XX:SurvivorRatio=1 -XX:+UnlockExperimentalVMOptions
 *                   -XX:SurvivorAlignmentInBytes=32 -XX:OldSize=128m
 *                   -XX:MaxHeapSize=256m -XX:-ExplicitGCInvokesConcurrent -XX:-ResizePLAB
 *                   TestPromotionToSurvivor 10m 9 SURVIVOR
 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
 *                   -XX:+WhiteBoxAPI -XX:NewSize=128m -XX:MaxNewSize=128m
 *                   -XX:SurvivorRatio=1 -XX:+UnlockExperimentalVMOptions
 *                   -XX:SurvivorAlignmentInBytes=32 -XX:OldSize=128m
 *                   -XX:MaxHeapSize=256m -XX:-ExplicitGCInvokesConcurrent -XX:-ResizePLAB
 *                   TestPromotionToSurvivor 20m 47 SURVIVOR
 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
 *                   -XX:+WhiteBoxAPI -XX:NewSize=128m -XX:MaxNewSize=128m
 *                   -XX:SurvivorRatio=1 -XX:+UnlockExperimentalVMOptions
 *                   -XX:SurvivorAlignmentInBytes=64 -XX:OldSize=128m
 *                   -XX:MaxHeapSize=256m -XX:-ExplicitGCInvokesConcurrent -XX:-ResizePLAB
 *                   TestPromotionToSurvivor 8m 9 SURVIVOR
 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
 *                   -XX:+WhiteBoxAPI -XX:NewSize=128m -XX:MaxNewSize=128m
 *                   -XX:SurvivorRatio=1 -XX:+UnlockExperimentalVMOptions
 *                   -XX:SurvivorAlignmentInBytes=64 -XX:OldSize=128m
 *                   -XX:MaxHeapSize=256m -XX:-ExplicitGCInvokesConcurrent -XX:-ResizePLAB
 *                   TestPromotionToSurvivor 20m 87 SURVIVOR
 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
 *                   -XX:+WhiteBoxAPI -XX:NewSize=256m -XX:MaxNewSize=256m
 *                   -XX:SurvivorRatio=1 -XX:+UnlockExperimentalVMOptions
 *                   -XX:SurvivorAlignmentInBytes=128 -XX:OldSize=128m
 *                   -XX:MaxHeapSize=384m  -XX:-ExplicitGCInvokesConcurrent -XX:-ResizePLAB
 *                   TestPromotionToSurvivor 10m 9 SURVIVOR
 * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions
 *                   -XX:+WhiteBoxAPI -XX:NewSize=128m -XX:MaxNewSize=128m
 *                   -XX:SurvivorRatio=1 -XX:+UnlockExperimentalVMOptions
 *                   -XX:SurvivorAlignmentInBytes=128 -XX:OldSize=128m
 *                   -XX:MaxHeapSize=256m -XX:-ExplicitGCInvokesConcurrent -XX:-ResizePLAB
 *                   TestPromotionToSurvivor 20m 147 SURVIVOR
 */
public class TestPromotionToSurvivor {
    public static void main(String args[]) {
        SurvivorAlignmentTestMain test
                = SurvivorAlignmentTestMain.fromArgs(args);
        System.out.println(test);

        long expectedUsage = test.getExpectedMemoryUsage();
        test.baselineMemoryAllocation();
        SurvivorAlignmentTestMain.WHITE_BOX.fullGC();

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

        test.verifyMemoryUsage(expectedUsage);
    }
}