32 * @bug 8151499 8153734
33 * @modules java.base/jdk.internal.vm.annotation
34 * @run main/othervm -XX:+EnableContended -XX:-RestrictContended -Xmx128m -XX:+UseParallelGC -XX:ContendedPaddingWidth=8192 gc.TestHumongousReferenceObject
35 */
36
37 /*
38 * @test TestHumongousReferenceObjectG1
39 * @summary Test that verifies that iteration over large, plain Java objects, that potentially cross region boundaries on G1, with references in them works.
40 * @requires vm.gc.G1
41 * @bug 8151499 8153734
42 * @modules java.base/jdk.internal.vm.annotation
43 * @run main/othervm -XX:+EnableContended -XX:-RestrictContended -Xmx128m -XX:+UseG1GC -XX:G1HeapRegionSize=1M -XX:ContendedPaddingWidth=8192 gc.TestHumongousReferenceObject
44 * @run main/othervm -XX:+EnableContended -XX:-RestrictContended -Xmx128m -XX:+UseG1GC -XX:G1HeapRegionSize=2M -XX:ContendedPaddingWidth=8192 gc.TestHumongousReferenceObject
45 * @run main/othervm -XX:+EnableContended -XX:-RestrictContended -Xmx128m -XX:+UseG1GC -XX:G1HeapRegionSize=4M -XX:ContendedPaddingWidth=8192 gc.TestHumongousReferenceObject
46 * @run main/othervm -XX:+EnableContended -XX:-RestrictContended -Xmx128m -XX:+UseG1GC -XX:G1HeapRegionSize=8M -XX:ContendedPaddingWidth=8192 gc.TestHumongousReferenceObject
47 */
48
49 /*
50 * @test TestHumongousReferenceObjectShenandoah
51 * @summary Test that verifies that iteration over large, plain Java objects, that potentially cross region boundaries, with references in them works.
52 * @requires vm.gc.Shenandoah
53 * @bug 8151499 8153734
54 * @modules java.base/jdk.internal.vm.annotation
55 * @run main/othervm -XX:+EnableContended -XX:-RestrictContended -Xmx128m -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:ShenandoahHeapRegionSize=8M -XX:ContendedPaddingWidth=8192 gc.TestHumongousReferenceObject
56 * @run main/othervm -XX:+EnableContended -XX:-RestrictContended -Xmx128m -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:ShenandoahHeapRegionSize=8M -XX:ContendedPaddingWidth=8192 -XX:+UnlockDiagnosticVMOptions -XX:+ShenandoahVerify gc.TestHumongousReferenceObject
57 */
58 public class TestHumongousReferenceObject {
59
60 /*
61 Due to 300 fields with 8K @Contended padding around each field, it takes 2.4M bytes per instance.
62 With small G1 regions, it is bound to cross regions. G1 should properly (card) mark the object nevertheless.
63 With 128M heap, it is enough to allocate ~100 of these objects to provoke at least one GC.
64 */
65
66 static volatile Object instance;
67
68 public static void main(String[] args) {
69 for (int c = 0; c < 100; c++) {
70 instance = new TestHumongousReferenceObject();
71 }
72 }
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32 * @bug 8151499 8153734
33 * @modules java.base/jdk.internal.vm.annotation
34 * @run main/othervm -XX:+EnableContended -XX:-RestrictContended -Xmx128m -XX:+UseParallelGC -XX:ContendedPaddingWidth=8192 gc.TestHumongousReferenceObject
35 */
36
37 /*
38 * @test TestHumongousReferenceObjectG1
39 * @summary Test that verifies that iteration over large, plain Java objects, that potentially cross region boundaries on G1, with references in them works.
40 * @requires vm.gc.G1
41 * @bug 8151499 8153734
42 * @modules java.base/jdk.internal.vm.annotation
43 * @run main/othervm -XX:+EnableContended -XX:-RestrictContended -Xmx128m -XX:+UseG1GC -XX:G1HeapRegionSize=1M -XX:ContendedPaddingWidth=8192 gc.TestHumongousReferenceObject
44 * @run main/othervm -XX:+EnableContended -XX:-RestrictContended -Xmx128m -XX:+UseG1GC -XX:G1HeapRegionSize=2M -XX:ContendedPaddingWidth=8192 gc.TestHumongousReferenceObject
45 * @run main/othervm -XX:+EnableContended -XX:-RestrictContended -Xmx128m -XX:+UseG1GC -XX:G1HeapRegionSize=4M -XX:ContendedPaddingWidth=8192 gc.TestHumongousReferenceObject
46 * @run main/othervm -XX:+EnableContended -XX:-RestrictContended -Xmx128m -XX:+UseG1GC -XX:G1HeapRegionSize=8M -XX:ContendedPaddingWidth=8192 gc.TestHumongousReferenceObject
47 */
48
49 /*
50 * @test TestHumongousReferenceObjectShenandoah
51 * @summary Test that verifies that iteration over large, plain Java objects, that potentially cross region boundaries, with references in them works.
52 * @requires vm.gc.Shenandoah & !vm.graal.enabled
53 * @bug 8151499 8153734
54 * @modules java.base/jdk.internal.vm.annotation
55 * @run main/othervm -XX:+EnableContended -XX:-RestrictContended -Xmx128m -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:ShenandoahHeapRegionSize=8M -XX:ContendedPaddingWidth=8192 gc.TestHumongousReferenceObject
56 * @run main/othervm -XX:+EnableContended -XX:-RestrictContended -Xmx128m -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:ShenandoahHeapRegionSize=8M -XX:ContendedPaddingWidth=8192 -XX:+UnlockDiagnosticVMOptions -XX:+ShenandoahVerify gc.TestHumongousReferenceObject
57 */
58 public class TestHumongousReferenceObject {
59
60 /*
61 Due to 300 fields with 8K @Contended padding around each field, it takes 2.4M bytes per instance.
62 With small G1 regions, it is bound to cross regions. G1 should properly (card) mark the object nevertheless.
63 With 128M heap, it is enough to allocate ~100 of these objects to provoke at least one GC.
64 */
65
66 static volatile Object instance;
67
68 public static void main(String[] args) {
69 for (int c = 0; c < 100; c++) {
70 instance = new TestHumongousReferenceObject();
71 }
72 }
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