17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24 import jdk.internal.vm.annotation.Contended;
25
26 /*
27 * @test
28 * @summary Test that verifies that iteration over large, plain Java objects, that potentially cross region boundaries on G1, with references in them works.
29 * @requires vm.gc == "null"
30 * @bug 8151499 8153734
31 * @modules java.base/jdk.internal.vm.annotation
32 * @run main/othervm -XX:+EnableContended -XX:-RestrictContended -Xmx128m -XX:+UseParallelGC -XX:ContendedPaddingWidth=8192 TestHumongousReferenceObject
33 * @run main/othervm -XX:+EnableContended -XX:-RestrictContended -Xmx128m -XX:+UseG1GC -XX:G1HeapRegionSize=1M -XX:ContendedPaddingWidth=8192 TestHumongousReferenceObject
34 * @run main/othervm -XX:+EnableContended -XX:-RestrictContended -Xmx128m -XX:+UseG1GC -XX:G1HeapRegionSize=2M -XX:ContendedPaddingWidth=8192 TestHumongousReferenceObject
35 * @run main/othervm -XX:+EnableContended -XX:-RestrictContended -Xmx128m -XX:+UseG1GC -XX:G1HeapRegionSize=4M -XX:ContendedPaddingWidth=8192 TestHumongousReferenceObject
36 * @run main/othervm -XX:+EnableContended -XX:-RestrictContended -Xmx128m -XX:+UseG1GC -XX:G1HeapRegionSize=8M -XX:ContendedPaddingWidth=8192 TestHumongousReferenceObject
37 * @run main/othervm -XX:+EnableContended -XX:-RestrictContended -Xmx128m -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:ShenandoahHeapRegionSize=8M -XX:ContendedPaddingWidth=8192 TestHumongousReferenceObject
38 * @run main/othervm -XX:+EnableContended -XX:-RestrictContended -Xmx128m -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:ShenandoahHeapRegionSize=8M -XX:ContendedPaddingWidth=8192 -XX:+UnlockDiagnosticVMOptions -XX:+ShenandoahVerify TestHumongousReferenceObject
39 */
40 public class TestHumongousReferenceObject {
41
42 /*
43 Due to 300 fields with 8K @Contended padding around each field, it takes 2.4M bytes per instance.
44 With small G1 regions, it is bound to cross regions. G1 should properly (card) mark the object nevertheless.
45 With 128M heap, it is enough to allocate ~100 of these objects to provoke at least one GC.
46 */
47
48 static volatile Object instance;
49
50 public static void main(String[] args) {
51 for (int c = 0; c < 100; c++) {
52 instance = new TestHumongousReferenceObject();
53 }
54 }
55
56 @Contended Integer int_1 = new Integer(1);
|
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24 import jdk.internal.vm.annotation.Contended;
25
26 /*
27 * @test
28 * @summary Test that verifies that iteration over large, plain Java objects, that potentially cross region boundaries on G1, with references in them works.
29 * @requires vm.gc == "null"
30 * @bug 8151499 8153734
31 * @modules java.base/jdk.internal.vm.annotation
32 * @run main/othervm -XX:+EnableContended -XX:-RestrictContended -Xmx128m -XX:+UseParallelGC -XX:ContendedPaddingWidth=8192 TestHumongousReferenceObject
33 * @run main/othervm -XX:+EnableContended -XX:-RestrictContended -Xmx128m -XX:+UseG1GC -XX:G1HeapRegionSize=1M -XX:ContendedPaddingWidth=8192 TestHumongousReferenceObject
34 * @run main/othervm -XX:+EnableContended -XX:-RestrictContended -Xmx128m -XX:+UseG1GC -XX:G1HeapRegionSize=2M -XX:ContendedPaddingWidth=8192 TestHumongousReferenceObject
35 * @run main/othervm -XX:+EnableContended -XX:-RestrictContended -Xmx128m -XX:+UseG1GC -XX:G1HeapRegionSize=4M -XX:ContendedPaddingWidth=8192 TestHumongousReferenceObject
36 * @run main/othervm -XX:+EnableContended -XX:-RestrictContended -Xmx128m -XX:+UseG1GC -XX:G1HeapRegionSize=8M -XX:ContendedPaddingWidth=8192 TestHumongousReferenceObject
37 */
38
39 /*
40 * @test TestHumongousReferenceObjectShenandoah
41 * @summary Test that verifies that iteration over large, plain Java objects, that potentially cross region boundaries, with references in them works.
42 * @requires vm.gc.Shenandoah
43 * @bug 8151499 8153734
44 * @modules java.base/jdk.internal.vm.annotation
45 * @run main/othervm -XX:+EnableContended -XX:-RestrictContended -Xmx128m -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:ShenandoahHeapRegionSize=8M -XX:ContendedPaddingWidth=8192 TestHumongousReferenceObject
46 * @run main/othervm -XX:+EnableContended -XX:-RestrictContended -Xmx128m -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:ShenandoahHeapRegionSize=8M -XX:ContendedPaddingWidth=8192 -XX:+UnlockDiagnosticVMOptions -XX:+ShenandoahVerify TestHumongousReferenceObject
47 */
48 public class TestHumongousReferenceObject {
49
50 /*
51 Due to 300 fields with 8K @Contended padding around each field, it takes 2.4M bytes per instance.
52 With small G1 regions, it is bound to cross regions. G1 should properly (card) mark the object nevertheless.
53 With 128M heap, it is enough to allocate ~100 of these objects to provoke at least one GC.
54 */
55
56 static volatile Object instance;
57
58 public static void main(String[] args) {
59 for (int c = 0; c < 100; c++) {
60 instance = new TestHumongousReferenceObject();
61 }
62 }
63
64 @Contended Integer int_1 = new Integer(1);
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