15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
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 /*
25 * @test TestDisableExplicitGC
26 * @requires vm.opt.DisableExplicitGC == null
27 * @summary Verify GC behavior with DisableExplicitGC flag.
28 * @library /testlibrary
29 * @run main/othervm -XX:+PrintGCDetails TestDisableExplicitGC
30 * @run main/othervm/fail -XX:+DisableExplicitGC -XX:+PrintGCDetails TestDisableExplicitGC
31 * @run main/othervm -XX:-DisableExplicitGC -XX:+PrintGCDetails TestDisableExplicitGC
32 */
33 import java.lang.management.GarbageCollectorMXBean;
34 import java.util.List;
35 import static com.oracle.java.testlibrary.Asserts.*;
36
37 public class TestDisableExplicitGC {
38
39 public static void main(String[] args) throws InterruptedException {
40 List<GarbageCollectorMXBean> list = java.lang.management.ManagementFactory.getGarbageCollectorMXBeans();
41 long collectionCountBefore = getCollectionCount(list);
42 System.gc();
43 long collectionCountAfter = getCollectionCount(list);
44 assertLT(collectionCountBefore, collectionCountAfter);
45 }
46
47 private static long getCollectionCount(List<GarbageCollectorMXBean> list) {
48 int collectionCount = 0;
49 for (GarbageCollectorMXBean gcMXBean : list) {
50 collectionCount += gcMXBean.getCollectionCount();
51 }
52 return collectionCount;
53 }
54 }
|
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
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 /*
25 * @test TestDisableExplicitGC
26 * @requires vm.opt.DisableExplicitGC == null
27 * @summary Verify GC behavior with DisableExplicitGC flag.
28 * @library /testlibrary
29 * @run main/othervm -XX:+PrintGCDetails TestDisableExplicitGC
30 * @run main/othervm/fail -XX:+DisableExplicitGC -XX:+PrintGCDetails TestDisableExplicitGC
31 * @run main/othervm -XX:-DisableExplicitGC -XX:+PrintGCDetails TestDisableExplicitGC
32 */
33 import java.lang.management.GarbageCollectorMXBean;
34 import java.util.List;
35 import static jdk.test.lib.Asserts.*;
36
37 public class TestDisableExplicitGC {
38
39 public static void main(String[] args) throws InterruptedException {
40 List<GarbageCollectorMXBean> list = java.lang.management.ManagementFactory.getGarbageCollectorMXBeans();
41 long collectionCountBefore = getCollectionCount(list);
42 System.gc();
43 long collectionCountAfter = getCollectionCount(list);
44 assertLT(collectionCountBefore, collectionCountAfter);
45 }
46
47 private static long getCollectionCount(List<GarbageCollectorMXBean> list) {
48 int collectionCount = 0;
49 for (GarbageCollectorMXBean gcMXBean : list) {
50 collectionCount += gcMXBean.getCollectionCount();
51 }
52 return collectionCount;
53 }
54 }
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