test/gc/concurrentMarkSweep/DisableResizePLAB.java

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   9 * This code is distributed in the hope that it will be useful, but WITHOUT
  10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12 * version 2 for more details (a copy is included in the LICENSE file that
  13 * accompanied this code).
  14 *
  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 DisableResizePLAB
  26  * @key gc
  27  * @bug 8060467
  28  * @author filipp.zhinkin@oracle.com, john.coomes@oracle.com

  29  * @summary Run CMS with PLAB resizing disabled and a small OldPLABSize
  30  * @run main/othervm -XX:+UseConcMarkSweepGC -XX:-ResizePLAB -XX:OldPLABSize=1k -Xmx256m -XX:+PrintGCDetails DisableResizePLAB
  31  */
  32 
  33 public class DisableResizePLAB {
  34     public static void main(String args[]) throws Exception {
  35         Object garbage[] = new Object[1_000];
  36         for (int i = 0; i < garbage.length; i++) {
  37             garbage[i] = new byte[0];
  38         }
  39         long startTime = System.currentTimeMillis();
  40         while (System.currentTimeMillis() - startTime < 10_000) {
  41             Object o = new byte[1024];
  42         }
  43     }
  44 }


   9 * This code is distributed in the hope that it will be useful, but WITHOUT
  10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12 * version 2 for more details (a copy is included in the LICENSE file that
  13 * accompanied this code).
  14 *
  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 DisableResizePLAB
  26  * @key gc
  27  * @bug 8060467
  28  * @author filipp.zhinkin@oracle.com, john.coomes@oracle.com
  29  * @requires vm.gc=="ConcMarkSweep" | vm.gc=="null"
  30  * @summary Run CMS with PLAB resizing disabled and a small OldPLABSize
  31  * @run main/othervm -XX:+UseConcMarkSweepGC -XX:-ResizePLAB -XX:OldPLABSize=1k -Xmx256m -XX:+PrintGCDetails DisableResizePLAB
  32  */
  33 
  34 public class DisableResizePLAB {
  35     public static void main(String args[]) throws Exception {
  36         Object garbage[] = new Object[1_000];
  37         for (int i = 0; i < garbage.length; i++) {
  38             garbage[i] = new byte[0];
  39         }
  40         long startTime = System.currentTimeMillis();
  41         while (System.currentTimeMillis() - startTime < 10_000) {
  42             Object o = new byte[1024];
  43         }
  44     }
  45 }