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test/hotspot/jtreg/gc/z/TestUncommit.java

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   8  *
   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 package gc.z;
  25 
  26 /*
  27  * @test TestUncommit
  28  * @requires vm.gc.Z
  29  * @summary Test ZGC uncommit unused memory
  30  * @run main/othervm -XX:+UnlockExperimentalVMOptions -XX:+UseZGC -Xms128M -Xmx512M -XX:ZUncommitDelay=10 gc.z.TestUncommit true 3
  31  * @run main/othervm -XX:+UnlockExperimentalVMOptions -XX:+UseZGC -Xms512M -Xmx512M -XX:ZUncommitDelay=10 gc.z.TestUncommit false 1
  32  * @run main/othervm -XX:+UnlockExperimentalVMOptions -XX:+UseZGC -Xms128M -Xmx512M -XX:ZUncommitDelay=10 -XX:-ZUncommit gc.z.TestUncommit false 1
  33  */
  34 
  35 import java.util.ArrayList;
  36 
  37 public class TestUncommit {
  38     private static final int delay = 10; // seconds
  39     private static final int allocSize = 200 * 1024 * 1024; // 200M
  40     private static final int smallObjectSize = 4 * 1024; // 4K
  41     private static final int mediumObjectSize = 2 * 1024 * 1024; // 2M
  42     private static final int largeObjectSize = allocSize;
  43 
  44     private static volatile ArrayList<byte[]> keepAlive;
  45 
  46     private static long capacity() {
  47         return Runtime.getRuntime().totalMemory();
  48     }




   8  *
   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 package gc.z;
  25 
  26 /*
  27  * @test TestUncommit
  28  * @requires vm.gc.Z & !vm.graal.enabled
  29  * @summary Test ZGC uncommit unused memory
  30  * @run main/othervm -XX:+UnlockExperimentalVMOptions -XX:+UseZGC -Xms128M -Xmx512M -XX:ZUncommitDelay=10 gc.z.TestUncommit true 3
  31  * @run main/othervm -XX:+UnlockExperimentalVMOptions -XX:+UseZGC -Xms512M -Xmx512M -XX:ZUncommitDelay=10 gc.z.TestUncommit false 1
  32  * @run main/othervm -XX:+UnlockExperimentalVMOptions -XX:+UseZGC -Xms128M -Xmx512M -XX:ZUncommitDelay=10 -XX:-ZUncommit gc.z.TestUncommit false 1
  33  */
  34 
  35 import java.util.ArrayList;
  36 
  37 public class TestUncommit {
  38     private static final int delay = 10; // seconds
  39     private static final int allocSize = 200 * 1024 * 1024; // 200M
  40     private static final int smallObjectSize = 4 * 1024; // 4K
  41     private static final int mediumObjectSize = 2 * 1024 * 1024; // 2M
  42     private static final int largeObjectSize = allocSize;
  43 
  44     private static volatile ArrayList<byte[]> keepAlive;
  45 
  46     private static long capacity() {
  47         return Runtime.getRuntime().totalMemory();
  48     }


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