test/gc/arguments/TestG1HeapRegionSize.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 /*
  25  * @test TestG1HeapRegionSize
  26  * @key gc
  27  * @bug 8021879

  28  * @summary Verify that the flag G1HeapRegionSize is updated properly
  29  * @run main/othervm -Xmx64m TestG1HeapRegionSize 1048576
  30  * @run main/othervm -XX:G1HeapRegionSize=2m -Xmx64m TestG1HeapRegionSize 2097152
  31  * @run main/othervm -XX:G1HeapRegionSize=3m -Xmx64m TestG1HeapRegionSize 2097152
  32  * @run main/othervm -XX:G1HeapRegionSize=64m -Xmx256m TestG1HeapRegionSize 33554432
  33  */
  34 
  35 import sun.management.ManagementFactoryHelper;
  36 import com.sun.management.HotSpotDiagnosticMXBean;
  37 import com.sun.management.VMOption;
  38 
  39 public class TestG1HeapRegionSize {
  40 
  41   public static void main(String[] args) {
  42     HotSpotDiagnosticMXBean diagnostic = ManagementFactoryHelper.getDiagnosticMXBean();
  43 
  44     VMOption option = diagnostic.getVMOption("UseG1GC");
  45     if (option.getValue().equals("false")) {
  46       System.out.println("Skipping this test. It is only a G1 test.");
  47       return;
  48     }
  49 
  50     String expectedValue = getExpectedValue(args);
  51     option = diagnostic.getVMOption("G1HeapRegionSize");
  52     if (!expectedValue.equals(option.getValue())) {
  53       throw new RuntimeException("Wrong value for G1HeapRegionSize. Expected " + expectedValue + " but got " + option.getValue());
  54     }
  55   }
  56 
  57   private static String getExpectedValue(String[] args) {
  58     if (args.length != 1) {
  59       throw new RuntimeException("Wrong number of arguments. Expected 1 but got " + args.length);
  60     }
  61     return args[0];
  62   }
  63 
  64 }


   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 /*
  25  * @test TestG1HeapRegionSize
  26  * @key gc
  27  * @bug 8021879
  28  * @requires vm.gc=="G1"
  29  * @summary Verify that the flag G1HeapRegionSize is updated properly
  30  * @run main/othervm -Xmx64m TestG1HeapRegionSize 1048576
  31  * @run main/othervm -XX:G1HeapRegionSize=2m -Xmx64m TestG1HeapRegionSize 2097152
  32  * @run main/othervm -XX:G1HeapRegionSize=3m -Xmx64m TestG1HeapRegionSize 2097152
  33  * @run main/othervm -XX:G1HeapRegionSize=64m -Xmx256m TestG1HeapRegionSize 33554432
  34  */
  35 
  36 import sun.management.ManagementFactoryHelper;
  37 import com.sun.management.HotSpotDiagnosticMXBean;
  38 import com.sun.management.VMOption;
  39 
  40 public class TestG1HeapRegionSize {
  41 
  42   public static void main(String[] args) {
  43     HotSpotDiagnosticMXBean diagnostic = ManagementFactoryHelper.getDiagnosticMXBean();
  44 






  45     String expectedValue = getExpectedValue(args);
  46     VMOption option = diagnostic.getVMOption("G1HeapRegionSize");
  47     if (!expectedValue.equals(option.getValue())) {
  48       throw new RuntimeException("Wrong value for G1HeapRegionSize. Expected " + expectedValue + " but got " + option.getValue());
  49     }
  50   }
  51 
  52   private static String getExpectedValue(String[] args) {
  53     if (args.length != 1) {
  54       throw new RuntimeException("Wrong number of arguments. Expected 1 but got " + args.length);
  55     }
  56     return args[0];
  57   }
  58 
  59 }