test/gc/parallelScavenge/TestDynShrinkHeap.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  * @ignore 8019361
  26  * @test TestDynShrinkHeap
  27  * @bug 8016479

  28  * @summary Verify that the heap shrinks after full GC according to the current values of the Min/MaxHeapFreeRatio flags
  29  * @library /testlibrary
  30  * @run main/othervm -XX:+UseAdaptiveSizePolicyWithSystemGC -XX:+UseParallelGC -XX:MinHeapFreeRatio=0 -XX:MaxHeapFreeRatio=100 -Xmx1g -verbose:gc TestDynShrinkHeap
  31  */
  32 import com.oracle.java.testlibrary.DynamicVMOption;
  33 import java.lang.management.ManagementFactory;
  34 import java.lang.management.MemoryUsage;
  35 import java.util.ArrayList;
  36 import sun.management.ManagementFactoryHelper;
  37 import static com.oracle.java.testlibrary.Asserts.*;
  38 
  39 public class TestDynShrinkHeap {
  40 
  41     public static final String MIN_FREE_RATIO_FLAG_NAME = "MinHeapFreeRatio";
  42     public static final String MAX_FREE_RATIO_FLAG_NAME = "MaxHeapFreeRatio";
  43 
  44     private static ArrayList<byte[]> list = new ArrayList<>(0);
  45     private static final int LEN = 512 * 1024 + 1;
  46 
  47     public TestDynShrinkHeap() {




   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  * @ignore 8019361
  26  * @test TestDynShrinkHeap
  27  * @bug 8016479
  28  * @requires vm.gc=="Parallel" | vm.gc=="null"
  29  * @summary Verify that the heap shrinks after full GC according to the current values of the Min/MaxHeapFreeRatio flags
  30  * @library /testlibrary
  31  * @run main/othervm -XX:+UseAdaptiveSizePolicyWithSystemGC -XX:+UseParallelGC -XX:MinHeapFreeRatio=0 -XX:MaxHeapFreeRatio=100 -Xmx1g -verbose:gc TestDynShrinkHeap
  32  */
  33 import com.oracle.java.testlibrary.DynamicVMOption;
  34 import java.lang.management.ManagementFactory;
  35 import java.lang.management.MemoryUsage;
  36 import java.util.ArrayList;
  37 import sun.management.ManagementFactoryHelper;
  38 import static com.oracle.java.testlibrary.Asserts.*;
  39 
  40 public class TestDynShrinkHeap {
  41 
  42     public static final String MIN_FREE_RATIO_FLAG_NAME = "MinHeapFreeRatio";
  43     public static final String MAX_FREE_RATIO_FLAG_NAME = "MaxHeapFreeRatio";
  44 
  45     private static ArrayList<byte[]> list = new ArrayList<>(0);
  46     private static final int LEN = 512 * 1024 + 1;
  47 
  48     public TestDynShrinkHeap() {