1 /*

     2  * Copyright (c) 2010, 2018, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     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 package vm.gc.containers;

    24 

    25 import nsk.share.gc.Memory;

    26 import nsk.share.gc.gp.GarbageProducer;

    27 import nsk.share.gc.gp.MemoryStrategy;

    28 import nsk.share.test.ExecutionController;

    29 

    30 public interface Container {

    31     public void setExecutionController(ExecutionController stresser);

    32     public void initialize();

    33     public void update();

    34 }

    35 

    36 abstract class TypicalContainer implements Container {

    37 

    38     protected ExecutionController stresser;

    39     protected long count;

    40     protected long size;

    41     protected GarbageProducer garbageProducer;

    42     protected Speed speed;

    43 

    44     public TypicalContainer(long maximumSize, GarbageProducer garbageProducer,

    45             MemoryStrategy memoryStrategy, Speed speed) {

    46         this.count = memoryStrategy.getCount(maximumSize);

    47         this.size = memoryStrategy.getSize(maximumSize);

    48         // typical container have at least reference to other element

    49         // and to data which is really size of "size" really for 100 bytes

    50         // overhead is about 50%

    51         final int structureOverHead = 6 * Memory.getReferenceSize();

    52         if (this.size < structureOverHead * 100) {

    53             this.count = this.count * (this.size - structureOverHead) / this.size;

    54         }

    55         this.garbageProducer = garbageProducer;

    56         this.speed = speed;

    57         System.err.format("Creating container: size = %s count = %s\n", size, count);

    58     }

    59 

    60     public void setExecutionController(ExecutionController stresser) {

    61         this.stresser = stresser;

    62     }

    63 

    64 

    65 }