test/hotspot/jtreg/vmTestbase/gc/memory/UniThread/Linear3/Linear3.java

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
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 */

/*
 * @test
 * @key stress gc
 *
 * @summary converted from VM Testbase gc/memory/UniThread/Linear3.
 * VM Testbase keywords: [gc, stress, stressopt, nonconcurrent]
 *
 * @library /vmTestbase
 *          /test/lib
 * @run driver jdk.test.lib.FileInstaller . .
 * @run main/othervm gc.memory.UniThread.Linear3.Linear3 -iterations 5
 */

package gc.memory.UniThread.Linear3;

import nsk.share.test.*;
import nsk.share.gc.*;

/**
 * Test GC collection of linked lists.
 *
 * This test simply creates a series of singly
 * linked memory objects which should be able to be
 * GC'd.
 *
 * In this test the size of one object is small, the number
 * of objects in one list is medium and the number
 * of lists is large. Also, the order in which references
 * are cleared is randomized.
 */
public class Linear3 extends GCTestBase {
        private int arraySize;
        private int objectSize;
        private int circularitySize;
        private MemoryObject memoryArray[];

        public Linear3() {
                this(100, 5);
        }

        public Linear3(int objectSize, int circularitySize) {
                this.objectSize = objectSize;
                this.circularitySize = circularitySize;
        }

        public void run() {
                arraySize = Memory.getArrayLength(runParams.getTestMemory(), Memory.getListSize(circularitySize, objectSize));
                log.debug("Array size: " + arraySize);
                Stresser stresser = new Stresser(runParams.getStressOptions());
                memoryArray = new MemoryObject[arraySize];
                stresser.start(runParams.getIterations());
                try {
                        while (stresser.iteration()) {
                                log.debug(Runtime.getRuntime().freeMemory());
                                for (int i = 0; i < arraySize && stresser.continueExecution(); i ++) {
                                        int index = LocalRandom.nextInt(arraySize);
                                        memoryArray[index] = Memory.makeCircularList(circularitySize, objectSize);
                                }
                        }
                } finally {
                        stresser.finish();
                }
                System.out.println("Test passed.");
        }

        public static void main(String args[]) {
                GC.runTest(new Linear3(), args);
        }
}