1 /*
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3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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5  * This code is free software; you can redistribute it and/or modify it
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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).
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15  * You should have received a copy of the GNU General Public License version
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17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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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
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22  */
23 
24 /*
25  * @test
26  * @key stress randomness
27  *
28  * @summary converted from VM Testbase gc/memory/UniThread/Linear3.
29  * VM Testbase keywords: [gc, stress, stressopt, nonconcurrent]
30  *
31  * @library /vmTestbase
32  *          /test/lib
33  * @run main/othervm gc.memory.UniThread.Linear3.Linear3 -iterations 5
34  */
35 
36 package gc.memory.UniThread.Linear3;
37 
38 import nsk.share.test.*;
39 import nsk.share.gc.*;
40 
41 /**
42  * Test GC collection of linked lists.
43  *
44  * This test simply creates a series of singly
45  * linked memory objects which should be able to be
46  * GC'd.
47  *
48  * In this test the size of one object is small, the number
49  * of objects in one list is medium and the number
50  * of lists is large. Also, the order in which references
51  * are cleared is randomized.
52  */
53 public class Linear3 extends GCTestBase {
54         private int arraySize;
55         private int objectSize;
56         private int circularitySize;
57         private MemoryObject memoryArray[];
58 
Linear3()59         public Linear3() {
60                 this(100, 5);
61         }
62 
Linear3(int objectSize, int circularitySize)63         public Linear3(int objectSize, int circularitySize) {
64                 this.objectSize = objectSize;
65                 this.circularitySize = circularitySize;
66         }
67 
run()68         public void run() {
69                 arraySize = Memory.getArrayLength(runParams.getTestMemory(), Memory.getListSize(circularitySize, objectSize));
70                 log.debug("Array size: " + arraySize);
71                 Stresser stresser = new Stresser(runParams.getStressOptions());
72                 memoryArray = new MemoryObject[arraySize];
73                 stresser.start(runParams.getIterations());
74                 try {
75                         while (stresser.iteration()) {
76                                 log.debug(Runtime.getRuntime().freeMemory());
77                                 for (int i = 0; i < arraySize && stresser.continueExecution(); i ++) {
78                                         int index = LocalRandom.nextInt(arraySize);
79                                         memoryArray[index] = Memory.makeCircularList(circularitySize, objectSize);
80                                 }
81                         }
82                 } finally {
83                         stresser.finish();
84                 }
85                 System.out.println("Test passed.");
86         }
87 
main(String args[])88         public static void main(String args[]) {
89                 GC.runTest(new Linear3(), args);
90         }
91 }
92