18 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
19 * or visit www.oracle.com if you need additional information or have any
20 * questions.
21 */
22
23 /*
24 * This file is available under and governed by the GNU General Public
25 * License version 2 only, as published by the Free Software Foundation.
26 * However, the following notice accompanied the original version of this
27 * file:
28 *
29 * Written by Doug Lea with assistance from members of JCP JSR-166
30 * Expert Group and released to the public domain, as explained at
31 * http://creativecommons.org/publicdomain/zero/1.0/
32 */
33
34 /*
35 * @test
36 * @bug 4486658
37 * @summary multiple threads using a single lock
38 * @library /lib/testlibrary/
39 */
40
41 import static java.util.concurrent.TimeUnit.MILLISECONDS;
42
43 import java.util.concurrent.CyclicBarrier;
44 import java.util.concurrent.ExecutorService;
45 import java.util.concurrent.Executors;
46 import java.util.concurrent.locks.ReentrantLock;
47 import java.util.concurrent.ThreadLocalRandom;
48 import jdk.testlibrary.Utils;
49
50 public final class SimpleReentrantLockLoops {
51 static final long LONG_DELAY_MS = Utils.adjustTimeout(10_000);
52 static final ExecutorService pool = Executors.newCachedThreadPool();
53 static boolean print = false;
54 static int iters = 100_000;
55
56 public static void main(String[] args) throws Exception {
57 int maxThreads = 5;
58 if (args.length > 0)
59 maxThreads = Integer.parseInt(args[0]);
60
61 print = true;
62
63 int reps = 2;
64 for (int i = 1; i <= maxThreads; i += (i+1) >>> 1) {
65 int n = reps;
66 if (reps > 1) --reps;
67 while (n-- > 0) {
68 System.out.print("Threads: " + i);
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18 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
19 * or visit www.oracle.com if you need additional information or have any
20 * questions.
21 */
22
23 /*
24 * This file is available under and governed by the GNU General Public
25 * License version 2 only, as published by the Free Software Foundation.
26 * However, the following notice accompanied the original version of this
27 * file:
28 *
29 * Written by Doug Lea with assistance from members of JCP JSR-166
30 * Expert Group and released to the public domain, as explained at
31 * http://creativecommons.org/publicdomain/zero/1.0/
32 */
33
34 /*
35 * @test
36 * @bug 4486658
37 * @summary multiple threads using a single lock
38 * @library /test/lib
39 */
40
41 import static java.util.concurrent.TimeUnit.MILLISECONDS;
42
43 import java.util.concurrent.CyclicBarrier;
44 import java.util.concurrent.ExecutorService;
45 import java.util.concurrent.Executors;
46 import java.util.concurrent.locks.ReentrantLock;
47 import java.util.concurrent.ThreadLocalRandom;
48 import jdk.test.lib.Utils;
49
50 public final class SimpleReentrantLockLoops {
51 static final long LONG_DELAY_MS = Utils.adjustTimeout(10_000);
52 static final ExecutorService pool = Executors.newCachedThreadPool();
53 static boolean print = false;
54 static int iters = 100_000;
55
56 public static void main(String[] args) throws Exception {
57 int maxThreads = 5;
58 if (args.length > 0)
59 maxThreads = Integer.parseInt(args[0]);
60
61 print = true;
62
63 int reps = 2;
64 for (int i = 1; i <= maxThreads; i += (i+1) >>> 1) {
65 int n = reps;
66 if (reps > 1) --reps;
67 while (n-- > 0) {
68 System.out.print("Threads: " + i);
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