test/loops/SubmissionPublisherLoops2.java

/*
 * Written by Doug Lea with assistance from members of JCP JSR-166
 * Expert Group and released to the public domain, as explained at
 * http://creativecommons.org/publicdomain/zero/1.0/
 */


import java.util.*;
import java.util.concurrent.*;

/**
 * One FJ publisher, many subscribers
 */
public class SubmissionPublisherLoops2 {
    static final int ITEMS = 1 << 20;
    static final int CONSUMERS  = 64;
    static final int CAP        = Flow.defaultBufferSize();
    static final int REPS = 9;

    static final Phaser phaser = new Phaser(CONSUMERS + 1);

    static class Sub implements Flow.Subscriber<Boolean> {
        Flow.Subscription sn;
        int count;
        public void onSubscribe(Flow.Subscription s) {
            (sn = s).request(CAP);
        }
        public void onNext(Boolean t) {
            if ((++count & (CAP - 1)) == (CAP >>> 1))
                sn.request(CAP);
        }
        public void onError(Throwable t) { t.printStackTrace(); }
        public void onComplete() {
            if (count != ITEMS)
                System.out.println("Error: remaining " + (ITEMS - count));
            phaser.arrive();
        }
    }

    static final class Pub extends RecursiveAction {
        final SubmissionPublisher<Boolean> pub =
            new SubmissionPublisher<Boolean>(ForkJoinPool.commonPool(), CAP);
        public void compute() {
            SubmissionPublisher<Boolean> p = pub;
            for (int i = 0; i < CONSUMERS; ++i)
                p.subscribe(new Sub());
            for (int i = 0; i < ITEMS; ++i)
                p.submit(Boolean.TRUE);
            p.close();
        }
    }

    static final long NPS = (1000L * 1000 * 1000);

    public static void main(String[] args) throws Exception {
        int reps = REPS;
        if (args.length > 0)
            reps = Integer.parseInt(args[0]);

        System.out.println("ITEMS: " + ITEMS +
                           " CONSUMERS: " + CONSUMERS +
                           " CAP: " + CAP);

        for (int rep = 0; rep < reps; ++rep) {
            long startTime = System.nanoTime();
            new Pub().fork();
            phaser.arriveAndAwaitAdvance();
            long elapsed = System.nanoTime() - startTime;
            double secs = ((double)elapsed) / NPS;
            System.out.printf("\tTime: %7.3f\n", secs);
        }
    }
}
Revision:	1.2
Committed:	Thu Jul 23 14:58:13 2015 UTC (8 years, 9 months ago) by jsr166
Branch:	MAIN
Changes since 1.1:	+9 -9 lines
Log Message:	whitespace
#	User	Rev	Content
1	dl	1.1	/*
2			* Written by Doug Lea with assistance from members of JCP JSR-166
3			* Expert Group and released to the public domain, as explained at
4			* http://creativecommons.org/publicdomain/zero/1.0/
5			*/
6
7
8			import java.util.*;
9			import java.util.concurrent.*;
10
11			/**
12			* One FJ publisher, many subscribers
13			*/
14			public class SubmissionPublisherLoops2 {
15			static final int ITEMS = 1 << 20;
16			static final int CONSUMERS = 64;
17			static final int CAP = Flow.defaultBufferSize();
18			static final int REPS = 9;
19
20			static final Phaser phaser = new Phaser(CONSUMERS + 1);
21
22			static class Sub implements Flow.Subscriber<Boolean> {
23			Flow.Subscription sn;
24			int count;
25	jsr166	1.2	public void onSubscribe(Flow.Subscription s) {
26			(sn = s).request(CAP);
27	dl	1.1	}
28	jsr166	1.2	public void onNext(Boolean t) {
29	dl	1.1	if ((++count & (CAP - 1)) == (CAP >>> 1))
30			sn.request(CAP);
31			}
32			public void onError(Throwable t) { t.printStackTrace(); }
33	jsr166	1.2	public void onComplete() {
34	dl	1.1	if (count != ITEMS)
35			System.out.println("Error: remaining " + (ITEMS - count));
36	jsr166	1.2	phaser.arrive();
37	dl	1.1	}
38			}
39
40			static final class Pub extends RecursiveAction {
41	jsr166	1.2	final SubmissionPublisher<Boolean> pub =
42	dl	1.1	new SubmissionPublisher<Boolean>(ForkJoinPool.commonPool(), CAP);
43			public void compute() {
44			SubmissionPublisher<Boolean> p = pub;
45			for (int i = 0; i < CONSUMERS; ++i)
46			p.subscribe(new Sub());
47	jsr166	1.2	for (int i = 0; i < ITEMS; ++i)
48	dl	1.1	p.submit(Boolean.TRUE);
49			p.close();
50			}
51			}
52
53			static final long NPS = (1000L * 1000 * 1000);
54
55			public static void main(String[] args) throws Exception {
56			int reps = REPS;
57			if (args.length > 0)
58			reps = Integer.parseInt(args[0]);
59	jsr166	1.2
60			System.out.println("ITEMS: " + ITEMS +
61	dl	1.1	" CONSUMERS: " + CONSUMERS +
62			" CAP: " + CAP);
63
64			for (int rep = 0; rep < reps; ++rep) {
65			long startTime = System.nanoTime();
66			new Pub().fork();
67			phaser.arriveAndAwaitAdvance();
68			long elapsed = System.nanoTime() - startTime;
69			double secs = ((double)elapsed) / NPS;
70			System.out.printf("\tTime: %7.3f\n", secs);
71			}
72			}
73			}