test/loops/TimeoutProducerConsumerLoops.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.concurrent.*;

public class TimeoutProducerConsumerLoops {
    static final int NCPUS = Runtime.getRuntime().availableProcessors();
    static final ExecutorService pool = Executors.newCachedThreadPool();

    // Number of elements passed around -- must be power of two
    // Elements are reused from pool to minimize alloc impact
    static final int POOL_SIZE = 1 << 8;
    static final int POOL_MASK = POOL_SIZE-1;
    static final Integer[] intPool = new Integer[POOL_SIZE];
    static {
        for (int i = 0; i < POOL_SIZE; ++i)
            intPool[i] = Integer.valueOf(i);
    }

    // max lag between a producer and consumer to avoid
    // this becoming a GC test rather than queue test.
    // Used only per-pair to lessen impact on queue sync
    static final int LAG_MASK = (1 << 12) - 1;

    static boolean print = false;
    static int producerSum;
    static int consumerSum;
    static synchronized void addProducerSum(int x) {
        producerSum += x;
    }

    static synchronized void addConsumerSum(int x) {
        consumerSum += x;
    }

    static synchronized void checkSum() {
        if (producerSum != consumerSum) {
            throw new Error("CheckSum mismatch");
        }
    }

    public static void main(String[] args) throws Exception {
        int maxPairs = NCPUS * 3 / 2;
        int iters = 1000000;

        if (args.length > 0)
            maxPairs = Integer.parseInt(args[0]);

        print = true;
        for (int k = 1, i = 1; i <= maxPairs;) {
            System.out.println("Pairs:" + i);
            oneTest(i, iters);
            Thread.sleep(100);
            if (i == k) {
                k = i << 1;
                i = i + (i >>> 1);
            }
            else
                i = k;
        }
        pool.shutdown();
    }

    static void oneTest(int n, int iters) throws Exception {
        if (print)
            System.out.print("LinkedTransferQueue      ");
        oneRun(new LinkedTransferQueue<Integer>(), n, iters);

        if (print)
            System.out.print("LinkedTransferQueue(xfer)");
        oneRun(new LTQasSQ<Integer>(), n, iters);

        if (print)
            System.out.print("LinkedBlockingQueue      ");
        oneRun(new LinkedBlockingQueue<Integer>(), n, iters);

        if (print)
            System.out.print("LinkedBlockingQueue(cap) ");
        oneRun(new LinkedBlockingQueue<Integer>(POOL_SIZE), n, iters);

        if (print)
            System.out.print("ArrayBlockingQueue(cap)  ");
        oneRun(new ArrayBlockingQueue<Integer>(POOL_SIZE), n, iters);

        if (print)
            System.out.print("LinkedBlockingDeque      ");
        oneRun(new LinkedBlockingDeque<Integer>(), n, iters);

        if (print)
            System.out.print("SynchronousQueue         ");
        oneRun(new SynchronousQueue<Integer>(), n, iters);

        if (print)
            System.out.print("SynchronousQueue(fair)   ");
        oneRun(new SynchronousQueue<Integer>(true), n, iters);

        if (print)
            System.out.print("PriorityBlockingQueue    ");
        oneRun(new PriorityBlockingQueue<Integer>(), n, iters / 16);

        if (print)
            System.out.print("ArrayBlockingQueue(fair) ");
        oneRun(new ArrayBlockingQueue<Integer>(POOL_SIZE, true), n, iters/16);

    }

    abstract static class Stage implements Runnable {
        final int iters;
        final BlockingQueue<Integer> queue;
        final CyclicBarrier barrier;
        final Phaser lagPhaser;
        Stage(BlockingQueue<Integer> q, CyclicBarrier b, Phaser s, int iters) {
            queue = q;
            barrier = b;
            lagPhaser = s;
            this.iters = iters;
        }
    }

    static class Producer extends Stage {
        Producer(BlockingQueue<Integer> q, CyclicBarrier b, Phaser s, int iters) {
            super(q, b, s, iters);
        }

        public void run() {
            try {
                barrier.await();
                int s = 0;
                int l = hashCode();
                int i = 0;
                long timeout = 1000;
                while (i < iters) {
                    l = LoopHelpers.compute4(l);
                    Integer v = intPool[l & POOL_MASK];
                    if (queue.offer(v, timeout, TimeUnit.NANOSECONDS)) {
                        s += LoopHelpers.compute4(v.intValue());
                        ++i;
                        if (timeout > 1)
                            timeout--;
                        if ((i & LAG_MASK) == LAG_MASK)
                            lagPhaser.arriveAndAwaitAdvance();
                    }
                    else
                        timeout++;
                }
                addProducerSum(s);
                barrier.await();
            }
            catch (Exception ie) {
                ie.printStackTrace();
                return;
            }
        }
    }

    static class Consumer extends Stage {
        Consumer(BlockingQueue<Integer> q, CyclicBarrier b, Phaser s, int iters) {
            super(q, b, s, iters);
        }

        public void run() {
            try {
                barrier.await();
                int l = 0;
                int s = 0;
                int i = 0;
                long timeout = 1000;
                while (i < iters) {
                    Integer e = queue.poll(timeout,
                                           TimeUnit.NANOSECONDS);
                    if (e != null) {
                        l = LoopHelpers.compute4(e.intValue());
                        s += l;
                        ++i;
                        if (timeout > 1)
                            --timeout;
                        if ((i & LAG_MASK) == LAG_MASK)
                            lagPhaser.arriveAndAwaitAdvance();
                    }
                    else
                        ++timeout;
                }
                addConsumerSum(s);
                barrier.await();
            }
            catch (Exception ie) {
                ie.printStackTrace();
                return;
            }
        }

    }

    static void oneRun(BlockingQueue<Integer> q, int npairs, int iters) throws Exception {
        LoopHelpers.BarrierTimer timer = new LoopHelpers.BarrierTimer();
        CyclicBarrier barrier = new CyclicBarrier(npairs * 2 + 1, timer);
        for (int i = 0; i < npairs; ++i) {
            Phaser s = new Phaser(2);
            pool.execute(new Producer(q, barrier, s, iters));
            pool.execute(new Consumer(q, barrier, s, iters));
        }
        barrier.await();
        barrier.await();
        long time = timer.getTime();
        checkSum();
        q.clear();
        if (print)
            System.out.println("\t: " + LoopHelpers.rightJustify(time / (iters * npairs)) + " ns per transfer");
    }

    static final class LTQasSQ<T> extends LinkedTransferQueue<T> {
        LTQasSQ() { super(); }
        public void put(T x) {
            try { super.transfer(x);
            } catch (InterruptedException ex) { throw new Error(); }
        }

        public boolean offer(T x, long timeout, TimeUnit unit) {
            return super.offer(x, timeout, unit);
        }

    }

}
Revision:	1.12
Committed:	Thu Jan 15 18:34:19 2015 UTC (9 years, 3 months ago) by jsr166
Branch:	MAIN
Changes since 1.11:	+0 -1 lines
Log Message:	delete extraneous blank lines
#	User	Rev	Content
1	dl	1.1	/*
2			* Written by Doug Lea with assistance from members of JCP JSR-166
3	dl	1.2	* Expert Group and released to the public domain, as explained at
4	jsr166	1.9	* http://creativecommons.org/publicdomain/zero/1.0/
5	dl	1.1	*/
6
7			import java.util.concurrent.*;
8	dl	1.5
9	dl	1.1	public class TimeoutProducerConsumerLoops {
10	dl	1.3	static final int NCPUS = Runtime.getRuntime().availableProcessors();
11	dl	1.1	static final ExecutorService pool = Executors.newCachedThreadPool();
12	dl	1.3
13			// Number of elements passed around -- must be power of two
14			// Elements are reused from pool to minimize alloc impact
15			static final int POOL_SIZE = 1 << 8;
16			static final int POOL_MASK = POOL_SIZE-1;
17			static final Integer[] intPool = new Integer[POOL_SIZE];
18			static {
19	jsr166	1.6	for (int i = 0; i < POOL_SIZE; ++i)
20	dl	1.3	intPool[i] = Integer.valueOf(i);
21			}
22
23	jsr166	1.6	// max lag between a producer and consumer to avoid
24	dl	1.5	// this becoming a GC test rather than queue test.
25			// Used only per-pair to lessen impact on queue sync
26			static final int LAG_MASK = (1 << 12) - 1;
27	dl	1.3
28	dl	1.1	static boolean print = false;
29			static int producerSum;
30			static int consumerSum;
31			static synchronized void addProducerSum(int x) {
32			producerSum += x;
33			}
34
35			static synchronized void addConsumerSum(int x) {
36			consumerSum += x;
37			}
38
39			static synchronized void checkSum() {
40			if (producerSum != consumerSum) {
41			throw new Error("CheckSum mismatch");
42			}
43			}
44
45			public static void main(String[] args) throws Exception {
46	dl	1.3	int maxPairs = NCPUS * 3 / 2;
47			int iters = 1000000;
48	dl	1.1
49	jsr166	1.6	if (args.length > 0)
50	dl	1.1	maxPairs = Integer.parseInt(args[0]);
51
52			print = true;
53	jsr166	1.11	for (int k = 1, i = 1; i <= maxPairs;) {
54	dl	1.1	System.out.println("Pairs:" + i);
55			oneTest(i, iters);
56			Thread.sleep(100);
57			if (i == k) {
58			k = i << 1;
59			i = i + (i >>> 1);
60	jsr166	1.6	}
61			else
62	dl	1.1	i = k;
63			}
64			pool.shutdown();
65	jsr166	1.10	}
66	dl	1.1
67	dl	1.3	static void oneTest(int n, int iters) throws Exception {
68			if (print)
69			System.out.print("LinkedTransferQueue ");
70			oneRun(new LinkedTransferQueue<Integer>(), n, iters);
71
72			if (print)
73			System.out.print("LinkedTransferQueue(xfer)");
74			oneRun(new LTQasSQ<Integer>(), n, iters);
75
76	dl	1.1	if (print)
77	dl	1.3	System.out.print("LinkedBlockingQueue ");
78			oneRun(new LinkedBlockingQueue<Integer>(), n, iters);
79	dl	1.1
80			if (print)
81	dl	1.3	System.out.print("LinkedBlockingQueue(cap) ");
82			oneRun(new LinkedBlockingQueue<Integer>(POOL_SIZE), n, iters);
83	dl	1.1
84			if (print)
85	dl	1.3	System.out.print("ArrayBlockingQueue(cap) ");
86			oneRun(new ArrayBlockingQueue<Integer>(POOL_SIZE), n, iters);
87	dl	1.1
88			if (print)
89	dl	1.3	System.out.print("LinkedBlockingDeque ");
90			oneRun(new LinkedBlockingDeque<Integer>(), n, iters);
91	dl	1.1
92			if (print)
93	dl	1.3	System.out.print("SynchronousQueue ");
94			oneRun(new SynchronousQueue<Integer>(), n, iters);
95	dl	1.1
96			if (print)
97	dl	1.3	System.out.print("SynchronousQueue(fair) ");
98			oneRun(new SynchronousQueue<Integer>(true), n, iters);
99	dl	1.1
100			if (print)
101	dl	1.3	System.out.print("PriorityBlockingQueue ");
102			oneRun(new PriorityBlockingQueue<Integer>(), n, iters / 16);
103
104			if (print)
105			System.out.print("ArrayBlockingQueue(fair) ");
106			oneRun(new ArrayBlockingQueue<Integer>(POOL_SIZE, true), n, iters/16);
107	dl	1.1
108			}
109	jsr166	1.6
110	jsr166	1.8	abstract static class Stage implements Runnable {
111	dl	1.1	final int iters;
112			final BlockingQueue<Integer> queue;
113			final CyclicBarrier barrier;
114	dl	1.5	final Phaser lagPhaser;
115	jsr166	1.7	Stage(BlockingQueue<Integer> q, CyclicBarrier b, Phaser s, int iters) {
116	jsr166	1.6	queue = q;
117	dl	1.1	barrier = b;
118	dl	1.5	lagPhaser = s;
119	dl	1.1	this.iters = iters;
120			}
121			}
122
123			static class Producer extends Stage {
124	dl	1.5	Producer(BlockingQueue<Integer> q, CyclicBarrier b, Phaser s, int iters) {
125			super(q, b, s, iters);
126	dl	1.1	}
127
128			public void run() {
129			try {
130			barrier.await();
131			int s = 0;
132			int l = hashCode();
133			int i = 0;
134	dl	1.3	long timeout = 1000;
135	dl	1.1	while (i < iters) {
136			l = LoopHelpers.compute4(l);
137	dl	1.3	Integer v = intPool[l & POOL_MASK];
138			if (queue.offer(v, timeout, TimeUnit.NANOSECONDS)) {
139			s += LoopHelpers.compute4(v.intValue());
140	dl	1.1	++i;
141			if (timeout > 1)
142			timeout--;
143	dl	1.5	if ((i & LAG_MASK) == LAG_MASK)
144			lagPhaser.arriveAndAwaitAdvance();
145	dl	1.1	}
146			else
147			timeout++;
148			}
149			addProducerSum(s);
150			barrier.await();
151			}
152	jsr166	1.6	catch (Exception ie) {
153			ie.printStackTrace();
154			return;
155	dl	1.1	}
156			}
157			}
158
159			static class Consumer extends Stage {
160	jsr166	1.6	Consumer(BlockingQueue<Integer> q, CyclicBarrier b, Phaser s, int iters) {
161	dl	1.5	super(q, b, s, iters);
162	dl	1.1	}
163
164			public void run() {
165			try {
166			barrier.await();
167			int l = 0;
168			int s = 0;
169			int i = 0;
170	dl	1.3	long timeout = 1000;
171	dl	1.1	while (i < iters) {
172	jsr166	1.6	Integer e = queue.poll(timeout,
173	dl	1.1	TimeUnit.NANOSECONDS);
174			if (e != null) {
175			l = LoopHelpers.compute4(e.intValue());
176			s += l;
177			++i;
178			if (timeout > 1)
179			--timeout;
180	dl	1.5	if ((i & LAG_MASK) == LAG_MASK)
181			lagPhaser.arriveAndAwaitAdvance();
182	dl	1.1	}
183			else
184			++timeout;
185			}
186			addConsumerSum(s);
187			barrier.await();
188			}
189	jsr166	1.6	catch (Exception ie) {
190			ie.printStackTrace();
191			return;
192	dl	1.1	}
193			}
194
195			}
196
197			static void oneRun(BlockingQueue<Integer> q, int npairs, int iters) throws Exception {
198			LoopHelpers.BarrierTimer timer = new LoopHelpers.BarrierTimer();
199			CyclicBarrier barrier = new CyclicBarrier(npairs * 2 + 1, timer);
200			for (int i = 0; i < npairs; ++i) {
201	dl	1.5	Phaser s = new Phaser(2);
202			pool.execute(new Producer(q, barrier, s, iters));
203			pool.execute(new Consumer(q, barrier, s, iters));
204	dl	1.1	}
205			barrier.await();
206			barrier.await();
207			long time = timer.getTime();
208			checkSum();
209	dl	1.3	q.clear();
210	dl	1.1	if (print)
211			System.out.println("\t: " + LoopHelpers.rightJustify(time / (iters * npairs)) + " ns per transfer");
212			}
213
214	dl	1.3	static final class LTQasSQ<T> extends LinkedTransferQueue<T> {
215			LTQasSQ() { super(); }
216			public void put(T x) {
217	jsr166	1.6	try { super.transfer(x);
218	dl	1.3	} catch (InterruptedException ex) { throw new Error(); }
219			}
220
221			public boolean offer(T x, long timeout, TimeUnit unit) {
222	jsr166	1.6	return super.offer(x, timeout, unit);
223	dl	1.3	}
224
225			}
226
227	dl	1.1	}