test/loops/SingleProducerMultipleConsumerLoops.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/licenses/publicdomain
 */

import java.util.concurrent.*;
//import jsr166y.*;

public class SingleProducerMultipleConsumerLoops {
    static final int NCPUS = Runtime.getRuntime().availableProcessors();

    // Number of puts by producers or takes by consumers
    static final int ITERS = 1 << 20;

    static final ExecutorService pool = Executors.newCachedThreadPool();
    static boolean print = false;

    // 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);
    }

    public static void main(String[] args) throws Exception {
        int maxn = 12;

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

        print = false;
        warmup();
        print = true;

        int k = 1;
        for (int i = 1; i <= maxn;) {
            System.out.println("Consumers:" + i);
            oneTest(i, ITERS);
            if (i == k) {
                k = i << 1;
                i = i + (i >>> 1);
            }
            else
                i = k;
        }

        pool.shutdown();
   }

    static void warmup() throws Exception {
        print = false;
        System.out.print("Warmup ");
        int it = 2000;
        for (int j = 5; j > 0; --j) {
            oneTest(j, it);
            System.out.print(".");
            it += 1000;
        }
        System.gc();
        it = 20000;
        for (int j = 5; j > 0; --j) {
            oneTest(j, it);
            System.out.print(".");
            it += 10000;
        }
        System.gc();
        System.out.println();
    }

    static void oneTest(int n, int iters) throws Exception {
        int fairIters = iters/16;

        Thread.sleep(100); // System.gc();
        if (print)
            System.out.print("LinkedTransferQueue     ");
        oneRun(new LinkedTransferQueue<Integer>(), n, iters);

        Thread.sleep(100); // System.gc();
        if (print)
            System.out.print("LinkedBlockingQueue     ");
        oneRun(new LinkedBlockingQueue<Integer>(), n, iters);

        Thread.sleep(100); // System.gc();
        if (print)
            System.out.print("LinkedBlockingQueue(cap)");
        oneRun(new LinkedBlockingQueue<Integer>(POOL_SIZE), n, iters);

        Thread.sleep(100); // System.gc();
        if (print)
            System.out.print("LinkedBlockingDeque     ");
        oneRun(new LinkedBlockingDeque<Integer>(), n, iters);

        Thread.sleep(100); // System.gc();
        if (print)
            System.out.print("ArrayBlockingQueue      ");
        oneRun(new ArrayBlockingQueue<Integer>(POOL_SIZE), n, iters);

        Thread.sleep(100); // System.gc();
        if (print)
            System.out.print("SynchronousQueue        ");
        oneRun(new SynchronousQueue<Integer>(), n, iters);

        Thread.sleep(100); // System.gc();
        if (print)
            System.out.print("SynchronousQueue(fair)  ");
        oneRun(new SynchronousQueue<Integer>(true), n, iters);

        Thread.sleep(100); // System.gc();
        if (print)
            System.out.print("LinkedTransferQueue(xfer)");
        oneRun(new LTQasSQ<Integer>(), n, iters);

        Thread.sleep(100); // System.gc();
        if (print)
            System.out.print("LinkedTransferQueue(half)");
        oneRun(new HalfSyncLTQ<Integer>(), n, iters);

        Thread.sleep(100); // System.gc();
        if (print)
            System.out.print("PriorityBlockingQueue   ");
        oneRun(new PriorityBlockingQueue<Integer>(), n, fairIters);

        Thread.sleep(100); // System.gc();
        if (print)
            System.out.print("ArrayBlockingQueue(fair)");
        oneRun(new ArrayBlockingQueue<Integer>(POOL_SIZE, true), n, fairIters);

    }

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

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

        public void run() {
            try {
                barrier.await();
                int r = hashCode();
                for (int i = 0; i < iters; ++i) {
                    r = LoopHelpers.compute7(r);
                    Integer v = intPool[r & POOL_MASK];
                    queue.put(v);
                }
                barrier.await();
                result = 432;
            }
            catch (Exception ie) {
                ie.printStackTrace();
                return;
            }
        }
    }

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

        }

        public void run() {
            try {
                barrier.await();
                int l = 0;
                int s = 0;
                for (int i = 0; i < iters; ++i) {
                    Integer item = queue.take();
                    s += item.intValue();
                }
                barrier.await();
                result = s;
                if (s == 0) System.out.print(" ");
            }
            catch (Exception ie) {
                ie.printStackTrace();
                return;
            }
        }

    }

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

    static final class HalfSyncLTQ<T> extends LinkedTransferQueue<T> {
        int calls;
        HalfSyncLTQ() { super(); }
        public void put(T x) {
            if ((++calls & 1) == 0)
                super.put(x);
            else {
                try { super.transfer(x);
                } catch (InterruptedException ex) {
                    throw new Error();
                }
            }
        }
    }

}
Revision:	1.6
Committed:	Mon Sep 27 19:15:16 2010 UTC (13 years, 7 months ago) by jsr166
Branch:	MAIN
Changes since 1.5:	+1 -1 lines
Log Message:	use blessed declaration modifier order
#	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			* http://creativecommons.org/licenses/publicdomain
5	dl	1.1	*/
6
7			import java.util.concurrent.*;
8	dl	1.3	//import jsr166y.*;
9	dl	1.1
10			public class SingleProducerMultipleConsumerLoops {
11	dl	1.3	static final int NCPUS = Runtime.getRuntime().availableProcessors();
12
13			// Number of puts by producers or takes by consumers
14			static final int ITERS = 1 << 20;
15	dl	1.1
16			static final ExecutorService pool = Executors.newCachedThreadPool();
17			static boolean print = false;
18
19	dl	1.3	// Number of elements passed around -- must be power of two
20			// Elements are reused from pool to minimize alloc impact
21			static final int POOL_SIZE = 1 << 8;
22			static final int POOL_MASK = POOL_SIZE-1;
23			static final Integer[] intPool = new Integer[POOL_SIZE];
24			static {
25	jsr166	1.4	for (int i = 0; i < POOL_SIZE; ++i)
26	dl	1.3	intPool[i] = Integer.valueOf(i);
27			}
28
29	dl	1.1	public static void main(String[] args) throws Exception {
30	dl	1.3	int maxn = 12;
31	dl	1.1
32	jsr166	1.4	if (args.length > 0)
33	dl	1.3	maxn = Integer.parseInt(args[0]);
34	dl	1.1
35			print = false;
36	dl	1.3	warmup();
37	dl	1.1	print = true;
38	dl	1.3
39			int k = 1;
40			for (int i = 1; i <= maxn;) {
41	dl	1.1	System.out.println("Consumers:" + i);
42	dl	1.3	oneTest(i, ITERS);
43			if (i == k) {
44			k = i << 1;
45			i = i + (i >>> 1);
46	jsr166	1.4	}
47			else
48	dl	1.3	i = k;
49	dl	1.1	}
50	jsr166	1.4
51	dl	1.1	pool.shutdown();
52			}
53
54	dl	1.3	static void warmup() throws Exception {
55			print = false;
56			System.out.print("Warmup ");
57			int it = 2000;
58			for (int j = 5; j > 0; --j) {
59	jsr166	1.4	oneTest(j, it);
60	dl	1.3	System.out.print(".");
61			it += 1000;
62			}
63			System.gc();
64			it = 20000;
65			for (int j = 5; j > 0; --j) {
66	jsr166	1.4	oneTest(j, it);
67	dl	1.3	System.out.print(".");
68			it += 10000;
69			}
70			System.gc();
71			System.out.println();
72			}
73
74			static void oneTest(int n, int iters) throws Exception {
75			int fairIters = iters/16;
76
77			Thread.sleep(100); // System.gc();
78	dl	1.1	if (print)
79	dl	1.3	System.out.print("LinkedTransferQueue ");
80			oneRun(new LinkedTransferQueue<Integer>(), n, iters);
81	dl	1.1
82	dl	1.3	Thread.sleep(100); // System.gc();
83	dl	1.1	if (print)
84			System.out.print("LinkedBlockingQueue ");
85	dl	1.3	oneRun(new LinkedBlockingQueue<Integer>(), n, iters);
86	dl	1.1
87	dl	1.3	Thread.sleep(100); // System.gc();
88	dl	1.1	if (print)
89	dl	1.3	System.out.print("LinkedBlockingQueue(cap)");
90			oneRun(new LinkedBlockingQueue<Integer>(POOL_SIZE), n, iters);
91
92			Thread.sleep(100); // System.gc();
93			if (print)
94			System.out.print("LinkedBlockingDeque ");
95			oneRun(new LinkedBlockingDeque<Integer>(), n, iters);
96	jsr166	1.4
97	dl	1.3	Thread.sleep(100); // System.gc();
98			if (print)
99			System.out.print("ArrayBlockingQueue ");
100			oneRun(new ArrayBlockingQueue<Integer>(POOL_SIZE), n, iters);
101	dl	1.1
102	dl	1.3	Thread.sleep(100); // System.gc();
103	dl	1.1	if (print)
104			System.out.print("SynchronousQueue ");
105	dl	1.3	oneRun(new SynchronousQueue<Integer>(), n, iters);
106	jsr166	1.4
107	dl	1.3	Thread.sleep(100); // System.gc();
108			if (print)
109			System.out.print("SynchronousQueue(fair) ");
110			oneRun(new SynchronousQueue<Integer>(true), n, iters);
111
112			Thread.sleep(100); // System.gc();
113			if (print)
114			System.out.print("LinkedTransferQueue(xfer)");
115			oneRun(new LTQasSQ<Integer>(), n, iters);
116	dl	1.1
117	dl	1.3	Thread.sleep(100); // System.gc();
118			if (print)
119			System.out.print("LinkedTransferQueue(half)");
120			oneRun(new HalfSyncLTQ<Integer>(), n, iters);
121	jsr166	1.4
122	dl	1.3	Thread.sleep(100); // System.gc();
123			if (print)
124			System.out.print("PriorityBlockingQueue ");
125			oneRun(new PriorityBlockingQueue<Integer>(), n, fairIters);
126
127			Thread.sleep(100); // System.gc();
128	dl	1.1	if (print)
129			System.out.print("ArrayBlockingQueue(fair)");
130	dl	1.3	oneRun(new ArrayBlockingQueue<Integer>(POOL_SIZE, true), n, fairIters);
131
132	dl	1.1	}
133	jsr166	1.4
134	jsr166	1.6	abstract static class Stage implements Runnable {
135	dl	1.1	final int iters;
136			final BlockingQueue<Integer> queue;
137			final CyclicBarrier barrier;
138			volatile int result;
139	jsr166	1.5	Stage(BlockingQueue<Integer> q, CyclicBarrier b, int iters) {
140	jsr166	1.4	queue = q;
141	dl	1.1	barrier = b;
142			this.iters = iters;
143			}
144			}
145
146			static class Producer extends Stage {
147			Producer(BlockingQueue<Integer> q, CyclicBarrier b, int iters) {
148			super(q, b, iters);
149			}
150
151			public void run() {
152			try {
153			barrier.await();
154	dl	1.3	int r = hashCode();
155	dl	1.1	for (int i = 0; i < iters; ++i) {
156	dl	1.3	r = LoopHelpers.compute7(r);
157			Integer v = intPool[r & POOL_MASK];
158			queue.put(v);
159	dl	1.1	}
160			barrier.await();
161			result = 432;
162			}
163	jsr166	1.4	catch (Exception ie) {
164			ie.printStackTrace();
165			return;
166	dl	1.1	}
167			}
168			}
169
170			static class Consumer extends Stage {
171	jsr166	1.4	Consumer(BlockingQueue<Integer> q, CyclicBarrier b, int iters) {
172	dl	1.1	super(q, b, iters);
173	dl	1.3
174	dl	1.1	}
175
176			public void run() {
177			try {
178			barrier.await();
179			int l = 0;
180			int s = 0;
181			for (int i = 0; i < iters; ++i) {
182			Integer item = queue.take();
183	dl	1.3	s += item.intValue();
184	dl	1.1	}
185			barrier.await();
186			result = s;
187	dl	1.3	if (s == 0) System.out.print(" ");
188	dl	1.1	}
189	jsr166	1.4	catch (Exception ie) {
190			ie.printStackTrace();
191			return;
192	dl	1.1	}
193			}
194
195			}
196
197			static void oneRun(BlockingQueue<Integer> q, int nconsumers, int iters) throws Exception {
198			LoopHelpers.BarrierTimer timer = new LoopHelpers.BarrierTimer();
199			CyclicBarrier barrier = new CyclicBarrier(nconsumers + 2, timer);
200			pool.execute(new Producer(q, barrier, iters * nconsumers));
201			for (int i = 0; i < nconsumers; ++i) {
202			pool.execute(new Consumer(q, barrier, iters));
203			}
204			barrier.await();
205			barrier.await();
206			long time = timer.getTime();
207			if (print)
208			System.out.println("\t: " + LoopHelpers.rightJustify(time / (iters * nconsumers)) + " ns per transfer");
209			}
210
211	dl	1.3	static final class LTQasSQ<T> extends LinkedTransferQueue<T> {
212			LTQasSQ() { super(); }
213			public void put(T x) {
214	jsr166	1.4	try { super.transfer(x);
215	dl	1.3	} catch (InterruptedException ex) { throw new Error(); }
216			}
217			}
218
219			static final class HalfSyncLTQ<T> extends LinkedTransferQueue<T> {
220			int calls;
221			HalfSyncLTQ() { super(); }
222			public void put(T x) {
223			if ((++calls & 1) == 0)
224			super.put(x);
225			else {
226	jsr166	1.4	try { super.transfer(x);
227			} catch (InterruptedException ex) {
228			throw new Error();
229	dl	1.3	}
230			}
231			}
232			}
233
234	dl	1.1	}