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/*
* Copyright 2011 LMAX Ltd.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.lmax.disruptor.sequenced;
import static com.lmax.disruptor.RingBuffer.createSingleProducer;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import com.lmax.disruptor.AbstractPerfTestDisruptor;
import com.lmax.disruptor.BatchEventProcessor;
import com.lmax.disruptor.EventFactory;
import com.lmax.disruptor.RingBuffer;
import com.lmax.disruptor.SequenceBarrier;
import com.lmax.disruptor.YieldingWaitStrategy;
import com.lmax.disruptor.support.LongArrayEventHandler;
import com.lmax.disruptor.support.PerfTestUtil;
import com.lmax.disruptor.util.DaemonThreadFactory;
/**
* <pre>
* UniCast a series of items between 1 publisher and 1 event processor.
*
* +----+ +-----+
* | P1 |--->| EP1 |
* +----+ +-----+
*
* Disruptor:
* ==========
* track to prevent wrap
* +------------------+
* | |
* | v
* +----+ +====+ +====+ +-----+
* | P1 |--->| RB |<---| SB | | EP1 |
* +----+ +====+ +====+ +-----+
* claim get ^ |
* | |
* +--------+
* waitFor
*
* P1 - Publisher 1
* RB - RingBuffer
* SB - SequenceBarrier
* EP1 - EventProcessor 1
*
* </pre>
*/
public final class OneToOneSequencedLongArrayThroughputTest extends AbstractPerfTestDisruptor
{
private static final int BUFFER_SIZE = 1024 * 1;
private static final long ITERATIONS = 1000L * 1000L * 1L;
private static final int ARRAY_SIZE = 2 * 1024;
private final ExecutorService executor = Executors.newSingleThreadExecutor(DaemonThreadFactory.INSTANCE);
private static final EventFactory<long[]> FACTORY = new EventFactory<long[]>()
{
@Override
public long[] newInstance()
{
return new long[ARRAY_SIZE];
}
};
///////////////////////////////////////////////////////////////////////////////////////////////
private final RingBuffer<long[]> ringBuffer =
createSingleProducer(FACTORY, BUFFER_SIZE, new YieldingWaitStrategy());
private final SequenceBarrier sequenceBarrier = ringBuffer.newBarrier();
private final LongArrayEventHandler handler = new LongArrayEventHandler();
private final BatchEventProcessor<long[]> batchEventProcessor = new BatchEventProcessor<long[]>(ringBuffer, sequenceBarrier, handler);
{
ringBuffer.addGatingSequences(batchEventProcessor.getSequence());
}
///////////////////////////////////////////////////////////////////////////////////////////////
@Override
protected int getRequiredProcessorCount()
{
return 2;
}
@Override
protected long runDisruptorPass() throws InterruptedException
{
final CountDownLatch latch = new CountDownLatch(1);
long expectedCount = batchEventProcessor.getSequence().get() + ITERATIONS;
handler.reset(latch, ITERATIONS);
executor.submit(batchEventProcessor);
long start = System.currentTimeMillis();
final RingBuffer<long[]> rb = ringBuffer;
for (long i = 0; i < ITERATIONS; i++)
{
long next = rb.next();
long[] event = rb.get(next);
for (int j = 0; j < event.length; j++)
{
event[j] = i;
}
rb.publish(next);
}
latch.await();
long opsPerSecond = (ITERATIONS * ARRAY_SIZE * 1000L) / (System.currentTimeMillis() - start);
waitForEventProcessorSequence(expectedCount);
batchEventProcessor.halt();
PerfTestUtil.failIf(0, handler.getValue());
return opsPerSecond;
}
private void waitForEventProcessorSequence(long expectedCount) throws InterruptedException
{
while (batchEventProcessor.getSequence().get() != expectedCount)
{
Thread.sleep(1);
}
}
public static void main(String[] args) throws Exception
{
OneToOneSequencedLongArrayThroughputTest test = new OneToOneSequencedLongArrayThroughputTest();
test.testImplementations();
}
}
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