/**
* Copyright 2013, Landz and its contributors. All rights reserved.
*
* 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 z.channel.contrast.mpmc;
import org.junit.Test;
import z.znr.Affinity;
import java.util.concurrent.ConcurrentLinkedQueue;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.ThreadLocalRandom;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.IntStream;
import static z.util.Throwables.uncheck;
/**
* 60000000
* MPMCQueue done with costed time: 7,657,119,575
* CLQStressTest done with costed time: 46,391,598,873
*
*/
public class CLQStressTest {
private static final int RUNS = 60_000_000;//100_000_000;
private ConcurrentLinkedQueue<Long> queue = new ConcurrentLinkedQueue();
private final AtomicInteger counter = new AtomicInteger();
@Test
public void testCLQ() {
Affinity.bindTo(
Affinity.Topology.socket(0).physicalCore(0).virtualCore(0));
// for (int i = 0; i < 5; i++)
runStress("#" + 1);
}
private void runStress(String label) {
System.out.println("=====in Round "+label);
CountDownLatch startLatch = new CountDownLatch(1);
CountDownLatch endLatch = new CountDownLatch(7);
Long[] values = new Long[RUNS];
ThreadLocalRandom rnd = ThreadLocalRandom.current();
IntStream.range(0, RUNS).forEach( i->
values[i]=rnd.nextLong(0,Long.MAX_VALUE)
);
System.out.println("start stress...");
//
// IntStream.range(0,7).forEach(i->{
// });
spawnConsumer(0,1,queue,startLatch,endLatch).start();
spawnConsumer(1,0,queue,startLatch,endLatch).start();
spawnConsumer(1,1,queue,startLatch,endLatch).start();
spawnConsumer(2,0,queue,startLatch,endLatch).start();
spawnConsumer(2,1,queue,startLatch,endLatch).start();
spawnConsumer(3,0,queue,startLatch,endLatch).start();
spawnConsumer(3,1,queue,startLatch,endLatch).start();
startLatch.countDown();
try {
long s = System.nanoTime();
//XXX: producer is in main thread
for (int i=0;i<RUNS;i++) {
// System.out.println(i);
while (!queue.offer(values[i])){
// Unsafes.UNSAFE.park(false, 200);
}
}
// System.out.printf("sent out %d values\n", RUNS);
endLatch.await();
long time = System.nanoTime()-s;
System.out.println(counter.get());
System.out.printf("CLQStressTest " +
"done with costed time: %,d\n",time);
}catch (Exception e){e.printStackTrace();}
}
private Thread spawnConsumer(
int physicalCoreId,
int virtualCoreId,
ConcurrentLinkedQueue<Long> queue,
CountDownLatch startLatch,
CountDownLatch endLatch) {
return
new Thread(() -> {
Affinity.bindTo(
Affinity.Topology.
socket(0).
physicalCore(physicalCoreId).
virtualCore(virtualCoreId));
uncheck(() -> startLatch.await());
Long v=null;
while ((counter.get()<RUNS)) {
while ( null==(v=queue.poll()) &&
(counter.get()<RUNS) ) {
// Unsafes.UNSAFE.park(false, 50);//Thread.yield();//
}
if (v!=null) {
counter.incrementAndGet();
}
}
// System.out.println(counter.get());
endLatch.countDown();
});
}
}