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* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch licenses this file to you 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 org.elasticsearch.benchmark.counter;
import org.elasticsearch.common.StopWatch;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.atomic.AtomicLong;
/**
*
*/
public class SimpleCounterBenchmark {
private static long NUMBER_OF_ITERATIONS = 10000000;
private static int NUMBER_OF_THREADS = 100;
public static void main(String[] args) throws Exception {
final AtomicLong counter = new AtomicLong();
StopWatch stopWatch = new StopWatch().start();
System.out.println("Running " + NUMBER_OF_ITERATIONS);
for (long i = 0; i < NUMBER_OF_ITERATIONS; i++) {
counter.incrementAndGet();
}
System.out.println("Took " + stopWatch.stop().totalTime() + " TP Millis " + (NUMBER_OF_ITERATIONS / stopWatch.totalTime().millisFrac()));
System.out.println("Running using " + NUMBER_OF_THREADS + " threads with " + NUMBER_OF_ITERATIONS + " iterations");
final CountDownLatch latch = new CountDownLatch(NUMBER_OF_THREADS);
Thread[] threads = new Thread[NUMBER_OF_THREADS];
for (int i = 0; i < threads.length; i++) {
threads[i] = new Thread(new Runnable() {
@Override
public void run() {
for (long i = 0; i < NUMBER_OF_ITERATIONS; i++) {
counter.incrementAndGet();
}
latch.countDown();
}
});
}
stopWatch = new StopWatch().start();
for (Thread thread : threads) {
thread.start();
}
latch.await();
stopWatch.stop();
System.out.println("Took " + stopWatch.totalTime() + " TP Millis " + ((NUMBER_OF_ITERATIONS * NUMBER_OF_THREADS) / stopWatch.totalTime().millisFrac()));
}
}