benchmarks/src/main/java/io/druid/benchmark/StupidPoolConcurrencyBenchmark.java

/*
 * Licensed to Metamarkets Group Inc. (Metamarkets) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  Metamarkets 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 io.druid.benchmark;

import com.google.common.base.Supplier;
import com.google.common.io.Closer;
import com.metamx.common.logger.Logger;
import io.druid.collections.ResourceHolder;
import io.druid.collections.StupidPool;
import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.BenchmarkMode;
import org.openjdk.jmh.annotations.Level;
import org.openjdk.jmh.annotations.Mode;
import org.openjdk.jmh.annotations.OperationsPerInvocation;
import org.openjdk.jmh.annotations.OutputTimeUnit;
import org.openjdk.jmh.annotations.Scope;
import org.openjdk.jmh.annotations.Setup;
import org.openjdk.jmh.annotations.State;
import org.openjdk.jmh.annotations.TearDown;
import org.openjdk.jmh.annotations.Threads;
import org.openjdk.jmh.infra.Blackhole;

import java.io.IOException;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicLong;

@State(Scope.Benchmark)
public class StupidPoolConcurrencyBenchmark
{
  private static final Logger log = new Logger(StupidPoolConcurrencyBenchmark.class);


  @Setup(Level.Iteration)
  public void setup() throws IOException
  {

  }

  @TearDown(Level.Iteration)
  public void teardown()
  {

  }

  private static final Object simpleObject = new Object();

  @State(Scope.Benchmark)
  public static class BenchmarkPool
  {
    private final AtomicLong numPools = new AtomicLong(0L);
    private final StupidPool<Object> pool = new StupidPool<>(
        new Supplier<Object>()
        {
          @Override
          public Object get()
          {
            numPools.incrementAndGet();
            return simpleObject;
          }
        }
    );
  }

  @Benchmark
  @BenchmarkMode(Mode.Throughput)
  @OutputTimeUnit(TimeUnit.MICROSECONDS)
  public void hammerQueue(BenchmarkPool pool, Blackhole blackhole) throws IOException
  {
    try(ResourceHolder<Object> holder = pool.pool.take()){
      blackhole.consume(holder);
    }
  }
}