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jsr166 |
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/* |
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* Written by Haim Yadid with assistance from members of JCP JSR-166 |
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* Expert Group and released to the public domain, as explained at |
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* http://creativecommons.org/publicdomain/zero/1.0/ |
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*/ |
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package jsr166.bench.concq; |
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import org.openjdk.jmh.annotations.Benchmark; |
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import org.openjdk.jmh.annotations.BenchmarkMode; |
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import org.openjdk.jmh.annotations.Fork; |
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import org.openjdk.jmh.annotations.Measurement; |
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import org.openjdk.jmh.annotations.Mode; |
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import org.openjdk.jmh.annotations.Scope; |
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import org.openjdk.jmh.annotations.Setup; |
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import org.openjdk.jmh.annotations.State; |
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import org.openjdk.jmh.annotations.Threads; |
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import org.openjdk.jmh.annotations.Warmup; |
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import java.util.Queue; |
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import java.util.concurrent.ArrayBlockingQueue; |
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import java.util.concurrent.ConcurrentLinkedDeque; |
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import java.util.concurrent.ExecutionException; |
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/** |
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* Demonstrates performance failure fixed by |
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* https://bugs.openjdk.java.net/browse/JDK-8054446 |
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*/ |
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@Fork(1) |
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@Threads(1) |
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@BenchmarkMode({Mode.Throughput}) |
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@Warmup(iterations = 5) |
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@Measurement(iterations = 5) |
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public class ConcurrentQueueOfferRemove { |
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static final String a = "a"; |
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static final String b = "b"; |
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public static final int NUM_PRE = 1; |
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@State(Scope.Benchmark) |
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public static class ArrayBlockingQueueState { |
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Queue<String> queue = new ArrayBlockingQueue<String>(1000); |
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@Setup |
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public void setup() throws ExecutionException, InterruptedException { |
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for (int i = 0; i < NUM_PRE; i++) queue.offer(a); |
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} |
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} |
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@Benchmark |
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public Object measureABQ(final ArrayBlockingQueueState arrayBlockingQueueState) throws Exception { |
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Queue queue = arrayBlockingQueueState.queue; |
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queue.offer(b); |
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return queue.remove(b); |
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} |
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@State(Scope.Benchmark) |
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public static class ConcurrentLinkedDequeState { |
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Queue<String> queue = new ConcurrentLinkedDeque<>(); |
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@Setup |
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public void setup() throws ExecutionException, InterruptedException { |
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for (int i = 0; i < NUM_PRE; i++) queue.offer(a); |
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} |
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} |
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@Benchmark |
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public Object measureCLD(final ConcurrentLinkedDequeState concurrentLinkedDequeState) throws Exception { |
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Queue queue = concurrentLinkedDequeState.queue; |
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queue.offer(b); |
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return queue.remove(b); |
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} |
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// @State(Scope.Benchmark) |
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// public static class ConcurrentLinkedQueueState { |
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// // A concurrentLinked Queue with the remove function replaced |
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// // with jdk9 version |
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// Queue<String> queue = new ConcurrentLinkedQueueFixed<>(); |
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// @Setup |
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// public void setup() throws ExecutionException, InterruptedException { |
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// for (int i = 0; i < NUM_PRE; i++) queue.offer(a); |
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// } |
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// } |
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@Benchmark |
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public Object measureCLQFixed(final ConcurrentLinkedQueueState concurrentLinkedQueueState) throws Exception { |
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Queue queue = concurrentLinkedQueueState.queue; |
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queue.offer(b); |
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return queue.remove(b); |
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} |
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@State(Scope.Benchmark) |
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public static class ConcurrentLinkedQueueOrigState { |
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Queue<String> queue = new java.util.concurrent.ConcurrentLinkedQueue<>(); |
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@Setup |
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public void setup() throws ExecutionException, InterruptedException { |
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for (int i = 0; i < NUM_PRE; i++) queue.offer(a); |
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} |
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} |
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@Benchmark |
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public Object measureCLQOrig(final ConcurrentLinkedQueueOrigState state) throws Exception { |
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Queue queue = state.queue; |
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queue.offer(b); |
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return queue.remove(b); |
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} |
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} |
