LockfreeStackPerf.java

package rx.internal;

import java.util.Deque;
import java.util.concurrent.*;

import org.openjdk.jmh.annotations.*;
import org.openjdk.jmh.infra.Control;

import rx.internal.util.ArrayBasedLockFreeStack;

/**
 * Benchmark lock free stack.
 * <p>
 * gradlew benchmarks "-Pjmh=-f 1 -tu s -bm thrpt -wi 5 -i 5 -r 1 .*LockfreeStackPerf.*"
 * <p>
 * gradlew benchmarks "-Pjmh=-f 1 -tu ns -bm avgt -wi 5 -i 5 -r 1 .*LockfreeStackPerf.*"
 */
@BenchmarkMode(Mode.Throughput)
@OutputTimeUnit(TimeUnit.SECONDS)
@Threads(2)
@State(Scope.Group)
public class LockfreeStackPerf {
    final Integer ONE = new Integer(1);
    final Integer TWO = new Integer(2);
    final ArrayBasedLockFreeStack<Integer> stack = new ArrayBasedLockFreeStack<Integer>(8);
    final Deque<Integer> stack2 = new ConcurrentLinkedDeque<Integer>();
    @Param({"100000", "1000000"})
    int loop;
    @Benchmark
    @Group("tpt")
    @GroupThreads(1)
    public void offer(Control cnt) {
        int i = loop;
        while (i-- > 0) {
            stack2.push(ONE);
            stack2.pop();
        }
    }

    @Benchmark
    @Group("tpt")
    @GroupThreads(1)
    public void poll(Control cnt) {
        int i = loop;
        while (i-- > 0) {
            stack2.push(TWO);
            stack2.pop();
        }
    }
    
    @Benchmark
    @Group("tpt2")
    @GroupThreads(1)
    public void offer2(Control cnt) {
        int i = loop;
        while (i-- > 0) {
            stack2.push(ONE);
            stack2.pop();
        }
    }

    @Benchmark
    @Group("tpt2")
    @GroupThreads(1)
    public void poll2(Control cnt) {
        int i = loop;
        while (i-- > 0) {
            stack2.push(TWO);
            stack2.pop();
        }
    }
}