/*
* 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 org.jctools.jmh.throughput;
import org.jctools.queues.QueueByTypeFactory;
import org.openjdk.jmh.annotations.*;
import org.openjdk.jmh.infra.Blackhole;
import java.util.Queue;
import java.util.concurrent.TimeUnit;
@State(Scope.Group)
@BenchmarkMode(Mode.Throughput)
@OutputTimeUnit(TimeUnit.MICROSECONDS)
@Warmup(iterations = 5, time = 3, timeUnit = TimeUnit.SECONDS)
@Measurement(iterations = 5, time = 3, timeUnit = TimeUnit.SECONDS)
public class QueueThroughputBackoffNone {
private static final long DELAY_PRODUCER = Long.getLong("delay.p", 0L);
private static final long DELAY_CONSUMER = Long.getLong("delay.c", 0L);
Integer ONE = 777;
private Integer escape;
@Param(value = { "SpscArrayQueue", "MpscArrayQueue", "SpmcArrayQueue", "MpmcArrayQueue" })
String qType;
@Param(value = { "132000" })
String qCapacity;
Queue<Integer> q;
@Setup()
public void createQandPrimeCompilation() {
final String qType = this.qType;
q = QueueByTypeFactory.createQueue(qType, 128);
// stretch the queue to the limit, working through resizing and full
for (int i = 0; i < 128+100; i++) {
q.offer(ONE);
}
for (int i = 0; i < 128+100; i++) {
q.poll();
}
// make sure the important common case is exercised
for (int i = 0; i < 20000; i++) {
q.offer(ONE);
q.poll();
}
final String qCapacity = this.qCapacity;
this.q = QueueByTypeFactory.buildQ(qType, qCapacity);
}
@AuxCounters
@State(Scope.Thread)
public static class PollCounters {
public int pollsFailed;
public int pollsMade;
@Setup(Level.Iteration)
public void clean() {
pollsFailed = pollsMade = 0;
}
}
@AuxCounters
@State(Scope.Thread)
public static class OfferCounters {
public int offersFailed;
public int offersMade;
@Setup(Level.Iteration)
public void clean() {
offersFailed = offersMade = 0;
}
}
private static ThreadLocal<Object> marker = new ThreadLocal<Object>();
@State(Scope.Thread)
public static class ConsumerMarker {
public ConsumerMarker() {
marker.set(this);
}
}
@Benchmark
@Group("tpt")
public void offer(OfferCounters counters) {
if (!q.offer(ONE)) {
counters.offersFailed++;
backoff();
} else {
counters.offersMade++;
}
if (DELAY_PRODUCER != 0) {
Blackhole.consumeCPU(DELAY_PRODUCER);
}
}
protected void backoff() {
}
@Benchmark
@Group("tpt")
public void poll(PollCounters counters, ConsumerMarker cm) {
Integer e = q.poll();
if (e == null) {
counters.pollsFailed++;
backoff();
} else if (e == ONE) {
counters.pollsMade++;
} else {
escape = e;
}
if (DELAY_CONSUMER != 0) {
Blackhole.consumeCPU(DELAY_CONSUMER);
}
}
@TearDown(Level.Iteration)
public void emptyQ() {
if (marker.get() == null)
return;
// sadly the iteration tear down is performed from each participating thread, so we need to guess
// which is which (can't have concurrent access to poll).
q.clear();
}
}