| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF 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.apache.activemq.artemis.tests.performance.jmh; |
| |
| import java.util.SplittableRandom; |
| |
| import org.apache.activemq.artemis.api.core.SimpleString; |
| import org.apache.activemq.artemis.core.persistence.impl.nullpm.NullStorageManager; |
| import org.apache.activemq.artemis.core.postoffice.DuplicateIDCache; |
| import org.apache.activemq.artemis.core.postoffice.impl.DuplicateIDCaches; |
| import org.apache.activemq.artemis.utils.RandomUtil; |
| import org.openjdk.jmh.annotations.Benchmark; |
| import org.openjdk.jmh.annotations.Fork; |
| import org.openjdk.jmh.annotations.Measurement; |
| import org.openjdk.jmh.annotations.Param; |
| 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.Warmup; |
| |
| @State(Scope.Benchmark) |
| @Fork(2) |
| @Warmup(iterations = 5, time = 1) |
| @Measurement(iterations = 8, time = 1) |
| public class DuplicateIDCacheBenchmark { |
| |
| @Param({"20000"}) |
| private int size; |
| @Param({"false", "true"}) |
| private boolean persist; |
| |
| private DuplicateIDCache cache; |
| |
| private byte[][] ids; |
| private int idsMask; |
| private int missingIdsMask; |
| private long nextId; |
| private byte[][] randomEvictedIds; |
| |
| @Setup |
| public void init() throws Exception { |
| cache = persist ? |
| DuplicateIDCaches.persistent(SimpleString.toSimpleString("benchmark"), size, new NullStorageManager()) : |
| DuplicateIDCaches.inMemory(SimpleString.toSimpleString("benchmark"), size); |
| final int idSize = findNextHigherPowerOf2(size); |
| idsMask = idSize - 1; |
| nextId = 0; |
| ids = new byte[idSize][]; |
| // fill the cache |
| for (int i = 0; i < size; i++) { |
| final byte[] id = RandomUtil.randomBytes(); |
| ids[i] = id; |
| cache.addToCache(id, null, true); |
| } |
| // evict the first (idSize - size) elements on the ids array. |
| // Given that being a FIFO cache isn't a stable contract it's going to validate it too. |
| final int evicted = idSize - size; |
| for (int i = 0; i < evicted; i++) { |
| final byte[] id = RandomUtil.randomBytes(); |
| ids[size + i] = id; |
| cache.addToCache(id, null, true); |
| // check correctness of eviction policy |
| if (cache.contains(ids[i])) { |
| throw new AssertionError("This cache isn't using anymore a FIFO eviction strategy or its real capacity is > " + size); |
| } |
| } |
| // always use the same seed! |
| SplittableRandom random = new SplittableRandom(0); |
| // set it big enough to trick branch predictors |
| final int evictedIdsLength = findNextPowerOf2(Math.max(1024, evicted)); |
| missingIdsMask = evictedIdsLength - 1; |
| randomEvictedIds = new byte[evictedIdsLength][]; |
| for (int i = 0; i < evictedIdsLength; i++) { |
| final int id = random.nextInt(0, evicted); |
| randomEvictedIds[i] = ids[id]; |
| // check correctness of eviction policy |
| if (cache.contains(ids[id])) { |
| throw new AssertionError("This cache isn't using anymore a FIFO eviction strategy"); |
| } |
| } |
| } |
| |
| // it isn't checking what's the max power of 2 number nor if size > 0 |
| private static int findNextHigherPowerOf2(int size) { |
| final int nextPow2 = findNextPowerOf2(size); |
| if (nextPow2 > size) { |
| return nextPow2; |
| } |
| return nextPow2 * 2; |
| } |
| |
| private static int findNextPowerOf2(int size) { |
| return 1 << (32 - Integer.numberOfLeadingZeros(size - 1)); |
| } |
| |
| private byte[] nextId() { |
| final long seq = nextId; |
| final int index = (int) (seq & idsMask); |
| nextId = seq + 1; |
| return ids[index]; |
| } |
| |
| private byte[] nextMissingId() { |
| final long seq = nextId; |
| final int index = (int) (seq & missingIdsMask); |
| nextId = seq + 1; |
| return randomEvictedIds[index]; |
| } |
| |
| @Benchmark |
| public boolean atomicVerify() throws Exception { |
| return cache.atomicVerify(nextId(), null); |
| } |
| |
| @Benchmark |
| public boolean containsMissingId() { |
| return cache.contains(nextMissingId()); |
| } |
| |
| @TearDown |
| public void clear() throws Exception { |
| cache.clear(); |
| } |
| |
| } |