| /* |
| * 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.cassandra.test.microbench; |
| |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.Comparator; |
| import java.util.UUID; |
| import java.util.concurrent.TimeUnit; |
| |
| import org.apache.cassandra.utils.btree.BTreeSearchIterator; |
| import org.apache.cassandra.utils.btree.BTree; |
| import org.apache.cassandra.utils.btree.BTree.Dir; |
| import org.apache.cassandra.utils.btree.FullBTreeSearchIterator; |
| import org.apache.cassandra.utils.btree.LeafBTreeSearchIterator; |
| import org.apache.cassandra.utils.btree.UpdateFunction; |
| import org.openjdk.jmh.annotations.Benchmark; |
| import org.openjdk.jmh.annotations.BenchmarkMode; |
| import org.openjdk.jmh.annotations.Fork; |
| import org.openjdk.jmh.annotations.Level; |
| import org.openjdk.jmh.annotations.Measurement; |
| import org.openjdk.jmh.annotations.Mode; |
| import org.openjdk.jmh.annotations.OperationsPerInvocation; |
| import org.openjdk.jmh.annotations.OutputTimeUnit; |
| 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.Threads; |
| import org.openjdk.jmh.annotations.Warmup; |
| |
| @BenchmarkMode(Mode.SampleTime) |
| @OutputTimeUnit(TimeUnit.NANOSECONDS) |
| @Warmup(iterations = 1, time = 1, timeUnit = TimeUnit.SECONDS) |
| @Measurement(iterations = 2, time = 4, timeUnit = TimeUnit.SECONDS) |
| @Fork(value = 2) |
| @Threads(1) |
| @State(Scope.Benchmark) |
| public class BTreeSearchIteratorBench |
| { |
| private final int btreeSize = 32; |
| |
| @Param({"TREE", "LEAF"}) |
| private String iteratorType; |
| |
| @Param({ "0", "1", "2", "3", "16", "17", "18", "19", |
| "24", "25", "26", "30", "31" }) |
| private int targetIdx; |
| |
| private final int cellSize = 1000; |
| |
| @Param({"ASC", "DESC"}) |
| private String dirParam; |
| |
| private Dir dir; |
| private Object[] btree; |
| private ArrayList<String> data; |
| private ArrayList<String> nonExistData; |
| |
| private static ArrayList<String> seq(int count, int minCellSize) |
| { |
| ArrayList<String> ret = new ArrayList<>(); |
| for (int i = 0 ; i < count ; i++) |
| { |
| StringBuilder sb = new StringBuilder(); |
| while (sb.length() < minCellSize) |
| { |
| String uuid = UUID.randomUUID().toString(); |
| sb.append(uuid); |
| } |
| ret.add(sb.toString()); |
| } |
| Collections.sort(ret); |
| return ret; |
| } |
| |
| private static final Comparator<String> CMP = new Comparator<String>() |
| { |
| public int compare(String s1, String s2) |
| { |
| return s1.compareTo(s2); |
| } |
| }; |
| |
| @Setup(Level.Trial) |
| public void setup() throws Throwable |
| { |
| data = seq(btreeSize, cellSize); |
| nonExistData = new ArrayList<>(); |
| btree = BTree.build(data, UpdateFunction.noOp()); |
| for (String d : data) |
| { |
| nonExistData.add(d.substring(0, d.length() - 1) + "!"); |
| } |
| dir = Dir.valueOf(dirParam); |
| |
| } |
| |
| @Benchmark |
| public void searchFound() |
| { |
| BTreeSearchIterator<String, String> iter = getIterator(); |
| String val = iter.next(data.get(targetIdx)); |
| assert(val != null); |
| } |
| |
| private BTreeSearchIterator<String,String> getIterator() |
| { |
| switch (iteratorType) |
| { |
| case "LEAF": |
| return new LeafBTreeSearchIterator<>(btree, CMP, dir); |
| case "TREE": |
| return new FullBTreeSearchIterator<>(btree, CMP, dir); |
| default: |
| throw new IllegalArgumentException("unknown btree iterator type: " + iteratorType); |
| } |
| } |
| |
| @Benchmark |
| public void searchNotFound() |
| { |
| BTreeSearchIterator<String, String> iter = getIterator(); |
| String val = iter.next(nonExistData.get(targetIdx)); |
| assert(val == null); |
| } |
| } |