| /* |
| * 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 com.google.common.hash.Hasher; |
| import com.google.common.hash.Hashing; |
| import com.google.common.primitives.Longs; |
| import org.apache.cassandra.utils.ChecksumType; |
| import org.openjdk.jmh.annotations.Benchmark; |
| import org.openjdk.jmh.annotations.BenchmarkMode; |
| import org.openjdk.jmh.annotations.Fork; |
| import org.openjdk.jmh.annotations.Measurement; |
| import org.openjdk.jmh.annotations.Mode; |
| 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; |
| import org.xerial.snappy.PureJavaCrc32C; |
| |
| import java.security.NoSuchAlgorithmException; |
| import java.util.Random; |
| import java.util.concurrent.TimeUnit; |
| |
| @BenchmarkMode(Mode.AverageTime) |
| @OutputTimeUnit(TimeUnit.NANOSECONDS) |
| @Warmup(iterations = 3, time = 1, timeUnit = TimeUnit.SECONDS) |
| @Measurement(iterations = 5, time = 2, timeUnit = TimeUnit.SECONDS) |
| @Threads(4) // make sure this matches the number of _physical_cores_ |
| @State(Scope.Benchmark) |
| public class ChecksumBench |
| { |
| private static final Random random = new Random(12345678); |
| |
| // intentionally not on power-of-2 values |
| @Param({ "31", "131", "517", "2041" }) |
| private int bufferSize; |
| |
| private byte[] array; |
| |
| @Setup |
| public void setup() throws NoSuchAlgorithmException |
| { |
| array = new byte[bufferSize]; |
| random.nextBytes(array); |
| } |
| |
| @Benchmark |
| @Fork(value = 1, jvmArgsAppend = { "-Xmx512M", "-Djmh.executor=CUSTOM", |
| "-Djmh.executor.class=org.apache.cassandra.test.microbench.FastThreadExecutor", |
| }) |
| public byte[] benchCrc32() |
| { |
| return Longs.toByteArray(ChecksumType.CRC32.of(array, 0, array.length)); |
| } |
| |
| @Benchmark |
| @Fork(value = 1, jvmArgsAppend = { "-Xmx512M", "-Djmh.executor=CUSTOM", |
| "-Djmh.executor.class=org.apache.cassandra.test.microbench.FastThreadExecutor", |
| "-XX:+UnlockDiagnosticVMOptions", "-XX:-UseCRC32Intrinsics", |
| }) |
| public byte[] benchCrc32NoIntrinsic() |
| { |
| return Longs.toByteArray(ChecksumType.CRC32.of(array, 0, array.length)); |
| } |
| |
| @Benchmark |
| @Fork(value = 1, jvmArgsAppend = { "-Xmx512M", "-Djmh.executor=CUSTOM", |
| "-Djmh.executor.class=org.apache.cassandra.test.microbench.FastThreadExecutor", |
| }) |
| public byte[] benchHasherCrc32c() |
| { |
| Hasher crc32cHasher = Hashing.crc32c().newHasher(); |
| crc32cHasher.putBytes(array); |
| return crc32cHasher.hash().asBytes(); |
| } |
| |
| @Benchmark |
| @Fork(value = 1, jvmArgsAppend = { "-Xmx512M", "-Djmh.executor=CUSTOM", |
| "-Djmh.executor.class=org.apache.cassandra.test.microbench.FastThreadExecutor", |
| }) |
| public byte[] benchPureJavaCrc32c() |
| { |
| PureJavaCrc32C pureJavaCrc32C = new PureJavaCrc32C(); |
| pureJavaCrc32C.update(array, 0, array.length); |
| return Longs.toByteArray(pureJavaCrc32C.getValue()); |
| } |
| |
| // Below benchmarks are commented because CRC32C is unavailable in Java 8. |
| // @Benchmark |
| // @Fork(value = 1, jvmArgsAppend = { "-Xmx512M", "-Djmh.executor=CUSTOM", |
| // "-Djmh.executor.class=org.apache.cassandra.test.microbench.FastThreadExecutor", |
| // }) |
| // public byte[] benchCrc32c() |
| // { |
| // CRC32C crc32C = new CRC32C(); |
| // crc32C.update(array); |
| // return Longs.toByteArray(crc32C.getValue()); |
| // } |
| // |
| // @Benchmark |
| // @Fork(value = 1, jvmArgsAppend = { "-Xmx512M", "-Djmh.executor=CUSTOM", |
| // "-Djmh.executor.class=org.apache.cassandra.test.microbench.FastThreadExecutor", |
| // "-XX:+UnlockDiagnosticVMOptions", "-XX:-UseCRC32CIntrinsics", |
| // }) |
| // public byte[] benchCrc32cNoIntrinsic() |
| // { |
| // CRC32C crc32C = new CRC32C(); |
| // crc32C.update(array); |
| // return Longs.toByteArray(crc32C.getValue()); |
| // } |
| } |