diff options
Diffstat (limited to 'testing/src/main/java/io/perfmark/testing/GeneratorBenchmark.java')
-rw-r--r-- | testing/src/main/java/io/perfmark/testing/GeneratorBenchmark.java | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/testing/src/main/java/io/perfmark/testing/GeneratorBenchmark.java b/testing/src/main/java/io/perfmark/testing/GeneratorBenchmark.java new file mode 100644 index 0000000..fd3eca5 --- /dev/null +++ b/testing/src/main/java/io/perfmark/testing/GeneratorBenchmark.java @@ -0,0 +1,85 @@ +/* + * Copyright 2019 Google LLC + * + * 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 io.perfmark.testing; + +import io.perfmark.impl.Generator; +import java.util.concurrent.TimeUnit; +import org.openjdk.jmh.annotations.Benchmark; +import org.openjdk.jmh.annotations.BenchmarkMode; +import org.openjdk.jmh.annotations.GroupThreads; +import org.openjdk.jmh.annotations.Level; +import org.openjdk.jmh.annotations.Mode; +import org.openjdk.jmh.annotations.OutputTimeUnit; +import org.openjdk.jmh.annotations.Scope; +import org.openjdk.jmh.annotations.Setup; +import org.openjdk.jmh.annotations.State; +import org.openjdk.jmh.infra.Blackhole; + +@State(Scope.Benchmark) +public class GeneratorBenchmark { + + private Generator generator; + + @Setup(Level.Trial) + public void setUp() { + generator = getGenerator(); + generator.setGeneration(Generator.FAILURE); + } + + protected Generator getGenerator() { + throw new UnsupportedOperationException(); + } + + @Benchmark + @BenchmarkMode(Mode.AverageTime) + @OutputTimeUnit(TimeUnit.NANOSECONDS) + public void ifEnabled() { + if (isEnabled(getGeneration())) { + Blackhole.consumeCPU(1000); + } + } + + @Benchmark + @BenchmarkMode(Mode.AverageTime) + @OutputTimeUnit(TimeUnit.NANOSECONDS) + public long getGeneration() { + return generator.getGeneration(); + } + + @Benchmark + @BenchmarkMode(Mode.AverageTime) + @OutputTimeUnit(TimeUnit.NANOSECONDS) + public long getAndSetAndGetGeneration() { + long oldGeneration = generator.getGeneration(); + generator.setGeneration(oldGeneration + 1); + return generator.getGeneration(); + } + + @Benchmark + @BenchmarkMode(Mode.AverageTime) + @OutputTimeUnit(TimeUnit.NANOSECONDS) + @GroupThreads(3) + public long racyGetAndSetAndGetGeneration() { + long oldGeneration = generator.getGeneration(); + generator.setGeneration(oldGeneration + 1); + return generator.getGeneration(); + } + + protected static boolean isEnabled(long gen) { + return ((gen >>> Generator.GEN_OFFSET) & 0x1L) != 0L; + } +} |