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/*
 * The Alluxio Open Foundation licenses this work under the Apache License, version 2.0
 * (the "License"). You may not use this work except in compliance with the License, which is
 * available at www.apache.org/licenses/LICENSE-2.0
 *
 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
 * either express or implied, as more fully set forth in the License.
 *
 * See the NOTICE file distributed with this work for information regarding copyright ownership.
 */

package alluxio.fsmaster;

import alluxio.BaseFileStructure;
import alluxio.BaseThreadState;
import alluxio.security.authentication.AuthenticatedClientUser;

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.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;
import org.openjdk.jmh.results.format.ResultFormatType;
import org.openjdk.jmh.runner.Runner;
import org.openjdk.jmh.runner.RunnerException;
import org.openjdk.jmh.runner.options.CommandLineOptionException;
import org.openjdk.jmh.runner.options.CommandLineOptions;
import org.openjdk.jmh.runner.options.Options;
import org.openjdk.jmh.runner.options.OptionsBuilder;

import java.util.concurrent.TimeUnit;

/**
 * Benchmarks for {@link alluxio.master.file.FileSystemMaster}.
 */
@Fork(value = 1, jvmArgsPrepend = "-server")
@Warmup(iterations = 2, time = 3, timeUnit = TimeUnit.SECONDS)
@Measurement(iterations = 6, time = 3, timeUnit = TimeUnit.SECONDS)
@BenchmarkMode(Mode.Throughput)
public class FileSystemMasterBench {

  @State(Scope.Thread)
  public static class ThreadState extends BaseThreadState {
    @Setup(Level.Trial)
    public void setup() {
      AuthenticatedClientUser.set("test");
    }
  }

  @State(Scope.Benchmark)
  public static class FileSystem extends BaseFileStructure {
    @Param({"10"})
    public int mDepth;

    @Param({"0"})
    public int mWidth;

    @Param({"1000"})
    public int mFileCount;

    @Param({"ZIPF"})
    public Distribution mDistribution;
    FileSystemMasterBase mBase = new FileSystemMasterBase();

    @Setup(Level.Trial)
    public void setup() throws Exception {
      super.init(mDepth, mWidth, mFileCount, mDistribution);
      mBase.init();
      mBase.createPathDepths(mDepth);
      for (int d = 0; d < mDepth + 1; d++) {
        for (int i = 0; i < mFileCount; i++) {
          mBase.createFile(d, i);
        }
      }
    }

    @TearDown
    public void tearDown() throws Exception {
      mBase.tearDown();
    }
  }

  @Benchmark
  public void getStatusBench(FileSystem fs, ThreadState ts) {
    int depth = ts.nextDepth(fs);
    fs.mBase.getStatus(depth, ts.nextFileId(fs, depth));
  }

  public static void main(String[] args) throws RunnerException, CommandLineOptionException {
    Options argsCli = new CommandLineOptions(args);
    Options opts = new OptionsBuilder()
        .parent(argsCli)
        .include(FileSystemMasterBench.class.getName())
        .result("results.json")
        .resultFormat(ResultFormatType.JSON)
        .build();
    new Runner(opts).run();
  }
}