benchmark.h

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// Copyright 2012 Cloudera Inc.
//
// 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.


#ifndef IMPALA_UTIL_BENCHMARK_H
#define IMPALA_UTIL_BENCHMARK_H

#include <string>
#include <vector>

namespace impala {

class Benchmark {
 public:
  Benchmark(const std::string& name);

  typedef void (*BenchmarkFunction)(int iters, void*);

  int AddBenchmark(const std::string& name, BenchmarkFunction fn, void* args,
      int baseline_idx = 0);

  std::string Measure();

  static std::string GetMachineInfo();

 private:
  friend class BenchmarkTest;

  static double Measure(BenchmarkFunction function, void* args,
      int max_time = 1000, int initial_batch_size = 1000);

  struct BenchmarkResult {
    std::string name;
    BenchmarkFunction fn;
    void* args;
    double rate;
    int baseline_idx;
  };

  std::string name_;
  std::vector<BenchmarkResult> benchmarks_;
};

}

#endif