testBenchmark.cpp File Reference

#include <iostream>
#include <string>
#include <sstream>
#include <benchmark/benchmark.h>

Go to the source code of this file.

Macros
#define	BENCHMARK_NOINLINE

Functions
int BENCHMARK_NOINLINE	Factorial (uint32_t n)
static void	BM_StringCreation (benchmark::State &state)
	BENCHMARK (BM_StringCreation)
static void	BM_StringCopy (benchmark::State &state)
	BENCHMARK (BM_StringCopy)
static void	BM_Factorial (benchmark::State &state)
	BENCHMARK (BM_Factorial)
double	CalculatePi (int depth)
static void	BM_CalculatePiRange (benchmark::State &state)
	BENCHMARK_RANGE (BM_CalculatePiRange, 1, 256 *256)
static void	BM_CalculatePi (benchmark::State &state)
	BENCHMARK (BM_CalculatePi) -> Threads(8)
static void	BM_LongTest (benchmark::State &state)
	BENCHMARK (BM_LongTest) -> Range(1<< 4, 1<< 6)
int	main (int argc, char *argv[])

Detailed Description

This program is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/.

Author

David Coeurjolly (david.nosp@m..coe.nosp@m.urjol.nosp@m.ly@l.nosp@m.iris..nosp@m.cnrs.nosp@m..fr ) Laboratoire d'InfoRmatique en Image et Systemes d'information - LIRIS (CNRS, UMR 5205), CNRS, France

Date

2014/02/26

Functions for testing class Benchmark.

This file is part of the DGtal library.

Definition in file testBenchmark.cpp.

Macro Definition Documentation

BENCHMARK_NOINLINE

#define BENCHMARK_NOINLINE

Definition at line 47 of file testBenchmark.cpp.

Function Documentation

BENCHMARK() [1/5]

BENCHMARK

(

BM_CalculatePi

)

-> Threads(8)

BENCHMARK() [2/5]

BENCHMARK

(

BM_Factorial

)

BENCHMARK() [3/5]

BENCHMARK

(

BM_LongTest

)

-> Range(1<< 4, 1<< 6)

BENCHMARK() [4/5]

BENCHMARK

(

BM_StringCopy

)

BENCHMARK() [5/5]

BENCHMARK

(

BM_StringCreation

)

Referenced by TEST_CASE().

BENCHMARK_RANGE()

BENCHMARK_RANGE	(	BM_CalculatePiRange	,
		1	,
		256 *	256
	)

BM_CalculatePi()

static void BM_CalculatePi ( benchmark::State &  state )

static

Definition at line 105 of file testBenchmark.cpp.

                                                  {
  static const int depth = 256;
  double pi  = 0.0;
  while (state.KeepRunning()) {
    benchmark::DoNotOptimize( pi = CalculatePi(depth) );
  }
}

References CalculatePi().

BM_CalculatePiRange()

static void BM_CalculatePiRange ( benchmark::State &  state )

static

Definition at line 95 of file testBenchmark.cpp.

                                                       {
  double pi = 0.0;
  while (state.KeepRunning())
    pi = CalculatePi(state.range(0));
  std::stringstream ss;
  ss << pi;
  state.SetLabel(ss.str());
}

References CalculatePi().

BM_Factorial()

static void BM_Factorial ( benchmark::State &  state )

static

Definition at line 74 of file testBenchmark.cpp.

                                                {
  int fac_42 = 0;
  while (state.KeepRunning())
    fac_42 = Factorial(8);
  // Prevent compiler optimizations
  std::stringstream ss;
  ss << fac_42;
  state.SetLabel(ss.str());
}

References Factorial().

BM_LongTest()

static void BM_LongTest ( benchmark::State &  state )

static

Definition at line 117 of file testBenchmark.cpp.

                                               {
  double tracker = 0.0;
  while (state.KeepRunning())
    for (int i = 0; i < state.range(0); ++i)
      benchmark::DoNotOptimize(tracker += i);
}

BM_StringCopy()

static void BM_StringCopy ( benchmark::State &  state )

static

Definition at line 65 of file testBenchmark.cpp.

{
  std::string x = "hello";
  while (state.KeepRunning())
    std::string copy(x);
}

BM_StringCreation()

static void BM_StringCreation ( benchmark::State &  state )

static

Definition at line 55 of file testBenchmark.cpp.

{
  while (state.KeepRunning())
    std::string empty_string;
}

CalculatePi()

double CalculatePi

(

int

depth

)

Definition at line 85 of file testBenchmark.cpp.

                              {
  double pi = 0.0;
  for (int i = 0; i < depth; ++i) {
    double numerator = static_cast<double>(((i % 2) * 2) - 1);
    double denominator = static_cast<double>((2 * i) - 1);
    pi += numerator / denominator;
  }
  return (pi - 1.0) * 4;
}

Referenced by BM_CalculatePi(), and BM_CalculatePiRange().

Factorial()

int BENCHMARK_NOINLINE Factorial

(

uint32_t

n

)

Definition at line 51 of file testBenchmark.cpp.

                                             {
  return (n == 1) ? 1 : n * Factorial(n - 1);
}

References Factorial().

Referenced by BM_Factorial(), and Factorial().

main()

int main	(	int	argc,
		char *	argv[]
	)

Definition at line 133 of file testBenchmark.cpp.

{
  benchmark::Initialize(&argc, argv);
 
  benchmark::RunSpecifiedBenchmarks();
  return 0;
}//                                                                           //