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Added Armadillo VS GNU Radio FFT speed test

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Unit test comparing the two FFT implementations
This commit is contained in:
Unknown 2017-10-17 14:17:11 +02:00
parent 9a74120e7c
commit 2c739a26bf
2 changed files with 85 additions and 0 deletions
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src/tests/test_main.cc
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@ -69,6 +69,7 @@ DECLARE_string(log_dir);
#include "unit-tests/arithmetic/multiply_test.cc"
#include "unit-tests/arithmetic/code_generation_test.cc"
#include "unit-tests/arithmetic/fft_length_test.cc"
#include "unit-tests/arithmetic/fft_speed_test.cc"
#include "unit-tests/control-plane/file_configuration_test.cc"
#include "unit-tests/control-plane/in_memory_configuration_test.cc"

84
src/tests/unit-tests/arithmetic/fft_speed_test.cc Normal file
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@ -0,0 +1,84 @@
/*!
* \file fft_speed_test.cc
* \brief This file implements timing tests for the Armadillo
* and GNU Radio FFT implementations
* \author Antonio Ramos, 2017. antonio.ramos(at)cttc.es
*
*
* -------------------------------------------------------------------------
*
* Copyright (C) 2010-2017 (see AUTHORS file for a list of contributors)
*
* GNSS-SDR is a software defined Global Navigation
* Satellite Systems receiver
*
* This file is part of GNSS-SDR.
*
* GNSS-SDR is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* GNSS-SDR 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 GNSS-SDR. If not, see <http://www.gnu.org/licenses/>.
*
* -------------------------------------------------------------------------
*/
#include <chrono>
#include <memory>
#include <gnuradio/fft/fft.h>
#include <armadillo>
DEFINE_int32(fft_speed_iterations_test, 1000, "Number of averaged iterations in FFT length timing test");
TEST(FFTSpeedTest, ArmadilloVSGNURadioExecutionTime)
{
unsigned int d_fft_size;
std::chrono::time_point<std::chrono::system_clock> start, end;
std::chrono::duration<double> elapsed_seconds;
unsigned int fft_sizes [13] = { 16, 32, 64, 128, 256, 512, 1024, 2048, 4096, 8192, 16384, 32768, 65536 };
double d_execution_time;
EXPECT_NO_THROW(
for(int i = 0; i < 13; i++)
{
d_fft_size = fft_sizes[i];
gr::fft::fft_complex* d_gr_fft;
d_gr_fft = new gr::fft::fft_complex(d_fft_size, true);
arma::cx_vec d_arma_fft(d_fft_size);
d_arma_fft = arma::cx_vec(d_fft_size).randn() + gr_complex(0.0, 1.0) * arma::cx_vec(d_fft_size).randn();
memcpy(d_gr_fft->get_inbuf(), d_arma_fft.memptr(), sizeof(gr_complex) * d_fft_size);
start = std::chrono::system_clock::now();
for(int k = 0; k < FLAGS_fft_speed_iterations_test; k++)
{
d_gr_fft->execute();
}
end = std::chrono::system_clock::now();
elapsed_seconds = end - start;
d_execution_time = elapsed_seconds.count() / static_cast<double>(FLAGS_fft_speed_iterations_test);
std::cout << "GNU Radio FFT execution time for length = " << d_fft_size << " : " << d_execution_time << " [s]" << std::endl;
delete d_gr_fft;
start = std::chrono::system_clock::now();
for(int k = 0; k < FLAGS_fft_speed_iterations_test; k++)
{
arma::fft(d_arma_fft);
}
end = std::chrono::system_clock::now();
elapsed_seconds = end - start;
d_execution_time = elapsed_seconds.count() / static_cast<double>(FLAGS_fft_speed_iterations_test);
std::cout << "Armadillo FFT execution time for length = " << d_fft_size << " : " << d_execution_time << " [s]" << std::endl;
}
);
}