mirror of https://github.com/gnss-sdr/gnss-sdr
88 lines
2.8 KiB
C++
88 lines
2.8 KiB
C++
/*!
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* \file benchmark_detector.cc
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* \brief Benchmark for preamble detection implementations
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* \author Carles Fernandez-Prades, 2020. cfernandez(at)cttc.es
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*
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*
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* -------------------------------------------------------------------------
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*
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* Copyright (C) 2020 (see AUTHORS file for a list of contributors)
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*
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* GNSS-SDR is a software defined Global Navigation
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* Satellite Systems receiver
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*
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* This file is part of GNSS-SDR.
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*
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* SPDX-License-Identifier: GPL-3.0-or-later
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*
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* -------------------------------------------------------------------------
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*/
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#include "GPS_L1_CA.h"
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#include <benchmark/benchmark.h>
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#include <algorithm>
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#include <array>
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#include <cstdint>
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#include <numeric>
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#include <random>
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#include <vector>
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void bm_forloop(benchmark::State& state)
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{
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int32_t corr_value = 0;
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std::vector<float> d_symbol_history(GPS_CA_PREAMBLE_LENGTH_SYMBOLS, 0.0);
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std::array<int32_t, GPS_CA_PREAMBLE_LENGTH_BITS> d_preamble_samples{};
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// fill the inputs
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std::random_device rd;
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std::default_random_engine e2(rd());
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std::uniform_real_distribution<> dist(-1.0, 1.0);
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std::generate(d_symbol_history.begin(), d_symbol_history.end(), [&dist, &e2]() { return dist(e2); });
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std::generate(d_preamble_samples.begin(), d_preamble_samples.end(), [n = 0]() mutable { return (GPS_CA_PREAMBLE[n++] == '1' ? 1 : -1); });
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while (state.KeepRunning())
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{
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for (int32_t i = 0; i < GPS_CA_PREAMBLE_LENGTH_BITS; i++)
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{
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if (d_symbol_history[i] < 0.0)
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{
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corr_value -= d_preamble_samples[i];
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}
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else
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{
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corr_value += d_preamble_samples[i];
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}
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}
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}
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}
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void bm_lambda(benchmark::State& state)
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{
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int32_t corr_value = 0;
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std::vector<float> d_symbol_history(GPS_CA_PREAMBLE_LENGTH_SYMBOLS, 0.0);
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std::array<int32_t, GPS_CA_PREAMBLE_LENGTH_BITS> d_preamble_samples{};
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// fill the inputs
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std::random_device rd;
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std::default_random_engine e2(rd());
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std::uniform_real_distribution<> dist(-1.0, 1.0);
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std::generate(d_symbol_history.begin(), d_symbol_history.end(), [&dist, &e2]() { return dist(e2); });
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std::generate(d_preamble_samples.begin(), d_preamble_samples.end(), [n = 0]() mutable { return (GPS_CA_PREAMBLE[n++] == '1' ? 1 : -1); });
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while (state.KeepRunning())
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{
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corr_value += std::accumulate(d_symbol_history.begin(),
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d_symbol_history.begin() + GPS_CA_PREAMBLE_LENGTH_BITS,
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0,
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[&d_preamble_samples, n = 0](float a, float b) mutable { return (b > 0.0 ? a + d_preamble_samples[n++] : a - d_preamble_samples[n++]); });
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}
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}
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BENCHMARK(bm_forloop);
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BENCHMARK(bm_lambda);
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BENCHMARK_MAIN();
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