[136] | 1 | // This file is part of Eigen, a lightweight C++ template library
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| 2 | // for linear algebra.
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| 3 | //
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| 4 | // Copyright (C) 2009 Mark Borgerding mark a borgerding net
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| 5 | //
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| 6 | // This Source Code Form is subject to the terms of the Mozilla
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| 7 | // Public License v. 2.0. If a copy of the MPL was not distributed
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| 8 | // with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
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| 9 |
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| 10 | #include <iostream>
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| 11 |
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| 12 | #include <bench/BenchUtil.h>
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| 13 | #include <complex>
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| 14 | #include <vector>
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| 15 | #include <Eigen/Core>
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| 16 |
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| 17 | #include <unsupported/Eigen/FFT>
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| 18 |
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| 19 | using namespace Eigen;
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| 20 | using namespace std;
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| 21 |
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| 22 |
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| 23 | template <typename T>
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| 24 | string nameof();
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| 25 |
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| 26 | template <> string nameof<float>() {return "float";}
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| 27 | template <> string nameof<double>() {return "double";}
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| 28 | template <> string nameof<long double>() {return "long double";}
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| 29 |
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| 30 | #ifndef TYPE
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| 31 | #define TYPE float
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| 32 | #endif
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| 33 |
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| 34 | #ifndef NFFT
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| 35 | #define NFFT 1024
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| 36 | #endif
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| 37 | #ifndef NDATA
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| 38 | #define NDATA 1000000
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| 39 | #endif
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| 40 |
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| 41 | using namespace Eigen;
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| 42 |
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| 43 | template <typename T>
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| 44 | void bench(int nfft,bool fwd,bool unscaled=false, bool halfspec=false)
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| 45 | {
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| 46 | typedef typename NumTraits<T>::Real Scalar;
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| 47 | typedef typename std::complex<Scalar> Complex;
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| 48 | int nits = NDATA/nfft;
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| 49 | vector<T> inbuf(nfft);
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| 50 | vector<Complex > outbuf(nfft);
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| 51 | FFT< Scalar > fft;
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| 52 |
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| 53 | if (unscaled) {
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| 54 | fft.SetFlag(fft.Unscaled);
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| 55 | cout << "unscaled ";
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| 56 | }
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| 57 | if (halfspec) {
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| 58 | fft.SetFlag(fft.HalfSpectrum);
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| 59 | cout << "halfspec ";
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| 60 | }
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| 61 |
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| 62 |
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| 63 | std::fill(inbuf.begin(),inbuf.end(),0);
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| 64 | fft.fwd( outbuf , inbuf);
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| 65 |
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| 66 | BenchTimer timer;
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| 67 | timer.reset();
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| 68 | for (int k=0;k<8;++k) {
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| 69 | timer.start();
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| 70 | if (fwd)
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| 71 | for(int i = 0; i < nits; i++)
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| 72 | fft.fwd( outbuf , inbuf);
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| 73 | else
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| 74 | for(int i = 0; i < nits; i++)
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| 75 | fft.inv(inbuf,outbuf);
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| 76 | timer.stop();
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| 77 | }
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| 78 |
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| 79 | cout << nameof<Scalar>() << " ";
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| 80 | double mflops = 5.*nfft*log2((double)nfft) / (1e6 * timer.value() / (double)nits );
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| 81 | if ( NumTraits<T>::IsComplex ) {
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| 82 | cout << "complex";
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| 83 | }else{
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| 84 | cout << "real ";
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| 85 | mflops /= 2;
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| 86 | }
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| 87 |
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| 88 |
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| 89 | if (fwd)
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| 90 | cout << " fwd";
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| 91 | else
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| 92 | cout << " inv";
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| 93 |
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| 94 | cout << " NFFT=" << nfft << " " << (double(1e-6*nfft*nits)/timer.value()) << " MS/s " << mflops << "MFLOPS\n";
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| 95 | }
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| 96 |
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| 97 | int main(int argc,char ** argv)
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| 98 | {
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| 99 | bench<complex<float> >(NFFT,true);
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| 100 | bench<complex<float> >(NFFT,false);
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| 101 | bench<float>(NFFT,true);
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| 102 | bench<float>(NFFT,false);
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| 103 | bench<float>(NFFT,false,true);
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| 104 | bench<float>(NFFT,false,true,true);
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| 105 |
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| 106 | bench<complex<double> >(NFFT,true);
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| 107 | bench<complex<double> >(NFFT,false);
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| 108 | bench<double>(NFFT,true);
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| 109 | bench<double>(NFFT,false);
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| 110 | bench<complex<long double> >(NFFT,true);
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| 111 | bench<complex<long double> >(NFFT,false);
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| 112 | bench<long double>(NFFT,true);
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| 113 | bench<long double>(NFFT,false);
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| 114 | return 0;
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| 115 | }
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