build.cpp File Reference
Example programs and code

C++ example based on <rsb.hpp> using timings for common matrix operations on RsbMatrix: RsbMatrix.get_coo(), rsb_coo_sort(), rsb_time(). More...

## Functions

template<typename nt_t >
void | bench (const std::string filename)
auto | main (const int argc, char *argv[]) -> int

## Detailed Description

C++ example based on <rsb.hpp> using timings for common matrix operations on RsbMatrix: RsbMatrix.get_coo(), rsb_coo_sort(), rsb_time().

Author
  Michele Martone

/*
Copyright (C) 2020-2022 Michele Martone
This file is part of librsb.
librsb 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.
librsb 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 Lesser General Public
License for more details.
You should have received a copy of the GNU Lesser General Public
License along with librsb; see the file COPYING.
If not, see <http://www.gnu.org/licenses/>.
*/
/*!
\ingroup rsb_doc_examples
@file
@author Michele Martone
@brief C++ example based on <rsb.hpp> using timings for common matrix operations on RsbMatrix: RsbMatrix.get_coo(), rsb_coo_sort(), rsb_time().
\include build.cpp
*/
#include <complex>
#include <array>
#include <vector>
#include <iomanip>
#include <iostream>
#include <string>
#include <rsb.hpp>
using namespace ::rsb;
template <typename nt_t>
void bench(const std::string filename) {
RsbLib rsblib;
const rsb_trans_t transA = RSB_TRANSPOSITION_N;
const rsb_int_t nt { rsblib.get_num_threads() };
const RsbMatrix<nt_t> mtx(filename.c_str());
std::vector<nt_t> VA(mtx.nnz());
std::vector<rsb_coo_idx_t> IA(mtx.nnz());
std::vector<rsb_coo_idx_t> JA(mtx.nnz());
rsb_time_t dt;
dt = -rsb_time();
const RsbMatrix<nt_t> mtx2{ mtx };
dt += rsb_time();
std::cout << "copy-" << nt << " took " << dt << std::endl;
mtx.get_coo(transA,VA.data(),IA.data(),JA.data(),RSB_FLAG_NOFLAGS);
dt += rsb_time();
std::cout << "get_coo-" << nt << " took " << dt << std::endl;
dt = -rsb_time();
rsb_coo_sort(VA.data(), JA.data(), IA.data(), VA.size(), mtx.cols(), mtx.rows(), mtx.rsbtype(), RSB_FLAG_NOFLAGS);
dt += rsb_time();
std::cout << "rsb_coo_sort-T-" << nt << " took " << dt << std::endl;
dt = -rsb_time();
rsb_coo_sort(VA.data(), IA.data(), JA.data(), VA.size(), mtx.rows(), mtx.cols(), mtx.rsbtype(), RSB_FLAG_NOFLAGS);
dt += rsb_time();
std::cout << "rsb_coo_sort-N-" << nt << " took " << dt << std::endl;
}
auto main(const int argc, char * argv[]) -> int
{
const std::string filename{ argc > 1 ? argv[1] : "../A.mtx"};
#ifdef RSB_NUMERICAL_TYPE_FLOAT
bench<float>(filename);
#endif
#ifdef RSB_NUMERICAL_TYPE_DOUBLE
bench<double>(filename);
#endif
#ifdef RSB_NUMERICAL_TYPE_FLOAT_COMPLEX
bench<std::complex<float>>(filename);
#endif
#ifdef RSB_NUMERICAL_TYPE_DOUBLE_COMPLEX
bench<std::complex<double>>(filename);
#endif
}
main
auto main() -> int
Definition assemble.cpp:38
bench
void bench(const std::string filename, rsb_flags_t order)
Definition autotune.cpp:42
RsbLib
Class initializing/finalizing librsb state.
Definition rsb.hpp:272
RsbLib::get_num_threads
rsb_int_t get_num_threads(void) const
Definition rsb.hpp:360
RsbMatrix
Represent a sparse matrix in RSB format by means of librsb.
Definition rsb.hpp:532
rsb_time
rsb_time_t rsb_time(void)
Definition rsb_rsb.c:1697
rsb_coo_sort
rsb_err_t rsb_coo_sort(void *VA, rsb_coo_idx_t *IA, rsb_coo_idx_t *JA, rsb_nnz_idx_t nnzA, rsb_coo_idx_t nrA, rsb_coo_idx_t ncA, rsb_type_t typecode, rsb_flags_t flagsA)
Definition rsb_rsb.c:702
rsb
Definition rsb.F90:11
RSB_FLAG_NOFLAGS
#define RSB_FLAG_NOFLAGS
Definition rsb.h:478
rsb_trans_t
rsb_flags_t rsb_trans_t
Definition rsb.h:400
rsb_time_t
rsb_real_t rsb_time_t
Definition rsb.h:411
rsb_int_t
signed int rsb_int_t
Definition rsb.h:392
rsb.hpp
Classes RsbLib and RsbMatrix provide native C++ access to librsb.
RSB_TRANSPOSITION_N
#define RSB_TRANSPOSITION_N
N: Non transposed flag, valid for rsb_trans_t typed variables.
Definition rsb_types.h:138

## Function Documentation

## bench()

template<typename nt_t >

void bench | ( | const std::string | filename | ) |

## main()

auto main | ( | const int | argc,
|  | char * | argv[]
| ) |  | -> int