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solver_cg_eigen.cc
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Fri, Feb 21, 11:51

solver_cg_eigen.cc
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/**
* file solver_cg_eigen.cc
*
* @author Till Junge <till.junge@epfl.ch>
*
* @date 19 Jan 2018
*
* @brief implementation for binding to Eigen's conjugate gradient solver
*
* @section LICENCE
*
* Copyright (C) 2018 Till Junge
*
* µSpectre 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, or (at
* your option) any later version.
*
* µSpectre 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 GNU Emacs; see the file COPYING. If not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include "solver_cg_eigen.hh"
#include <sstream>
#include <iomanip>
namespace muSpectre {
//----------------------------------------------------------------------------//
template <class SolverType, Dim_t DimS, Dim_t DimM>
SolverEigen<SolverType, DimS, DimM>::SolverEigen(Sys_t& sys, Real tol, Uint maxiter,
bool verbose)
:Parent(sys, tol, maxiter, verbose),
adaptor{sys.get_adaptor()},
solver{}
{}
//----------------------------------------------------------------------------//
template <class SolverType, Dim_t DimS, Dim_t DimM>
void
SolverEigen<SolverType, DimS, DimM>::initialise() {
this->solver.setTolerance(this->tol);
this->solver.setMaxIterations(this->maxiter);
this->solver.compute(this->adaptor);
}
//----------------------------------------------------------------------------//
template <class SolverType, Dim_t DimS, Dim_t DimM>
typename SolverEigen<SolverType, DimS, DimM>::SolvVectorOut
SolverEigen<SolverType, DimS, DimM>::solve(const SolvVectorInC rhs, SolvVectorIn x_0) {
auto & this_solver = static_cast<SolverType&> (*this);
SolvVectorOut retval = this->solver.solveWithGuess(rhs, x_0);
this->counter += this->solver.iterations();
if (this->solver.info() != Eigen::Success) {
std::stringstream err {};
err << this_solver.name() << " has not converged,"
<< " After " << this->solver.iterations() << " steps, the solver "
<< " FAILED with |r|/|b| = "
<< std::setw(15) << this->solver.error()
<< ", cg_tol = " << this->tol << std::endl;
throw ConvergenceError(err.str());
}
if (this->verbose) {
std::cout << " After " << this->solver.iterations() << " "
<< this_solver.name() << " steps, |r|/|b| = "
<< std::setw(15) << this->solver.error()
<< ", cg_tol = " << this->tol << std::endl;
}
return retval;
}
/* ---------------------------------------------------------------------- */
template <class SolverType, Dim_t DimS, Dim_t DimM>
typename SolverEigen<SolverType, DimS, DimM>::Tg_req_t
SolverEigen<SolverType, DimS, DimM>::get_tangent_req() const {
return tangent_requirement;
}
template class SolverEigen<SolverCGEigen<twoD, twoD>, twoD, twoD>;
template class SolverEigen<SolverCGEigen<threeD, threeD>, threeD, threeD>;
template class SolverCGEigen<twoD, twoD>;
template class SolverCGEigen<threeD, threeD>;
template class SolverEigen<SolverGMRESEigen<twoD, twoD>, twoD, twoD>;
template class SolverEigen<SolverGMRESEigen<threeD, threeD>, threeD, threeD>;
template class SolverGMRESEigen<twoD, twoD>;
template class SolverGMRESEigen<threeD, threeD>;
template class SolverEigen<SolverBiCGSTABEigen<twoD, twoD>, twoD, twoD>;
template class SolverEigen<SolverBiCGSTABEigen<threeD, threeD>, threeD, threeD>;
template class SolverBiCGSTABEigen<twoD, twoD>;
template class SolverBiCGSTABEigen<threeD, threeD>;
template class SolverEigen<SolverDGMRESEigen<twoD, twoD>, twoD, twoD>;
template class SolverEigen<SolverDGMRESEigen<threeD, threeD>, threeD, threeD>;
template class SolverDGMRESEigen<twoD, twoD>;
template class SolverDGMRESEigen<threeD, threeD>;
template class SolverEigen<SolverMINRESEigen<twoD, twoD>, twoD, twoD>;
template class SolverEigen<SolverMINRESEigen<threeD, threeD>, threeD, threeD>;
template class SolverMINRESEigen<twoD, twoD>;
template class SolverMINRESEigen<threeD, threeD>;
} // muSpectre

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