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89 lines
3.0 KiB
C++
89 lines
3.0 KiB
C++
/*******************************************************************************
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Grid physics library, www.github.com/paboyle/Grid
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Source file: programs/Hadrons/SolRBPrecCG.cc
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Copyright (C) 2016
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Author: Antonin Portelli <antonin.portelli@me.com>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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See the full license in the file "LICENSE" in the top level distribution
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directory.
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*******************************************************************************/
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#include <Hadrons/SolRBPrecCG.hpp>
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using namespace Grid;
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using namespace QCD;
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using namespace Hadrons;
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/******************************************************************************
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* SolRBPrecCG implementation *
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******************************************************************************/
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// constructor /////////////////////////////////////////////////////////////////
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SolRBPrecCG::SolRBPrecCG(const std::string name)
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: Module(name)
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{}
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// parse parameters ////////////////////////////////////////////////////////////
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void SolRBPrecCG::parseParameters(XmlReader &reader, const std::string name)
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{
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read(reader, name, par_);
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}
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// dependencies/products ///////////////////////////////////////////////////////
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std::vector<std::string> SolRBPrecCG::getInput(void)
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{
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std::vector<std::string> in = {par_.action};
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return in;
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}
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std::vector<std::string> SolRBPrecCG::getOutput(void)
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{
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std::vector<std::string> out = {getName()};
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return out;
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}
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// setup ///////////////////////////////////////////////////////////////////////
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void SolRBPrecCG::setup(void)
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{
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env().registerObject(getName(), 0);
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env().addOwnership(getName(), par_.action);
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env().setSolverAction(getName(), par_.action);
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}
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// execution ///////////////////////////////////////////////////////////////////
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void SolRBPrecCG::execute(void)
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{
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auto &mat = *(env().getFermionMatrix(par_.action));
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auto solver = [&mat, this](LatticeFermion &sol,
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const LatticeFermion &source)
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{
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ConjugateGradient<LatticeFermion> cg(par_.residual, 10000);
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SchurRedBlackDiagMooeeSolve<LatticeFermion> schurSolver(cg);
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schurSolver(mat, source, sol);
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};
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LOG(Message) << "setting up Schur red-black preconditioned CG for"
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<< " action '" << par_.action << "' with residual "
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<< par_.residual << std::endl;
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env().addSolver(getName(), solver);
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}
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