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133 lines
4.2 KiB
C++
133 lines
4.2 KiB
C++
/*************************************************************************************
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Grid physics library, www.github.com/paboyle/Grid
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Source file: extras/Hadrons/Modules/MSolver/RBPrecCG.hpp
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Copyright (C) 2015
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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 directory
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*************************************************************************************/
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/* END LEGAL */
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#ifndef Hadrons_MSolver_RBPrecCG_hpp_
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#define Hadrons_MSolver_RBPrecCG_hpp_
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#include <Grid/Hadrons/Global.hpp>
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#include <Grid/Hadrons/Module.hpp>
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#include <Grid/Hadrons/ModuleFactory.hpp>
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BEGIN_HADRONS_NAMESPACE
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/******************************************************************************
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* Schur red-black preconditioned CG *
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******************************************************************************/
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BEGIN_MODULE_NAMESPACE(MSolver)
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class RBPrecCGPar: Serializable
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{
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public:
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GRID_SERIALIZABLE_CLASS_MEMBERS(RBPrecCGPar,
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std::string, action,
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double , residual);
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};
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template <typename FImpl>
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class TRBPrecCG: public Module<RBPrecCGPar>
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{
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public:
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FGS_TYPE_ALIASES(FImpl,);
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public:
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// constructor
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TRBPrecCG(const std::string name);
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// destructor
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virtual ~TRBPrecCG(void) = default;
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// dependencies/products
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virtual std::vector<std::string> getInput(void);
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virtual std::vector<std::string> getOutput(void);
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// setup
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virtual void setup(void);
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// execution
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virtual void execute(void);
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};
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MODULE_REGISTER_NS(RBPrecCG, TRBPrecCG<FIMPL>, MSolver);
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/******************************************************************************
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* TRBPrecCG template implementation *
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******************************************************************************/
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// constructor /////////////////////////////////////////////////////////////////
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template <typename FImpl>
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TRBPrecCG<FImpl>::TRBPrecCG(const std::string name)
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: Module(name)
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{}
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// dependencies/products ///////////////////////////////////////////////////////
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template <typename FImpl>
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std::vector<std::string> TRBPrecCG<FImpl>::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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template <typename FImpl>
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std::vector<std::string> TRBPrecCG<FImpl>::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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template <typename FImpl>
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void TRBPrecCG<FImpl>::setup(void)
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{
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auto Ls = env().getObjectLs(par().action);
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env().registerObject(getName(), 0, Ls);
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env().addOwnership(getName(), par().action);
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}
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// execution ///////////////////////////////////////////////////////////////////
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template <typename FImpl>
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void TRBPrecCG<FImpl>::execute(void)
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{
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auto &mat = *(env().template getObject<FMat>(par().action));
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auto solver = [&mat, this](FermionField &sol, const FermionField &source)
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{
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ConjugateGradient<FermionField> cg(par().residual, 10000);
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SchurRedBlackDiagMooeeSolve<FermionField> 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().setObject(getName(), new SolverFn(solver));
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}
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END_MODULE_NAMESPACE
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END_HADRONS_NAMESPACE
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#endif // Hadrons_MSolver_RBPrecCG_hpp_
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