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Grid/extras/Hadrons/Modules/MSolver/LocalCoherenceLanczos.hpp

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/*************************************************************************************
Grid physics library, www.github.com/paboyle/Grid
Source file: extras/Hadrons/Modules/MSolver/LocalCoherenceLanczos.hpp
Copyright (C) 2015-2018
Author: Antonin Portelli <antonin.portelli@me.com>
This program 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 2 of the License, or
(at your option) any later version.
This program 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 this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
See the full license in the file "LICENSE" in the top level distribution directory
*************************************************************************************/
/* END LEGAL */
#ifndef Hadrons_MSolver_LocalCoherenceLanczos_hpp_
#define Hadrons_MSolver_LocalCoherenceLanczos_hpp_
#include <Grid/Hadrons/Global.hpp>
#include <Grid/Hadrons/Module.hpp>
#include <Grid/Hadrons/ModuleFactory.hpp>
#include <Grid/Hadrons/LanczosUtils.hpp>
BEGIN_HADRONS_NAMESPACE
/******************************************************************************
* LocalCoherenceLanczos *
******************************************************************************/
BEGIN_MODULE_NAMESPACE(MSolver)
class LocalCoherenceLanczosPar: Serializable
{
public:
GRID_SERIALIZABLE_CLASS_MEMBERS(LocalCoherenceLanczosPar,
std::string, action,
int, doFine,
int, doCoarse,
LanczosParams, fineParams,
LanczosParams, coarseParams,
ChebyParams, smoother,
RealD, coarseRelaxTol,
std::string, blockSize,
std::string, output);
};
template <typename FImpl, int nBasis>
class TLocalCoherenceLanczos: public Module<LocalCoherenceLanczosPar>
{
public:
FERM_TYPE_ALIASES(FImpl,);
typedef LocalCoherenceLanczos<typename FImpl::SiteSpinor,
typename FImpl::SiteComplex,
nBasis> LCL;
typedef FineEigenPack<FImpl> FinePack;
typedef CoarseEigenPack<FImpl, nBasis> CoarsePack;
typedef HADRONS_DEFAULT_SCHUR_OP<FMat, FermionField> SchurFMat;
public:
// constructor
TLocalCoherenceLanczos(const std::string name);
// destructor
virtual ~TLocalCoherenceLanczos(void) = default;
// dependency relation
virtual std::vector<std::string> getInput(void);
virtual std::vector<std::string> getOutput(void);
// setup
virtual void setup(void);
// execution
virtual void execute(void);
private:
void makeCoarseGrid(void);
private:
std::vector<int> coarseDim_;
int Ls_, cLs_{1};
std::unique_ptr<GridCartesian> coarseGrid4_{nullptr};
std::unique_ptr<GridCartesian> coarseGrid_{nullptr};
std::unique_ptr<GridRedBlackCartesian> coarseGrid4Rb_{nullptr};
std::unique_ptr<GridRedBlackCartesian> coarseGridRb_{nullptr};
std::string fineName_, coarseName_;
};
MODULE_REGISTER_NS(LocalCoherenceLanczos,
ARG(TLocalCoherenceLanczos<FIMPL, HADRONS_DEFAULT_LANCZOS_NBASIS>),
MSolver);
MODULE_REGISTER_NS(ZLocalCoherenceLanczos,
ARG(TLocalCoherenceLanczos<ZFIMPL, HADRONS_DEFAULT_LANCZOS_NBASIS>),
MSolver);
/******************************************************************************
* TLocalCoherenceLanczos implementation *
******************************************************************************/
// constructor /////////////////////////////////////////////////////////////////
template <typename FImpl, int nBasis>
TLocalCoherenceLanczos<FImpl, nBasis>::TLocalCoherenceLanczos(const std::string name)
: Module<LocalCoherenceLanczosPar>(name)
{
fineName_ = getName() + "_fine";
coarseName_ = getName() + "_coarse";
}
// dependencies/products ///////////////////////////////////////////////////////
template <typename FImpl, int nBasis>
std::vector<std::string> TLocalCoherenceLanczos<FImpl, nBasis>::getInput(void)
{
std::vector<std::string> in = {par().action};
return in;
}
template <typename FImpl, int nBasis>
std::vector<std::string> TLocalCoherenceLanczos<FImpl, nBasis>::getOutput(void)
{
std::vector<std::string> out = {fineName_, coarseName_};
return out;
}
// setup ///////////////////////////////////////////////////////////////////////
template <typename FImpl, int nBasis>
void TLocalCoherenceLanczos<FImpl, nBasis>::makeCoarseGrid(void)
{
int nd = env().getNd();
std::vector<int> blockSize = strToVec<int>(par().blockSize);
auto fineDim = env().getDim();
Ls_ = env().getObjectLs(par().action);
env().createGrid(Ls_);
coarseDim_.resize(nd);
for (int d = 0; d < coarseDim_.size(); d++)
{
coarseDim_[d] = fineDim[d]/blockSize[d];
if (coarseDim_[d]*blockSize[d] != fineDim[d])
{
HADRON_ERROR(Size, "Fine dimension " + std::to_string(d)
+ " (" + std::to_string(fineDim[d])
+ ") not divisible by coarse dimension ("
+ std::to_string(coarseDim_[d]) + ")");
}
}
if (blockSize.size() > nd)
{
cLs_ = Ls_/blockSize[nd];
if (cLs_*blockSize[nd] != Ls_)
{
HADRON_ERROR(Size, "Fine Ls (" + std::to_string(Ls_)
+ ") not divisible by coarse Ls ("
+ std::to_string(cLs_) + ")");
}
}
if (Ls_ > 1)
{
coarseGrid4_.reset(SpaceTimeGrid::makeFourDimGrid(
coarseDim_, GridDefaultSimd(nd, vComplex::Nsimd()),
GridDefaultMpi()));
coarseGrid4Rb_.reset(SpaceTimeGrid::makeFourDimRedBlackGrid(coarseGrid4_.get()));
coarseGrid_.reset(SpaceTimeGrid::makeFiveDimGrid(cLs_, coarseGrid4_.get()));
coarseGridRb_.reset(SpaceTimeGrid::makeFiveDimRedBlackGrid(cLs_, coarseGrid4_.get()));
}
else
{
coarseGrid_.reset(SpaceTimeGrid::makeFourDimGrid(
coarseDim_, GridDefaultSimd(nd, vComplex::Nsimd()),
GridDefaultMpi()));
coarseGridRb_.reset(SpaceTimeGrid::makeFourDimRedBlackGrid(coarseGrid_.get()));
}
}
template <typename FImpl, int nBasis>
void TLocalCoherenceLanczos<FImpl, nBasis>::setup(void)
{
LOG(Message) << "Setting up local coherence Lanczos eigensolver for"
<< " action '" << par().action << "' (" << nBasis
<< " eigenvectors)..." << std::endl;
if (!coarseGrid_)
{
makeCoarseGrid();
}
envCreate(FinePack, fineName_, Ls_, par().fineParams.Nm, env().getRbGrid(Ls_));
envCreate(CoarsePack, coarseName_, Ls_, par().coarseParams.Nm, coarseGridRb_.get());
auto &fine = envGet(FinePack, fineName_);
auto &coarse = envGet(CoarsePack, coarseName_);
envTmp(SchurFMat, "mat", Ls_, envGet(FMat, par().action));
envGetTmp(SchurFMat, mat);
envTmp(LCL, "solver", Ls_, env().getRbGrid(Ls_), coarseGridRb_.get(), mat,
Odd, fine.evec, coarse.evec, fine.eval, coarse.eval);
}
// execution ///////////////////////////////////////////////////////////////////
template <typename FImpl, int nBasis>
void TLocalCoherenceLanczos<FImpl, nBasis>::execute(void)
{
auto &finePar = par().fineParams;
auto &coarsePar = par().coarseParams;
auto &fine = envGet(FinePack, fineName_);
auto &coarse = envGet(CoarsePack, coarseName_);
envGetTmp(LCL, solver);
if (par().doFine)
{
LOG(Message) << "Performing fine grid IRL -- Nstop= "
<< finePar.Nstop << ", Nk= " << finePar.Nk << ", Nm= "
<< finePar.Nm << std::endl;
solver.calcFine(finePar.Cheby, finePar.Nstop, finePar.Nk, finePar.Nm,
finePar.resid,finePar.MaxIt, finePar.betastp,
finePar.MinRes);
solver.testFine(finePar.resid*100.0);
LOG(Message) << "Orthogonalising" << std::endl;
solver.Orthogonalise();
if (!par().output.empty())
{
fine.write(par().output + "_fine");
}
}
if (par().doCoarse)
{
LOG(Message) << "Performing coarse grid IRL -- Nstop= "
<< coarsePar.Nstop << ", Nk= " << coarsePar.Nk << ", Nm= "
<< coarsePar.Nm << std::endl;
solver.calcCoarse(coarsePar.Cheby, par().smoother, par().coarseRelaxTol,
coarsePar.Nstop, coarsePar.Nk, coarsePar.Nm,
coarsePar.resid, coarsePar.MaxIt, coarsePar.betastp,
coarsePar.MinRes);
if (!par().output.empty())
{
coarse.write(par().output + "_coarse");
}
}
}
END_MODULE_NAMESPACE
END_HADRONS_NAMESPACE
#endif // Hadrons_MSolver_LocalCoherenceLanczos_hpp_
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