/*************************************************************************************
Grid physics library, www.github.com/paboyle/Grid
Source file: ./tests/Test_dwf_compressed_lanczos_reorg.cc
Copyright (C) 2017
Author: Leans heavily on Christoph Lehner's code
Author: Peter Boyle <paboyle@ph.ed.ac.uk>
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 */
/*
* Reimplement the badly named "multigrid" lanczos as compressed Lanczos using the features
* in Grid that were intended to be used to support blocked Aggregates, from
*/
#include <Grid/Grid.h>
#include <Grid/algorithms/iterative/ImplicitlyRestartedLanczos.h>
#include <Grid/algorithms/iterative/LocalCoherenceLanczos.h>
using namespace std;
using namespace Grid;
template<class Fobj,class CComplex,int nbasis>
class LocalCoherenceLanczosScidac : public LocalCoherenceLanczos<Fobj,CComplex,nbasis>
{
public:
typedef iVector<CComplex,nbasis > CoarseSiteVector;
typedef Lattice<CoarseSiteVector> CoarseField;
typedef Lattice<CComplex> CoarseScalar; // used for inner products on fine field
typedef Lattice<Fobj> FineField;
LocalCoherenceLanczosScidac(GridBase *FineGrid,GridBase *CoarseGrid,
LinearOperatorBase<FineField> &FineOp,
int checkerboard)
// Base constructor
: LocalCoherenceLanczos<Fobj,CComplex,nbasis>(FineGrid,CoarseGrid,FineOp,checkerboard)
{};
void checkpointFine(std::string evecs_file,std::string evals_file)
{
#ifdef HAVE_LIME
assert(this->subspace.size()==nbasis);
emptyUserRecord record;
Grid::ScidacWriter WR(this->_FineGrid->IsBoss());
WR.open(evecs_file);
for(int k=0;k<nbasis;k++) {
WR.writeScidacFieldRecord(this->subspace[k],record);
}
WR.close();
XmlWriter WRx(evals_file);
write(WRx,"evals",this->evals_fine);
#else
assert(0);
#endif
}
void checkpointFineRestore(std::string evecs_file,std::string evals_file)
{
#ifdef HAVE_LIME
this->evals_fine.resize(nbasis);
this->subspace.resize(nbasis,this->_FineGrid);
std::cout << GridLogIRL<< "checkpointFineRestore: Reading evals from "<<evals_file<<std::endl;
XmlReader RDx(evals_file);
read(RDx,"evals",this->evals_fine);
assert(this->evals_fine.size()==nbasis);
std::cout << GridLogIRL<< "checkpointFineRestore: Reading evecs from "<<evecs_file<<std::endl;
emptyUserRecord record;
Grid::ScidacReader RD ;
RD.open(evecs_file);
for(int k=0;k<nbasis;k++) {
this->subspace[k].checkerboard=this->_checkerboard;
RD.readScidacFieldRecord(this->subspace[k],record);
}
RD.close();
#else
assert(0);
#endif
}
void checkpointCoarse(std::string evecs_file,std::string evals_file)
{
#ifdef HAVE_LIME
int n = this->evec_coarse.size();
emptyUserRecord record;
Grid::ScidacWriter WR(this->_CoarseGrid->IsBoss());
WR.open(evecs_file);
for(int k=0;k<n;k++) {
WR.writeScidacFieldRecord(this->evec_coarse[k],record);
}
WR.close();
XmlWriter WRx(evals_file);
write(WRx,"evals",this->evals_coarse);
#else
assert(0);
#endif
}
void checkpointCoarseRestore(std::string evecs_file,std::string evals_file,int nvec)
{
#ifdef HAVE_LIME
std::cout << "resizing coarse vecs to " << nvec<< std::endl;
this->evals_coarse.resize(nvec);
this->evec_coarse.resize(nvec,this->_CoarseGrid);
std::cout << GridLogIRL<< "checkpointCoarseRestore: Reading evals from "<<evals_file<<std::endl;
XmlReader RDx(evals_file);
read(RDx,"evals",this->evals_coarse);
assert(this->evals_coarse.size()==nvec);
emptyUserRecord record;
std::cout << GridLogIRL<< "checkpointCoarseRestore: Reading evecs from "<<evecs_file<<std::endl;
Grid::ScidacReader RD ;
RD.open(evecs_file);
for(int k=0;k<nvec;k++) {
RD.readScidacFieldRecord(this->evec_coarse[k],record);
}
RD.close();
#else
assert(0);
#endif
}
};
int main (int argc, char ** argv) {
Grid_init(&argc,&argv);
GridLogIRL.TimingMode(1);
LocalCoherenceLanczosParams Params;
{
Params.omega.resize(10);
Params.blockSize.resize(5);
XmlWriter writer("Params_template.xml");
write(writer,"Params",Params);
std::cout << GridLogMessage << " Written Params_template.xml" <<std::endl;
}
{
XmlReader reader(std::string("./Params.xml"));
read(reader, "Params", Params);
}
int Ls = (int)Params.omega.size();
RealD mass = Params.mass;
RealD M5 = Params.M5;
std::vector<int> blockSize = Params.blockSize;
std::vector<int> latt({32,32,32,32});
uint64_t vol = Ls*latt[0]*latt[1]*latt[2]*latt[3];
// double mat_flop= 2.0*1320.0*vol;
// Grids
GridCartesian * UGrid = SpaceTimeGrid::makeFourDimGrid(latt,
GridDefaultSimd(Nd,vComplex::Nsimd()),
GridDefaultMpi());
GridRedBlackCartesian * UrbGrid = SpaceTimeGrid::makeFourDimRedBlackGrid(UGrid);
GridCartesian * FGrid = SpaceTimeGrid::makeFiveDimGrid(Ls,UGrid);
GridRedBlackCartesian * FrbGrid = SpaceTimeGrid::makeFiveDimRedBlackGrid(Ls,UGrid);
std::vector<int> fineLatt = latt;
int dims=fineLatt.size();
assert(blockSize.size()==dims+1);
std::vector<int> coarseLatt(dims);
std::vector<int> coarseLatt5d ;
for (int d=0;d<coarseLatt.size();d++){
coarseLatt[d] = fineLatt[d]/blockSize[d]; assert(coarseLatt[d]*blockSize[d]==fineLatt[d]);
}
std::cout << GridLogMessage<< " 5d coarse lattice is ";
for (int i=0;i<coarseLatt.size();i++){
std::cout << coarseLatt[i]<<"x";
}
int cLs = Ls/blockSize[dims]; assert(cLs*blockSize[dims]==Ls);
std::cout << cLs<<std::endl;
GridCartesian * CoarseGrid4 = SpaceTimeGrid::makeFourDimGrid(coarseLatt, GridDefaultSimd(Nd,vComplex::Nsimd()),GridDefaultMpi());
GridRedBlackCartesian * CoarseGrid4rb = SpaceTimeGrid::makeFourDimRedBlackGrid(CoarseGrid4);
GridCartesian * CoarseGrid5 = SpaceTimeGrid::makeFiveDimGrid(cLs,CoarseGrid4);
// Gauge field
std::vector<int> seeds4({1,2,3,4});
GridParallelRNG RNG4(UGrid); RNG4.SeedFixedIntegers(seeds4);
LatticeGaugeField Umu(UGrid);
SU<Nc>::HotConfiguration(RNG4,Umu);
// FieldMetaData header;
// NerscIO::readConfiguration(Umu,header,Params.config);
std::cout << GridLogMessage << "Lattice dimensions: " << latt << " Ls: " << Ls << std::endl;
// ZMobius EO Operator
ZMobiusFermionD Ddwf(Umu, *FGrid, *FrbGrid, *UGrid, *UrbGrid, mass, M5, Params.omega,1.,0.);
SchurDiagTwoOperator<ZMobiusFermionD,LatticeFermion> HermOp(Ddwf);
// Eigenvector storage
LanczosParams fine =Params.FineParams;
LanczosParams coarse=Params.CoarseParams;
const int Ns1 = fine.Nstop; //const int Ns2 = coarse.Nstop;
const int Nk1 = fine.Nk; //const int Nk2 = coarse.Nk;
const int Nm1 = fine.Nm; const int Nm2 = coarse.Nm;
std::cout << GridLogMessage << "Keep " << fine.Nstop << " fine vectors" << std::endl;
std::cout << GridLogMessage << "Keep " << coarse.Nstop << " coarse vectors" << std::endl;
assert(Nm2 >= Nm1);
const int nbasis= 60;
assert(nbasis==Ns1);
LocalCoherenceLanczosScidac<vSpinColourVector,vTComplex,nbasis> _LocalCoherenceLanczos(FrbGrid,CoarseGrid5,HermOp,Odd);
std::cout << GridLogMessage << "Constructed LocalCoherenceLanczos" << std::endl;
assert( (Params.doFine)||(Params.doFineRead));
if ( Params.doFine ) {
std::cout << GridLogMessage << "Performing fine grid IRL Nstop "<< Ns1 << " Nk "<<Nk1<<" Nm "<<Nm1<< std::endl;
double t0=-usecond();
_LocalCoherenceLanczos.calcFine(fine.Cheby,
fine.Nstop,fine.Nk,fine.Nm,
fine.resid,fine.MaxIt,
fine.betastp,fine.MinRes);
t0+=usecond();
double t1=-usecond();
if ( Params.saveEvecs ) {
std::cout << GridLogIRL<<"Checkpointing Fine evecs"<<std::endl;
_LocalCoherenceLanczos.checkpointFine(std::string("evecs.scidac"),std::string("evals.xml"));
}
t1+=usecond();
std::cout << GridLogMessage << "Computation time is " << (t0)/1.0e6 <<" seconds"<<std::endl;
if ( Params.saveEvecs ) std::cout << GridLogMessage << "I/O time is " << (t1)/1.0e6 <<" seconds"<<std::endl;
std::cout << GridLogMessage << "Time to solution is " << (t1+t0)/1.0e6 <<" seconds"<<std::endl;
std::cout << GridLogMessage << "Done"<<std::endl;
}
Grid_finalize();
}