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Grid/examples/Example_pvdagm.cc
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Peter Boyle 6e8a00f215 Simplest starting point
2026-08-13 16:57:10 -04:00

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/*************************************************************************************
Grid physics library, www.github.com/paboyle/Grid
Source file: ./tests/Test_padded_cell.cc
Copyright (C) 2023
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 */
#include <Grid/Grid.h>
#include <Grid/lattice/PaddedCell.h>
#include <Grid/stencil/GeneralLocalStencil.h>
#include <Grid/algorithms/iterative/PrecGeneralisedConjugateResidual.h>
#include <Grid/algorithms/iterative/PrecGeneralisedConjugateResidualNonHermitian.h>
#include <Grid/algorithms/iterative/BiCGSTAB.h>
using namespace std;
using namespace Grid;
RealD FineSmootherShift = 0.1;
int FineSmootherOrder = 8;
int FineSmootherTol = 0;
//RealD CoarseSmootherShift = 0.1;
//int CoarseSmootherOrder = 8;
//int CoarseSmootherTol = 0;
RealD CoarseSolverShift = 0.002;
RealD CoarseSolverTol = 0.03;
int CoarseSolverOrder = 200;
int CoarseMmax = 20; // coarse GCR restart length (was hardcoded 20)
RealD mass=0.00078;
void ParseEnvironment(void)
{
if(getenv("MASS") ) mass = atof(getenv("MASS"));
if(getenv("FineSmootherShift")) FineSmootherShift = atof(getenv("FineSmootherShift"));
if(getenv("FineSmootherOrder")) FineSmootherOrder = atoi(getenv("FineSmootherOrder"));
if(getenv("CoarseSolverShift")) CoarseSolverShift = atof(getenv("CoarseSolverShift"));
if(getenv("CoarseSolverTol")) CoarseSolverTol = atof(getenv("CoarseSolverTol"));
if(getenv("CoarseSolverOrder")) CoarseSolverOrder = atoi(getenv("CoarseSolverOrder"));
if(getenv("CoarseMmax")) CoarseMmax = atoi(getenv("CoarseMmax"));
if(getenv("DiagInvPrec"))
{
std::cout << GridLogMessage << "WARNING: DiagInvPrec option REMOVED (diagonal-inverse preconditioning wrecks fine->coarse null-vector inheritance); IGNORED" << std::endl;
}
// if(getenv("CoarseSmootherShift")) CoarseSmootherShift = atof(getenv("CoarseSmootherShift"));
// if(getenv("CoarseSmootherOrder")) CoarseSmootherOrder = atoi(getenv("CoarseSmootherOrder"));
std::cout << GridLogMessage << "PARAM: FineSmootherShift "<<FineSmootherShift<<std::endl;
std::cout << GridLogMessage << "PARAM: FineSmootherOrder "<<FineSmootherOrder<<std::endl;
// std::cout << GridLogMessage << "PARAM: CoarseSmootherShift "<<CoarseSmootherShift<<std::endl;
// std::cout << GridLogMessage << "PARAM: CoarseSmootherOrder "<<CoarseSmootherOrder<<std::endl;
std::cout << GridLogMessage << "PARAM: CoarseSolverShift "<<CoarseSolverShift<<std::endl;
std::cout << GridLogMessage << "PARAM: CoarseSolverTol "<<CoarseSolverTol<<std::endl;
std::cout << GridLogMessage << "PARAM: CoarseSolverOrder "<<CoarseSolverOrder<<std::endl;
std::cout << GridLogMessage << "PARAM: CoarseMmax "<<CoarseMmax<<std::endl;
std::cout << GridLogMessage << "PARAM: MASS "<<mass<<std::endl;
}
template <class T> void readFile(T& out, std::string const fname){
#ifdef HAVE_LIME
// Ref: https://github.com/paboyle/Grid/blob/feature/scidac-wp1/tests/debug/Test_general_coarse_hdcg_phys48.cc#L111
std::cout << Grid::GridLogMessage << "Reads at: " << fname << std::endl;
Grid::emptyUserRecord record;
// Grid::ScidacReader SR(out.Grid()->IsBoss());
Grid::ScidacReader SR;
SR.open(fname);
SR.readScidacFieldRecord(out, record);
SR.close();
#endif
}
template <class Field>
void saveSubspace(std::vector<Field> &subspace, std::string const fname){
#ifdef HAVE_LIME
std::cout << Grid::GridLogMessage << "Saving subspace (" << subspace.size() << " vectors) to: " << fname << std::endl;
Grid::emptyUserRecord record;
Grid::ScidacWriter SW(subspace[0].Grid()->IsBoss());
SW.open(fname);
for (int k = 0; k < (int)subspace.size(); k++)
SW.writeScidacFieldRecord(subspace[k], record);
SW.close();
#endif
}
template <class Field>
void loadSubspace(std::vector<Field> &subspace, std::string const fname){
#ifdef HAVE_LIME
std::cout << Grid::GridLogMessage << "Loading subspace (" << subspace.size() << " vectors) from: " << fname << std::endl;
Grid::emptyUserRecord record;
Grid::ScidacReader SR;
SR.open(fname);
for (int k = 0; k < (int)subspace.size(); k++)
SR.readScidacFieldRecord(subspace[k], record);
SR.close();
#endif
}
template<class Matrix,class Field>
class PVdagMLinearOperator : public LinearOperatorBase<Field> {
Matrix &_Mat;
Matrix &_PV;
int nApp;
int nAppDag;
public:
PVdagMLinearOperator(Matrix &Mat,Matrix &PV): _Mat(Mat),_PV(PV), nApp(0), nAppDag(0) {};
void OpDiag (const Field &in, Field &out) { assert(0); }
void OpDir (const Field &in, Field &out,int dir,int disp) { assert(0); }
void OpDirAll (const Field &in, std::vector<Field> &out){ assert(0); };
void Op (const Field &in, Field &out){
// std::cout << GridLogMessage<< "Op: PVdag M "<<std::endl;
Field tmp(in.Grid());
_Mat.M(in,tmp);
_PV.Mdag(tmp,out);
nApp++;
}
void AdjOp (const Field &in, Field &out){
// std::cout << GridLogMessage<<"AdjOp: Mdag PV "<<std::endl;
Field tmp(in.Grid());
_PV.M(in,tmp);
_Mat.Mdag(tmp,out);
nAppDag++;
}
void clear() {
nApp = 0;
nAppDag = 0;
}
void getApplications() {
std::cout << GridLogMessage << "# applications of PVdagM: " << nApp << std::endl;
std::cout << GridLogMessage << "# applications of PVdagM^dag: " << nAppDag << std::endl;
std::cout << GridLogMessage << "# applications total: " << nApp + nAppDag << std::endl;
}
void HermOpAndNorm(const Field &in, Field &out,RealD &n1,RealD &n2){
HermOp(in,out);
ComplexD dot = innerProduct(in,out);
n1=real(dot);
n2=norm2(out);
}
void HermOp(const Field &in, Field &out){
// std::cout <<GridLogMessage<< "HermOp: Mdag PV PVdag M"<<std::endl;
Field tmp(in.Grid());
Op(in,tmp);
AdjOp(tmp,out);
// std::cout << "HermOp done "<<norm2(out)<<std::endl;
}
};
template<class Matrix,class Field>
class MdagPVLinearOperator : public LinearOperatorBase<Field> {
Matrix &_Mat;
Matrix &_PV;
public:
MdagPVLinearOperator(Matrix &Mat,Matrix &PV): _Mat(Mat),_PV(PV){};
void OpDiag (const Field &in, Field &out) { assert(0); }
void OpDir (const Field &in, Field &out,int dir,int disp) { assert(0); }
void OpDirAll (const Field &in, std::vector<Field> &out){ assert(0); };
void Op (const Field &in, Field &out){
Field tmp(in.Grid());
// std::cout <<GridLogMessage<< "Op: PVdag M "<<std::endl;
_PV.M(in,tmp);
_Mat.Mdag(tmp,out);
}
void AdjOp (const Field &in, Field &out){
// std::cout <<GridLogMessage<< "AdjOp: Mdag PV "<<std::endl;
Field tmp(in.Grid());
_Mat.M(in,tmp);
_PV.Mdag(tmp,out);
}
void HermOpAndNorm(const Field &in, Field &out,RealD &n1,RealD &n2){
ComplexD dot = innerProduct(in,out);
n1=real(dot);
n2=norm2(out);
}
void HermOp(const Field &in, Field &out){
// std::cout << GridLogMessage<<"HermOp: PVdag M Mdag PV "<<std::endl;
Field tmp(in.Grid());
Op(in,tmp);
AdjOp(tmp,out);
// std::cout << "HermOp done "<<norm2(out)<<std::endl;
}
};
template<class Matrix,class Field>
class ShiftedPVdagMLinearOperator : public LinearOperatorBase<Field> {
Matrix &_Mat;
Matrix &_PV;
int nApp;
int nAppDag;
public:
RealD shift;
ShiftedPVdagMLinearOperator(RealD _shift,Matrix &Mat,Matrix &PV): shift(_shift),_Mat(Mat),_PV(PV) , nApp(0), nAppDag(0){};
void OpDiag (const Field &in, Field &out) { assert(0); }
void OpDir (const Field &in, Field &out,int dir,int disp) { assert(0); }
void OpDirAll (const Field &in, std::vector<Field> &out){ assert(0); };
void Op (const Field &in, Field &out){
// std::cout << "Op: PVdag M "<<std::endl;
Field tmp(in.Grid());
_Mat.M(in,tmp);
_PV.Mdag(tmp,out);
nApp++;
out = out + shift * in;
}
void AdjOp (const Field &in, Field &out){
// std::cout << "AdjOp: Mdag PV "<<std::endl;
Field tmp(in.Grid());
_PV.M(tmp,out);
_Mat.Mdag(in,tmp);
nAppDag++;
out = out + shift * in;
}
void HermOpAndNorm(const Field &in, Field &out,RealD &n1,RealD &n2){ assert(0); }
void HermOp(const Field &in, Field &out){
// std::cout << "HermOp: Mdag PV PVdag M"<<std::endl;
Field tmp(in.Grid());
Op(in,tmp);
AdjOp(tmp,out);
}
void clear() {
nApp = 0;
nAppDag = 0;
}
void getApplications() {
std::cout << GridLogMessage << "# applications of ShiftedPVdagM: " << nApp << std::endl;
std::cout << GridLogMessage << "# applications of ShiftedPVdagM^dag: " << nAppDag << std::endl;
std::cout << GridLogMessage << "# applications total: " << nApp + nAppDag << std::endl;
}
};
template<class Fobj,class CComplex,int nbasis>
class MGPreconditioner : public LinearFunction< Lattice<Fobj> > {
public:
using LinearFunction<Lattice<Fobj> >::operator();
typedef Aggregation<Fobj,CComplex,nbasis> Aggregates;
typedef typename Aggregation<Fobj,CComplex,nbasis>::FineField FineField;
typedef typename Aggregation<Fobj,CComplex,nbasis>::CoarseVector CoarseVector;
typedef typename Aggregation<Fobj,CComplex,nbasis>::CoarseMatrix CoarseMatrix;
typedef LinearOperatorBase<FineField> FineOperator;
typedef LinearFunction <FineField> FineSmoother;
typedef LinearOperatorBase<CoarseVector> CoarseOperator;
typedef LinearFunction <CoarseVector> CoarseSolver;
Aggregates & _Aggregates;
FineOperator & _FineOperator;
FineSmoother & _PreSmoother;
FineSmoother & _PostSmoother;
CoarseOperator & _CoarseOperator;
CoarseSolver & _CoarseSolve;
std::string name;
int level; void Level(int lv) {level = lv; };
MGPreconditioner(Aggregates &Agg,
FineOperator &Fine,
FineSmoother &PreSmoother,
FineSmoother &PostSmoother,
CoarseOperator &CoarseOperator_,
CoarseSolver &CoarseSolve_,
std::string _name = std::string("unnamed"))
: _Aggregates(Agg),
_FineOperator(Fine),
_PreSmoother(PreSmoother),
_PostSmoother(PostSmoother),
_CoarseOperator(CoarseOperator_),
_CoarseSolve(CoarseSolve_),
name(_name),
level(1) { }
virtual void operator()(const FineField &in, FineField & out)
{
GridBase *CoarseGrid = _Aggregates.CoarseGrid;
// auto CoarseGrid = _CoarseOperator.Grid();
CoarseVector Csrc(CoarseGrid);
CoarseVector Csol(CoarseGrid);
FineField vec1(in.Grid());
FineField vec2(in.Grid());
std::cout<<GridLogMessage << "Calling PreSmoother " <<std::endl;
// std::cout<<GridLogMessage << "Calling PreSmoother input residual "<<norm2(in) <<std::endl;
double t;
// Fine Smoother
// out = in;
out = Zero();
t=-usecond();
_PreSmoother(in,out);
t+=usecond();
std::cout<<GridLogMessage << "PreSmoother took "<< t/1000.0<< "ms" <<std::endl;
// Update the residual
_FineOperator.Op(out,vec1); sub(vec1, in ,vec1);
// std::cout<<GridLogMessage <<"Residual-1 now " <<norm2(vec1)<<std::endl;
// Fine to Coarse
t=-usecond();
_Aggregates.ProjectToSubspace (Csrc,vec1);
t+=usecond();
std::cout<<GridLogMessage << "Project to coarse took "<< t/1000.0<< "ms" <<std::endl;
// Coarse correction
t=-usecond();
Csol = Zero();
_CoarseSolve(Csrc,Csol);
//Csol=Zero();
t+=usecond();
std::cout<<GridLogMessage << "Coarse solve took "<< t/1000.0<< "ms" <<std::endl;
// Coarse to Fine
t=-usecond();
// _CoarseOperator.PromoteFromSubspace(_Aggregates,Csol,vec1);
_Aggregates.PromoteFromSubspace(Csol,vec1);
add(out,out,vec1);
t+=usecond();
std::cout<<GridLogMessage << "Promote to this level took "<< t/1000.0<< "ms" <<std::endl;
// Residual
_FineOperator.Op(out,vec1); sub(vec1 ,in , vec1);
// std::cout<<GridLogMessage <<"Residual-2 now " <<norm2(vec1)<<std::endl;
// Fine Smoother
t=-usecond();
// vec2=vec1;
vec2=Zero();
_PostSmoother(vec1,vec2);
t+=usecond();
std::cout<<GridLogMessage << "PostSmoother took "<< t/1000.0<< "ms" <<std::endl;
add( out,out,vec2);
std::cout<<GridLogMessage << "Done " <<std::endl;
}
};
template<class PVdagM_t, class ShiftedPVdagM_t, class Subspace, class LittleDiracOperator, class CoarseVector, class TwoLevelMG>
void runMG(
GridCartesian *FGrid,
GridCartesian *Coarse5d,
NextToNearestStencilGeometry5D geom,
PVdagM_t PVdagM,
ShiftedPVdagM_t ShiftedPVdagM,
// std::vector<LatticeFermion> subspace
Subspace AggregatesPD
) {
// typedef Aggregation<vSpinColourVector,vTComplex,nbasis> Subspace;
// typedef GeneralCoarsenedMatrix<vSpinColourVector,vTComplex,nbasis> LittleDiracOperator;
// typedef LittleDiracOperator::CoarseVector CoarseVector;
ParseEnvironment();
std::vector<LatticeFermion> subspace = AggregatesPD.subspace;
int nbasis = subspace.size();
const int cb = 0 ;
LatticeFermion err(FGrid);
LatticeFermion prom(FGrid);
LatticeFermion tmp(FGrid);
CoarseVector c_src (Coarse5d);
CoarseVector c_res (Coarse5d);
CoarseVector c_proj(Coarse5d);
Complex one(1.0);
LatticeFermionD f_src(FGrid);
LatticeFermionD f_res(FGrid);
// typedef MGPreconditioner<vSpinColourVector, vTComplex,nbasis> TwoLevelMG;
TrivialPrecon<CoarseVector> simple;
TrivialPrecon<LatticeFermionD> simple_fine;
// Subspace AggregatesPD(Coarse5d,FGrid,cb);
// Orthonormalize subspace and compute nulliness
ShiftedPVdagM.shift = CoarseSolverShift;
int nonherm = 0;
LittleDiracOperator LittleDiracOpPV(geom,FGrid,Coarse5d,nonherm);
LittleDiracOpPV.CoarsenOperator(ShiftedPVdagM, AggregatesPD);
ShiftedPVdagM.shift = FineSmootherShift;
std::cout<<GridLogMessage<<std::endl;
std::cout<<GridLogMessage<<"*******************************************"<<std::endl;
std::cout<<GridLogMessage<<std::endl;
std::cout<<GridLogMessage<<"Testing coarsened operator "<<std::endl;
c_src = one; // 1 in every element for vector 1.
blockPromote(c_src,err,subspace);
prom=Zero();
for(int b=0;b<nbasis;b++){
prom=prom+subspace[b];
}
err=err-prom;
std::cout<<GridLogMessage<<"Promoted back from subspace: err "<<norm2(err)<<std::endl;
std::cout<<GridLogMessage<<"c_src "<<norm2(c_src)<<std::endl;
std::cout<<GridLogMessage<<"prom "<<norm2(prom)<<std::endl;
// PVdagM.Op(prom,tmp);
// blockProject(c_proj,tmp,subspace);
// std::cout<<GridLogMessage<<" Called Big Dirac Op "<<norm2(tmp)<<std::endl;
// LittleDiracOpPV.M(c_src,c_res);
// std::cout<<GridLogMessage<<" Called Little Dirac Op c_src "<< norm2(c_src) << " c_res "<< norm2(c_res) <<std::endl;
// std::cout<<GridLogMessage<<"Little dop : "<<norm2(c_res)<<std::endl;
// // std::cout<<GridLogMessage<<" Little "<< c_res<<std::endl;
// std::cout<<GridLogMessage<<"Big dop in subspace : "<<norm2(c_proj)<<std::endl;
// // std::cout<<GridLogMessage<<" Big "<< c_proj<<std::endl;
// c_proj = c_proj - c_res;
// std::cout<<GridLogMessage<<" ldop error: "<<norm2(c_proj)<<std::endl;
// // std::cout<<GridLogMessage<<" error "<< c_proj<<std::endl;
///////////////////////////////////////
// Coarse grid solver test
///////////////////////////////////////
std::cout<<GridLogMessage<<"******************* "<<std::endl;
std::cout<<GridLogMessage<<" Coarse Grid Solve -- Level 2 "<<std::endl;
std::cout<<GridLogMessage<<"******************* "<<std::endl;
NonHermitianLinearOperator<LittleDiracOperator,CoarseVector> LinOpCoarse(LittleDiracOpPV);
// DiagonalInverse preconditioning REMOVED (library support withdrawn: it
// wrecks the collinearity that makes fine->coarse null-vector inheritance
// free). TrivialPrecon reproduces the former DiagInvPrec=0 path exactly.
PrecGeneralisedConjugateResidualNonHermitian<CoarseVector> L2PGCR(CoarseSolverTol, (CoarseSolverOrder+CoarseMmax-1)/CoarseMmax, LinOpCoarse,simple,CoarseMmax,CoarseMmax);
L2PGCR.SetZeroGuess(1); // callers zero Csol / c_res
L2PGCR.Level(2);
L2PGCR.Name("Couter");
c_res=Zero();
L2PGCR(c_src,c_res);
////////////////////////////////////////
// Fine grid smoother
////////////////////////////////////////
// NonHermitianLinearOperator<PVdagM_t,LatticeFermionD> LinOpSmooth(PVdagM);
// PrecGeneralisedConjugateResidualNonHermitian<LatticeFermionD> SmootherGCR(0.05,1,ShiftedPVdagM,simple_fine,8,8);
// Force 10 iters exactly, no early termination
PrecGeneralisedConjugateResidualNonHermitian<LatticeFermionD> SmootherGCR(FineSmootherTol,1,
ShiftedPVdagM,simple_fine,
FineSmootherOrder,FineSmootherOrder);
SmootherGCR.Level(1);
SmootherGCR.Name("Fsmoother");
SmootherGCR.SetZeroGuess(1); // pre/post slots + direct call all zero their guess
f_src = one; // 1 in every element for vector 1.
f_res=Zero();
SmootherGCR(f_src,f_res);
TwoLevelMG TwoLevelPrecon(AggregatesPD,
PVdagM,
simple_fine,
SmootherGCR,
LinOpCoarse,
L2PGCR,
"PVdagM");
PrecGeneralisedConjugateResidualNonHermitian<LatticeFermion> L1PGCR(1.0e-8,1000,PVdagM,TwoLevelPrecon,32,32);
L1PGCR.SetZeroGuess(1); // f_res=Zero() before the solve
L1PGCR.Level(1);
L1PGCR.Name("Fouter");
std::cout<<GridLogMessage<<"******************* "<<std::endl;
std::cout<<GridLogMessage<<" Running Multi Grid Solver "<<std::endl;
std::cout<<GridLogMessage<<"******************* "<<std::endl;
f_res=Zero();
L1PGCR(f_src,f_res);
std::cout << GridLogMessage << "Fine Grid Smoother -- Level 2 operator uses: " << std::endl;
PVdagM.getApplications();
PVdagM.clear();
ShiftedPVdagM.getApplications();
ShiftedPVdagM.clear();
}
int main (int argc, char ** argv)
{
Grid_init(&argc,&argv);
// TODO read in more parameters: nbasis, GCR iters, smoother order, m
// Might be impossible because nbasis needs to be a constant to be a template parameter
// Usage : $ ./Example_pvdagm <nbasis> <smooth> <outerIters> <m>
// std::string nbasisStr = argv[1];
// std::string smoothStr = argv[2];
// std::string outerStr = argv[3];
// std::string mStr = argv[4];
// int nbasis = std::stoi(nbasisStr);
// int smooth = std::stoi(smoothStr);
const int Ls=24;
RealD M5=1.8;
// const int nbasis = 40;
const int nbasis = 60;
std::cout << GridLogMessage << "Mass: " << mass << ", Ls: " << Ls << ", running Mobius kernel with b=1.5, c=0.5" << std::endl;
std::cout << GridLogMessage << "nbasis: " << nbasis << std::endl;
std::vector<int> lat_size {48, 48, 48, 96};
GridCartesian * UGrid = SpaceTimeGrid::makeFourDimGrid(lat_size, GridDefaultSimd(Nd,vComplex::Nsimd()),GridDefaultMpi());
GridRedBlackCartesian * UrbGrid = SpaceTimeGrid::makeFourDimRedBlackGrid(UGrid);
GridCartesian * FGrid = SpaceTimeGrid::makeFiveDimGrid(Ls,UGrid);
GridRedBlackCartesian * FrbGrid = SpaceTimeGrid::makeFiveDimRedBlackGrid(Ls,UGrid);
// Construct a coarsened grid
// Coordinate clatt = GridDefaultLatt();
Coordinate clatt = lat_size;
Coordinate Block({4,4,4,4});
std::cout << GridLogMessage << "Lattice size: " << lat_size << std::endl;
for(int d=0;d<clatt.size();d++){
clatt[d] = lat_size[d]/Block[d];
}
std::cout << GridLogMessage << "constructing coarse grid" << std::endl;
GridCartesian *Coarse4d = SpaceTimeGrid::makeFourDimGrid(clatt, GridDefaultSimd(Nd,vComplex::Nsimd()),GridDefaultMpi());
GridCartesian *Coarse5d = SpaceTimeGrid::makeFiveDimGrid(1,Coarse4d);
std::vector<int> seeds4({1,2,3,4});
std::vector<int> seeds5({5,6,7,8});
std::vector<int> cseeds({5,6,7,8});
GridParallelRNG RNG5(FGrid); RNG5.SeedFixedIntegers(seeds5);
GridParallelRNG RNG4(UGrid); RNG4.SeedFixedIntegers(seeds4);
GridParallelRNG CRNG(Coarse5d);CRNG.SeedFixedIntegers(cseeds);
LatticeFermion src(FGrid); random(RNG5,src);
LatticeFermion result(FGrid); result=Zero();
LatticeFermion ref(FGrid); ref=Zero();
LatticeFermion tmp(FGrid);
LatticeFermion err(FGrid);
LatticeGaugeField Umu(UGrid);
std::cout << GridLogMessage << "Reading in gauge field" << std::endl;
FieldMetaData header;
// std::string file("/sdcc/u/poare/PETSc-Grid/ckpoint_lat.4000");
std::string file("/ccs/home/poare/ckpoint_lat.1000");
NerscIO::readConfiguration(Umu,header,file);
/*
// DWF, m=0.01
// std::string eigenPath = "/hpcgpfs01/work/lqcd/staging/RBC/ckpoint_lat.4000/ks_evecs/PVdagM_Nm80_Nk40_Niter5000_337342/";
// DWF, m=0.001
// std::string eigenPath = "/hpcgpfs01/work/lqcd/staging/RBC/ckpoint_lat.4000/ks_evecs/PVdagM_Nm80_Nk40_Niter5000_m0p001_339143/";
// Mobius, m=0.001
// std::string eigenPath = "/hpcgpfs01/work/lqcd/staging/RBC/ckpoint_lat.4000/ks_evecs/PVdagM_Nm80_Nk40_Niter5000_346851/";
// Frontier path
std::string eigenPath = "/ccs/home/poare/lqcd/multigrid/spectra/ckpoint_lat.1000/...";
std::cout << GridLogMessage << "Loading eigenvalues" << std::endl;
std::ifstream evalFile(eigenPath + "evals.txt");
std::string str;
std::vector<ComplexD> evals;
while (std::getline(evalFile, str)) {
std::cout << GridLogMessage << "Reading line: " << str << std::endl;
int i1 = str.find("(") + 1;
int i2 = str.find(",") + 1;
int i3 = str.find(")");
std::cout << "i1,i2,i3 = " << i1 << "," << i2 << "," << i3 << std::endl;
std::string reStr = str.substr(i1, i2 - i1);
std::string imStr = str.substr(i2, i3 - i2);
std::cout << GridLogMessage << "Parsed re = " << reStr << " and im = " << imStr << std::endl;
// ComplexD z (std::stof(reStr), std::stof(imStr));
ComplexD z (std::stod(reStr), std::stod(imStr));
evals.push_back(z);
}
std::cout << GridLogMessage << "Eigenvalues: " << evals << std::endl;
int Nevecs = 20;
std::vector<LatticeFermion> evecs;
LatticeFermion evec (FGrid);
for (int i = 0; i < Nevecs; i++) {
std::string evecPath = eigenPath + "evec" + std::to_string(i);
readFile(evec, evecPath);
evecs.push_back(evec);
}
std::cout << GridLogMessage << "Evecs loaded" << std::endl;
*/
// TODO uncomment when evecs are computed!
// DomainWallFermionD Ddwf(Umu,*FGrid,*FrbGrid,*UGrid,*UrbGrid,mass,M5);
// DomainWallFermionD Dpv(Umu,*FGrid,*FrbGrid,*UGrid,*UrbGrid,1.0,M5);
// Mobius
RealD b=1.5;// Scale factor b+c=2, b-c=1
RealD c=0.5;
MobiusFermionD Ddwf(Umu,*FGrid,*FrbGrid,*UGrid,*UrbGrid,mass,M5,b,c);
MobiusFermionD Dpv(Umu,*FGrid,*FrbGrid,*UGrid,*UrbGrid,1.0,M5,b,c);
const int cb = 0 ;
LatticeFermion prom(FGrid);
// assert(nbasis <= Nevecs); // need to have enough evecs
typedef GeneralCoarsenedMatrix<vSpinColourVector,vTComplex,nbasis> LittleDiracOperator;
typedef LittleDiracOperator::CoarseVector CoarseVector;
NextToNearestStencilGeometry5D geom(Coarse5d);
std::cout<<GridLogMessage<<std::endl;
std::cout<<GridLogMessage<<"*******************************************"<<std::endl;
std::cout<<GridLogMessage<<std::endl;
// typedef PVdagMLinearOperator<DomainWallFermionD,LatticeFermionD> PVdagM_t;
// typedef MdagPVLinearOperator<DomainWallFermionD,LatticeFermionD> MdagPV_t;
// typedef ShiftedPVdagMLinearOperator<DomainWallFermionD,LatticeFermionD> ShiftedPVdagM_t;
typedef PVdagMLinearOperator<MobiusFermionD,LatticeFermionD> PVdagM_t;
typedef MdagPVLinearOperator<MobiusFermionD,LatticeFermionD> MdagPV_t;
typedef ShiftedPVdagMLinearOperator<MobiusFermionD,LatticeFermionD> ShiftedPVdagM_t;
PVdagM_t PVdagM(Ddwf,Dpv);
MdagPV_t MdagPV(Ddwf,Dpv);
// ShiftedPVdagM_t ShiftedPVdagM(2.0,Ddwf,Dpv); // 355
// ShiftedPVdagM_t ShiftedPVdagM(1.0,Ddwf,Dpv); // 246
// ShiftedPVdagM_t ShiftedPVdagM(0.5,Ddwf,Dpv); // 183
// ShiftedPVdagM_t ShiftedPVdagM(0.25,Ddwf,Dpv); // 145
// ShiftedPVdagM_t ShiftedPVdagM(0.1,Ddwf,Dpv); // 134
// ShiftedPVdagM_t ShiftedPVdagM(0.1,Ddwf,Dpv); // 127 -- NULL space via inverse iteration
// ShiftedPVdagM_t ShiftedPVdagM(0.1,Ddwf,Dpv); // 57 -- NULL space via inverse iteration; 3 iterations
// ShiftedPVdagM_t ShiftedPVdagM(0.25,Ddwf,Dpv); // 57 , tighter inversion
// ShiftedPVdagM_t ShiftedPVdagM(0.25,Ddwf,Dpv); // nbasis 20 -- 49 iters
// ShiftedPVdagM_t ShiftedPVdagM(0.25,Ddwf,Dpv); // nbasis 20 -- 70 iters; asymmetric
// ShiftedPVdagM_t ShiftedPVdagM(0.25,Ddwf,Dpv); // 58; Loosen coarse, tighten fine
// ShiftedPVdagM_t ShiftedPVdagM(0.1,Ddwf,Dpv); // 56 ...
// ShiftedPVdagM_t ShiftedPVdagM(0.1,Ddwf,Dpv); // 51 ... with 24 vecs
// ShiftedPVdagM_t ShiftedPVdagM(0.1,Ddwf,Dpv); // 31 ... with 24 vecs and 2^4 blocking
// ShiftedPVdagM_t ShiftedPVdagM(0.1,Ddwf,Dpv); // 43 ... with 16 vecs and 2^4 blocking, sloppier
// ShiftedPVdagM_t ShiftedPVdagM(0.1,Ddwf,Dpv); // 35 ... with 20 vecs and 2^4 blocking
// ShiftedPVdagM_t ShiftedPVdagM(0.1,Ddwf,Dpv); // 35 ... with 20 vecs and 2^4 blocking, looser coarse
// ShiftedPVdagM_t ShiftedPVdagM(0.1,Ddwf,Dpv); // 64 ... with 20 vecs, Christoph setup, and 2^4 blocking, looser coarse
ShiftedPVdagM_t ShiftedPVdagM(FineSmootherShift,Ddwf,Dpv); //
// Run power method on HOA??
PowerMethod<LatticeFermion> PM;
CoarseVector c_src (Coarse5d);
CoarseVector c_res (Coarse5d);
CoarseVector c_proj(Coarse5d);
Complex one(1.0);
std::vector<LatticeFermion> subspace(nbasis,FGrid);
LatticeFermionD f_src(FGrid);
LatticeFermionD f_res(FGrid);
typedef MGPreconditioner<vSpinColourVector, vTComplex,nbasis> TwoLevelMG;
TrivialPrecon<CoarseVector> simple;
TrivialPrecon<LatticeFermionD> simple_fine;
// Warning: This routine calls PVdagM.Op, not PVdagM.HermOp
typedef Aggregation<vSpinColourVector,vTComplex,nbasis> Subspace;
// Breeds right singular vectors with call to HermOp (V)
// int chebyOrd = 500;
// V.CreateSubspaceChebyshev(RNG5,PVdagM,
// nbasis,
// 4000.0,0.003,
// chebyOrd);
// AggregatesPD.CreateSubspaceChebyshev(RNG5,
// PVdagM,
// nbasis,
// 4000.0,
// 0.003,
// chebyOrd);
// Subspace testing (uncomment blocks when needed)
// - nbasis = 20, m=0.01, 35 outer iterations
// - nbasis = 40, m=0.01, 23 outer iterations
std::cout << GridLogMessage << "*** GCR setup ***" << std::endl;
// Subspace cache: save after generation, reload on subsequent runs to skip expensive setup.
// Set SUBSPACE_FILE to override the default path.
std::string subspace_file = "/lustre/orion/phy157/proj-shared/phy157_dwf/paboyle/subspace_nb"
+ std::to_string(nbasis) + ".scidac";
if ( getenv("SUBSPACE_FILE") ) subspace_file = std::string(getenv("SUBSPACE_FILE"));
// Check if subspace file exists (boss rank checks, result broadcast via GlobalSum).
uint64_t file_exists = 0;
if ( UGrid->IsBoss() ) {
std::ifstream f(subspace_file);
file_exists = f.good() ? 1 : 0;
}
UGrid->GlobalSum(file_exists);
Subspace AggregatesGCR(Coarse5d,FGrid,cb);
if ( file_exists ) {
std::cout << GridLogMessage << "*** Loading subspace from disk ***" << std::endl;
loadSubspace(AggregatesGCR.subspace, subspace_file);
// Insurance: GLOBAL (whole-lattice) orthonormalise, matching what
// CreateSubspaceGCR applies to generated subspaces (Aggregates.h:196), so a
// reloaded file ends in the same state. This replaces the block
// Orthogonalise() previously called here -- that is redundant (CoarsenOperator
// block-GS's the subspace internally) and would leave a loaded file block-
// orthonormal while a generated one is globally orthonormal. Global GS is
// span-preserving, so the coarse operator is unchanged.
AggregatesGCR.GlobalOrthonormalise();
std::cout << GridLogMessage << "Subspace loaded and globally orthonormalised." << std::endl;
} else {
std::cout << GridLogMessage << "*** GCR subspace generation ***" << std::endl;
AggregatesGCR.CreateSubspaceGCR(RNG5,PVdagM,nbasis);
std::cout << GridLogMessage << "Subspace generation: PVdagM operator uses:" << std::endl;
PVdagM.getApplications();
PVdagM.clear();
saveSubspace(AggregatesGCR.subspace, subspace_file);
std::cout << GridLogMessage << "Subspace saved to: " << subspace_file << std::endl;
}
std::cout << GridLogMessage << "Basis construction operator uses: " << std::endl;
PVdagM.getApplications();
PVdagM.clear();
std::cout << GridLogMessage << "Calling runMG " << std::endl;
runMG<PVdagM_t, ShiftedPVdagM_t, Subspace, LittleDiracOperator, CoarseVector, TwoLevelMG>(
FGrid,
Coarse5d,
geom,
PVdagM,
ShiftedPVdagM,
AggregatesGCR
);
//////////////////////////////////
// Standard CG
//////////////////////////////////
#if 0
{
std::cout << "**************************************"<<std::endl;
std::cout << "Calling red black CG"<<std::endl;
std::cout << "**************************************"<<std::endl;
ConjugateGradient<LatticeFermionD> CGfine(1.0e-8,30000,false);
SchurDiagMooeeOperator<MobiusFermionD, LatticeFermion> HermOpEO(Ddwf);
LatticeFermion result(FrbGrid); result=Zero();
LatticeFermion src(FrbGrid); random(RNG5,src);
result=Zero();
CGfine(HermOpEO, src, result);
}
{
std::cout << "**************************************"<<std::endl;
std::cout << "Calling MdagM CG"<<std::endl;
std::cout << "**************************************"<<std::endl;
LatticeFermion result(FGrid); result=Zero();
LatticeFermion src(FGrid); random(RNG5,src);
result=Zero();
MdagMLinearOperator<MobiusFermionD, LatticeFermionD> HermOp(Ddwf);
ConjugateGradient<LatticeFermionD> CGfine(1.0e-8,100000,false);
CGfine(HermOp, src, result);
}
{
std::cout << "**************************************"<<std::endl;
std::cout << "Calling PVdagM GCR"<<std::endl;
std::cout << "**************************************"<<std::endl;
LatticeFermion result(FGrid); result=Zero();
LatticeFermion src(FGrid); random(RNG5,src);
result=Zero();
PrecGeneralisedConjugateResidualNonHermitian<LatticeFermionD> GCR(1.0e-8,3000,PVdagM,simple_fine,50,50);
GCR.Name("Fbaseline");
GCR.SetZeroGuess(1); // result=Zero() above
GCR(src,result);
}
#endif
std::cout<<GridLogMessage<<std::endl;
std::cout<<GridLogMessage << "Done "<< std::endl;
Grid_finalize();
return 0;
}
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