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Optimised parameters for 16^3

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This commit is contained in:
Peter Boyle 2023-10-05 16:56:55 -04:00
parent 6532b7f32b
commit 2d710d6bfd
1 changed files with 83 additions and 8 deletions
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89
tests/debug/Test_general_coarse_hdcg.cc
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@ -86,6 +86,12 @@ int main (int argc, char ** argv)
Grid_init(&argc,&argv);
const int Ls=16;
const int nbasis = 40;
const int cb = 0 ;
RealD mass=0.01;
RealD M5=1.8;
RealD b=1.5;
RealD c=0.5;
GridCartesian * UGrid = SpaceTimeGrid::makeFourDimGrid(GridDefaultLatt(),
GridDefaultSimd(Nd,vComplex::Nsimd()),
@ -121,10 +127,6 @@ int main (int argc, char ** argv)
NerscIO::readConfiguration(Umu,header,file);
//////////////////////// Fermion action //////////////////////////////////
RealD mass=0.01;
RealD M5=1.8;
RealD b=1.5;
RealD c=0.5;
MobiusFermionD Ddwf(Umu,*FGrid,*FrbGrid,*UGrid,*UrbGrid,mass,M5,b,c);
SchurDiagMooeeOperator<MobiusFermionD, LatticeFermion> HermOpEO(Ddwf);
@ -143,8 +145,6 @@ int main (int argc, char ** argv)
////////////////////////////////////////////////////////////
///////////// Coarse basis and Little Dirac Operator ///////
////////////////////////////////////////////////////////////
const int nbasis = 40;
const int cb = 0 ;
typedef GeneralCoarsenedMatrix<vSpinColourVector,vTComplex,nbasis> LittleDiracOperator;
typedef LittleDiracOperator::CoarseVector CoarseVector;
@ -154,6 +154,18 @@ int main (int argc, char ** argv)
// Warning: This routine calls PVdagM.Op, not PVdagM.HermOp
typedef Aggregation<vSpinColourVector,vTComplex,nbasis> Subspace;
Subspace Aggregates(Coarse5d,FrbGrid,cb);
#if 1
Aggregates.CreateSubspaceChebyshev(RNG5,HermOpEO,nbasis,
95.0,0.1,
// 400,200,200 -- 48 iters
// 600,200,200 -- 38 iters, 162s
// 600,200,100 -- 38 iters, 169s
// 600,200,50 -- 88 iters. 370s
600,
200,
100,
0.0);
#else
Aggregates.CreateSubspaceChebyshev(RNG5,
HermOpEO,
nbasis,
@ -172,18 +184,21 @@ int main (int argc, char ** argv)
// 0.1, // nbasis 16 -- 142; sloppy solve
0.1, // nbasis 24
300);
#endif
////////////////////////////////////////////////////////////
// Need to check about red-black grid coarsening
////////////////////////////////////////////////////////////
LittleDiracOperator LittleDiracOp(geom,FrbGrid,Coarse5d);
LittleDiracOp.CoarsenOperatorColoured(FineHermOp,Aggregates);
LittleDiracOp.CoarsenOperator(FineHermOp,Aggregates);
// Try projecting to one hop only
std::cout << " projecting coarse matrix "<<std::endl;
LittleDiracOperator LittleDiracOpProj(geom_nn,FrbGrid,Coarse5d);
LittleDiracOpProj.ProjectNearestNeighbour(0.5,LittleDiracOp);
typedef HermitianLinearOperator<LittleDiracOperator,CoarseVector> HermMatrix;
HermMatrix CoarseOp (LittleDiracOp);
HermMatrix CoarseOpProj (LittleDiracOpProj);
//////////////////////////////////////////
// Build a coarse lanczos
@ -200,12 +215,14 @@ int main (int argc, char ** argv)
std::vector<RealD> eval(Nm);
std::vector<CoarseVector> evec(Nm,Coarse5d);
CoarseVector c_src(Coarse5d); c_src=1.0;
CoarseVector c_res(Coarse5d);
PowerMethod<CoarseVector> cPM; cPM(CoarseOp,c_src);
IRL.calc(eval,evec,c_src,Nconv);
DeflatedGuesser<CoarseVector> DeflCoarseGuesser(evec,eval);
//////////////////////////////////////////
// Build a coarse space solver
//////////////////////////////////////////
@ -216,6 +233,52 @@ int main (int argc, char ** argv)
// HPDSolver<CoarseVector> HPDSolve(CoarseOp,CG,CoarseZeroGuesser);
HPDSolver<CoarseVector> HPDSolve(CoarseOp,CG,DeflCoarseGuesser);
c_res=Zero();
HPDSolve(c_src,c_res);
//////////////////////////////////////////////////////////////////////////
// Deflated (with real op EV's) solve for the projected coarse op
// Work towards ADEF1 in the coarse space
//////////////////////////////////////////////////////////////////////////
HPDSolver<CoarseVector> HPDSolveProj(CoarseOpProj,CG,DeflCoarseGuesser);
c_res=Zero();
HPDSolveProj(c_src,c_res);
//////////////////////////////////////////////////////////////////////
// Coarse ADEF1 with deflation space
//////////////////////////////////////////////////////////////////////
// ChebyshevSmoother<CoarseVector,HermMatrix > CoarseSmoother(2.0,40.,8,CoarseOpProj); // 311
ChebyshevSmoother<CoarseVector,HermMatrix > CoarseSmoother(2.0,36.,12,CoarseOpProj); // 311
////////////////////////////////////////////////////////
// CG, Cheby mode spacing 200,200
// Unprojected Coarse CG solve to 1e-8 : 190 iters, 4.9s
// Unprojected Coarse CG solve to 4e-2 : 33 iters, 0.8s
// Projected Coarse CG solve to 1e-8 : 100 iters, 0.36s
////////////////////////////////////////////////////////
// CoarseSmoother(1.0,48.,8,CoarseOpProj); 48 evecs
////////////////////////////////////////////////////////
// ADEF1 Coarse solve to 1e-8 : 44 iters, 2.34s 2.1x gain
// ADEF1 Coarse solve to 4e-2 : 7 iters, 0.4s
// HDCG 38 iters 162s
//
// CoarseSmoother(1.0,40.,8,CoarseOpProj); 48 evecs
// ADEF1 Coarse solve to 1e-8 : 37 iters, 2.0s 2.1x gain
// ADEF1 Coarse solve to 4e-2 : 6 iters, 0.36s
// HDCG 38 iters 169s
TwoLevelADEF1defl<CoarseVector>
cADEF1(1.0e-8, 100,
CoarseOp,
CoarseSmoother,
evec,eval);
c_res=Zero();
cADEF1(c_src,c_res);
cADEF1.Tolerance = 4.0e-2;
c_res=Zero();
cADEF1(c_src,c_res);
//////////////////////////////////////////
// Build a smoother
@ -271,6 +334,18 @@ int main (int argc, char ** argv)
result=Zero();
HDCG(src,result);
TwoLevelADEF2<LatticeFermion,CoarseVector,Subspace>
HDCGdefl(1.0e-8, 3000,
FineHermOp,
Smoother,
cADEF1,
HPDSolve,
Aggregates);
result=Zero();
HDCGdefl(src,result);
}
}