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Variable preconditioned GCR with restarting.

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Orthogonalisation depth and restart frequency is controllable via constructor
This commit is contained in:
Azusa Yamaguchi
2015-06-21 10:58:46 +01:00
parent c7d77dfa0f
commit 3b4118f33e
9 changed files with 222 additions and 72 deletions
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90
tests/Test_dwf_fpgcr.cc Normal file
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#include <Grid.h>
#include <algorithms/iterative/PrecGeneralisedConjugateResidual.h>
using namespace std;
using namespace Grid;
using namespace Grid::QCD;
template<class d>
struct scal {
d internal;
};
Gamma::GammaMatrix Gmu [] = {
Gamma::GammaX,
Gamma::GammaY,
Gamma::GammaZ,
Gamma::GammaT
};
int main (int argc, char ** argv)
{
Grid_init(&argc,&argv);
const int Ls=8;
GridCartesian * UGrid = SpaceTimeGrid::makeFourDimGrid(GridDefaultLatt(), GridDefaultSimd(Nd,vComplexF::Nsimd()),GridDefaultMpi());
GridRedBlackCartesian * UrbGrid = SpaceTimeGrid::makeFourDimRedBlackGrid(UGrid);
GridCartesian * FGrid = SpaceTimeGrid::makeFiveDimGrid(Ls,UGrid);
GridRedBlackCartesian * FrbGrid = SpaceTimeGrid::makeFiveDimRedBlackGrid(Ls,UGrid);
std::vector<int> seeds4({1,2,3,4});
std::vector<int> seeds5({5,6,7,8});
GridParallelRNG RNG5(FGrid); RNG5.SeedFixedIntegers(seeds5);
GridParallelRNG RNG4(UGrid); RNG4.SeedFixedIntegers(seeds4);
LatticeFermion src(FGrid); random(RNG5,src);
LatticeFermion result(FGrid); result=zero;
LatticeGaugeField Umu(UGrid);
SU3::HotConfiguration(RNG4,Umu);
TrivialPrecon<LatticeFermion> simple;
PrecGeneralisedConjugateResidual<LatticeFermion> PGCR(1.0e-6,10000,simple,4,160);
ConjugateResidual<LatticeFermion> CR(1.0e-6,10000);
ConjugateGradient<LatticeFermion> CG(1.0e-6,10000);
RealD mass=0.5;
RealD M5=1.8;
DomainWallFermion Ddwf(Umu,*FGrid,*FrbGrid,*UGrid,*UrbGrid,mass,M5);
std::cout<<"*********************************************************"<<std::endl;
std::cout<<"* Solving with MdagM VPGCR "<<std::endl;
std::cout<<"*********************************************************"<<std::endl;
MdagMLinearOperator<DomainWallFermion,LatticeFermion> HermOp(Ddwf);
result=zero;
PGCR(HermOp,src,result);
std::cout<<"*********************************************************"<<std::endl;
std::cout<<"* Solving with g5-VPGCR "<<std::endl;
std::cout<<"*********************************************************"<<std::endl;
Gamma5R5HermitianLinearOperator<DomainWallFermion,LatticeFermion> g5HermOp(Ddwf);
result=zero;
PGCR(g5HermOp,src,result);
std::cout<<"*********************************************************"<<std::endl;
std::cout<<"* Solving with MdagM-CR "<<std::endl;
std::cout<<"*********************************************************"<<std::endl;
result=zero;
CR(HermOp,src,result);
std::cout<<"*********************************************************"<<std::endl;
std::cout<<"* Solving with g5-CR "<<std::endl;
std::cout<<"*********************************************************"<<std::endl;
result=zero;
CR(g5HermOp,src,result);
std::cout<<"*********************************************************"<<std::endl;
std::cout<<"* Solving with MdagM-CG "<<std::endl;
std::cout<<"*********************************************************"<<std::endl;
result=zero;
CG(HermOp,src,result);
Grid_finalize();
}