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https://github.com/paboyle/Grid.git
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91 lines
3.0 KiB
C++
91 lines
3.0 KiB
C++
#include <Grid.h>
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#include <algorithms/iterative/PrecGeneralisedConjugateResidual.h>
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using namespace std;
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using namespace Grid;
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using namespace Grid::QCD;
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template<class d>
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struct scal {
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d internal;
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};
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Gamma::GammaMatrix Gmu [] = {
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Gamma::GammaX,
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Gamma::GammaY,
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Gamma::GammaZ,
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Gamma::GammaT
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};
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int main (int argc, char ** argv)
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{
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Grid_init(&argc,&argv);
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const int Ls=8;
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GridCartesian * UGrid = SpaceTimeGrid::makeFourDimGrid(GridDefaultLatt(), GridDefaultSimd(Nd,vComplexF::Nsimd()),GridDefaultMpi());
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GridRedBlackCartesian * UrbGrid = SpaceTimeGrid::makeFourDimRedBlackGrid(UGrid);
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GridCartesian * FGrid = SpaceTimeGrid::makeFiveDimGrid(Ls,UGrid);
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GridRedBlackCartesian * FrbGrid = SpaceTimeGrid::makeFiveDimRedBlackGrid(Ls,UGrid);
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std::vector<int> seeds4({1,2,3,4});
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std::vector<int> seeds5({5,6,7,8});
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GridParallelRNG RNG5(FGrid); RNG5.SeedFixedIntegers(seeds5);
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GridParallelRNG RNG4(UGrid); RNG4.SeedFixedIntegers(seeds4);
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LatticeFermion src(FGrid); random(RNG5,src);
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LatticeFermion result(FGrid); result=zero;
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LatticeGaugeField Umu(UGrid);
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SU3::HotConfiguration(RNG4,Umu);
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TrivialPrecon<LatticeFermion> simple;
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PrecGeneralisedConjugateResidual<LatticeFermion> PGCR(1.0e-6,10000,simple,4,160);
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ConjugateResidual<LatticeFermion> CR(1.0e-6,10000);
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ConjugateGradient<LatticeFermion> CG(1.0e-6,10000);
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RealD mass=0.5;
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RealD M5=1.8;
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DomainWallFermion Ddwf(Umu,*FGrid,*FrbGrid,*UGrid,*UrbGrid,mass,M5);
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std::cout<<"*********************************************************"<<std::endl;
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std::cout<<"* Solving with MdagM VPGCR "<<std::endl;
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std::cout<<"*********************************************************"<<std::endl;
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MdagMLinearOperator<DomainWallFermion,LatticeFermion> HermOp(Ddwf);
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result=zero;
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PGCR(HermOp,src,result);
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std::cout<<"*********************************************************"<<std::endl;
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std::cout<<"* Solving with g5-VPGCR "<<std::endl;
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std::cout<<"*********************************************************"<<std::endl;
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Gamma5R5HermitianLinearOperator<DomainWallFermion,LatticeFermion> g5HermOp(Ddwf);
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result=zero;
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PGCR(g5HermOp,src,result);
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std::cout<<"*********************************************************"<<std::endl;
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std::cout<<"* Solving with MdagM-CR "<<std::endl;
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std::cout<<"*********************************************************"<<std::endl;
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result=zero;
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CR(HermOp,src,result);
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std::cout<<"*********************************************************"<<std::endl;
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std::cout<<"* Solving with g5-CR "<<std::endl;
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std::cout<<"*********************************************************"<<std::endl;
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result=zero;
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CR(g5HermOp,src,result);
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std::cout<<"*********************************************************"<<std::endl;
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std::cout<<"* Solving with MdagM-CG "<<std::endl;
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std::cout<<"*********************************************************"<<std::endl;
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result=zero;
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CG(HermOp,src,result);
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Grid_finalize();
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}
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