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Peter Boyle
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/*************************************************************************************
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Grid physics library, www.github.com/paboyle/Grid
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Source file: ./tests/Test_padded_cell.cc
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Copyright (C) 2023
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Author: Peter Boyle <paboyle@ph.ed.ac.uk>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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See the full license in the file "LICENSE" in the top level distribution directory
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*************************************************************************************/
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/* END LEGAL */
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#include <Grid/Grid.h>
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#include <Grid/lattice/PaddedCell.h>
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#include <Grid/stencil/GeneralLocalStencil.h>
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#include <Grid/algorithms/iterative/PrecGeneralisedConjugateResidual.h>
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#include <Grid/algorithms/iterative/PrecGeneralisedConjugateResidualNonHermitian.h>
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#include <Grid/algorithms/iterative/BiCGSTAB.h>
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#include <Grid/algorithms/multigrid/BatchedBlas.h>
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#include <Grid/algorithms/multigrid/GeneralCoarsenedMatrixMultiRHSnew.h>
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using namespace std;
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using namespace Grid;
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gridblasHandle_t GridBLAS::gridblasHandle;
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int GridBLAS::gridblasInit;
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///////////////////////
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// Tells little dirac op to use MdagM as the .Op()
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///////////////////////
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template<class Field>
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class HermOpAdaptor : public LinearOperatorBase<Field>
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{
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LinearOperatorBase<Field> & wrapped;
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public:
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HermOpAdaptor(LinearOperatorBase<Field> &wrapme) : wrapped(wrapme) {};
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void OpDiag (const Field &in, Field &out) { assert(0); }
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void OpDir (const Field &in, Field &out,int dir,int disp) { assert(0); }
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void OpDirAll (const Field &in, std::vector<Field> &out){ assert(0); };
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void Op (const Field &in, Field &out){
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wrapped.HermOp(in,out);
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}
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void AdjOp (const Field &in, Field &out){
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wrapped.HermOp(in,out);
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}
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void HermOpAndNorm(const Field &in, Field &out,RealD &n1,RealD &n2){ assert(0); }
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void HermOp(const Field &in, Field &out){
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wrapped.HermOp(in,out);
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}
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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=4;
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GridCartesian * UGrid = SpaceTimeGrid::makeFourDimGrid(GridDefaultLatt(),
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GridDefaultSimd(Nd,vComplex::Nsimd()),
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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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// Construct a coarsened grid
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Coordinate clatt = GridDefaultLatt();
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for(int d=0;d<clatt.size();d++){
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clatt[d] = clatt[d]/4;
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}
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GridCartesian *Coarse4d = SpaceTimeGrid::makeFourDimGrid(clatt,
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GridDefaultSimd(Nd,vComplex::Nsimd()),
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GridDefaultMpi());;
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GridCartesian *Coarse5d = SpaceTimeGrid::makeFiveDimGrid(1,Coarse4d);
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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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std::vector<int> cseeds({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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GridParallelRNG CRNG(Coarse5d);CRNG.SeedFixedIntegers(cseeds);
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LatticeFermion src(FGrid); random(RNG5,src);
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LatticeFermion result(FGrid); result=Zero();
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LatticeFermion ref(FGrid); ref=Zero();
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LatticeFermion tmp(FGrid);
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LatticeFermion err(FGrid);
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LatticeGaugeField Umu(UGrid);
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SU<Nc>::HotConfiguration(RNG4,Umu);
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// Umu=Zero();
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RealD mass=0.1;
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RealD M5=1.8;
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DomainWallFermionD Ddwf(Umu,*FGrid,*FrbGrid,*UGrid,*UrbGrid,mass,M5);
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const int nbasis = 16;
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const int cb = 0 ;
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LatticeFermion prom(FGrid);
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std::vector<LatticeFermion> subspace(nbasis,FGrid);
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std::cout<<GridLogMessage<<"Calling Aggregation class" <<std::endl;
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///////////////////////////////////////////////////////////
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// Squared operator is in HermOp
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///////////////////////////////////////////////////////////
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MdagMLinearOperator<DomainWallFermionD,LatticeFermion> HermDefOp(Ddwf);
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///////////////////////////////////////////////////
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// Random aggregation space
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///////////////////////////////////////////////////
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std::cout<<GridLogMessage << "Building random aggregation class"<< std::endl;
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typedef Aggregation<vSpinColourVector,vTComplex,nbasis> Subspace;
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Subspace Aggregates(Coarse5d,FGrid,cb);
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Aggregates.CreateSubspaceRandom(RNG5);
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///////////////////////////////////////////////////
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// Build little dirac op
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///////////////////////////////////////////////////
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std::cout<<GridLogMessage << "Building little Dirac operator"<< std::endl;
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typedef GeneralCoarsenedMatrix<vSpinColourVector,vTComplex,nbasis> LittleDiracOperator;
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typedef LittleDiracOperator::CoarseVector CoarseVector;
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NextToNearestStencilGeometry5D geom(Coarse5d);
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LittleDiracOperator LittleDiracOp(geom,FGrid,Coarse5d);
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LittleDiracOperator LittleDiracOpCol(geom,FGrid,Coarse5d);
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HermOpAdaptor<LatticeFermionD> HOA(HermDefOp);
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LittleDiracOp.CoarsenOperator(HOA,Aggregates);
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///////////////////////////////////////////////////
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// Test the operator
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///////////////////////////////////////////////////
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CoarseVector c_src (Coarse5d);
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CoarseVector c_res (Coarse5d);
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CoarseVector c_res_dag(Coarse5d);
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CoarseVector c_proj(Coarse5d);
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subspace=Aggregates.subspace;
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// random(CRNG,c_src);
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c_src = 1.0;
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blockPromote(c_src,err,subspace);
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prom=Zero();
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for(int b=0;b<nbasis;b++){
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prom=prom+subspace[b];
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}
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err=err-prom;
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std::cout<<GridLogMessage<<"Promoted back from subspace: err "<<norm2(err)<<std::endl;
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std::cout<<GridLogMessage<<"c_src "<<norm2(c_src)<<std::endl;
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std::cout<<GridLogMessage<<"prom "<<norm2(prom)<<std::endl;
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HermDefOp.HermOp(prom,tmp);
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blockProject(c_proj,tmp,subspace);
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std::cout<<GridLogMessage<<" Called Big Dirac Op "<<norm2(tmp)<<std::endl;
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std::cout<<GridLogMessage<<" Calling little Dirac Op "<<std::endl;
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LittleDiracOp.M(c_src,c_res);
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LittleDiracOp.Mdag(c_src,c_res_dag);
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std::cout<<GridLogMessage<<"Little dop : "<<norm2(c_res)<<std::endl;
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std::cout<<GridLogMessage<<"Little dop dag : "<<norm2(c_res_dag)<<std::endl;
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std::cout<<GridLogMessage<<"Big dop in subspace : "<<norm2(c_proj)<<std::endl;
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c_proj = c_proj - c_res;
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std::cout<<GridLogMessage<<" ldop error: "<<norm2(c_proj)<<std::endl;
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c_res_dag = c_res_dag - c_res;
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std::cout<<GridLogMessage<<"Little dopDag - dop: "<<norm2(c_res_dag)<<std::endl;
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std::cout<<GridLogMessage << "Testing Hermiticity stochastically "<< std::endl;
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CoarseVector phi(Coarse5d);
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CoarseVector chi(Coarse5d);
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CoarseVector Aphi(Coarse5d);
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CoarseVector Achi(Coarse5d);
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random(CRNG,phi);
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random(CRNG,chi);
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std::cout<<GridLogMessage<<"Made randoms "<<norm2(phi)<<" " << norm2(chi)<<std::endl;
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LittleDiracOp.M(phi,Aphi);
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LittleDiracOp.Mdag(chi,Achi);
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std::cout<<GridLogMessage<<"Aphi "<<norm2(Aphi)<<" A chi" << norm2(Achi)<<std::endl;
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ComplexD pAc = innerProduct(chi,Aphi);
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ComplexD cAp = innerProduct(phi,Achi);
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ComplexD cAc = innerProduct(chi,Achi);
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ComplexD pAp = innerProduct(phi,Aphi);
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std::cout<<GridLogMessage<< "pAc "<<pAc<<" cAp "<< cAp<< " diff "<<pAc-adj(cAp)<<std::endl;
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std::cout<<GridLogMessage<< "pAp "<<pAp<<" cAc "<< cAc<<"Should be real"<< std::endl;
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std::cout<<GridLogMessage<<"Testing linearity"<<std::endl;
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CoarseVector PhiPlusChi(Coarse5d);
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CoarseVector APhiPlusChi(Coarse5d);
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CoarseVector linerr(Coarse5d);
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PhiPlusChi = phi+chi;
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LittleDiracOp.M(PhiPlusChi,APhiPlusChi);
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linerr= APhiPlusChi-Aphi;
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linerr= linerr-Achi;
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std::cout<<GridLogMessage<<"**Diff "<<norm2(linerr)<<std::endl;
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std::cout<<GridLogMessage<<std::endl;
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std::cout<<GridLogMessage<<std::endl;
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std::cout<<GridLogMessage<<"*******************************************"<<std::endl;
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std::cout<<GridLogMessage<<"*******************************************"<<std::endl;
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std::cout<<GridLogMessage<<"*******************************************"<<std::endl;
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//////////////////////////////////////////////////////////////////////////////////////
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// Create a higher dim coarse grid
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//////////////////////////////////////////////////////////////////////////////////////
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const int nrhs=vComplex::Nsimd()*3;
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Coordinate mpi=GridDefaultMpi();
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Coordinate rhMpi ({1,1,mpi[0],mpi[1],mpi[2],mpi[3]});
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Coordinate rhLatt({nrhs,1,clatt[0],clatt[1],clatt[2],clatt[3]});
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Coordinate rhSimd({vComplex::Nsimd(),1, 1,1,1,1});
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GridCartesian *CoarseMrhs = new GridCartesian(rhLatt,rhSimd,rhMpi);
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MultiGeneralCoarsenedMatrixnew mrhs(LittleDiracOp,CoarseMrhs);
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{
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GridParallelRNG rh_CRNG(CoarseMrhs);rh_CRNG.SeedFixedIntegers(cseeds);
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CoarseVector rh_phi(CoarseMrhs);
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CoarseVector rh_res(CoarseMrhs);
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random(rh_CRNG,rh_phi);
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std::cout << "Warmup"<<std::endl;
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mrhs.M(rh_phi,rh_res);
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const int ncall=5;
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RealD t0=-usecond();
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for(int i=0;i<ncall;i++){
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std::cout << "Call "<<i<<"/"<<ncall<<std::endl;
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mrhs.M(rh_phi,rh_res);
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}
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t0+=usecond();
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RealD t1=0;
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for(int r=0;r<nrhs;r++){
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std::cout << " compare to single RHS "<<r<<"/"<<nrhs<<std::endl;
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ExtractSlice(phi,rh_phi,r,0);
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ExtractSlice(chi,rh_res,r,0);
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LittleDiracOp.M(phi,Aphi);
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t1-=usecond();
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for(int i=0;i<ncall;i++){
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// std::cout << "Call "<<i<<"/"<<ncall<<std::endl;
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LittleDiracOp.M(phi,Aphi);
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}
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t1+=usecond();
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Coordinate site({0,0,0,0,0});
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auto bad = peekSite(chi,site);
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auto good = peekSite(Aphi,site);
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// std::cout << " site 0 srhs "<<good<<std::endl;
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// std::cout << " site 0 mrhs "<<bad<<std::endl;
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std::cout << " mrhs [" <<r <<"] "<< norm2(chi)<<std::endl;
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std::cout << " srhs [" <<r <<"] "<< norm2(Aphi)<<std::endl;
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// std::cout << " srhs field "<<Aphi<<std::endl;
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// std::cout << " mrhs field "<<chi<<std::endl;
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chi=chi-Aphi;
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std::cout << r << " diff " << norm2(chi)<<std::endl;
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}
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std::cout << nrhs<< " mrhs " << t0/ncall/nrhs <<" us"<<std::endl;
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std::cout << nrhs<< " srhs " << t1/ncall/nrhs <<" us"<<std::endl;
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}
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std::cout<<GridLogMessage<<std::endl;
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std::cout<<GridLogMessage<<std::endl;
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std::cout<<GridLogMessage<<"*******************************************"<<std::endl;
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std::cout<<GridLogMessage<<"*******************************************"<<std::endl;
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std::cout<<GridLogMessage<<"*******************************************"<<std::endl;
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Grid_finalize();
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return 0;
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}
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