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121 lines
4.3 KiB
C++
121 lines
4.3 KiB
C++
/*************************************************************************************
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Grid physics library, www.github.com/paboyle/Grid
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Source file: ./tests/Test_dwf_cg_prec.cc
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Copyright (C) 2015
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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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using namespace std;
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using namespace Grid;
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#if 1
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int main (int argc, char ** argv) {}
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#else
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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=24;
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GridCartesian * UGrid = SpaceTimeGrid::makeFourDimGrid(GridDefaultLatt(), GridDefaultSimd(Nd,vComplexD::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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GridCartesian * UGrid_f = SpaceTimeGrid::makeFourDimGrid(GridDefaultLatt(), GridDefaultSimd(Nd,vComplexF::Nsimd()),GridDefaultMpi());
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GridRedBlackCartesian * UrbGrid_f = SpaceTimeGrid::makeFourDimRedBlackGrid(UGrid_f);
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GridCartesian * FGrid_f = SpaceTimeGrid::makeFiveDimGrid(Ls,UGrid_f);
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GridRedBlackCartesian * FrbGrid_f = SpaceTimeGrid::makeFiveDimRedBlackGrid(Ls,UGrid_f);
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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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LatticeFermionD src(FGrid); random(RNG5,src);
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LatticeFermionD result(FGrid); result=Zero();
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LatticeGaugeFieldD Umu(UGrid);
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LatticeGaugeFieldF Umu_f(UGrid_f);
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SU<Nc>::HotConfiguration(RNG4,Umu);
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precisionChange(Umu_f,Umu);
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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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DomainWallFermionFH Ddwf_f(Umu_f,*FGrid_f,*FrbGrid_f,*UGrid_f,*UrbGrid_f,mass,M5);
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LatticeFermionD src_o(FrbGrid);
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LatticeFermionD result_cg(FrbGrid);
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pickCheckerboard(Odd,src_o,src);
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result_cg.Checkerboard() = Odd;
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result_cg = Zero();
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LatticeFermionD result_mcg(result_cg);
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LatticeFermionD result_rlcg(result_cg);
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SchurDiagMooeeOperator<DomainWallFermionD,LatticeFermionD> HermOpEO(Ddwf);
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SchurDiagMooeeOperator<DomainWallFermionFH,LatticeFermionF> HermOpEO_f(Ddwf_f);
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//#define DO_MIXED_CG
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#define DO_RLUP_CG
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#ifdef DO_MIXED_CG
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std::cout << "Starting mixed CG" << std::endl;
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MixedPrecisionConjugateGradient<LatticeFermionD,LatticeFermionF> mCG(1.0e-8, 10000, 50, FrbGrid_f, HermOpEO_f, HermOpEO);
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mCG.InnerTolerance = 3.0e-5;
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mCG(src_o,result_mcg);
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#endif
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#ifdef DO_RLUP_CG
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std::cout << "Starting reliable update CG" << std::endl;
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ConjugateGradientReliableUpdate<LatticeFermionD,LatticeFermionF> rlCG(1.e-8, 10000, 0.1, FrbGrid_f, HermOpEO_f, HermOpEO);
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rlCG(src_o,result_rlcg);
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#endif
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std::cout << "Starting regular CG" << std::endl;
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ConjugateGradient<LatticeFermionD> CG(1.0e-8,10000);
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CG(HermOpEO,src_o,result_cg);
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#ifdef DO_MIXED_CG
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LatticeFermionD diff_mcg(FrbGrid);
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RealD vdiff_mcg = axpy_norm(diff_mcg, -1.0, result_cg, result_mcg);
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std::cout << "Diff between mixed and regular CG: " << vdiff_mcg << std::endl;
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#endif
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#ifdef DO_RLUP_CG
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LatticeFermionD diff_rlcg(FrbGrid);
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RealD vdiff_rlcg = axpy_norm(diff_rlcg, -1.0, result_cg, result_rlcg);
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std::cout << "Diff between reliable update and regular CG: " << vdiff_rlcg << std::endl;
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#endif
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Grid_finalize();
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}
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#endif
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