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127 lines
4.7 KiB
C++
127 lines
4.7 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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;
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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::Algebra Gmu [] = {
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Gamma::Algebra::GammaX,
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Gamma::Algebra::GammaY,
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Gamma::Algebra::GammaZ,
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Gamma::Algebra::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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std::cout << GridLogMessage << "::::: NB: to enable a quick bit reproducibility check use the --checksums flag. " << std::endl;
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GridCartesian *FGrid_d = SpaceTimeGrid::makeFourDimGrid(GridDefaultLatt(), GridDefaultSimd(Nd, vComplexD::Nsimd()), GridDefaultMpi());
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GridCartesian *FGrid_f = SpaceTimeGrid::makeFourDimGrid(GridDefaultLatt(), GridDefaultSimd(Nd, vComplexF::Nsimd()), GridDefaultMpi());
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GridRedBlackCartesian *FrbGrid_d = SpaceTimeGrid::makeFourDimRedBlackGrid(FGrid_d);
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GridRedBlackCartesian *FrbGrid_f = SpaceTimeGrid::makeFourDimRedBlackGrid(FGrid_f);
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std::vector<int> fSeeds({1, 2, 3, 4});
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GridParallelRNG fPRNG(FGrid_d);
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fPRNG.SeedFixedIntegers(fSeeds);
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// clang-format off
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LatticeFermionD src(FGrid_d); gaussian(fPRNG, src);
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LatticeFermionD result(FGrid_d); result = Zero();
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LatticeGaugeFieldD Umu_d(FGrid_d); SU<Nc>::HotConfiguration(fPRNG, Umu_d);
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LatticeGaugeFieldF Umu_f(FGrid_f); precisionChange(Umu_f, Umu_d);
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// clang-format on
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RealD mass = -0.1;
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RealD csw_r = 1.0;
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RealD csw_t = 1.0;
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WilsonCloverFermionD Dw_d(Umu_d, *FGrid_d, *FrbGrid_d, mass, csw_r, csw_t);
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WilsonCloverFermionF Dw_f(Umu_f, *FGrid_f, *FrbGrid_f, mass, csw_r, csw_t);
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LatticeFermionD src_o(FrbGrid_d);
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LatticeFermionD result_o(FrbGrid_d);
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LatticeFermionD result_o_2(FrbGrid_d);
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pickCheckerboard(Odd, src_o, src);
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result_o.Checkerboard() = Odd;
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result_o = Zero();
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result_o_2.Checkerboard() = Odd;
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result_o_2 = Zero();
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NonHermitianSchurDiagMooeeOperator<WilsonCloverFermionD, LatticeFermionD> NonHermOpEO_d(Dw_d);
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NonHermitianSchurDiagMooeeOperator<WilsonCloverFermionF, LatticeFermionF> NonHermOpEO_f(Dw_f);
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std::cout << GridLogMessage << "::::::::::::: Starting mixed CG" << std::endl;
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MixedPrecisionBiCGSTAB<LatticeFermionD, LatticeFermionF> mCG(1.0e-8, 10000, 50, FrbGrid_f, NonHermOpEO_f, NonHermOpEO_d);
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mCG(src_o, result_o);
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std::cout << GridLogMessage << "::::::::::::: Starting regular CG" << std::endl;
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BiCGSTAB<LatticeFermionD> CG(1.0e-8, 10000);
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CG(NonHermOpEO_d, src_o, result_o_2);
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LatticeFermionD diff_o(FrbGrid_d);
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RealD diff = axpy_norm(diff_o, -1.0, result_o, result_o_2);
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std::cout << GridLogMessage << "::::::::::::: Diff between mixed and regular CG: " << diff << std::endl;
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#ifdef HAVE_LIME
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if( GridCmdOptionExists(argv,argv+argc,"--checksums") )
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{
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std::string file1("./Propagator1");
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emptyUserRecord record;
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uint32_t nersc_csum;
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uint32_t scidac_csuma;
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uint32_t scidac_csumb;
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typedef SpinColourVectorD FermionD;
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typedef vSpinColourVectorD vFermionD;
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BinarySimpleMunger<FermionD,FermionD> munge;
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std::string format = getFormatString<vFermionD>();
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BinaryIO::writeLatticeObject<vFermionD,FermionD>(result_o,file1,munge, 0, format,
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nersc_csum,scidac_csuma,scidac_csumb);
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std::cout << GridLogMessage << " Mixed checksums "<<std::hex << scidac_csuma << " "<<scidac_csumb<<std::endl;
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BinaryIO::writeLatticeObject<vFermionD,FermionD>(result_o_2,file1,munge, 0, format,
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nersc_csum,scidac_csuma,scidac_csumb);
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std::cout << GridLogMessage << " CG checksums "<<std::hex << scidac_csuma << " "<<scidac_csumb<<std::endl;
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}
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#endif
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Grid_finalize();
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}
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