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8^4 test for PETSc

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Peter Boyle 2024-07-22 15:25:17 -04:00
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tests/debug/Test_8888.cc Normal file
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/*************************************************************************************
Grid physics library, www.github.com/paboyle/Grid
Source file: ./tests/Test_general_coarse_hdcg.cc
Copyright (C) 2023
Author: Peter Boyle <pboyle@bnl.gov>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
See the full license in the file "LICENSE" in the top level distribution directory
*************************************************************************************/
/* END LEGAL */
#include <Grid/Grid.h>
#include <Grid/algorithms/iterative/ImplicitlyRestartedBlockLanczos.h>
#include <Grid/algorithms/iterative/ImplicitlyRestartedBlockLanczosCoarse.h>
#include <Grid/algorithms/iterative/AdefMrhs.h>
using namespace std;
using namespace Grid;
int main (int argc, char ** argv)
{
Grid_init(&argc,&argv);
const int Ls=8;
const int nbasis = 40;
const int cb = 0 ;
RealD mass=0.01;
RealD M5=1.8;
RealD b=1.0;
RealD c=0.0;
GridCartesian * UGrid = SpaceTimeGrid::makeFourDimGrid(GridDefaultLatt(),
GridDefaultSimd(Nd,vComplex::Nsimd()),
GridDefaultMpi());
GridRedBlackCartesian * UrbGrid = SpaceTimeGrid::makeFourDimRedBlackGrid(UGrid);
GridCartesian * FGrid = SpaceTimeGrid::makeFiveDimGrid(Ls,UGrid);
GridRedBlackCartesian * FrbGrid = SpaceTimeGrid::makeFiveDimRedBlackGrid(Ls,UGrid);
///////////////////////// RNGs /////////////////////////////////
std::vector<int> seeds4({1,2,3,4});
std::vector<int> seeds5({5,6,7,8});
std::vector<int> cseeds({5,6,7,8});
GridParallelRNG RNG5(FGrid); RNG5.SeedFixedIntegers(seeds5);
GridParallelRNG RNG4(UGrid); RNG4.SeedFixedIntegers(seeds4);
///////////////////////// Configuration /////////////////////////////////
LatticeGaugeField Umu(UGrid);
FieldMetaData header;
std::string file("ckpoint_EODWF_lat.125");
NerscIO::readConfiguration(Umu,header,file);
//////////////////////// Fermion action //////////////////////////////////
MobiusFermionD Ddwf(Umu,*FGrid,*FrbGrid,*UGrid,*UrbGrid,mass,M5,b,c);
MdagMLinearOperator<MobiusFermionD, LatticeFermion> HermOp(Ddwf);
std::cout << "**************************************"<<std::endl;
std::cout << " Fine Power method "<<std::endl;
std::cout << "**************************************"<<std::endl;
LatticeFermionD pm_src(FGrid);
pm_src = ComplexD(1.0);
PowerMethod<LatticeFermionD> fPM;
fPM(HermOp,pm_src);
std::cout << "**************************************"<<std::endl;
std::cout << " Fine Lanczos (poly, low) "<<std::endl;
std::cout << "**************************************"<<std::endl;
int Nk=80;
int Nm=Nk*3;
int Nstop=8;
int Nconv_test_interval=1;
// Chebyshev<LatticeFermionD> IRLChebyLo(0.2,64.0,201); // 1 iter
Chebyshev<LatticeFermionD> IRLChebyLo(0.0,55.0,101); // 1 iter
FunctionHermOp<LatticeFermionD> PolyOp(IRLChebyLo,HermOp);
PlainHermOp<LatticeFermionD> Op(HermOp);
ImplicitlyRestartedLanczos IRL(PolyOp,
Op,
Nk, // sought vecs
Nk, // sought vecs
Nm, // spare vecs
1.0e-8,
10 // Max iterations
);
int Nconv;
std::vector<RealD> eval(Nm);
std::vector<LatticeFermionD> evec(Nm,FGrid);
LatticeFermionD irl_src(FGrid);
IRL.calc(eval,evec,irl_src,Nconv);
Grid_finalize();
return 0;
}