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In EOFA pseudofermion action, implemented M^{-1} (this costs the same as M for EOFA!)

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Added tests/solver/Test_eofa_inv.cc to test the above
In MDWF+ID GPBC binary, tests of RHMC approx for the action / MD approxs can be performed separately using a cmdline toggle
This commit is contained in:
Christopher Kelly
2021-06-03 11:11:14 -04:00
parent e1a02bb80a
commit c3b99de33f
3 changed files with 246 additions and 31 deletions
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tests/solver/Test_eofa_inv.cc Normal file
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/*************************************************************************************
Grid physics library, www.github.com/paboyle/Grid
Source file: ./tests/solver/Test_eofa_inv.cc
Copyright (C) 2017
Author: Christopher Kelly <ckelly@bnl.gov>
Author: Peter Boyle <paboyle@ph.ed.ac.uk>
Author: David Murphy <dmurphy@phys.columbia.edu>
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>
using namespace std;
using namespace Grid;
;
int main (int argc, char** argv)
{
Grid_init(&argc, &argv);
Coordinate latt_size = GridDefaultLatt();
Coordinate simd_layout = GridDefaultSimd(Nd,vComplex::Nsimd());
Coordinate mpi_layout = GridDefaultMpi();
const int Ls = 8;
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);
// Want a different conf at every run
// First create an instance of an engine.
std::random_device rnd_device;
// Specify the engine and distribution.
std::mt19937 mersenne_engine(rnd_device());
std::uniform_int_distribution<int> dist(1, 100);
auto gen = std::bind(dist, mersenne_engine);
std::vector<int> seeds4(4);
generate(begin(seeds4), end(seeds4), gen);
//std::vector<int> seeds4({1,2,3,5});
std::vector<int> seeds5({5,6,7,8});
GridParallelRNG RNG5(FGrid); RNG5.SeedFixedIntegers(seeds5);
GridParallelRNG RNG4(UGrid); RNG4.SeedFixedIntegers(seeds4);
int threads = GridThread::GetThreads();
std::cout << GridLogMessage << "Grid is setup to use " << threads << " threads" << std::endl;
LatticeFermion phi (FGrid); gaussian(RNG5, phi);
LatticeFermion Mphi (FGrid);
LatticeFermion MphiPrime (FGrid);
LatticeGaugeField U(UGrid);
SU<Nc>::HotConfiguration(RNG4,U);
////////////////////////////////////
// Unmodified matrix element
////////////////////////////////////
RealD b = 2.5;
RealD c = 1.5;
RealD mf = 0.01;
RealD mb = 1.0;
RealD M5 = 1.8;
MobiusEOFAFermionR Lop(U, *FGrid, *FrbGrid, *UGrid, *UrbGrid, mf, mf, mb, 0.0, -1, M5, b, c);
MobiusEOFAFermionR Rop(U, *FGrid, *FrbGrid, *UGrid, *UrbGrid, mb, mf, mb, -1.0, 1, M5, b, c);
OneFlavourRationalParams Params(0.95, 100.0, 5000, 1.0e-10, 12);
ConjugateGradient<LatticeFermion> CG(1.0e-10, 5000);
ExactOneFlavourRatioPseudoFermionAction<WilsonImplR> Meofa(Lop, Rop, CG, CG, CG, CG, CG, Params, false);
GridSerialRNG sRNG; sRNG.SeedFixedIntegers(seeds4);
//Random field
LatticeFermion eta(FGrid);
gaussian(RNG5,eta);
//Check left inverse
LatticeFermion Meta(FGrid);
Meofa.Meofa(U, eta, Meta);
LatticeFermion MinvMeta(FGrid);
Meofa.MeofaInv(U, Meta, MinvMeta);
LatticeFermion diff = MinvMeta - eta;
std::cout << GridLogMessage << "eta: " << norm2(eta) << " M*eta: " << norm2(Meta) << " M^{-1}*M*eta: " << norm2(MinvMeta) << " M^{-1}*M*eta - eta: " << norm2(diff) << " (expect 0)" << std::endl;
assert(norm2(diff) < 1e-8);
//Check right inverse
LatticeFermion MinvEta(FGrid);
Meofa.MeofaInv(U, eta, MinvEta);
LatticeFermion MMinvEta(FGrid);
Meofa.Meofa(U, MinvEta, MMinvEta);
diff = MMinvEta - eta;
std::cout << GridLogMessage << "eta: " << norm2(eta) << " M^{-1}*eta: " << norm2(MinvEta) << " M*M^{-1}*eta: " << norm2(MMinvEta) << " M*M^{-1}*eta - eta: " << norm2(diff) << " (expect 0)" << std::endl;
assert(norm2(diff) < 1e-8);
std::cout << GridLogMessage << "Done" << std::endl;
Grid_finalize();
}