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Staggered phases first cut, c1, c2, u0

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This commit is contained in:
Azusa Yamaguchi 2016-11-03 16:26:56 +00:00
parent 164d3691db
commit 1c5b7a6be5
5 changed files with 227 additions and 12 deletions
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133
benchmarks/Benchmark_staggered.cc Normal file
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@ -0,0 +1,133 @@
/*************************************************************************************
Grid physics library, www.github.com/paboyle/Grid
Source file: ./benchmarks/Benchmark_wilson.cc
Copyright (C) 2015
Author: Peter Boyle <paboyle@ph.ed.ac.uk>
Author: paboyle <paboyle@ph.ed.ac.uk>
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;
using namespace Grid::QCD;
int main (int argc, char ** argv)
{
Grid_init(&argc,&argv);
std::vector<int> latt_size = GridDefaultLatt();
std::vector<int> simd_layout = GridDefaultSimd(Nd,vComplex::Nsimd());
std::vector<int> mpi_layout = GridDefaultMpi();
GridCartesian Grid(latt_size,simd_layout,mpi_layout);
GridRedBlackCartesian RBGrid(latt_size,simd_layout,mpi_layout);
int threads = GridThread::GetThreads();
std::cout<<GridLogMessage << "Grid is setup to use "<<threads<<" threads"<<std::endl;
std::cout<<GridLogMessage << "Grid floating point word size is REALF"<< sizeof(RealF)<<std::endl;
std::cout<<GridLogMessage << "Grid floating point word size is REALD"<< sizeof(RealD)<<std::endl;
std::cout<<GridLogMessage << "Grid floating point word size is REAL"<< sizeof(Real)<<std::endl;
std::vector<int> seeds({1,2,3,4});
GridParallelRNG pRNG(&Grid);
pRNG.SeedFixedIntegers(seeds);
// pRNG.SeedRandomDevice();
typedef typename ImprovedStaggeredFermionR::FermionField FermionField;
typename ImprovedStaggeredFermionR::ImplParams params;
FermionField src (&Grid); random(pRNG,src);
FermionField result(&Grid); result=zero;
FermionField ref(&Grid); ref=zero;
FermionField tmp(&Grid); tmp=zero;
FermionField err(&Grid); tmp=zero;
LatticeGaugeField Umu(&Grid); random(pRNG,Umu);
std::vector<LatticeColourMatrix> U(4,&Grid);
double volume=1;
for(int mu=0;mu<Nd;mu++){
volume=volume*latt_size[mu];
}
// Only one non-zero (y)
#if 0
Umu=zero;
Complex cone(1.0,0.0);
for(int nn=0;nn<Nd;nn++){
random(pRNG,U[nn]);
if(1) {
if (nn!=2) { U[nn]=zero; std::cout<<GridLogMessage << "zeroing gauge field in dir "<<nn<<std::endl; }
// else { U[nn]= cone;std::cout<<GridLogMessage << "unit gauge field in dir "<<nn<<std::endl; }
else { std::cout<<GridLogMessage << "random gauge field in dir "<<nn<<std::endl; }
}
PokeIndex<LorentzIndex>(Umu,U[nn],nn);
}
#endif
for(int mu=0;mu<Nd;mu++){
U[mu] = PeekIndex<LorentzIndex>(Umu,mu);
}
ref = zero;
/*
{ // Naive wilson implementation
ref = zero;
for(int mu=0;mu<Nd;mu++){
// ref = src + Gamma(Gamma::GammaX)* src ; // 1-gamma_x
tmp = U[mu]*Cshift(src,mu,1);
for(int i=0;i<ref._odata.size();i++){
ref._odata[i]+= tmp._odata[i] - Gamma(Gmu[mu])*tmp._odata[i]; ;
}
tmp =adj(U[mu])*src;
tmp =Cshift(tmp,mu,-1);
for(int i=0;i<ref._odata.size();i++){
ref._odata[i]+= tmp._odata[i] + Gamma(Gmu[mu])*tmp._odata[i]; ;
}
}
}
ref = -0.5*ref;
*/
RealD mass=0.1;
RealD c1=9.0/8.0;
RealD c2=-1.0/24.0;
ImprovedStaggeredFermionR Ds(Umu,Grid,RBGrid,mass,c1,c2,params);
std::cout<<GridLogMessage << "Calling Ds"<<std::endl;
int ncall=1000;
double t0=usecond();
for(int i=0;i<ncall;i++){
Ds.Dhop(src,result,0);
}
double t1=usecond();
double flops=(16*(3*(6+8+8)) + 15*3*2)*volume*ncall; // == 66*16 + == 1146
std::cout<<GridLogMessage << "Called Ds"<<std::endl;
std::cout<<GridLogMessage << "norm result "<< norm2(result)<<std::endl;
std::cout<<GridLogMessage << "norm ref "<< norm2(ref)<<std::endl;
std::cout<<GridLogMessage << "mflop/s = "<< flops/(t1-t0)<<std::endl;
err = ref-result;
std::cout<<GridLogMessage << "norm diff "<< norm2(err)<<std::endl;
Grid_finalize();
}

3
lib/qcd/action/Actions.h
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@ -260,6 +260,9 @@ typedef MobiusFermion<GparityWilsonImplR> GparityMobiusFermionR;
typedef MobiusFermion<GparityWilsonImplF> GparityMobiusFermionF;
typedef MobiusFermion<GparityWilsonImplD> GparityMobiusFermionD;
typedef ImprovedStaggeredFermion<StaggeredImplR> ImprovedStaggeredFermionR;
typedef ImprovedStaggeredFermion<StaggeredImplF> ImprovedStaggeredFermionF;
typedef ImprovedStaggeredFermion<StaggeredImplD> ImprovedStaggeredFermionD;
}}
///////////////////////////////////////////////////////////////////////////////

46
lib/qcd/action/fermion/FermionOperatorImpl.h
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@ -520,14 +520,17 @@ PARALLEL_FOR_LOOP
INHERIT_GIMPL_TYPES(Gimpl);
template <typename vtype> using iImplScalar = iScalar<iScalar<iScalar<vtype> > >;
template <typename vtype> using iImplSpinor = iScalar<iScalar<iVector<vtype, Dimension> > >;
template <typename vtype> using iImplHalfSpinor = iVector<iScalar<iVector<vtype, Dimension> >, Ngp>;
template <typename vtype> using iImplDoubledGaugeField = iVector<iScalar<iMatrix<vtype, Dimension> >, Nds>;
typedef iImplScalar<Simd> SiteComplex;
typedef iImplSpinor<Simd> SiteSpinor;
typedef iImplHalfSpinor<Simd> SiteHalfSpinor;
typedef iImplDoubledGaugeField<Simd> SiteDoubledGaugeField;
typedef Lattice<SiteComplex> ComplexField;
typedef Lattice<SiteSpinor> FermionField;
typedef Lattice<SiteDoubledGaugeField> DoubledGaugeField;
@ -564,15 +567,46 @@ PARALLEL_FOR_LOOP
conformable(Uds._grid, GaugeGrid);
conformable(Umu._grid, GaugeGrid);
GaugeLinkField U(GaugeGrid);
GaugeLinkField UU(GaugeGrid);
GaugeLinkField UUU(GaugeGrid);
GaugeLinkField Udag(GaugeGrid);
GaugeLinkField UUUdag(GaugeGrid);
for (int mu = 0; mu < Nd; mu++) {
// Staggered Phase.
ComplexField coor(GaugeGrid);
ComplexField phases(GaugeGrid);
ComplexField x(GaugeGrid); LatticeCoordinate(x,0);
ComplexField y(GaugeGrid); LatticeCoordinate(y,1);
ComplexField z(GaugeGrid); LatticeCoordinate(z,2);
ComplexField t(GaugeGrid); LatticeCoordinate(t,3);
SiteComplex zz(0.0,0.0);
SiteComplex one(1.0,0.0);
phases = one;
if ( mu == 1 ) phases = where( mod(x ,2)== zz, phases,-phases);
if ( mu == 2 ) phases = where( mod(x+y ,2)== zz, phases,-phases);
if ( mu == 3 ) phases = where( mod(x+y+z,2)== zz, phases,-phases);
U = PeekIndex<LorentzIndex>(Umu, mu);
UU = Gimpl::CovShiftForward(U,mu,U);
UUU= Gimpl::CovShiftForward(U,mu,UU);
U = U *phases;
UUU = UUU *phases;
PokeIndex<LorentzIndex>(Uds, U, mu);
PokeIndex<LorentzIndex>(UUUds, U, mu);
std::cout << GridLogMessage << " NOT created the treble links for staggered yet" <<std::endl;
std::cout << GridLogMessage << " Must do this and also apply the staggered phases which requires understanding the action conventions" <<std::endl;
U = adj(Cshift(U, mu, -1));
PokeIndex<LorentzIndex>(Uds, U, mu + 4);
PokeIndex<LorentzIndex>(UUUds, U, mu+4);
PokeIndex<LorentzIndex>(UUUds, UUU, mu);
std::cout << GridLogMessage << " Created the treble links for staggered Naik term" <<std::endl;
std::cout << GridLogMessage << " Multiplied the staggered phases which requires understanding the action conventions" <<std::endl;
Udag = adj( Cshift(U, mu, -1));
UUUdag = adj( Cshift(UUU, mu, -3));
PokeIndex<LorentzIndex>(Uds, Udag, mu + 4);
PokeIndex<LorentzIndex>(UUUds, UUUdag, mu+4);
}
}

47
lib/qcd/action/fermion/ImprovedStaggeredFermion.cc
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@ -43,6 +43,7 @@ ImprovedStaggeredFermionStatic::displacements({1, 1, 1, 1, -1, -1, -1, -1, 3, 3,
template <class Impl>
ImprovedStaggeredFermion<Impl>::ImprovedStaggeredFermion(GaugeField &_Umu, GridCartesian &Fgrid,
GridRedBlackCartesian &Hgrid, RealD _mass,
RealD _c1, RealD _c2,RealD _u0,
const ImplParams &p)
: Kernels(p),
_grid(&Fgrid),
@ -51,6 +52,9 @@ ImprovedStaggeredFermion<Impl>::ImprovedStaggeredFermion(GaugeField &_Umu, GridC
StencilEven(&Hgrid, npoint, Even, directions, displacements), // source is Even
StencilOdd(&Hgrid, npoint, Odd, directions, displacements), // source is Odd
mass(_mass),
c1(_c1),
c2(_c2),
u0(_u0),
Lebesgue(_grid),
LebesgueEvenOdd(_cbgrid),
Umu(&Fgrid),
@ -63,11 +67,48 @@ ImprovedStaggeredFermion<Impl>::ImprovedStaggeredFermion(GaugeField &_Umu, GridC
ImportGauge(_Umu);
}
////////////////////////////////////////////////////////////
// Momentum space propagator should be
// https://arxiv.org/pdf/hep-lat/9712010.pdf
//
// mom space action.
// gamma_mu i ( c1 sin pmu + c2 sin 3 pmu ) + m
//
// must track through staggered flavour/spin reduction in literature to
// turn to free propagator for the one component chi field, a la page 4/5
// of above link to implmement fourier based solver.
////////////////////////////////////////////////////////////
template <class Impl>
void ImprovedStaggeredFermion<Impl>::ImportGauge(const GaugeField &_Umu) {
GaugeField HUmu(_Umu._grid);
HUmu = _Umu * (-0.5);
Impl::DoubleStore(GaugeGrid(), Umu, UUUmu, HUmu);
GaugeLinkField U(GaugeGrid);
////////////////////////////////////////////////////////
// Double Store should take two fields for Naik and one hop separately.
////////////////////////////////////////////////////////
Impl::DoubleStore(GaugeGrid(), Umu, UUUmu, _Umu);
////////////////////////////////////////////////////////
// Apply scale factors to get the right fermion Kinetic term
//
// 0.5 ( U p(x+mu) - Udag(x-mu) p(x-mu) )
////////////////////////////////////////////////////////
for (int mu = 0; mu < Nd; mu++) {
U = PeekIndex<LorentzIndex>(Umu, mu);
PokeIndex<LorentzIndex>(Umu, U*( 0.5*c1/u0), mu );
U = PeekIndex<LorentzIndex>(Umu, mu+4);
PokeIndex<LorentzIndex>(Umu, U*(-0.5*c1/u0), mu+4);
U = PeekIndex<LorentzIndex>(UUUmu, mu);
PokeIndex<LorentzIndex>(UUUmu, U*( 0.5*c2/u0/u0/u0), mu );
U = PeekIndex<LorentzIndex>(UUUmu, mu+4);
PokeIndex<LorentzIndex>(UUUmu, U*(-0.5*c2/u0/u0/u0), mu+4);
}
pickCheckerboard(Even, UmuEven, Umu);
pickCheckerboard(Odd, UmuOdd , Umu);
pickCheckerboard(Even, UUUmuEven, UUUmu);

4
lib/qcd/action/fermion/ImprovedStaggeredFermion.h
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@ -108,6 +108,7 @@ class ImprovedStaggeredFermion : public StaggeredKernels<Impl>, public ImprovedS
// Constructor
ImprovedStaggeredFermion(GaugeField &_Umu, GridCartesian &Fgrid,
GridRedBlackCartesian &Hgrid, RealD _mass,
RealD _c1=9.0/8.0, RealD _c2=-1.0/24.0,RealD _u0,
const ImplParams &p = ImplParams());
// DoubleStore impl dependent
@ -122,6 +123,9 @@ class ImprovedStaggeredFermion : public StaggeredKernels<Impl>, public ImprovedS
// any other parameters of action ???
RealD mass;
RealD u0;
RealD c1;
RealD c2;
GridBase *_grid;
GridBase *_cbgrid;