/*************************************************************************************
Grid physics library, www.github.com/paboyle/Grid
Source file: ./tests/Test_fthmc.cc
Copyright (C) 2022
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/qcd/smearing/GaugeConfigurationMasked.h>
#include <Grid/qcd/smearing/JacobianAction.h>
using namespace std;
using namespace Grid;
typedef MobiusFermionD FermionAction;
typedef WilsonImplD FimplD;
typedef WilsonImplD FermionImplPolicy;
template<class Gimpl>
void ForceTest(Action<LatticeGaugeField> &action,ConfigurationBase<LatticeGaugeField> & smU,MomentumFilterBase<LatticeGaugeField> &Filter)
{
LatticeGaugeField U = smU.get_U(false); // unsmeared config
GridBase *UGrid = U.Grid();
std::vector<int> seeds({1,2,3,5});
GridSerialRNG sRNG; sRNG.SeedFixedIntegers(seeds);
GridParallelRNG RNG4(UGrid); RNG4.SeedFixedIntegers(seeds);
LatticeColourMatrix Pmu(UGrid);
LatticeGaugeField P(UGrid);
LatticeGaugeField UdSdU(UGrid);
std::cout << GridLogMessage << "*********************************************************"<<std::endl;
std::cout << GridLogMessage << " Force test for "<<action.action_name()<<std::endl;
std::cout << GridLogMessage << "*********************************************************"<<std::endl;
RealD eps=0.01;
std::cout << GridLogMessage << "+++++++++++++++++++++++++++++++++++++++++++++++++++++++++"<<std::endl;
std::cout << GridLogMessage << " Refresh "<<action.action_name()<<std::endl;
std::cout << GridLogMessage << "+++++++++++++++++++++++++++++++++++++++++++++++++++++++++"<<std::endl;
Gimpl::generate_momenta(P,sRNG,RNG4);
// Filter.applyFilter(P);
action.refresh(smU,sRNG,RNG4);
std::cout << GridLogMessage << "+++++++++++++++++++++++++++++++++++++++++++++++++++++++++"<<std::endl;
std::cout << GridLogMessage << " Action "<<action.action_name()<<std::endl;
std::cout << GridLogMessage << "+++++++++++++++++++++++++++++++++++++++++++++++++++++++++"<<std::endl;
RealD S1 = action.S(smU);
Gimpl::update_field(P,U,eps);
smU.set_Field(U);
std::cout << GridLogMessage << "+++++++++++++++++++++++++++++++++++++++++++++++++++++++++"<<std::endl;
std::cout << GridLogMessage << " Derivative "<<action.action_name()<<std::endl;
std::cout << GridLogMessage << "+++++++++++++++++++++++++++++++++++++++++++++++++++++++++"<<std::endl;
action.deriv(smU,UdSdU);
UdSdU = Ta(UdSdU);
// Filter.applyFilter(UdSdU);
DumpSliceNorm("Force",UdSdU,Nd-1);
Gimpl::update_field(P,U,eps);
smU.set_Field(U);
std::cout << GridLogMessage << "+++++++++++++++++++++++++++++++++++++++++++++++++++++++++"<<std::endl;
std::cout << GridLogMessage << " Action "<<action.action_name()<<std::endl;
std::cout << GridLogMessage << "+++++++++++++++++++++++++++++++++++++++++++++++++++++++++"<<std::endl;
RealD S2 = action.S(smU);
// Use the derivative
LatticeComplex dS(UGrid); dS = Zero();
for(int mu=0;mu<Nd;mu++){
auto UdSdUmu = PeekIndex<LorentzIndex>(UdSdU,mu);
Pmu= PeekIndex<LorentzIndex>(P,mu);
dS = dS - trace(Pmu*UdSdUmu)*eps*2.0*HMC_MOMENTUM_DENOMINATOR;
}
ComplexD dSpred = sum(dS);
RealD diff = S2-S1-dSpred.real();
std::cout<< GridLogMessage << "+++++++++++++++++++++++++++++++++++++++++++++++++++++++++"<<std::endl;
std::cout<< GridLogMessage << "S1 : "<< S1 <<std::endl;
std::cout<< GridLogMessage << "S2 : "<< S2 <<std::endl;
std::cout<< GridLogMessage << "dS : "<< S2-S1 <<std::endl;
std::cout<< GridLogMessage << "dSpred : "<< dSpred.real() <<std::endl;
std::cout<< GridLogMessage << "diff : "<< diff<<std::endl;
std::cout<< GridLogMessage << "*********************************************************"<<std::endl;
// assert(diff<1.0);
std::cout<< GridLogMessage << "Done" <<std::endl;
std::cout << GridLogMessage << "*********************************************************"<<std::endl;
}
int main (int argc, char ** argv)
{
Grid_init(&argc,&argv);
std::cout << std::setprecision(14);
Coordinate latt_size = GridDefaultLatt();
Coordinate mpi_layout = GridDefaultMpi();
Coordinate simd_layout = GridDefaultSimd(Nd,vComplex::Nsimd());
Coordinate shm;
GlobalSharedMemory::GetShmDims(mpi_layout,shm);
const int Ls=12;
const int Nt = latt_size[3];
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);
///////////////////// Gauge Field and Gauge Forces ////////////////////////////
LatticeGaugeField U(UGrid);
#if 0
FieldMetaData header;
std::string file("./ckpoint_lat.2000");
NerscIO::readConfiguration(U,header,file);
#else
std::vector<int> seeds({1,2,3,4,5,6,7,8});
GridParallelRNG RNG4(UGrid); RNG4.SeedFixedIntegers(seeds);
SU<Nc>::HotConfiguration(RNG4,U);
#endif
WilsonGaugeActionR PlaqAction(6.0);
IwasakiGaugeActionR RectAction(2.13);
PlaqAction.is_smeared = true;
RectAction.is_smeared = true;
////////////////////////////////////
// Fermion Action
////////////////////////////////////
RealD mass=0.01;
RealD pvmass=1.0;
RealD M5=1.8;
RealD b=1.5;
RealD c=0.5;
// Double versions
std::vector<Complex> boundary = {1,1,1,-1};
FermionAction::ImplParams Params(boundary);
FermionAction DdwfPeriodic(U,*FGrid,*FrbGrid,*UGrid,*UrbGrid,mass,M5,b,c,Params);
FermionAction PVPeriodic (U,*FGrid,*FrbGrid,*UGrid,*UrbGrid,pvmass,M5,b,c,Params);
double StoppingCondition = 1.0e-8;
double MaxCGIterations = 50000;
ConjugateGradient<LatticeFermion> CG(StoppingCondition,MaxCGIterations);
TwoFlavourRatioPseudoFermionAction<FimplD> Nf2(PVPeriodic, DdwfPeriodic,CG,CG);
Nf2.is_smeared = true;
////////////////////////////////////////////////
// Plaquette only FTHMC smearer
////////////////////////////////////////////////
double rho = 0.1;
Smear_Stout<PeriodicGimplR> Smearer(rho);
SmearedConfigurationMasked<PeriodicGimplR> SmartConfig(UGrid,2*Nd,Smearer);
SmearedConfiguration<PeriodicGimplR> StoutConfig(UGrid,1,Smearer);
JacobianAction<PeriodicGimplR> Jacobian(&SmartConfig);
////////////////////////////////////////////////
// Run some tests
////////////////////////////////////////////////
MomentumFilterNone<LatticeGaugeField> FilterNone;
std::cout << " ********* FIELD TRANSFORM SMEARING ***** "<<std::endl;
SmartConfig.set_Field(U);
ForceTest<GimplTypesR>(PlaqAction,SmartConfig,FilterNone);
SmartConfig.set_Field(U);
ForceTest<GimplTypesR>(RectAction,SmartConfig,FilterNone);
SmartConfig.set_Field(U);
ForceTest<GimplTypesR>(Jacobian,SmartConfig,FilterNone);
SmartConfig.set_Field(U);
ForceTest<GimplTypesR>(Nf2,SmartConfig,FilterNone);
std::cout << " ********* STOUT SMEARING ***** "<<std::endl;
StoutConfig.set_Field(U);
ForceTest<GimplTypesR>(PlaqAction,StoutConfig,FilterNone);
StoutConfig.set_Field(U);
ForceTest<GimplTypesR>(RectAction,StoutConfig,FilterNone);
StoutConfig.set_Field(U);
ForceTest<GimplTypesR>(Nf2,StoutConfig,FilterNone);
Grid_finalize();
}