portelli/Grid
1
0
Fork 0
mirror of https://github.com/paboyle/Grid.git synced 2024-11-15 02:05:37 +00:00
Code Releases Activity
9c106d625a
Grid/HMC/DWF2p1fIwasakiGparity.cc

317 lines
12 KiB
C++
Raw Blame History

/*************************************************************************************
Grid physics library, www.github.com/paboyle/Grid
Source file: ./HMC/DWF2p1fIwasakiGparity.cc
Copyright (C) 2015-2016
Author: Christopher Kelly <ckelly@bnl.gov>
Author: Peter Boyle <pabobyle@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 Grid;
//2+1f DWF+I ensemble with G-parity BCs
//designed to reproduce ensembles in https://arxiv.org/pdf/1908.08640.pdf
struct RatQuoParameters: Serializable {
GRID_SERIALIZABLE_CLASS_MEMBERS(RatQuoParameters,
double, bnd_lo,
double, bnd_hi,
Integer, action_degree,
double, action_tolerance,
Integer, md_degree,
double, md_tolerance,
Integer, reliable_update_freq,
Integer, bnd_check_freq);
RatQuoParameters() {
bnd_lo = 1e-2;
bnd_hi = 30;
action_degree = 10;
action_tolerance = 1e-10;
md_degree = 10;
md_tolerance = 1e-8;
bnd_check_freq = 20;
reliable_update_freq = 50;
}
void Export(RationalActionParams &into) const{
into.lo = bnd_lo;
into.hi = bnd_hi;
into.action_degree = action_degree;
into.action_tolerance = action_tolerance;
into.md_degree = md_degree;
into.md_tolerance = md_tolerance;
into.BoundsCheckFreq = bnd_check_freq;
}
};
struct EvolParameters: Serializable {
GRID_SERIALIZABLE_CLASS_MEMBERS(EvolParameters,
Integer, StartTrajectory,
Integer, Trajectories,
Integer, SaveInterval,
bool, MetropolisTest,
std::string, StartingType,
std::vector<Integer>, GparityDirs,
RatQuoParameters, rat_quo_l,
RatQuoParameters, rat_quo_s);
EvolParameters() {
//For initial thermalization; afterwards user should switch Metropolis on and use StartingType=CheckpointStart
MetropolisTest = false;
StartTrajectory = 0;
Trajectories = 50;
SaveInterval = 5;
StartingType = "ColdStart";
GparityDirs.resize(3, 1); //1 for G-parity, 0 for periodic
}
};
bool fileExists(const std::string &fn){
std::ifstream f(fn);
return f.good();
}
int main(int argc, char **argv) {
Grid_init(&argc, &argv);
int threads = GridThread::GetThreads();
// here make a routine to print all the relevant information on the run
std::cout << GridLogMessage << "Grid is setup to use " << threads << " threads" << std::endl;
//Read the user parameters
EvolParameters user_params;
if(fileExists("params.xml")){
std::cout << GridLogMessage << " Reading params.xml" << std::endl;
Grid::XmlReader rd("params.xml");
read(rd, "Params", user_params);
}else if(!GlobalSharedMemory::WorldRank){
std::cout << GridLogMessage << " File params.xml does not exist" << std::endl;
std::cout << GridLogMessage << " Writing xml template to params.xml.templ" << std::endl;
Grid::XmlWriter wr("params.xml.templ");
write(wr, "Params", user_params);
std::cout << GridLogMessage << " Done" << std::endl;
Grid_finalize();
return 0;
}
//Check the parameters
if(user_params.GparityDirs.size() != Nd-1){
std::cerr << "Error in input parameters: expect GparityDirs to have size = " << Nd-1 << std::endl;
exit(1);
}
for(int i=0;i<Nd-1;i++)
if(user_params.GparityDirs[i] != 0 && user_params.GparityDirs[i] != 1){
std::cerr << "Error in input parameters: expect GparityDirs values to be 0 (periodic) or 1 (G-parity)" << std::endl;
exit(1);
}
// Typedefs to simplify notation
typedef GparityDomainWallFermionD FermionActionD;
typedef typename FermionActionD::Impl_t FermionImplPolicyD;
typedef typename FermionActionD::FermionField FermionFieldD;
typedef GparityDomainWallFermionF FermionActionF;
typedef typename FermionActionF::Impl_t FermionImplPolicyF;
typedef typename FermionActionF::FermionField FermionFieldF;
typedef GeneralEvenOddRatioRationalMixedPrecPseudoFermionAction<FermionImplPolicyD,FermionImplPolicyF> MixedPrecRHMC;
//::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
IntegratorParameters MD;
typedef ConjugateHMCRunnerD<MinimumNorm2> HMCWrapper; //NB: This is the "Omelyan integrator"
MD.name = std::string("MinimumNorm2");
MD.MDsteps = 5; //5 steps of 0.2 for GP* ensembles
MD.trajL = 1.0;
HMCparameters HMCparams;
HMCparams.StartTrajectory = user_params.StartTrajectory;
HMCparams.Trajectories = user_params.Trajectories;
HMCparams.NoMetropolisUntil= 0;
HMCparams.StartingType = user_params.StartingType;
HMCparams.MetropolisTest = user_params.MetropolisTest;
HMCparams.MD = MD;
HMCWrapper TheHMC(HMCparams);
// Grid from the command line arguments --grid and --mpi
TheHMC.Resources.AddFourDimGrid("gauge"); // use default simd lanes decomposition
CheckpointerParameters CPparams;
CPparams.config_prefix = "ckpoint_lat";
CPparams.rng_prefix = "ckpoint_rng";
CPparams.saveInterval = user_params.SaveInterval;
CPparams.format = "IEEE64BIG";
TheHMC.Resources.LoadNerscCheckpointer(CPparams);
//Note that checkpointing saves the RNG state so that this initialization is required only for the very first configuration
RNGModuleParameters RNGpar;
RNGpar.serial_seeds = "1 2 3 4 5";
RNGpar.parallel_seeds = "6 7 8 9 10";
TheHMC.Resources.SetRNGSeeds(RNGpar);
typedef PlaquetteMod<HMCWrapper::ImplPolicy> PlaqObs;
TheHMC.Resources.AddObservable<PlaqObs>();
//////////////////////////////////////////////
const int Ls = 16;
Real beta = 2.13;
Real light_mass = 0.01;
Real strange_mass = 0.032;
Real pv_mass = 1.0;
RealD M5 = 1.8;
//Setup the Grids
auto GridPtrD = TheHMC.Resources.GetCartesian();
auto GridRBPtrD = TheHMC.Resources.GetRBCartesian();
auto FGridD = SpaceTimeGrid::makeFiveDimGrid(Ls,GridPtrD);
auto FrbGridD = SpaceTimeGrid::makeFiveDimRedBlackGrid(Ls,GridPtrD);
GridCartesian* GridPtrF = SpaceTimeGrid::makeFourDimGrid(GridDefaultLatt(), GridDefaultSimd(Nd, vComplexF::Nsimd()), GridDefaultMpi());
GridRedBlackCartesian* GridRBPtrF = SpaceTimeGrid::makeFourDimRedBlackGrid(GridPtrF);
auto FGridF = SpaceTimeGrid::makeFiveDimGrid(Ls,GridPtrF);
auto FrbGridF = SpaceTimeGrid::makeFiveDimRedBlackGrid(Ls,GridPtrF);
ConjugateIwasakiGaugeActionD GaugeAction(beta);
// temporarily need a gauge field
LatticeGaugeFieldD Ud(GridPtrD);
LatticeGaugeFieldF Uf(GridPtrF);
//Setup the BCs
FermionActionD::ImplParams Params;
for(int i=0;i<Nd-1;i++) Params.twists = user_params.GparityDirs[i]; //G-parity directions
Params.twists[Nd-1] = 1; //APBC in time direction
std::vector<int> dirs4(Nd);
for(int i=0;i<Nd-1;i++) dirs4[i] = user_params.GparityDirs[i];
dirs4[Nd-1] = 0; //periodic gauge BC in time
ConjugateGimplD::setDirections(dirs4); //gauge BC
////////////////////////////////////
// Collect actions
////////////////////////////////////
ActionLevel<HMCWrapper::Field> Level1(1); //light quark
ActionLevel<HMCWrapper::Field> Level2(1); //strange quark
ActionLevel<HMCWrapper::Field> Level3(8); //gauge (8 increments per step)
////////////////////////////////////
// Strange action
////////////////////////////////////
//Use same parameters as used for 16GPX ensembles
RationalActionParams rat_act_params_s;
rat_act_params_s.inv_pow = 4; // (M^dag M)^{1/4}
rat_act_params_s.precision= 60;
rat_act_params_s.MaxIter = 10000;
user_params.rat_quo_s.Export(rat_act_params_s);
//For the 16GPX ensembles we used Hasenbusch mass splitting:
// det[ (M^dag(0.032) M(0.032)) / (M^dag(1.0) M(1.0)) ]^{1/4} * det[ (M^dag(0.01) M(0.01)) / (M^dag(1.0) M(1.0)) ]^{1/2}
//=
// [ det[ (M^dag(0.032) M(0.032)) / (M^dag(1.0) M(1.0)) ]^{1/4} ]^3 * det[ (M^dag(0.01) M(0.01)) / (M^dag(0.032) M(0.032)) ]^{1/2}
//I don't know if it's actually necessary for the action objects to be independent instances...
int n_hasenbusch_s = 3;
std::vector<FermionActionD*> Numerators_sD(n_hasenbusch_s);
std::vector<FermionActionD*> Denominators_sD(n_hasenbusch_s);
std::vector<FermionActionF*> Numerators_sF(n_hasenbusch_s);
std::vector<FermionActionF*> Denominators_sF(n_hasenbusch_s);
std::vector<MixedPrecRHMC*> Quotients_s(n_hasenbusch_s);
for(int h=0;h<n_hasenbusch_s;h++){
Numerators_sD[h] = new FermionActionD(Ud,*FGridD,*FrbGridD,*GridPtrD,*GridRBPtrD,strange_mass,M5,Params);
Denominators_sD[h] = new FermionActionD(Ud,*FGridD,*FrbGridD,*GridPtrD,*GridRBPtrD,pv_mass, M5,Params);
Numerators_sF[h] = new FermionActionF(Uf,*FGridF,*FrbGridF,*GridPtrF,*GridRBPtrF,strange_mass,M5,Params);
Denominators_sF[h] = new FermionActionF(Uf,*FGridF,*FrbGridF,*GridPtrF,*GridRBPtrF,pv_mass, M5,Params);
//note I define the numerator operator wrt how they appear in the determinant
Quotients_s[h] = new MixedPrecRHMC(*Denominators_sD[h], *Numerators_sD[h], *Denominators_sF[h], *Numerators_sF[h], rat_act_params_s, user_params.rat_quo_s.reliable_update_freq);
Level2.push_back(Quotients_s[h]);
}
/////////////////////////////////////////////////////////////
// Light action
/////////////////////////////////////////////////////////////
//We don't Hasenbusch the light quark directly, instead the denominator mass is set equal to the strange mass; cf above
FermionActionD Numerator_lD(Ud,*FGridD,*FrbGridD,*GridPtrD,*GridRBPtrD, light_mass,M5,Params);
FermionActionD Denominator_lD(Ud,*FGridD,*FrbGridD,*GridPtrD,*GridRBPtrD, strange_mass,M5,Params);
FermionActionF Numerator_lF(Uf,*FGridF,*FrbGridF,*GridPtrF,*GridRBPtrF, light_mass,M5,Params);
FermionActionF Denominator_lF(Uf,*FGridF,*FrbGridF,*GridPtrF,*GridRBPtrF, strange_mass,M5,Params);
RationalActionParams rat_act_params_l;
rat_act_params_l.inv_pow = 2; // (M^dag M)^{1/2}
rat_act_params_l.precision= 60;
rat_act_params_l.MaxIter = 10000;
user_params.rat_quo_l.Export(rat_act_params_l);
MixedPrecRHMC Quotient_l(Denominator_lD, Numerator_lD, Denominator_lF, Numerator_lF, rat_act_params_l, user_params.rat_quo_l.reliable_update_freq);
Level1.push_back(&Quotient_l);
/////////////////////////////////////////////////////////////
// Gauge action
/////////////////////////////////////////////////////////////
Level3.push_back(&GaugeAction);
TheHMC.TheAction.push_back(Level1);
TheHMC.TheAction.push_back(Level2);
TheHMC.TheAction.push_back(Level3);
std::cout << GridLogMessage << " Action complete "<< std::endl;
/////////////////////////////////////////////////////////////
// HMC parameters are serialisable
if(0){
TheHMC.Resources.AddRNGs();
ConjugateGimplR::HotConfiguration(TheHMC.Resources.GetParallelRNG(), Ud);
Quotient_l.refresh(Ud, TheHMC.Resources.GetParallelRNG());
LatticeGaugeFieldD out(Ud);
std::cout << GridLogMessage << " Running the derivative "<< std::endl;
Quotient_l.deriv(Ud,out);
std::cout << GridLogMessage << " Finished running the derivative "<< std::endl;
Numerator_lD.Report();
Denominator_lD.Report();
}
if(1){
std::cout << GridLogMessage << " Running the HMC "<< std::endl;
TheHMC.Run(); // no smearing
}
std::cout << GridLogMessage << " Done" << std::endl;
Grid_finalize();
return 0;
} // main
View Git Blame Copy Permalink