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416 lines
17 KiB
C++
416 lines
17 KiB
C++
/*************************************************************************************
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Grid physics library, www.github.com/paboyle/Grid
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Source file:
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Copyright (C) 2015-2016
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Author: Peter Boyle <pabobyle@ph.ed.ac.uk>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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See the full license in the file "LICENSE" in the top level distribution
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directory
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*************************************************************************************/
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/* END LEGAL */
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#include <Grid/Grid.h>
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#include <Grid/qcd/action/momentum/DirichletFilter.h>
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#include <Grid/qcd/action/momentum/DDHMCfilter.h>
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#include <Grid/qcd/action/fermion/DirichletFermionOperator.h>
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#include <Grid/qcd/action/fermion/SchurFactoredFermionOperator.h>
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#include <Grid/qcd/action/pseudofermion/DomainDecomposedBoundaryTwoFlavourPseudoFermion.h>
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#include <Grid/qcd/action/pseudofermion/DomainDecomposedBoundaryTwoFlavourRatioPseudoFermion.h>
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#include <Grid/qcd/action/pseudofermion/DomainDecomposedBoundaryTwoFlavourBosonPseudoFermion.h>
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NAMESPACE_BEGIN(Grid);
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#define MIXED_PRECISION
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/*
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* Need a plan for gauge field update for mixed precision in HMC (2x speed up)
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* -- Store the single prec action operator.
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* -- Clone the gauge field from the operator function argument.
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* -- Build the mixed precision operator dynamically from the passed operator and single prec clone.
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*/
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template<class FermionOperatorD, class FermionOperatorF, class SchurOperatorD, class SchurOperatorF>
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class MixedPrecisionConjugateGradientOperatorFunction : public OperatorFunction<typename FermionOperatorD::FermionField> {
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public:
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typedef typename FermionOperatorD::FermionField FieldD;
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typedef typename FermionOperatorF::FermionField FieldF;
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using OperatorFunction<FieldD>::operator();
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RealD Tolerance;
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RealD InnerTolerance; //Initial tolerance for inner CG. Defaults to Tolerance but can be changed
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Integer MaxInnerIterations;
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Integer MaxOuterIterations;
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GridBase* SinglePrecGrid4; //Grid for single-precision fields
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GridBase* SinglePrecGrid5; //Grid for single-precision fields
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RealD OuterLoopNormMult; //Stop the outer loop and move to a final double prec solve when the residual is OuterLoopNormMult * Tolerance
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FermionOperatorF &FermOpF;
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FermionOperatorD &FermOpD;;
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SchurOperatorF &LinOpF;
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SchurOperatorD &LinOpD;
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Integer TotalInnerIterations; //Number of inner CG iterations
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Integer TotalOuterIterations; //Number of restarts
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Integer TotalFinalStepIterations; //Number of CG iterations in final patch-up step
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MixedPrecisionConjugateGradientOperatorFunction(RealD tol,
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Integer maxinnerit,
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Integer maxouterit,
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GridBase* _sp_grid4,
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GridBase* _sp_grid5,
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FermionOperatorF &_FermOpF,
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FermionOperatorD &_FermOpD,
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SchurOperatorF &_LinOpF,
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SchurOperatorD &_LinOpD):
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LinOpF(_LinOpF),
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LinOpD(_LinOpD),
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FermOpF(_FermOpF),
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FermOpD(_FermOpD),
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Tolerance(tol),
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InnerTolerance(tol),
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MaxInnerIterations(maxinnerit),
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MaxOuterIterations(maxouterit),
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SinglePrecGrid4(_sp_grid4),
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SinglePrecGrid5(_sp_grid5),
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OuterLoopNormMult(100.)
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{ };
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void operator()(LinearOperatorBase<FieldD> &LinOpU, const FieldD &src, FieldD &psi)
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{
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SchurOperatorD * SchurOpU = static_cast<SchurOperatorD *>(&LinOpU);
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// Assumption made in code to extract gauge field
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// We could avoid storing LinopD reference alltogether ?
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assert(&(SchurOpU->_Mat)==&(LinOpD._Mat));
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////////////////////////////////////////////////////////////////////////////////////
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// Must snarf a single precision copy of the gauge field in Linop_d argument
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////////////////////////////////////////////////////////////////////////////////////
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typedef typename FermionOperatorF::GaugeField GaugeFieldF;
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typedef typename FermionOperatorD::GaugeField GaugeFieldD;
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typedef typename FermionOperatorF::GaugeLinkField GaugeLinkFieldF;
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typedef typename FermionOperatorD::GaugeLinkField GaugeLinkFieldD;
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GridBase * GridPtrF = SinglePrecGrid4;
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GridBase * GridPtrD = FermOpD.GaugeGrid();
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////////////////////////////////////////////////////////////////////////////////////
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// Moving this to a Clone method of fermion operator would allow to duplicate the
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// physics parameters and decrease gauge field copies
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////////////////////////////////////////////////////////////////////////////////////
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auto &Umu_d = FermOpD.GetDoubledGaugeField();
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auto &Umu_f = FermOpF.GetDoubledGaugeField();
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auto &Umu_fe= FermOpF.GetDoubledGaugeFieldE();
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auto &Umu_fo= FermOpF.GetDoubledGaugeFieldO();
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precisionChange(Umu_f,Umu_d);
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pickCheckerboard(Even,Umu_fe,Umu_f);
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pickCheckerboard(Odd ,Umu_fo,Umu_f);
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////////////////////////////////////////////////////////////////////////////////////
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// Could test to make sure that LinOpF and LinOpD agree to single prec?
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////////////////////////////////////////////////////////////////////////////////////
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/*
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FieldD srcD(FermOpD.FermionRedBlackGrid());
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FieldD tmpD(FermOpD.FermionRedBlackGrid());
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FieldF tmpF(FermOpF.FermionRedBlackGrid());
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FieldF srcF(FermOpF.FermionRedBlackGrid());
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srcD = 1.0;
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precisionChange(srcF,srcD);
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std::cout << GridLogMessage << " Prec Src "<<norm2(srcF)<<" "<<norm2(srcD) <<std::endl;
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std::cout << GridLogMessage << " LinopF " <<std::endl;
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LinOpF.Op(srcF,tmpF); std::cout << " Test of operators "<<norm2(tmpF)<<std::endl;
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LinOpD.Op(srcD,tmpD); std::cout << " Test of operators "<<norm2(tmpD)<<std::endl;
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*/
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////////////////////////////////////////////////////////////////////////////////////
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// Make a mixed precision conjugate gradient
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////////////////////////////////////////////////////////////////////////////////////
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MixedPrecisionConjugateGradient<FieldD,FieldF> MPCG(Tolerance,MaxInnerIterations,MaxOuterIterations,SinglePrecGrid5,LinOpF,LinOpD);
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std::cout << GridLogMessage << "Calling mixed precision Conjugate Gradient" <<std::endl;
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MPCG(src,psi);
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}
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};
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NAMESPACE_END(Grid);
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int main(int argc, char **argv)
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{
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using namespace Grid;
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Grid_init(&argc, &argv);
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int threads = GridThread::GetThreads();
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// here make a routine to print all the relevant information on the run
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std::cout << GridLogMessage << "Grid is setup to use " << threads << " threads" << std::endl;
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// Typedefs to simplify notation
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typedef WilsonImplR FermionImplPolicy;
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typedef MobiusFermionR FermionAction;
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typedef MobiusFermionF FermionActionF;
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typedef DirichletFermionOperator<WilsonImplR> DirichletFermion;
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typedef DirichletFermionOperator<WilsonImplF> DirichletFermionF;
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typedef MobiusEOFAFermionR FermionEOFAAction;
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typedef typename FermionAction::FermionField FermionField;
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typedef typename FermionActionF::FermionField FermionFieldF;
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typedef Grid::XmlReader Serialiser;
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//::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
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IntegratorParameters MD;
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// typedef GenericHMCRunner<LeapFrog> HMCWrapper;
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// MD.name = std::string("Leap Frog");
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// typedef GenericHMCRunner<ForceGradient> HMCWrapper;
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// MD.name = std::string("Force Gradient");
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typedef GenericHMCRunner<MinimumNorm2> HMCWrapper;
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MD.name = std::string("MinimumNorm2");
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MD.MDsteps = 12;
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MD.trajL = 1.0;
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HMCparameters HMCparams;
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HMCparams.StartTrajectory = 26;
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HMCparams.Trajectories = 1000;
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HMCparams.NoMetropolisUntil= 0;
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// "[HotStart, ColdStart, TepidStart, CheckpointStart]\n";
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//HMCparams.StartingType =std::string("ColdStart");
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HMCparams.StartingType =std::string("CheckpointStart");
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HMCparams.MD = MD;
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HMCWrapper TheHMC(HMCparams);
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// Grid from the command line arguments --grid and --mpi
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TheHMC.Resources.AddFourDimGrid("gauge"); // use default simd lanes decomposition
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CheckpointerParameters CPparams;
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CPparams.config_prefix = "ckpoint_EOFA4D_lat";
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CPparams.rng_prefix = "ckpoint_EOFA4D_rng";
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CPparams.saveInterval = 1;
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CPparams.format = "IEEE64BIG";
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TheHMC.Resources.LoadNerscCheckpointer(CPparams);
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RNGModuleParameters RNGpar;
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RNGpar.serial_seeds = "1 2 3 4 5";
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RNGpar.parallel_seeds = "6 7 8 9 10";
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TheHMC.Resources.SetRNGSeeds(RNGpar);
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// Momentum Dirichlet
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Coordinate Block({16,16,16,16});
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// TheHMC.Resources.SetMomentumFilter(new DirichletFilter<WilsonImplR::Field>(Block));
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TheHMC.Resources.SetMomentumFilter(new DDHMCFilter<WilsonImplR::Field>(Block,1));
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// Construct observables
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// here there is too much indirection
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typedef PlaquetteMod<HMCWrapper::ImplPolicy> PlaqObs;
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TheHMC.Resources.AddObservable<PlaqObs>();
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//////////////////////////////////////////////
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const int Ls = 16;
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Real beta = 2.13;
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Real light_mass = 0.01;
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Real strange_mass = 0.04;
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Real pv_mass = 1.0;
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RealD M5 = 1.8;
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RealD b = 1.0;
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RealD c = 0.0;
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std::vector<Real> hasenbusch({ 0.016, 0.04, 0.4 });
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auto GridPtr = TheHMC.Resources.GetCartesian();
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auto GridRBPtr = TheHMC.Resources.GetRBCartesian();
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auto FGrid = SpaceTimeGrid::makeFiveDimGrid(Ls,GridPtr);
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auto FrbGrid = SpaceTimeGrid::makeFiveDimRedBlackGrid(Ls,GridPtr);
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Coordinate latt = GridDefaultLatt();
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Coordinate mpi = GridDefaultMpi();
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Coordinate simdF = GridDefaultSimd(Nd,vComplexF::Nsimd());
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Coordinate simdD = GridDefaultSimd(Nd,vComplexD::Nsimd());
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auto GridPtrF = SpaceTimeGrid::makeFourDimGrid(latt,simdF,mpi);
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auto GridRBPtrF = SpaceTimeGrid::makeFourDimRedBlackGrid(GridPtrF);
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auto FGridF = SpaceTimeGrid::makeFiveDimGrid(Ls,GridPtrF);
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auto FrbGridF = SpaceTimeGrid::makeFiveDimRedBlackGrid(Ls,GridPtrF);
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IwasakiGaugeActionR GaugeAction(beta);
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// temporarily need a gauge field
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LatticeGaugeField U(GridPtr);
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LatticeGaugeFieldF UF(GridPtrF);
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// These lines are unecessary if BC are all periodic
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std::vector<Complex> boundary = {1,1,1,-1};
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FermionAction::ImplParams Params(boundary);
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FermionAction::ImplParams DirichletParams(boundary);
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DirichletParams.locally_periodic=true;
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double ActionStoppingCondition = 1e-10;
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double DerivativeStoppingCondition = 1e-8;
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double MaxCGIterations = 30000;
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////////////////////////////////////
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// Collect actions
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////////////////////////////////////
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ActionLevel<HMCWrapper::Field> Level1(1);
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ActionLevel<HMCWrapper::Field> Level2(8);
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ConjugateGradient<FermionField> ActionCG(ActionStoppingCondition,MaxCGIterations);
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ConjugateGradient<FermionField> DerivativeCG(DerivativeStoppingCondition,MaxCGIterations);
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////////////////////////////////////
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// up down action
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////////////////////////////////////
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std::vector<Real> light_den;
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std::vector<Real> light_num;
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int n_hasenbusch = hasenbusch.size();
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light_den.push_back(light_mass);
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for(int h=0;h<n_hasenbusch;h++){
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light_den.push_back(hasenbusch[h]);
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light_num.push_back(hasenbusch[h]);
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}
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light_num.push_back(pv_mass);
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//////////////////////////////////////////////////////////////
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// Forced to replicate the MxPCG and DenominatorsF etc.. because
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// there is no convenient way to "Clone" physics params from double op
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// into single op for any operator pair.
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// Same issue prevents using MxPCG in the Heatbath step
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//////////////////////////////////////////////////////////////
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typedef SchurDiagMooeeOperator<DirichletFermionF,FermionFieldF> LinearOperatorF;
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typedef SchurDiagMooeeOperator<DirichletFermion ,FermionField > LinearOperatorD;
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// typedef SchurDiagMooeeDagOperator<FermionActionF,FermionFieldF> LinearOperatorDagF;
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// typedef SchurDiagMooeeDagOperator<FermionAction ,FermionField > LinearOperatorDagD;
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typedef MixedPrecisionConjugateGradientOperatorFunction<DirichletFermion,
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DirichletFermionF,
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LinearOperatorD,
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LinearOperatorF> MxPCG;
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// typedef MixedPrecisionConjugateGradientOperatorFunction<MobiusFermionD,MobiusFermionF,LinearOperatorDagD,LinearOperatorDagF> MxDagPCG;
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std::vector<FermionAction *> PeriNumerators;
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std::vector<FermionAction *> PeriDenominators;
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std::vector<FermionAction *> DNumerators;
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std::vector<FermionAction *> DDenominators;
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std::vector<FermionActionF *> DDenominatorsF;
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std::vector<DirichletFermion *> DirichletNumerators;
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std::vector<DirichletFermion *> DirichletDenominators;
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std::vector<DirichletFermionF *> DirichletDenominatorsF;
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std::vector<TwoFlavourEvenOddRatioPseudoFermionAction<FermionImplPolicy> *> Quotients;
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std::vector<SchurFactoredFermionOperator<DomainWallFermionR::Impl_t> *> BoundaryNumerators;
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std::vector<SchurFactoredFermionOperator<DomainWallFermionR::Impl_t> *> BoundaryDenominators;
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std::vector<DomainDecomposedBoundaryTwoFlavourRatioPseudoFermion<DomainWallFermionR::Impl_t> *> BoundaryQuotients;
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std::vector<MxPCG *> ActionMPCG;
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std::vector<MxPCG *> MPCG;
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std::vector<FermionActionF *> DenominatorsF;
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std::vector<LinearOperatorD *> LinOpD;
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std::vector<LinearOperatorF *> LinOpF;
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for(int h=0;h<n_hasenbusch+1;h++){
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std::cout << GridLogMessage << " 2f quotient Action "<< light_num[h] << " / " << light_den[h]<< std::endl;
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PeriNumerators.push_back (new FermionAction(U,*FGrid,*FrbGrid,*GridPtr,*GridRBPtr,light_num[h],M5,b,c, Params));
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PeriDenominators.push_back(new FermionAction(U,*FGrid,*FrbGrid,*GridPtr,*GridRBPtr,light_den[h],M5,b,c, Params));
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DNumerators.push_back (new FermionAction(U,*FGrid,*FrbGrid,*GridPtr,*GridRBPtr,light_num[h],M5,b,c, DirichletParams));
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DDenominators.push_back(new FermionAction(U,*FGrid,*FrbGrid,*GridPtr,*GridRBPtr,light_den[h],M5,b,c, DirichletParams));
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DDenominatorsF.push_back(new FermionActionF(UF,*FGridF,*FrbGridF,*GridPtrF,*GridRBPtrF,light_den[h],M5,b,c, DirichletParams));
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DirichletNumerators.push_back (new DirichletFermion(*DNumerators[h],Block));
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DirichletDenominators.push_back(new DirichletFermion(*DDenominators[h],Block));
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DirichletDenominatorsF.push_back(new DirichletFermionF(*DDenominatorsF[h],Block));
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BoundaryNumerators.push_back (new SchurFactoredFermionOperator<DomainWallFermionR::Impl_t>
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(*PeriNumerators[h],
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*DirichletNumerators[h],
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ActionCG,Block));
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BoundaryDenominators.push_back (new SchurFactoredFermionOperator<DomainWallFermionR::Impl_t>
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(*PeriDenominators[h],
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*DirichletDenominators[h],
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ActionCG,Block));
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// Dirichlet Schur even odd MpsDagMpc operators on local domains
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LinOpD.push_back(new LinearOperatorD(*DirichletDenominators[h]));
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LinOpF.push_back(new LinearOperatorF(*DirichletDenominatorsF[h]));
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const int MX_inner = 1000;
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MPCG.push_back(new MxPCG(DerivativeStoppingCondition,
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MX_inner,
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MaxCGIterations,
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GridPtrF,
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FrbGridF,
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*DirichletDenominatorsF[h],*DirichletDenominators[h],
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*LinOpF[h], *LinOpD[h]) );
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ActionMPCG.push_back(new MxPCG(ActionStoppingCondition,
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MX_inner,
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MaxCGIterations,
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GridPtrF,
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FrbGridF,
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*DirichletDenominatorsF[h],*DirichletDenominators[h],
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*LinOpF[h], *LinOpD[h]) );
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////////////////////////////////////////////////////////////////////////////
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// Standard CG for 2f force
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////////////////////////////////////////////////////////////////////////////
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// Quotients.push_back (new TwoFlavourEvenOddRatioPseudoFermionAction<FermionImplPolicy>(*Numerators[h],*Denominators[h],*MPCG[h],*ActionMPCG[h],ActionCG));
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Quotients.push_back (new
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TwoFlavourEvenOddRatioPseudoFermionAction<FermionImplPolicy>
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(*DirichletNumerators[h],
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*DirichletDenominators[h],
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*ActionMPCG[h],
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*ActionMPCG[h],
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ActionCG));
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BoundaryQuotients.push_back(new
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DomainDecomposedBoundaryTwoFlavourRatioPseudoFermion<DomainWallFermionR::Impl_t>
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(*BoundaryNumerators[h],
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*BoundaryDenominators[h],
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ActionCG,ActionCG));
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}
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for(int h=0;h<n_hasenbusch+1;h++){
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Level1.push_back(Quotients[h]);
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Level1.push_back(BoundaryQuotients[h]);
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}
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/////////////////////////////////////////////////////////////
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// Gauge action
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/////////////////////////////////////////////////////////////
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Level2.push_back(&GaugeAction);
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TheHMC.TheAction.push_back(Level1);
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TheHMC.TheAction.push_back(Level2);
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std::cout << GridLogMessage << " Action complete "<< std::endl;
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/////////////////////////////////////////////////////////////
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// HMC parameters are serialisable
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std::cout << GridLogMessage << " Running the HMC "<< std::endl;
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TheHMC.Run(); // no smearing
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Grid_finalize();
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} // main
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