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Grid/tests/hmc/Test_hmc_GparityIwasakiGauge.cc

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/*************************************************************************************
Grid physics library, www.github.com/paboyle/Grid
Source file: ./tests/Test_hmc_GparityIwasakiGauge.cc
Copyright (C) 2015
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 */
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#include <Grid/Grid.h>
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int main(int argc, char **argv) {
using namespace Grid;
;
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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;
// Typedefs to simplify notation
typedef ConjugateHMCRunner<MinimumNorm2> HMCWrapper; // Uses the default minimum norm
typedef GparityWilsonImplR FermionImplPolicy;
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typedef GparityDomainWallFermionD FermionAction;
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typedef typename FermionAction::FermionField FermionField;
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//::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
HMCWrapper TheHMC;
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// Grid from the command line
TheHMC.Resources.AddFourDimGrid("gauge");
// Possibile to create the module by hand
// hardcoding parameters or using a Reader
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// Checkpointer definition
CheckpointerParameters CPparams;
CPparams.config_prefix = "ckpoint_EODWF_lat";
CPparams.rng_prefix = "ckpoint_EODWF_rng";
Imported changes from feature/gparity_HMC branch: Added a bounds-check function for the RHMC with arbitrary power Added a pseudofermion action for the rational ratio with an arbitrary power and a mixed-precision variant of the same. The existing one-flavor rational ratio class now uses the general class under the hood To support testing of the two-flavor even-odd ratio pseudofermion, separated the functionality of generating the random field and performing the heatbath step, and added a method to obtain the pseudofermion field Added a new HMC runner start type: CheckpointStartReseed, which reseeds the RNG from scratch, allowing for the creation of new evolution streams from an existing checkpoint. Added log output of seeds used when the RNG is seeded. EOFA changes: To support mixed-precision inversion, generalized the class to maintain a separate solver for the L and R operators in the heatbath (separate solvers are already implemented for the other stages) To support mixed-precision, the action of setting the operator shift coefficients is now maintained in a virtual function. A derived class for mixed-precision solvers ensures the coefficients are applied to both the double and single-prec operators The ||^2 of the random source is now stored by the heatbath and compared to the initial action when it is computed. These should be equal but may differ if the rational bounds are not chosen correctly, hence serving as a useful and free test Fixed calculation of M_eofa (previously incomplete and #if'd out) Added functionality to compute M_eofa^-1 to complement the calculation of M_eofa (both are equally expensive!) To support testing, separated the functionality of generating the random field and performing the heatbath step, and added a method to obtain the pseudofermion field Added a test program which computes the G-parity force using the 1 and 2 flavor implementations and compares the result. Test supports DWF, EOFA and DSDR actions, chosen by a command line option. The Mobius EOFA force test now also checks the rational approximation used for the heatbath Added a test program for the mixed precision EOFA compared to the double-prec implementation, G-parity HMC test now applied GPBC in the y direction and not the t direction (GPBC in t are no longer supported) and checkpoints after every configuration Added a test program which computes the two-flavor G-parity action (via RHMC) with both the 1 and 2 flavor implementations and checks they agree Added a test program to check the implementation of M_eofa^{-1}
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CPparams.saveInterval = 1;
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CPparams.format = "IEEE64BIG";
TheHMC.Resources.LoadNerscCheckpointer(CPparams);
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RNGModuleParameters RNGpar;
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RNGpar.serial_seeds = "1 2 3 4 5";
RNGpar.parallel_seeds = "6 7 8 9 10";
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TheHMC.Resources.SetRNGSeeds(RNGpar);
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// Construct observables
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typedef PlaquetteMod<HMCWrapper::ImplPolicy> PlaqObs;
TheHMC.Resources.AddObservable<PlaqObs>();
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//////////////////////////////////////////////
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/////////////////////////////////////////////////////////////
// Collect actions, here use more encapsulation
// need wrappers of the fermionic classes
// that have a complex construction
// standard
RealD beta = 2.6 ;
Imported changes from feature/gparity_HMC branch: Added a bounds-check function for the RHMC with arbitrary power Added a pseudofermion action for the rational ratio with an arbitrary power and a mixed-precision variant of the same. The existing one-flavor rational ratio class now uses the general class under the hood To support testing of the two-flavor even-odd ratio pseudofermion, separated the functionality of generating the random field and performing the heatbath step, and added a method to obtain the pseudofermion field Added a new HMC runner start type: CheckpointStartReseed, which reseeds the RNG from scratch, allowing for the creation of new evolution streams from an existing checkpoint. Added log output of seeds used when the RNG is seeded. EOFA changes: To support mixed-precision inversion, generalized the class to maintain a separate solver for the L and R operators in the heatbath (separate solvers are already implemented for the other stages) To support mixed-precision, the action of setting the operator shift coefficients is now maintained in a virtual function. A derived class for mixed-precision solvers ensures the coefficients are applied to both the double and single-prec operators The ||^2 of the random source is now stored by the heatbath and compared to the initial action when it is computed. These should be equal but may differ if the rational bounds are not chosen correctly, hence serving as a useful and free test Fixed calculation of M_eofa (previously incomplete and #if'd out) Added functionality to compute M_eofa^-1 to complement the calculation of M_eofa (both are equally expensive!) To support testing, separated the functionality of generating the random field and performing the heatbath step, and added a method to obtain the pseudofermion field Added a test program which computes the G-parity force using the 1 and 2 flavor implementations and compares the result. Test supports DWF, EOFA and DSDR actions, chosen by a command line option. The Mobius EOFA force test now also checks the rational approximation used for the heatbath Added a test program for the mixed precision EOFA compared to the double-prec implementation, G-parity HMC test now applied GPBC in the y direction and not the t direction (GPBC in t are no longer supported) and checkpoints after every configuration Added a test program which computes the two-flavor G-parity action (via RHMC) with both the 1 and 2 flavor implementations and checks they agree Added a test program to check the implementation of M_eofa^{-1}
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const int nu = 1;
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std::vector<int> twists(Nd,0);
twists[nu] = 1;
ConjugateGimplD::setDirections(twists);
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ConjugateIwasakiGaugeActionR Waction(beta);
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// Collect actions
ActionLevel<HMCWrapper::Field> Level1(1);
Level1.push_back(&Waction);
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TheHMC.TheAction.push_back(Level1);
/////////////////////////////////////////////////////////////
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// HMC parameters are serialisable
TheHMC.Parameters.MD.MDsteps = 20;
TheHMC.Parameters.MD.trajL = 1.0;
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TheHMC.ReadCommandLine(argc, argv); // these can be parameters from file
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TheHMC.Run(); // no smearing
Grid_finalize();
} // main