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	Exposing support for Ncolours and Ndimensions and JSON input file for the ScalarAction
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		@@ -32,68 +32,116 @@ class ScalarActionParameters : Serializable {
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  GRID_SERIALIZABLE_CLASS_MEMBERS(ScalarActionParameters,
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    double, mass_squared,
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    double, lambda);
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    template <class ReaderClass >
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  ScalarActionParameters(Reader<ReaderClass>& Reader){
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    read(Reader, "ScalarAction", *this);
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  }
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};
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}
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int main(int argc, char **argv) {
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  using namespace Grid;
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  using namespace Grid::QCD;
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  typedef Grid::JSONReader       Serialiser;
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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 ScalarAdjGenericHMCRunner HMCWrapper;  // Uses the default minimum norm, real scalar fields
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  constexpr int Ncolours    = 4;
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  constexpr int Ndimensions = 3;
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  typedef ScalarNxNAdjGenericHMCRunner<Ncolours> HMCWrapper;  // Uses the default minimum norm, real scalar fields
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  typedef ScalarAdjActionR<Ncolours, Ndimensions> ScalarAction;
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  //::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
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  HMCWrapper TheHMC;
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  TheHMC.ReadCommandLine(argc, argv);
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  if (TheHMC.ParameterFile.empty()){
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    std::cout << "Input file not specified."
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              << "Use --ParameterFile option in the command line.\nAborting" 
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              << std::endl;
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    exit(1);
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  }
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  Serialiser Reader(TheHMC.ParameterFile);
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  // Grid from the command line
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  GridModule ScalarGrid;
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  ScalarGrid.set_full(SpaceTimeGrid::makeFourDimGrid(
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        GridDefaultLatt(), GridDefaultSimd(Nd, vComplex::Nsimd()),
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        GridDefaultMpi()));
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  ScalarGrid.set_rb(SpaceTimeGrid::makeFourDimRedBlackGrid(ScalarGrid.get_full()));
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  if (GridDefaultLatt().size() != Ndimensions){
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    std::cout << "Incorrect dimension of the grid\n. Expected dim="<< Ndimensions << std::endl;
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    exit(1);
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  }
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  if (GridDefaultMpi().size() != Ndimensions){
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    std::cout << "Incorrect dimension of the mpi grid\n. Expected dim="<< Ndimensions << std::endl;
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    exit(1);
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  }
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  ScalarGrid.set_full(new GridCartesian(GridDefaultLatt(),GridDefaultSimd(Ndimensions, vComplex::Nsimd()),GridDefaultMpi()));
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  ScalarGrid.set_rb(new GridRedBlackCartesian(ScalarGrid.get_full()));
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  TheHMC.Resources.AddGrid("scalar", ScalarGrid);
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  // Possibile to create the module by hand
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  // hardcoding parameters or using a Reader
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  std::cout << "Lattice size : " << GridDefaultLatt() << std::endl;
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  // Checkpointer definition
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  CheckpointerParameters CPparams;
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  CPparams.config_prefix = "ckpoint_scalar_lat";
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  CPparams.rng_prefix = "ckpoint_scalar_rng";
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  CPparams.saveInterval = 50;
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  CPparams.format = "IEEE64BIG";
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  CheckpointerParameters CPparams(Reader);
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  TheHMC.Resources.LoadBinaryCheckpointer(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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  RNGModuleParameters RNGpar(Reader);
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  TheHMC.Resources.SetRNGSeeds(RNGpar);
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  /////////////////////////////////////////////////////////////
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  // Collect actions, here use more encapsulation
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  // Scalar action in adjoint representation
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  ScalarActionParameters SPar;
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  SPar.mass_squared = 0.5;
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  SPar.lambda       = 0.1;
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  ScalarAdjActionR Saction(SPar.mass_squared, SPar.lambda);
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  ScalarActionParameters SPar(Reader);
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  ScalarAction Saction(SPar.mass_squared, SPar.lambda);
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  // Collect actions
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  ActionLevel<ScalarAdjActionR::Field, ScalarMatrixFields> Level1(1);
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  ActionLevel<ScalarAction::Field, ScalarNxNMatrixFields<Ncolours>> Level1(1);
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  Level1.push_back(&Saction);
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  TheHMC.TheAction.push_back(Level1);
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  /////////////////////////////////////////////////////////////
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  TheHMC.Parameters.initialize(Reader);
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  // HMC parameters are serialisable
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  TheHMC.Parameters.MD.MDsteps = 20;
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  TheHMC.Parameters.MD.trajL   = 1.0;
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  TheHMC.ReadCommandLine(argc, argv);
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  TheHMC.Run();
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  Grid_finalize();
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}  // main
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/* Examples for input files
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JSON
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{
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    "Checkpointer": {
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    "config_prefix": "ckpoint_scalar_lat",
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    "rng_prefix": "ckpoint_scalar_rng",
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    "saveInterval": 1,
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    "format": "IEEE64BIG"
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    },
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    "RandomNumberGenerator": {
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    "serial_seeds": "1 2 3 4 6",
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    "parallel_seeds": "6 7 8 9 11"
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    },
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    "ScalarAction":{
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      "mass_squared": 0.5,
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      "lambda": 0.1
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    },
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    "HMC":{
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    "StartTrajectory": 0,
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    "Trajectories": 100,
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    "MetropolisTest": true,
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    "NoMetropolisUntil": 10,
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    "StartingType": "HotStart",
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    "MD":{
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        "name": "MinimumNorm2",
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	      "MDsteps": 15,
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	      "trajL": 2.0
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	    }
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    }
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}
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XML example not provided yet
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*/
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