test_Spectrum_CRSMatrix_Clover_Lexical.cpp

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#include "test.h"

#include "Fopr/fopr_CRS.h"
#include "Fopr/fopr_Clover.h"

#include "Measurements/Fermion/source.h"

#include "Solver/solver_CG.h"

#include "IO/gaugeConfig.h"

//====================================================================

namespace Test_Spectrum_CRSMatrix {
  //- test-private parameters
  namespace {
    const std::string filename_input = "test_Spectrum_CRSMatrix_Clover_Lexical.yaml";
  }

  //- prototype declaration
  int clover_lex(void);

  int CRSsolver(
    const string& solution,
    const string& matrix,
    const string& source,
    double& result       /* return value */
    );

  void write_text(const Field& f, const string& filename);
  void read_text(Field& f, const string& filename);


#ifdef USE_TESTMANAGER_AUTOREGISTER
#ifdef USE_MPI
  // this test runs only in single-node environment.
#else
  namespace {
#if defined(USE_GROUP_SU2)
    // Nc=2 is not available.
#else
    static const bool is_registered = TestManager::RegisterTest(
      "Spectrum.CRSMatrix.Clover_Lexical",
      clover_lex
      );
#endif
  }
#endif
#endif

  //====================================================================
  int clover_lex(void)
  {
    if (CommonParameters::NPE() > 1) {
      // run in parallel: unsupported.
      vout.general("CRSMatrix test: node-parallel unsupported. skip.\n");
      return EXIT_SKIP;
    }

    // ####  parameter setup  ####
    const int Nc   = CommonParameters::Nc();
    const int Nd   = CommonParameters::Nd();
    const int Ndim = CommonParameters::Ndim();
    const int Nvol = CommonParameters::Nvol();

    const Parameters params_all = ParameterManager::read(filename_input);

    const Parameters params_test = params_all.lookup("Test_Spectrum_CRSMatrix");

    const string str_gconf_read = params_test.get_string("gauge_config_type_input");
    const string readfile       = params_test.get_string("config_filename_input");
    const string matrix_file    = params_test.get_string("matrix_output");
    const string source_file    = params_test.get_string("source_output");
    const string solution_file  = params_test.get_string("solution_output");
    const string str_vlevel     = params_test.get_string("verbose_level");

    const bool   do_check        = params_test.is_set("expected_result");
    const double expected_result = do_check ? params_test.get_double("expected_result") : 0.0;

    const Bridge::VerboseLevel vl = vout.set_verbose_level(str_vlevel);

    //- print input parameters
    vout.general(vl, "  gconf_read      = %s\n", str_gconf_read.c_str());
    vout.general(vl, "  readfile        = %s\n", readfile.c_str());
    vout.general(vl, "  matrix_output   = %s\n", matrix_file.c_str());
    vout.general(vl, "  source_output   = %s\n", source_file.c_str());
    vout.general(vl, "  solution_output = %s\n", solution_file.c_str());
    vout.general(vl, "  vlevel          = %s\n", str_vlevel.c_str());
    vout.general(vl, "\n");

    //- input parameter check
    int err = 0;
    err += ParameterCheck::non_NULL(str_gconf_read);
    err += ParameterCheck::non_NULL(readfile);
    err += ParameterCheck::non_NULL(matrix_file);
    err += ParameterCheck::non_NULL(source_file);
    err += ParameterCheck::non_NULL(solution_file);

    if (err) {
      vout.crucial(vl, "Error: Test_Spectrum_CRSMatrix: input parameters have not been set\n");
      exit(EXIT_FAILURE);
    }


    // ####  Set up a gauge configuration  ####
    unique_ptr<Field_G>           U(new Field_G(Nvol, Ndim));
    const unique_ptr<GaugeConfig> gconf_read(new GaugeConfig(str_gconf_read));
    gconf_read->read_file(U, readfile);


    // ####  object setup  #####
    const double     kappa = 0.12;
    const double     cSW   = 1.0;
    std::vector<int> boundary(Ndim);
    boundary[0] = -1;
    boundary[1] = -1;
    boundary[2] = -1;
    boundary[3] = -1;

    Parameters params_c;
    params_c.set_double("hopping_parameter", kappa);
    params_c.set_double("clover_coefficient", cSW);
    params_c.set_int_vector("boundary_condition", boundary);
    params_c.set_string("verbose_level", str_vlevel.c_str());

    unique_ptr<Fopr> fopr_c(Fopr::New("Clover", "Dirac"));
    fopr_c->set_parameters(params_c);
    fopr_c->set_config(U);
    fopr_c->set_mode("D");

    const unique_ptr<Fopr_CRS> fopr_crs(new Fopr_CRS(fopr_c.get()));
    fopr_crs->write_matrix(matrix_file);

    const int    Niter          = 100;
    const int    Nrestart       = 40;
    const double Stop_cond      = 1.0e-28;
    const bool   use_init_guess = false;

    Parameters params_solver;
    params_solver.set_int("maximum_number_of_iteration", Niter);
    params_solver.set_int("maximum_number_of_restart", Nrestart);
    params_solver.set_double("convergence_criterion_squared", Stop_cond);
    params_solver.set_bool("use_initial_guess", use_init_guess);
    params_solver.set_string("verbose_level", str_vlevel.c_str());

    const unique_ptr<Solver> solver(new Solver_CG(fopr_c));
    solver->set_parameters(params_solver);

    std::vector<int> source_position(Ndim);
    source_position[0] = 0;
    source_position[1] = 0;
    source_position[2] = 0;
    source_position[3] = 0;

    const unique_ptr<Source> source(Source::New("Local"));
    Parameters               params_source;
    params_source.set_int_vector("source_position", source_position);
    params_source.set_string("verbose_level", str_vlevel.c_str());
    source->set_parameters(params_source);


    // ####  Execution main part  ####
    std::vector<Field_F> sq(Nc * Nd);
    for (int idx = 0; idx < Nc * Nd; ++idx) {
      sq[idx].set(0.0);
    }

    for (int ispin = 0; ispin < Nd; ++ispin) {
      for (int icolor = 0; icolor < Nc; ++icolor) {
        int idx = icolor + Nc * ispin;

        Field_F b;
        source->set(b, idx);

        write_text(b, source_file.c_str());

        Field_F b2;
        fopr_c->set_mode("D");
        fopr_c->mult_dag(b2, b);

        Field_F xq;
        int     Nconv;
        double  diff_CG;
        fopr_c->set_mode("DdagD");
        solver->solve(xq, b2, Nconv, diff_CG);
        vout.general(vl, "  ispin = %2d  icolor = %2d  Nconv = %4d  diff = %12.6e\n",
                     ispin, icolor, Nconv, diff_CG);

        write_text(xq, solution_file.c_str());

        Field y(b);
        fopr_c->set_mode("D");
        fopr_c->mult(y, xq);
        axpy(y, -1.0, b); // y -= b;
        scal(y, -1.0);    //y *= -1.0;

        double yy = y.norm2();
        vout.general(vl, "    standard norm2 = %.8e\n", yy);

        sq[icolor + Nc * ispin] = xq;
      }
    }

#if 0
    // ### Solver for CRS version ###
    unique_ptr<Solver> solver_crs(new Solver_CG(fopr_crs2));
    solver_crs->set_parameters(Niter, Stop_cond);

    double yy = 0.0L;
    {
      const int ispin = 0;
      {
        const int icolor = 0;
        //for(int ispin = 0; ispin < Nd; ++ispin){
        // for(int icolor = 0; icolor < Nc; ++icolor){

        source->set(b, icolor, ispin);

        fopr_crs2->set_mode("Ddag");
        b2 = (Field_F)fopr_crs2->mult((Field)b);

        int    Nconv;
        double diff_CG;
        fopr_crs2->set_mode("DdagD");
        solver_crs->solve(xq, b2, Nconv, diff_CG);
        vout.general(vl, "  ispin = %2d  icolor = %2d  Nconv = %4d  diff = %12.6e\n",
                     ispin, icolor, Nconv, diff_CG);

        Field_F y(b);
        fopr_crs2->set_mode("D");
        y -= (Field_F)fopr_crs2->mult((Field)xq);
        yy = y.norm2();
        vout.general(vl, "    standard norm2 = %.8e\n", yy);

        sq[icolor + Nc * ispin] = xq;
      }
    }
#endif


    double result;
    CRSsolver(solution_file, matrix_file, source_file, result);


    if (do_check) {
      return Test::verify(result, expected_result);
    } else {
      vout.detailed(vl, "check skipped: expected_result not set.\n\n");
      return EXIT_SKIP;
    }
  }
} // namespace Test_Spectrum_CRSMatrix