test_Spectrum_CRSMatrix_Domainwall.cpp

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#include "test.h"
 
#include "Fopr/fopr_CRS.h"
#include "Field/field_F.h"
#include "Fopr/fopr_Domainwall.h"
 
#include "IO/gaugeConfig.h"
 
#include "Measurements/Fermion/source.h"
 
#include "Solver/solver_CG.h"
 
//====================================================================
 
namespace Test_Spectrum_CRSMatrix {
  //- test-private parameters
  namespace {
    const std::string filename_input  = "test_Spectrum_CRSMatrix_Domainwall.yaml";
    const std::string filename_output = "stdout";
  }
 
  //- prototype declaration
  int domainwall(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
  //- NB. CRS test is skipped, because it is time-consuming.
#if 0
  namespace {
    static const bool is_registered = TestManager::RegisterTest(
      "Spectrum.CRSMatrix.Domainwall",
      domainwall
      );
  }
#endif
#endif
#endif
 
  //====================================================================
  int domainwall(void)
  {
    // ####  parameter setup  ####
    const int Nc   = CommonParameters::Nc();
    const int Nd   = CommonParameters::Nd();
    const int Nvol = CommonParameters::Nvol();
    const int Ndim = CommonParameters::Ndim();
 
    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  ####
    Field_G     U(Nvol, Ndim);
    GaugeConfig gconf_read(str_gconf_read);
    gconf_read.read_file(U, readfile);
 
 
    // ####  object setup  #####
    const double     mq = 0.1;
    const double     M0 = 1.6;
    const int        Ns = 8;
    std::vector<int> boundary(Ndim);
    boundary[0] = 1;
    boundary[1] = 1;
    boundary[2] = 1;
    boundary[3] = -1;
 
 
    Parameters params_dw;
    params_dw.set_double("quark_mass", mq);
    params_dw.set_double("domain_wall_height", M0);
    params_dw.set_int("extent_of_5th_dimension", Ns);
    params_dw.set_int_vector("boundary_condition", boundary);
 
 
    // Fopr_Wilson fopr_w("Dirac");
    // Fopr_Domainwall *fopr_dw = new Fopr_Domainwall(&fopr_w);
    // fopr_dw->set_parameters(params_dw);
 
    // Fopr_Wilson *fopr_w = new Fopr_Wilson("Dirac");
    // Fopr_Domainwall *fopr_dw = new Fopr_Domainwall(fopr_w, params_dw);
 
    unique_ptr<Fopr_Domainwall> fopr_dw(new Fopr_Domainwall(params_dw));
 
    fopr_dw->set_config(&U);
    fopr_dw->set_mode("D");
 
    unique_ptr<Fopr_CRS> fopr_crs(new Fopr_CRS(fopr_dw.get()));
    fopr_crs->write_matrix(matrix_file);
 
    // std::vector<int> source_position(Ndim);
    // source_position[0] = 0;
    // source_position[1] = 0;
    // source_position[2] = 0;
    // source_position[3] = 0;
    std::vector<int> source_position { 0, 0, 0, 0 };
    Parameters       params_source;
    params_source.set_int_vector("source_position", source_position);
 
    unique_ptr<Source> source(Source::New("Local", params_source));
 
 
    //- CGNE solver
    int    Niter          = 100;
    int    Nrestart       = 40;
    double Stop_cond      = 1.0e-28;
    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_double("use_initial_guess", use_init_guess);
 
    unique_ptr<Solver> solver(new Solver_CG(fopr_dw.get(), params_solver));
 
 
    // ####  Execution main part  ####
    const int Nin = 2 * Nc * Nd;
    const int Nex = Ns;
 
    for (int ispin = 0; ispin < Nd; ++ispin) {
      for (int icolor = 0; icolor < Nc; ++icolor) {
        for (int ch = -1; ch <= 1; ch = ch + 2) {
          int idx = icolor + Nc * ispin;
 
          Field_F b;
          source->set(b, idx);
 
          Field bt(Nin, Nvol, 1);
          fopr_dw->mult_chproj_4d(bt, b, ch);
 
          Field bt_5d(Nin, Nvol, Nex);
          bt_5d.set(0.0);
          if (ch == -1) {
            bt_5d.setpart_ex(Nex - 1, bt, 0);
          } else {
            bt_5d.setpart_ex(0, bt, 0);
          }
 
          //- save the source vector
          write_text(bt_5d, source_file);
 
          Field b_5d(Nin, Nvol, Nex);
          fopr_dw->set_mode("Ddag");
          fopr_dw->mult(b_5d, bt_5d);
 
          vout.general(vl, " b_5d norm2 = %14.6e\n", b_5d.norm2());
 
          Field  xq_5d(Nin, Nvol, Nex);
          int    Nconv;
          double diff;
          fopr_dw->set_mode("DdagD");
          solver->solve(xq_5d, b_5d, Nconv, diff);
          vout.general(vl, "  chirality: %2d\n", ch);
          vout.general(vl, "    Nconv = %d,  diff = %16.8e\n", Nconv, diff);
 
          //- save the solution vector
          write_text(xq_5d, solution_file);
        }
      }
    }
 
    double result = 0.0;
    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