Ejemplos de CSysSolve::BCGSTAB_LinSolver en C++ (Cpp)

Ejemplo n.º 1

Archivo: linear_solvers_structure_b.cpp Proyecto: HolyGeneralK/SU2

void CSysSolve_b::Solve_b(AD::CheckpointHandler* data){
  /*--- Extract data from the checkpoint handler ---*/

  su2double::GradientData *LinSysRes_Indices;
  su2double::GradientData *LinSysSol_Indices;

  data->getData(LinSysRes_Indices);
  data->getData(LinSysSol_Indices);

  unsigned long nBlk, nVar, nBlkDomain, size, i;

  data->getData(size);
  data->getData(nBlk);
  data->getData(nVar);
  data->getData(nBlkDomain);

  CSysMatrix* Jacobian;
  data->getData(Jacobian);

  CGeometry* geometry;
  data->getData(geometry);

  CConfig* config;
  data->getData(config);

  CSysVector LinSysRes_b(nBlk, nBlkDomain, nVar, 0.0);
  CSysVector LinSysSol_b(nBlk, nBlkDomain, nVar, 0.0);
  su2double Residual;

  unsigned long MaxIter = config->GetLinear_Solver_Iter();
  su2double SolverTol = config->GetLinear_Solver_Error();

  /*--- Initialize the right-hand side with the gradient of the solution of the primal linear system ---*/

  for (i = 0; i < size; i ++){
    su2double::GradientData& index = LinSysSol_Indices[i];
    LinSysRes_b[i] = AD::globalTape.getGradient(index);
    LinSysSol_b[i] = 0.0;
    AD::globalTape.gradient(index) = 0.0;
  }
  /*--- Set up preconditioner and matrix-vector product ---*/

  CPreconditioner* precond  = NULL;

  switch(config->GetKind_DiscAdj_Linear_Prec()){
    case ILU:
      precond = new CILUPreconditioner(*Jacobian, geometry, config);
      break;
    case JACOBI:
      precond = new CJacobiPreconditioner(*Jacobian, geometry, config);
      break;
  }

  CMatrixVectorProduct* mat_vec = new CSysMatrixVectorProductTransposed(*Jacobian, geometry, config);

  CSysSolve *solver = new CSysSolve;

  /*--- Solve the system ---*/

  switch(config->GetKind_DiscAdj_Linear_Solver()){
    case FGMRES:
      solver->FGMRES_LinSolver(LinSysRes_b, LinSysSol_b, *mat_vec, *precond, SolverTol , MaxIter, &Residual, false);
      break;
    case BCGSTAB:
      solver->BCGSTAB_LinSolver(LinSysRes_b, LinSysSol_b, *mat_vec, *precond, SolverTol , MaxIter, &Residual, false);
      break;
  }


  /*--- Update the gradients of the right-hand side of the primal linear system ---*/

  for (i = 0; i < size; i ++){
    su2double::GradientData& index = LinSysRes_Indices[i];
    AD::globalTape.gradient(index) += SU2_TYPE::GetValue(LinSysSol_b[i]);
  }

  delete mat_vec;
  delete precond;
  delete solver;
}

Ejemplo n.º 2

Archivo: linear_solvers_structure_b.cpp Proyecto: youmengtian/SU2

void CSysSolve_b::Solve_b(AD::Tape* tape, AD::CheckpointHandler* data) {
  
  /*--- Extract data from the checkpoint handler ---*/

  su2double::GradientData *LinSysRes_Indices;
  su2double::GradientData *LinSysSol_Indices;
#if CODI_PRIMAL_INDEX_TAPE
  su2double::Real *oldValues;
#endif

  data->getData(LinSysRes_Indices);
  data->getData(LinSysSol_Indices);
#if CODI_PRIMAL_INDEX_TAPE
  data->getData(oldValues);
#endif

  unsigned long nBlk = 0, nVar = 0, nBlkDomain = 0, size = 0, i = 0;

  data->getData(size);
  data->getData(nBlk);
  data->getData(nVar);
  data->getData(nBlkDomain);

  CSysMatrix* Jacobian = NULL;
  data->getData(Jacobian);

  CGeometry* geometry  = NULL;
  data->getData(geometry);

  CConfig* config      = NULL;
  data->getData(config);

  CSysVector LinSysRes_b(nBlk, nBlkDomain, nVar, 0.0);
  CSysVector LinSysSol_b(nBlk, nBlkDomain, nVar, 0.0);
  su2double Residual;

  unsigned long MaxIter = config->GetLinear_Solver_Iter();
  su2double SolverTol = config->GetLinear_Solver_Error();

  /*--- Initialize the right-hand side with the gradient of the solution of the primal linear system ---*/

  for (i = 0; i < size; i ++) {
    su2double::GradientData& index = LinSysSol_Indices[i];
    LinSysRes_b[i] = AD::globalTape.getGradient(index);
    LinSysSol_b[i] = 0.0;
    AD::globalTape.gradient(index) = 0.0;
  }
  /*--- Set up preconditioner and matrix-vector product ---*/

  CPreconditioner* precond  = NULL;

  switch(config->GetKind_DiscAdj_Linear_Prec()) {
    case ILU:
      precond = new CILUPreconditioner(*Jacobian, geometry, config);
      break;
    case JACOBI:
      precond = new CJacobiPreconditioner(*Jacobian, geometry, config);
      break;
  }

  CMatrixVectorProduct* mat_vec = new CSysMatrixVectorProductTransposed(*Jacobian, geometry, config);

  CSysSolve *solver = new CSysSolve;

  /*--- Solve the system ---*/

  switch(config->GetKind_DiscAdj_Linear_Solver()) {
    case FGMRES:
      solver->FGMRES_LinSolver(LinSysRes_b, LinSysSol_b, *mat_vec, *precond, SolverTol , MaxIter, &Residual, false);
      break;
    case BCGSTAB:
      solver->BCGSTAB_LinSolver(LinSysRes_b, LinSysSol_b, *mat_vec, *precond, SolverTol , MaxIter, &Residual, false);
      break;
    case CONJUGATE_GRADIENT:
      solver->CG_LinSolver(LinSysRes_b, LinSysSol_b, *mat_vec, *precond, SolverTol, MaxIter, &Residual, false);
      break;
  }


  /*--- Update the gradients of the right-hand side of the primal linear system ---*/

  for (i = 0; i < size; i ++) {
    su2double::GradientData& index = LinSysRes_Indices[i];
    AD::globalTape.gradient(index) += SU2_TYPE::GetValue(LinSysSol_b[i]);
  }

#if CODI_PRIMAL_INDEX_TAPE
  /*--- Set the old values that have been overwritten ---*/
  for (i = 0; i < size; i ++) {
    AD::globalTape.setExternalValueChange(LinSysSol_Indices[i], oldValues[i]);
  }
#endif

  delete mat_vec;
  delete precond;
  delete solver;
}