Line data    Source code

       1             : //* This file is part of the MOOSE framework
       2             : //* https://mooseframework.inl.gov
       3             : //*
       4             : //* All rights reserved, see COPYRIGHT for full restrictions
       5             : //* https://github.com/idaholab/moose/blob/master/COPYRIGHT
       6             : //*
       7             : //* Licensed under LGPL 2.1, please see LICENSE for details
       8             : //* https://www.gnu.org/licenses/lgpl-2.1.html
       9             : 
      10             : #ifdef MOOSE_MFEM_ENABLED
      11             : 
      12             : #include "MFEMHypreGMRES.h"
      13             : #include "MFEMProblem.h"
      14             : 
      15             : registerMooseObject("MooseApp", MFEMHypreGMRES);
      16             : 
      17             : InputParameters
      18        9646 : MFEMHypreGMRES::validParams()
      19             : {
      20        9646 :   InputParameters params = MFEMSolverBase::validParams();
      21       19292 :   params.addClassDescription("Hypre solver for the iterative solution of MFEM equation systems "
      22             :                              "using the generalized minimal residual method.");
      23             : 
      24       38584 :   params.addParam<mfem::real_t>("l_tol", 1e-5, "Set the relative tolerance.");
      25       38584 :   params.addParam<mfem::real_t>("l_abs_tol", 1e-50, "Set the absolute tolerance.");
      26       38584 :   params.addParam<int>("l_max_its", 10000, "Set the maximum number of iterations.");
      27       38584 :   params.addParam<int>("kdim", 10, "Set the k-dimension.");
      28       38584 :   params.addParam<int>("print_level", 2, "Set the solver verbosity.");
      29       28938 :   params.addParam<UserObjectName>("preconditioner", "Optional choice of preconditioner to use.");
      30             : 
      31        9646 :   return params;
      32           0 : }
      33             : 
      34         147 : MFEMHypreGMRES::MFEMHypreGMRES(const InputParameters & parameters) : MFEMSolverBase(parameters)
      35             : {
      36         147 :   constructSolver(parameters);
      37         147 : }
      38             : 
      39             : void
      40         147 : MFEMHypreGMRES::constructSolver(const InputParameters &)
      41             : {
      42         147 :   auto solver = std::make_unique<mfem::patched::HypreGMRES>(getMFEMProblem().getComm());
      43         294 :   solver->SetTol(getParam<mfem::real_t>("l_tol"));
      44         294 :   solver->SetAbsTol(getParam<mfem::real_t>("l_abs_tol"));
      45         294 :   solver->SetMaxIter(getParam<int>("l_max_its"));
      46         294 :   solver->SetKDim(getParam<int>("kdim"));
      47         294 :   solver->SetPrintLevel(getParam<int>("print_level"));
      48         147 :   setPreconditioner(*solver);
      49         147 :   _solver = std::move(solver);
      50         147 : }
      51             : 
      52             : void
      53         196 : MFEMHypreGMRES::updateSolver(mfem::ParBilinearForm & a, mfem::Array<int> & tdofs)
      54             : {
      55         196 :   if (_lor && _preconditioner)
      56           0 :     mooseError("LOR solver cannot take a preconditioner");
      57             : 
      58         196 :   if (_preconditioner)
      59             :   {
      60         192 :     _preconditioner->updateSolver(a, tdofs);
      61         192 :     setPreconditioner(static_cast<mfem::HypreGMRES &>(*_solver));
      62             :   }
      63           4 :   else if (_lor)
      64             :   {
      65           2 :     checkSpectralEquivalence(a);
      66           2 :     mfem::ParLORDiscretization lor_disc(a, tdofs);
      67           2 :     auto lor_solver = new mfem::LORSolver<mfem::HypreGMRES>(lor_disc, getMFEMProblem().getComm());
      68           4 :     lor_solver->GetSolver().SetTol(getParam<mfem::real_t>("l_tol"));
      69           4 :     lor_solver->GetSolver().SetAbsTol(getParam<mfem::real_t>("l_abs_tol"));
      70           4 :     lor_solver->GetSolver().SetMaxIter(getParam<int>("l_max_its"));
      71           4 :     lor_solver->GetSolver().SetKDim(getParam<int>("kdim"));
      72           4 :     lor_solver->GetSolver().SetPrintLevel(getParam<int>("print_level"));
      73             : 
      74           2 :     _solver.reset(lor_solver);
      75           2 :   }
      76         196 : }
      77             : 
      78             : #endif