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 MFEM_ENABLED
      11             : 
      12             : #include "MFEMHypreFGMRES.h"
      13             : #include "MFEMProblem.h"
      14             : 
      15             : registerMooseObject("MooseApp", MFEMHypreFGMRES);
      16             : 
      17             : InputParameters
      18        8634 : MFEMHypreFGMRES::validParams()
      19             : {
      20        8634 :   InputParameters params = MFEMSolverBase::validParams();
      21        8634 :   params.addClassDescription("Hypre solver for the iterative solution of MFEM equation systems "
      22             :                              "using the flexible generalized minimal residual method.");
      23        8634 :   params.addParam<mfem::real_t>("l_tol", 1e-5, "Set the relative tolerance.");
      24        8634 :   params.addParam<int>("l_max_its", 10000, "Set the maximum number of iterations.");
      25        8634 :   params.addParam<int>("kdim", 10, "Set the k-dimension.");
      26        8634 :   params.addParam<int>("print_level", 2, "Set the solver verbosity.");
      27        8634 :   params.addParam<UserObjectName>("preconditioner", "Optional choice of preconditioner to use.");
      28             : 
      29        8634 :   return params;
      30           0 : }
      31             : 
      32           2 : MFEMHypreFGMRES::MFEMHypreFGMRES(const InputParameters & parameters) : MFEMSolverBase(parameters)
      33             : {
      34           2 :   constructSolver(parameters);
      35           2 : }
      36             : 
      37             : void
      38           2 : MFEMHypreFGMRES::constructSolver(const InputParameters &)
      39             : {
      40             :   auto solver =
      41           2 :       std::make_unique<mfem::HypreFGMRES>(getMFEMProblem().mesh().getMFEMParMesh().GetComm());
      42           2 :   solver->SetTol(getParam<mfem::real_t>("l_tol"));
      43           2 :   solver->SetMaxIter(getParam<int>("l_max_its"));
      44           2 :   solver->SetKDim(getParam<int>("kdim"));
      45           2 :   solver->SetPrintLevel(getParam<int>("print_level"));
      46           2 :   setPreconditioner(*solver);
      47           2 :   _solver = std::move(solver);
      48           2 : }
      49             : 
      50             : void
      51           2 : MFEMHypreFGMRES::updateSolver(mfem::ParBilinearForm & a, mfem::Array<int> & tdofs)
      52             : {
      53           2 :   if (_lor && _preconditioner)
      54           0 :     mooseError("LOR solver cannot take a preconditioner");
      55             : 
      56           2 :   if (_preconditioner)
      57             :   {
      58           0 :     _preconditioner->updateSolver(a, tdofs);
      59           0 :     setPreconditioner(static_cast<mfem::HypreFGMRES &>(*_solver));
      60             :   }
      61           2 :   else if (_lor)
      62             :   {
      63           1 :     if (!checkSpectralEquivalence(a))
      64           0 :       mooseError("Low-Order-Refined solver requires the FESpace closed_basis to be GaussLobatto "
      65             :                  "and the open-basis to be IntegratedGLL for ND and RT elements.");
      66             : 
      67           1 :     mfem::ParLORDiscretization lor_disc(a, tdofs);
      68             :     auto lor_solver = new mfem::LORSolver<mfem::HypreFGMRES>(
      69           1 :         lor_disc, getMFEMProblem().mesh().getMFEMParMesh().GetComm());
      70           1 :     lor_solver->GetSolver().SetTol(getParam<mfem::real_t>("l_tol"));
      71           1 :     lor_solver->GetSolver().SetMaxIter(getParam<int>("l_max_its"));
      72           1 :     lor_solver->GetSolver().SetKDim(getParam<int>("kdim"));
      73           1 :     lor_solver->GetSolver().SetPrintLevel(getParam<int>("print_level"));
      74             : 
      75           1 :     _solver.reset(lor_solver);
      76           1 :   }
      77           2 : }
      78             : 
      79             : #endif