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Added test for SolutionTransfer with hp-refinement and manually set flags. #14781
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// --------------------------------------------------------------------- | ||
// | ||
// Copyright (C) 2023 by the deal.II authors | ||
// | ||
// This file is part of the deal.II library. | ||
// | ||
// The deal.II library is free software; you can use it, redistribute | ||
// it, and/or modify it under the terms of the GNU Lesser General | ||
// Public License as published by the Free Software Foundation; either | ||
// version 2.1 of the License, or (at your option) any later version. | ||
// The full text of the license can be found in the file LICENSE at | ||
// the top level of the deal.II distribution. | ||
// | ||
// --------------------------------------------------------------------- | ||
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// Test distributed SolutionTransfer with hp-refinement and manually set flags. | ||
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#include <deal.II/distributed/solution_transfer.h> | ||
#include <deal.II/distributed/tria.h> | ||
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#include <deal.II/dofs/dof_handler.h> | ||
#include <deal.II/dofs/dof_tools.h> | ||
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#include <deal.II/fe/fe_q.h> | ||
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#include <deal.II/grid/grid_generator.h> | ||
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#include <deal.II/hp/fe_collection.h> | ||
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#include <deal.II/lac/la_parallel_vector.h> | ||
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#include "../tests.h" | ||
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template <int dim> | ||
void | ||
test() | ||
{ | ||
parallel::distributed::Triangulation<dim> tria(MPI_COMM_WORLD); | ||
GridGenerator::subdivided_hyper_cube(tria, 2); | ||
tria.refine_global(1); | ||
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hp::FECollection<dim> fes; | ||
for (unsigned int d = 1; d <= 3; ++d) | ||
fes.push_back(FE_Q<dim>(d)); | ||
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DoFHandler<dim> dofh(tria); | ||
for (const auto &cell : dofh.active_cell_iterators()) | ||
if (cell->is_locally_owned()) | ||
cell->set_active_fe_index(1); | ||
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dofh.distribute_dofs(fes); | ||
IndexSet locally_owned_dofs = dofh.locally_owned_dofs(); | ||
IndexSet locally_relevant_dofs = | ||
DoFTools::extract_locally_relevant_dofs(dofh); | ||
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// set up solution | ||
LinearAlgebra::distributed::Vector<double> solution; | ||
solution.reinit(locally_owned_dofs, | ||
locally_relevant_dofs, | ||
dofh.get_communicator()); | ||
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for (unsigned int i = 0; i < solution.size(); ++i) | ||
if (locally_owned_dofs.is_element(i)) | ||
solution(i) = i; | ||
solution.update_ghost_values(); | ||
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double l1_norm = solution.l1_norm(); | ||
if (Utilities::MPI::this_mpi_process(dofh.get_communicator()) == 0) | ||
deallog << "pre refinement l1=" << l1_norm << std::endl; | ||
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// set refine/coarsen flags manually | ||
for (const auto &cell : dofh.active_cell_iterators()) | ||
if (cell->is_locally_owned()) | ||
{ | ||
const std::string parent_id_string = cell->parent()->id().to_string(); | ||
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if (parent_id_string == "0_0:") | ||
{ | ||
// parent 0: h refinement | ||
cell->set_refine_flag(); | ||
} | ||
else if (parent_id_string == "1_0:") | ||
{ | ||
// parent 1: h coarsening | ||
cell->set_coarsen_flag(); | ||
} | ||
else if (parent_id_string == "2_0:") | ||
{ | ||
// parent 2: p refinement | ||
const auto super_fe_index = | ||
fes.next_in_hierarchy(cell->active_fe_index()); | ||
cell->set_future_fe_index(super_fe_index); | ||
} | ||
else if (parent_id_string == "3_0:") | ||
{ | ||
// parent 3: p coarsening | ||
const auto sub_fe_index = | ||
fes.previous_in_hierarchy(cell->active_fe_index()); | ||
cell->set_future_fe_index(sub_fe_index); | ||
} | ||
else | ||
{ | ||
Assert(false, ExcInternalError()); | ||
} | ||
} | ||
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// initiate refinement and transfer | ||
parallel::distributed:: | ||
SolutionTransfer<dim, LinearAlgebra::distributed::Vector<double>> | ||
soltrans(dofh); | ||
soltrans.prepare_for_coarsening_and_refinement(solution); | ||
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tria.execute_coarsening_and_refinement(); | ||
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dofh.distribute_dofs(fes); | ||
locally_owned_dofs = dofh.locally_owned_dofs(); | ||
locally_relevant_dofs = DoFTools::extract_locally_relevant_dofs(dofh); | ||
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solution.reinit(locally_owned_dofs, | ||
locally_relevant_dofs, | ||
dofh.get_communicator()); | ||
soltrans.interpolate(solution); | ||
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l1_norm = solution.l1_norm(); | ||
if (Utilities::MPI::this_mpi_process(dofh.get_communicator()) == 0) | ||
deallog << "post refinement l1=" << l1_norm << std::endl; | ||
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// make sure no processor is hanging | ||
MPI_Barrier(MPI_COMM_WORLD); | ||
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deallog << "OK" << std::endl; | ||
} | ||
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int | ||
main(int argc, char **argv) | ||
{ | ||
Utilities::MPI::MPI_InitFinalize mpi_initialization(argc, argv, 1); | ||
MPILogInitAll log; | ||
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test<2>(); | ||
} |
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DEAL:0::pre refinement l1=3240.00 | ||
DEAL:0::post refinement l1=4390.76 | ||
DEAL:0::OK | ||
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DEAL:1::OK | ||
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This is the end of the test. Would it make sense to compute some diagnostic information from the so-interpolated vector? Say its l1 norm or some something one could output? Right now, all you test is that the test doesn't abort.
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I've added the output of the l1 norm pre and post refinement.
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Great, thanks!