From: Peter Munch Date: Fri, 25 Sep 2020 06:40:05 +0000 (+0200) Subject: Enable MGTwoLevelTransfer for FESystem X-Git-Tag: v9.3.0-rc1~1063^2 X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=fd5863c7d938f0860e1f1251e46aeb7040c3c262;p=dealii.git Enable MGTwoLevelTransfer for FESystem --- diff --git a/include/deal.II/multigrid/mg_transfer_global_coarsening.h b/include/deal.II/multigrid/mg_transfer_global_coarsening.h index 7cb12faa55..ce75df0fd5 100644 --- a/include/deal.II/multigrid/mg_transfer_global_coarsening.h +++ b/include/deal.II/multigrid/mg_transfer_global_coarsening.h @@ -227,6 +227,11 @@ private: */ AffineConstraints constraint_coarse; + /** + * Number of components. + */ + unsigned int n_components; + friend class internal::MGTwoLevelTransferImplementation; }; diff --git a/include/deal.II/multigrid/mg_transfer_global_coarsening.templates.h b/include/deal.II/multigrid/mg_transfer_global_coarsening.templates.h index 23b63274e6..5d4cab9ddb 100644 --- a/include/deal.II/multigrid/mg_transfer_global_coarsening.templates.h +++ b/include/deal.II/multigrid/mg_transfer_global_coarsening.templates.h @@ -874,6 +874,16 @@ namespace internal // copy constrain matrix; TODO: why only for the coarse level? transfer.constraint_coarse.copy_from(constraint_coarse); + // make sure that no hp is used + AssertDimension(dof_handler_coarse.get_fe_collection().size(), 1); + AssertDimension(dof_handler_fine.get_fe_collection().size(), 1); + + // extract number of components + AssertDimension(dof_handler_fine.get_fe().n_components(), + dof_handler_coarse.get_fe().n_components()); + + transfer.n_components = dof_handler_fine.get_fe().n_components(); + // create partitioners and vectors for internal purposes { // ... for fine mesh @@ -1264,6 +1274,13 @@ namespace internal AssertDimension(dof_handler_fine.get_triangulation().n_active_cells(), dof_handler_coarse.get_triangulation().n_active_cells()); + // extract number of components + AssertDimension(dof_handler_fine.get_fe_collection().n_components(), + dof_handler_coarse.get_fe_collection().n_components()); + + transfer.n_components = + dof_handler_fine.get_fe_collection().n_components(); + const auto process_cells = [&](const auto &fu) { typename MeshType::active_cell_iterator // cell_coarse = dof_handler_coarse.begin_active(), // @@ -1615,7 +1632,9 @@ MGTwoLevelTransfer>::prolongate( LinearAlgebra::distributed::Vector & dst, const LinearAlgebra::distributed::Vector &src) const { - const unsigned int vec_size = VectorizedArray::n_array_elements; + using VectorizedArrayType = VectorizedArray; + + const unsigned int n_lanes = VectorizedArrayType::size(); this->vec_coarse.copy_locally_owned_data_from(src); this->vec_coarse.update_ghost_values(); @@ -1625,33 +1644,34 @@ MGTwoLevelTransfer>::prolongate( this->vec_fine = Number(0.); + AlignedVector evaluation_data_fine; + AlignedVector evaluation_data_coarse; + for (const auto &scheme : schemes) { - AlignedVector> evaluation_data_fine( - scheme.dofs_per_cell_fine); - AlignedVector> evaluation_data_coarse( - scheme.dofs_per_cell_fine); - - CellProlongator> cell_prolongator( - scheme.prolongation_matrix_1d, - evaluation_data_coarse.begin(), - evaluation_data_fine.begin()); + evaluation_data_fine.resize(scheme.dofs_per_cell_fine); + evaluation_data_coarse.resize(scheme.dofs_per_cell_fine); + CellTransfer cell_transfer(scheme.degree_fine, scheme.degree_coarse); - for (unsigned int cell = 0; cell < scheme.n_coarse_cells; - cell += vec_size) + const unsigned int n_scalar_dofs_fine = + Utilities::pow(scheme.degree_fine + 1, dim); + const unsigned int n_scalar_dofs_coarse = + Utilities::pow(scheme.degree_coarse + 1, dim); + + for (unsigned int cell = 0; cell < scheme.n_coarse_cells; cell += n_lanes) { - const unsigned int n_lanes = - (cell + vec_size > scheme.n_coarse_cells) ? + const unsigned int n_lanes_filled = + (cell + n_lanes > scheme.n_coarse_cells) ? (scheme.n_coarse_cells - cell) : - vec_size; + n_lanes; // read from source vector { const unsigned int *indices = &scheme .level_dof_indices_coarse[cell * scheme.dofs_per_cell_coarse]; - for (unsigned int v = 0; v < n_lanes; ++v) + for (unsigned int v = 0; v < n_lanes_filled; ++v) { for (unsigned int i = 0; i < scheme.dofs_per_cell_coarse; ++i) evaluation_data_coarse[i][v] = @@ -1661,14 +1681,22 @@ MGTwoLevelTransfer>::prolongate( } // ---------------------------- coarse ----------------------------- - cell_transfer.run(cell_prolongator); + for (int c = n_components - 1; c >= 0; --c) + { + CellProlongator cell_prolongator( + scheme.prolongation_matrix_1d, + evaluation_data_coarse.begin() + c * n_scalar_dofs_coarse, + evaluation_data_fine.begin() + c * n_scalar_dofs_fine); + + cell_transfer.run(cell_prolongator); + } // ------------------------------ fine ----------------------------- if (scheme.fine_element_is_continuous) { const Number *w = &scheme.weights[cell * scheme.dofs_per_cell_fine]; - for (unsigned int v = 0; v < n_lanes; ++v) + for (unsigned int v = 0; v < n_lanes_filled; ++v) { for (unsigned int i = 0; i < scheme.dofs_per_cell_fine; ++i) evaluation_data_fine[i][v] *= w[i]; @@ -1681,7 +1709,7 @@ MGTwoLevelTransfer>::prolongate( { const unsigned int *indices = &scheme.level_dof_indices_fine[cell * scheme.dofs_per_cell_fine]; - for (unsigned int v = 0; v < n_lanes; ++v) + for (unsigned int v = 0; v < n_lanes_filled; ++v) { for (unsigned int i = 0; i < scheme.dofs_per_cell_fine; ++i) this->vec_fine.local_element(indices[i]) += @@ -1709,39 +1737,42 @@ MGTwoLevelTransfer>:: restrict_and_add(LinearAlgebra::distributed::Vector & dst, const LinearAlgebra::distributed::Vector &src) const { - const unsigned int vec_size = VectorizedArray::n_array_elements; + using VectorizedArrayType = VectorizedArray; + + const unsigned int n_lanes = VectorizedArrayType::size(); this->vec_fine.copy_locally_owned_data_from(src); this->vec_fine.update_ghost_values(); this->vec_coarse.copy_locally_owned_data_from(dst); + AlignedVector evaluation_data_fine; + AlignedVector evaluation_data_coarse; + for (const auto &scheme : schemes) { - AlignedVector> evaluation_data_fine( - scheme.dofs_per_cell_fine); - AlignedVector> evaluation_data_coarse( - scheme.dofs_per_cell_fine); - - CellRestrictor> cell_restrictor( - scheme.prolongation_matrix_1d, - evaluation_data_fine.begin(), - evaluation_data_coarse.begin()); + evaluation_data_fine.resize(scheme.dofs_per_cell_fine); + evaluation_data_coarse.resize(scheme.dofs_per_cell_fine); + CellTransfer cell_transfer(scheme.degree_fine, scheme.degree_coarse); - for (unsigned int cell = 0; cell < scheme.n_coarse_cells; - cell += vec_size) + const unsigned int n_scalar_dofs_fine = + Utilities::pow(scheme.degree_fine + 1, dim); + const unsigned int n_scalar_dofs_coarse = + Utilities::pow(scheme.degree_coarse + 1, dim); + + for (unsigned int cell = 0; cell < scheme.n_coarse_cells; cell += n_lanes) { - const unsigned int n_lanes = - (cell + vec_size > scheme.n_coarse_cells) ? + const unsigned int n_lanes_filled = + (cell + n_lanes > scheme.n_coarse_cells) ? (scheme.n_coarse_cells - cell) : - vec_size; + n_lanes; // read from source vector { const unsigned int *indices = &scheme.level_dof_indices_fine[cell * scheme.dofs_per_cell_fine]; - for (unsigned int v = 0; v < n_lanes; ++v) + for (unsigned int v = 0; v < n_lanes_filled; ++v) { for (unsigned int i = 0; i < scheme.dofs_per_cell_fine; ++i) evaluation_data_fine[i][v] = @@ -1754,7 +1785,7 @@ MGTwoLevelTransfer>:: { const Number *w = &scheme.weights[cell * scheme.dofs_per_cell_fine]; - for (unsigned int v = 0; v < n_lanes; ++v) + for (unsigned int v = 0; v < n_lanes_filled; ++v) { for (unsigned int i = 0; i < scheme.dofs_per_cell_fine; ++i) evaluation_data_fine[i][v] *= w[i]; @@ -1763,7 +1794,15 @@ MGTwoLevelTransfer>:: } // ------------------------------ fine ----------------------------- - cell_transfer.run(cell_restrictor); + for (int c = n_components - 1; c >= 0; --c) + { + CellRestrictor cell_restrictor( + scheme.prolongation_matrix_1d, + evaluation_data_fine.begin() + c * n_scalar_dofs_fine, + evaluation_data_coarse.begin() + c * n_scalar_dofs_coarse); + + cell_transfer.run(cell_restrictor); + } // ----------------------------- coarse ---------------------------- @@ -1772,7 +1811,7 @@ MGTwoLevelTransfer>:: const unsigned int *indices = &scheme .level_dof_indices_coarse[cell * scheme.dofs_per_cell_coarse]; - for (unsigned int v = 0; v < n_lanes; ++v) + for (unsigned int v = 0; v < n_lanes_filled; ++v) { for (unsigned int i = 0; i < scheme.dofs_per_cell_coarse; ++i) constraint_coarse.distribute_local_to_global( diff --git a/tests/multigrid-global-coarsening/mg_transfer_a_02.cc b/tests/multigrid-global-coarsening/mg_transfer_a_02.cc new file mode 100644 index 0000000000..00ffb5c148 --- /dev/null +++ b/tests/multigrid-global-coarsening/mg_transfer_a_02.cc @@ -0,0 +1,140 @@ +// --------------------------------------------------------------------- +// +// Copyright (C) 2020 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.md at +// the top level directory of deal.II. +// +// --------------------------------------------------------------------- + + +/** + * Like mg_transfer_a_01.cc but for a system of finite elements. + */ + +#include +#include +#include +#include + +#include + +#include + +#include +#include +#include +#include +#include + +#include +#include + +#include +#include + +#include +#include + +#include "test.h" + +using namespace dealii; + +template +void +do_test(const FiniteElement &fe_fine, const FiniteElement &fe_coarse) +{ + auto create_fine_grid = [](Triangulation &tria) { + GridGenerator::hyper_cube(tria); + tria.refine_global(); + + for (auto &cell : tria.active_cell_iterators()) + if (cell->active() && cell->center()[0] < 0.5) + cell->set_refine_flag(); + tria.execute_coarsening_and_refinement(); + }; + + auto execute_global_coarsening = [](Triangulation &tria) { + for (auto &cell : tria.active_cell_iterators()) + cell->set_coarsen_flag(); + tria.execute_coarsening_and_refinement(); + }; + + // create coarse grid + parallel::distributed::Triangulation tria_coarse(MPI_COMM_WORLD); + create_fine_grid(tria_coarse); + execute_global_coarsening(tria_coarse); + + // create fine grid + parallel::distributed::Triangulation tria_fine(MPI_COMM_WORLD); + create_fine_grid(tria_fine); + + // setup dof-handlers + DoFHandler dof_handler_fine(tria_fine); + dof_handler_fine.distribute_dofs(FESystem(fe_fine, dim)); + + DoFHandler dof_handler_coarse(tria_coarse); + dof_handler_coarse.distribute_dofs(FESystem(fe_coarse, dim)); + + // setup constraint matrix + AffineConstraints constraint_coarse; + DoFTools::make_hanging_node_constraints(dof_handler_coarse, + constraint_coarse); + constraint_coarse.close(); + + AffineConstraints constraint_fine; + DoFTools::make_hanging_node_constraints(dof_handler_fine, constraint_fine); + constraint_coarse.close(); + + // setup transfer operator + MGTwoLevelTransfer> transfer; + transfer.reinit_geometric_transfer(dof_handler_fine, + dof_handler_coarse, + constraint_fine, + constraint_coarse); + + test_transfer_operator(transfer, dof_handler_fine, dof_handler_coarse); +} + +template +void +test(int fe_degree) +{ + const auto str_fine = std::to_string(fe_degree); + const auto str_coarse = std::to_string(fe_degree); + + { + deallog.push("CG<2>(" + str_fine + ")<->CG<2>(" + str_coarse + ")"); + do_test(FE_Q(fe_degree), FE_Q(fe_degree)); + deallog.pop(); + } + + { + deallog.push("DG<2>(" + str_fine + ")<->CG<2>(" + str_coarse + ")"); + do_test(FE_DGQ(fe_degree), FE_Q(fe_degree)); + deallog.pop(); + } + + { + deallog.push("DG<2>(" + str_fine + ")<->DG<2>(" + str_coarse + ")"); + do_test(FE_DGQ(fe_degree), FE_DGQ(fe_degree)); + deallog.pop(); + } +} + +int +main(int argc, char **argv) +{ + Utilities::MPI::MPI_InitFinalize mpi_initialization(argc, argv, 1); + MPILogInitAll all; + + deallog.precision(8); + + test<2, double>(2 /*=degree*/); +} diff --git a/tests/multigrid-global-coarsening/mg_transfer_a_02.with_p4est=true.mpirun=1.output b/tests/multigrid-global-coarsening/mg_transfer_a_02.with_p4est=true.mpirun=1.output new file mode 100644 index 0000000000..a02a5890a0 --- /dev/null +++ b/tests/multigrid-global-coarsening/mg_transfer_a_02.with_p4est=true.mpirun=1.output @@ -0,0 +1,67 @@ + +DEAL:0:CG<2>(2)<->CG<2>(2)::weights: +DEAL:0:CG<2>(2)<->CG<2>(2)::0.50000000 1.0000000 1.0000000 1.0000000 1.0000000 1.0000000 0.25000000 0.50000000 0.50000000 0.50000000 1.0000000 1.0000000 1.0000000 1.0000000 1.0000000 0.25000000 0.50000000 0.50000000 0.25000000 0.50000000 0.50000000 1.0000000 1.0000000 1.0000000 0.50000000 1.0000000 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later version. +// The full text of the license can be found in the file LICENSE.md at +// the top level directory of deal.II. +// +// --------------------------------------------------------------------- + + +/** + * Like mg_transfer_p_01.cc but for a system of finite elements. + */ + +#include +#include +#include +#include + +#include + +#include + +#include +#include +#include +#include +#include + +#include +#include + +#include +#include + +#include +#include + +#include "test.h" + +using namespace dealii; + +template +void +do_test(const FiniteElement &fe_fine, const FiniteElement &fe_coarse) +{ + parallel::distributed::Triangulation tria(MPI_COMM_WORLD); + + // create grid + GridGenerator::hyper_cube(tria); + tria.refine_global(); + + for (auto &cell : tria.active_cell_iterators()) + if (cell->active() && cell->center()[0] < 0.5) + cell->set_refine_flag(); + tria.execute_coarsening_and_refinement(); + + // setup dof-handlers + DoFHandler dof_handler_fine(tria); + dof_handler_fine.distribute_dofs(FESystem(fe_fine, dim)); + + DoFHandler dof_handler_coarse(tria); + dof_handler_coarse.distribute_dofs(FESystem(fe_coarse, dim)); + + AffineConstraints constraint_coarse; + DoFTools::make_hanging_node_constraints(dof_handler_coarse, + constraint_coarse); + constraint_coarse.close(); + + AffineConstraints constraint_fine; + DoFTools::make_hanging_node_constraints(dof_handler_fine, constraint_fine); + constraint_fine.close(); + + // setup transfer operator + MGTwoLevelTransfer> transfer; + transfer.reinit_polynomial_transfer(dof_handler_fine, + dof_handler_coarse, + constraint_fine, + constraint_coarse); + + test_transfer_operator(transfer, dof_handler_fine, dof_handler_coarse); +} + +template +void +test(int fe_degree_fine, int fe_degree_coarse) +{ + const auto str_fine = std::to_string(fe_degree_fine); + const auto str_coarse = std::to_string(fe_degree_coarse); + + { + deallog.push("CG<2>(" + str_fine + ")<->CG<2>(" + str_coarse + ")"); + do_test(FE_Q(fe_degree_fine), + FE_Q(fe_degree_coarse)); + deallog.pop(); + } + + { + deallog.push("DG<2>(" + str_fine + ")<->CG<2>(" + str_coarse + ")"); + do_test(FE_DGQ(fe_degree_fine), + FE_Q(fe_degree_coarse)); + deallog.pop(); + } + + { + deallog.push("DG<2>(" + str_fine + ")<->DG<2>(" + str_coarse + ")"); + do_test(FE_DGQ(fe_degree_fine), + FE_DGQ(fe_degree_coarse)); + deallog.pop(); + } +} + +int +main(int argc, char **argv) +{ + Utilities::MPI::MPI_InitFinalize mpi_initialization(argc, argv, 1); + MPILogInitAll all; + + deallog.precision(8); + + test<2, double>(2, 1); +} diff --git a/tests/multigrid-global-coarsening/mg_transfer_p_03.with_p4est=true.mpirun=1.output b/tests/multigrid-global-coarsening/mg_transfer_p_03.with_p4est=true.mpirun=1.output new file mode 100644 index 0000000000..eb71e2526d --- /dev/null +++ b/tests/multigrid-global-coarsening/mg_transfer_p_03.with_p4est=true.mpirun=1.output @@ -0,0 +1,43 @@ + +DEAL:0:CG<2>(2)<->CG<2>(1)::weights: 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