From: Peter Munch Date: Fri, 27 Aug 2021 15:45:53 +0000 (+0200) Subject: Clean up in MGTwoLevelTransfer X-Git-Tag: v9.4.0-rc1~1024^2 X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=48c11bb6c011eb6e9003ec647ea0757d7c17e3f8;p=dealii.git Clean up in MGTwoLevelTransfer --- diff --git a/include/deal.II/multigrid/mg_transfer_global_coarsening.h b/include/deal.II/multigrid/mg_transfer_global_coarsening.h index c226cef185..8cdbf1f9f9 100644 --- a/include/deal.II/multigrid/mg_transfer_global_coarsening.h +++ b/include/deal.II/multigrid/mg_transfer_global_coarsening.h @@ -294,29 +294,32 @@ private: /** * Number of degrees of freedom of a coarse cell. + * + * @note For tensor-product elements, the value equals + * `n_components * (degree_coarse + 1)^dim`. */ unsigned int dofs_per_cell_coarse; /** * Number of degrees of freedom of fine cell. + * + * @note For tensor-product elements, the value equals + * `n_components * (dofs_per_cell_fine + 1)^dim`. */ unsigned int dofs_per_cell_fine; /** - * Polynomial degree of the finite element of the coarse cells. + * Polynomial degree of the finite element of a coarse cell. */ unsigned int degree_coarse; /** - * Polynomial degree of the finite element of the fine cells. + * "Polynomial degree" of the finite element of the union of all children + * of a coarse cell, i.e., actually `degree_fine * 2 + 1` if a cell is + * refined. */ unsigned int degree_fine; - /** - * Weights for continuous elements. - */ - std::vector weights; - /** * Prolongation matrix for non-tensor-product elements. */ @@ -336,18 +339,6 @@ private: * 1D restriction matrix for tensor-product elements. */ AlignedVector> restriction_matrix_1d; - - /** - * DoF indices of the coarse cells, expressed in indices local to the MPI - * rank. - */ - std::vector level_dof_indices_coarse; - - /** - * DoF indices of the fine cells, expressed in indices local to the MPI - * rank. - */ - std::vector level_dof_indices_fine; }; /** @@ -430,6 +421,23 @@ private: */ std::vector distribute_local_to_global_ptr; + /** + * Weights for continuous elements. + */ + std::vector weights; + + /** + * DoF indices of the coarse cells, expressed in indices local to the MPI + * rank. + */ + std::vector level_dof_indices_coarse; + + /** + * DoF indices of the fine cells, expressed in indices local to the MPI + * rank. + */ + std::vector level_dof_indices_fine; + /** * Number of components. */ 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 1aff175162..9c20a074e7 100644 --- a/include/deal.II/multigrid/mg_transfer_global_coarsening.templates.h +++ b/include/deal.II/multigrid/mg_transfer_global_coarsening.templates.h @@ -1463,22 +1463,29 @@ namespace internal get_child_offsets_general( transfer.schemes[0].dofs_per_cell_coarse); + std::vector n_dof_indices_fine(transfer.schemes.size() + 1); + std::vector n_dof_indices_coarse(transfer.schemes.size() + + 1); + + for (unsigned int i = 0; i < transfer.schemes.size(); ++i) + { + n_dof_indices_fine[i + 1] = transfer.schemes[i].dofs_per_cell_fine * + transfer.schemes[i].n_coarse_cells; + n_dof_indices_coarse[i + 1] = + transfer.schemes[i].dofs_per_cell_coarse * + transfer.schemes[i].n_coarse_cells; + } + + for (unsigned int i = 0; i < transfer.schemes.size(); ++i) + { + n_dof_indices_fine[i + 1] += n_dof_indices_fine[i]; + n_dof_indices_coarse[i + 1] += n_dof_indices_coarse[i]; + } // indices { - transfer.schemes[0].level_dof_indices_fine.resize( - transfer.schemes[0].dofs_per_cell_fine * - transfer.schemes[0].n_coarse_cells); - transfer.schemes[0].level_dof_indices_coarse.resize( - transfer.schemes[0].dofs_per_cell_coarse * - transfer.schemes[0].n_coarse_cells); - - transfer.schemes[1].level_dof_indices_fine.resize( - transfer.schemes[1].dofs_per_cell_fine * - transfer.schemes[1].n_coarse_cells); - transfer.schemes[1].level_dof_indices_coarse.resize( - transfer.schemes[1].dofs_per_cell_coarse * - transfer.schemes[1].n_coarse_cells); + transfer.level_dof_indices_fine.resize(n_dof_indices_fine.back()); + transfer.level_dof_indices_coarse.resize(n_dof_indices_coarse.back()); std::vector local_dof_indices( transfer.schemes[0].dofs_per_cell_coarse); @@ -1504,14 +1511,17 @@ namespace internal // ------------------------------ indices ------------------------------ unsigned int *level_dof_indices_coarse_0 = - &transfer.schemes[0].level_dof_indices_coarse[0]; + transfer.level_dof_indices_coarse.data(); unsigned int *level_dof_indices_fine_0 = - &transfer.schemes[0].level_dof_indices_fine[0]; + transfer.level_dof_indices_fine.data(); unsigned int *level_dof_indices_coarse_1 = - &transfer.schemes[1].level_dof_indices_coarse[0]; + level_dof_indices_coarse_0 + + transfer.schemes[0].dofs_per_cell_coarse * + transfer.schemes[0].n_coarse_cells; unsigned int *level_dof_indices_fine_1 = - &transfer.schemes[1].level_dof_indices_fine[0]; + level_dof_indices_fine_0 + transfer.schemes[0].dofs_per_cell_fine * + transfer.schemes[0].n_coarse_cells; process_cells( [&](const auto &cell_coarse, const auto &cell_fine) { @@ -1705,19 +1715,14 @@ namespace internal weight_vector); // ... and store them cell-wise a DG format - transfer.schemes[0].weights.resize( - transfer.schemes[0].n_coarse_cells * - transfer.schemes[0].dofs_per_cell_fine); - transfer.schemes[1].weights.resize( - transfer.schemes[1].n_coarse_cells * - transfer.schemes[1].dofs_per_cell_fine); - - Number * weights_0 = &transfer.schemes[0].weights[0]; - Number * weights_1 = &transfer.schemes[1].weights[0]; + transfer.weights.resize(n_dof_indices_fine.back()); + + Number *weights_0 = transfer.weights.data() + n_dof_indices_fine[0]; + Number *weights_1 = transfer.weights.data() + n_dof_indices_fine[1]; unsigned int *dof_indices_fine_0 = - &transfer.schemes[0].level_dof_indices_fine[0]; + transfer.level_dof_indices_fine.data() + n_dof_indices_fine[0]; unsigned int *dof_indices_fine_1 = - &transfer.schemes[1].level_dof_indices_fine[0]; + transfer.level_dof_indices_fine.data() + n_dof_indices_fine[1]; process_cells( [&](const auto &, const auto &) { @@ -1915,6 +1920,9 @@ namespace internal transfer); } + std::vector n_dof_indices_fine(fe_index_pairs.size() + 1); + std::vector n_dof_indices_coarse(fe_index_pairs.size() + 1); + { std::vector> lexicographic_numbering_fine( fe_index_pairs.size()); @@ -1932,14 +1940,12 @@ namespace internal local_dof_indices_fine[fe_index_pair.second].resize( transfer.schemes[fe_index_pair.second].dofs_per_cell_fine); - transfer.schemes[fe_index_pair.second] - .level_dof_indices_fine.resize( - transfer.schemes[fe_index_pair.second].dofs_per_cell_fine * - transfer.schemes[fe_index_pair.second].n_coarse_cells); - transfer.schemes[fe_index_pair.second] - .level_dof_indices_coarse.resize( - transfer.schemes[fe_index_pair.second].dofs_per_cell_coarse * - transfer.schemes[fe_index_pair.second].n_coarse_cells); + n_dof_indices_fine[fe_index_pair.second + 1] = + transfer.schemes[fe_index_pair.second].dofs_per_cell_fine * + transfer.schemes[fe_index_pair.second].n_coarse_cells; + n_dof_indices_coarse[fe_index_pair.second + 1] = + transfer.schemes[fe_index_pair.second].dofs_per_cell_coarse * + transfer.schemes[fe_index_pair.second].n_coarse_cells; const auto reference_cell = dof_handler_fine.get_fe(fe_index_pair.first.second) @@ -1992,6 +1998,15 @@ namespace internal } } + for (unsigned int i = 0; i < fe_index_pairs.size(); ++i) + { + n_dof_indices_fine[i + 1] += n_dof_indices_fine[i]; + n_dof_indices_coarse[i + 1] += n_dof_indices_coarse[i]; + } + + transfer.level_dof_indices_fine.resize(n_dof_indices_fine.back()); + transfer.level_dof_indices_coarse.resize(n_dof_indices_coarse.back()); + // ------------------------------ indices ----------------------------- std::vector level_dof_indices_coarse_( fe_index_pairs.size()); @@ -2000,10 +2015,11 @@ namespace internal for (unsigned int i = 0; i < fe_index_pairs.size(); ++i) { - level_dof_indices_coarse_[i] = - transfer.schemes[i].level_dof_indices_coarse.data(); level_dof_indices_fine_[i] = - transfer.schemes[i].level_dof_indices_fine.data(); + transfer.level_dof_indices_fine.data() + n_dof_indices_fine[i]; + level_dof_indices_coarse_[i] = + transfer.level_dof_indices_coarse.data() + + n_dof_indices_coarse[i]; } bool fine_indices_touch_remote_dofs = false; @@ -2200,9 +2216,7 @@ namespace internal weight_vector); // ... and store them cell-wise a DG format - for (auto &scheme : transfer.schemes) - scheme.weights.resize(scheme.n_coarse_cells * - scheme.dofs_per_cell_fine); + transfer.weights.resize(n_dof_indices_fine.back()); std::vector level_dof_indices_fine_( fe_index_pairs.size()); @@ -2211,8 +2225,8 @@ namespace internal for (unsigned int i = 0; i < fe_index_pairs.size(); ++i) { level_dof_indices_fine_[i] = - &transfer.schemes[i].level_dof_indices_fine[0]; - weights_[i] = &transfer.schemes[i].weights[0]; + transfer.level_dof_indices_fine.data() + n_dof_indices_fine[i]; + weights_[i] = transfer.weights.data() + n_dof_indices_fine[i]; } process_cells([&](const auto &cell_coarse, const auto &cell_fine) { @@ -2495,20 +2509,18 @@ MGTwoLevelTransfer>:: AlignedVector evaluation_data_fine; AlignedVector evaluation_data_coarse; + const unsigned int *indices_coarse = level_dof_indices_coarse.data(); + const unsigned int *indices_fine = level_dof_indices_fine.data(); + const Number * weights = nullptr; + + if (fine_element_is_continuous) + weights = this->weights.data(); + for (const auto &scheme : schemes) { // identity -> take short cut and work directly on global vectors if (scheme.degree_fine == scheme.degree_coarse) { - const unsigned int *indices_fine = - scheme.level_dof_indices_fine.data(); - const unsigned int *indices_coarse = - scheme.level_dof_indices_coarse.data(); - const Number *weights = nullptr; - - if (fine_element_is_continuous) - weights = scheme.weights.data(); - for (unsigned int cell = 0; cell < scheme.n_coarse_cells; ++cell) { if (fine_element_is_continuous) @@ -2551,20 +2563,15 @@ MGTwoLevelTransfer>:: 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_filled; ++v) - { - for (unsigned int i = 0; i < scheme.dofs_per_cell_coarse; ++i) - evaluation_data_coarse[i][v] = - this->vec_coarse.local_element(indices[i]); - indices += scheme.dofs_per_cell_coarse; - } - } + 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] = + this->vec_coarse.local_element(indices_coarse[i]); + indices_coarse += scheme.dofs_per_cell_coarse; + } - // ---------------------------- coarse ----------------------------- + // ---------------------------- coarse ------------------------------- for (int c = n_components - 1; c >= 0; --c) { CellProlongator cell_prolongator( @@ -2579,34 +2586,25 @@ MGTwoLevelTransfer>:: cell_prolongator.run_full(n_scalar_dofs_fine, n_scalar_dofs_coarse); } - // ------------------------------ fine ----------------------------- + // ------------------------------ fine ------------------------------- // weight and write into dst vector - { - const unsigned int *indices = - &scheme.level_dof_indices_fine[cell * scheme.dofs_per_cell_fine]; - const Number *weights = nullptr; - - if (fine_element_is_continuous) - weights = &scheme.weights[cell * scheme.dofs_per_cell_fine]; - - for (unsigned int v = 0; v < n_lanes_filled; ++v) - { - if (fine_element_is_continuous) - for (unsigned int i = 0; i < scheme.dofs_per_cell_fine; ++i) - vec_fine_ptr->local_element(indices[i]) += - evaluation_data_fine[i][v] * weights[i]; - else - for (unsigned int i = 0; i < scheme.dofs_per_cell_fine; ++i) - vec_fine_ptr->local_element(indices[i]) += - evaluation_data_fine[i][v]; + for (unsigned int v = 0; v < n_lanes_filled; ++v) + { + if (fine_element_is_continuous) + for (unsigned int i = 0; i < scheme.dofs_per_cell_fine; ++i) + vec_fine_ptr->local_element(indices_fine[i]) += + evaluation_data_fine[i][v] * weights[i]; + else + for (unsigned int i = 0; i < scheme.dofs_per_cell_fine; ++i) + vec_fine_ptr->local_element(indices_fine[i]) += + evaluation_data_fine[i][v]; - indices += scheme.dofs_per_cell_fine; + indices_fine += scheme.dofs_per_cell_fine; - if (fine_element_is_continuous) - weights += scheme.dofs_per_cell_fine; - } - } + if (fine_element_is_continuous) + weights += scheme.dofs_per_cell_fine; + } } } @@ -2665,20 +2663,18 @@ MGTwoLevelTransfer>:: value * distribute_local_to_global_values[j]; }; + const unsigned int *indices_coarse = level_dof_indices_coarse.data(); + const unsigned int *indices_fine = level_dof_indices_fine.data(); + const Number * weights = nullptr; + + if (fine_element_is_continuous) + weights = this->weights.data(); + for (const auto &scheme : schemes) { // identity -> take short cut and work directly on global vectors if (scheme.degree_fine == scheme.degree_coarse) { - const unsigned int *indices_fine = - scheme.level_dof_indices_fine.data(); - const unsigned int *indices_coarse = - scheme.level_dof_indices_coarse.data(); - const Number *weights = nullptr; - - if (fine_element_is_continuous) - weights = scheme.weights.data(); - for (unsigned int cell = 0; cell < scheme.n_coarse_cells; ++cell) { if (fine_element_is_continuous) @@ -2724,33 +2720,24 @@ MGTwoLevelTransfer>:: n_lanes; // read from source vector and weight - { - const unsigned int *indices = - &scheme.level_dof_indices_fine[cell * scheme.dofs_per_cell_fine]; - const Number *weights = nullptr; - - if (fine_element_is_continuous) - weights = &scheme.weights[cell * scheme.dofs_per_cell_fine]; - - for (unsigned int v = 0; v < n_lanes_filled; ++v) - { - if (fine_element_is_continuous) - for (unsigned int i = 0; i < scheme.dofs_per_cell_fine; ++i) - evaluation_data_fine[i][v] = - vec_fine_ptr->local_element(indices[i]) * weights[i]; - else - for (unsigned int i = 0; i < scheme.dofs_per_cell_fine; ++i) - evaluation_data_fine[i][v] = - vec_fine_ptr->local_element(indices[i]); + for (unsigned int v = 0; v < n_lanes_filled; ++v) + { + if (fine_element_is_continuous) + for (unsigned int i = 0; i < scheme.dofs_per_cell_fine; ++i) + evaluation_data_fine[i][v] = + vec_fine_ptr->local_element(indices_fine[i]) * weights[i]; + else + for (unsigned int i = 0; i < scheme.dofs_per_cell_fine; ++i) + evaluation_data_fine[i][v] = + vec_fine_ptr->local_element(indices_fine[i]); - indices += scheme.dofs_per_cell_fine; + indices_fine += scheme.dofs_per_cell_fine; - if (fine_element_is_continuous) - weights += scheme.dofs_per_cell_fine; - } - } + if (fine_element_is_continuous) + weights += scheme.dofs_per_cell_fine; + } - // ------------------------------ fine ----------------------------- + // ------------------------------ fine ------------------------------- for (int c = n_components - 1; c >= 0; --c) { CellRestrictor cell_restrictor( @@ -2765,22 +2752,17 @@ MGTwoLevelTransfer>:: cell_restrictor.run_full(n_scalar_dofs_fine, n_scalar_dofs_coarse); } - // ----------------------------- coarse ---------------------------- + // ----------------------------- coarse ------------------------------ // write into dst vector - { - const unsigned int *indices = - &scheme - .level_dof_indices_coarse[cell * scheme.dofs_per_cell_coarse]; - for (unsigned int v = 0; v < n_lanes_filled; ++v) - { - for (unsigned int i = 0; i < scheme.dofs_per_cell_coarse; ++i) - distribute_local_to_global(indices[i], - evaluation_data_coarse[i][v], - this->vec_coarse); - indices += scheme.dofs_per_cell_coarse; - } - } + for (unsigned int v = 0; v < n_lanes_filled; ++v) + { + for (unsigned int i = 0; i < scheme.dofs_per_cell_coarse; ++i) + distribute_local_to_global(indices_coarse[i], + evaluation_data_coarse[i][v], + this->vec_coarse); + indices_coarse += scheme.dofs_per_cell_coarse; + } } } @@ -2815,16 +2797,14 @@ MGTwoLevelTransfer>:: AlignedVector evaluation_data_fine; AlignedVector evaluation_data_coarse; + const unsigned int *indices_coarse = level_dof_indices_coarse.data(); + const unsigned int *indices_fine = level_dof_indices_fine.data(); + for (const auto &scheme : schemes) { // identity -> take short cut and work directly on global vectors if (scheme.degree_fine == scheme.degree_coarse) { - const unsigned int *indices_fine = - scheme.level_dof_indices_fine.data(); - const unsigned int *indices_coarse = - scheme.level_dof_indices_coarse.data(); - for (unsigned int cell = 0; cell < scheme.n_coarse_cells; ++cell) { for (unsigned int i = 0; i < scheme.dofs_per_cell_fine; ++i) @@ -2858,21 +2838,16 @@ MGTwoLevelTransfer>:: n_lanes; // read from source vector and weight - { - const unsigned int *indices = - &scheme.level_dof_indices_fine[cell * scheme.dofs_per_cell_fine]; - - 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] = - vec_fine_ptr->local_element(indices[i]); + 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] = + vec_fine_ptr->local_element(indices_fine[i]); - indices += scheme.dofs_per_cell_fine; - } - } + indices_fine += scheme.dofs_per_cell_fine; + } - // ------------------------------ fine ----------------------------- + // ------------------------------ fine ------------------------------- for (int c = n_components - 1; c >= 0; --c) { CellRestrictor cell_restrictor( @@ -2887,21 +2862,16 @@ MGTwoLevelTransfer>:: cell_restrictor.run_full(n_scalar_dofs_fine, n_scalar_dofs_coarse); } - // ----------------------------- coarse ---------------------------- + // ----------------------------- coarse ------------------------------ // write into dst vector - { - const unsigned int *indices = - &scheme - .level_dof_indices_coarse[cell * scheme.dofs_per_cell_coarse]; - for (unsigned int v = 0; v < n_lanes_filled; ++v) - { - for (unsigned int i = 0; i < scheme.dofs_per_cell_coarse; ++i) - this->vec_coarse.local_element(indices[i]) = - evaluation_data_coarse[i][v]; - indices += scheme.dofs_per_cell_coarse; - } - } + for (unsigned int v = 0; v < n_lanes_filled; ++v) + { + for (unsigned int i = 0; i < scheme.dofs_per_cell_coarse; ++i) + this->vec_coarse.local_element(indices_coarse[i]) = + evaluation_data_coarse[i][v]; + indices_coarse += scheme.dofs_per_cell_coarse; + } } }