From: Peter Munch Date: Wed, 17 Jul 2024 07:43:39 +0000 (+0200) Subject: Triangulation: pack/unpack fixed/variable data X-Git-Tag: v9.6.0-rc1~83^2 X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7c92510f7dd40dadba745b7d2476a3f8d1df21cb;p=dealii.git Triangulation: pack/unpack fixed/variable data --- diff --git a/include/deal.II/distributed/fully_distributed_tria.h b/include/deal.II/distributed/fully_distributed_tria.h index a54abc6d04..5480ee3b2b 100644 --- a/include/deal.II/distributed/fully_distributed_tria.h +++ b/include/deal.II/distributed/fully_distributed_tria.h @@ -294,8 +294,8 @@ namespace parallel * The stored vector will have a size equal to the number of locally owned * active cells and will be ordered by the occurrence of those cells. */ - virtual void - update_cell_relations() override; + void + update_cell_relations(); virtual void update_number_cache() override; diff --git a/include/deal.II/distributed/tria.h b/include/deal.II/distributed/tria.h index f9640b3b98..414c745b63 100644 --- a/include/deal.II/distributed/tria.h +++ b/include/deal.II/distributed/tria.h @@ -780,8 +780,8 @@ namespace parallel * the refinement process. With this information, we can prepare all * buffers for data transfer accordingly. */ - virtual void - update_cell_relations() override; + void + update_cell_relations(); /** * Two arrays that store which p4est tree corresponds to which coarse @@ -964,8 +964,8 @@ namespace parallel * This function is not implemented, but needs to be present for the * compiler. */ - virtual void - update_cell_relations() override; + void + update_cell_relations(); /** * Dummy arrays. This class isn't usable but the compiler wants to see @@ -1104,8 +1104,8 @@ namespace parallel * Dummy replacement to allow for better error messages when compiling * this class. */ - virtual void - update_cell_relations() override + void + update_cell_relations() {} }; } // namespace distributed diff --git a/include/deal.II/grid/tria.h b/include/deal.II/grid/tria.h index 86f3f2946d..9f187889d8 100644 --- a/include/deal.II/grid/tria.h +++ b/include/deal.II/grid/tria.h @@ -367,7 +367,7 @@ namespace internal * will be, attached to cells via the register_data_attach() function * and later retrieved via notify_ready_to_unpack(). * - * This internalclass is dedicated to the data serialization and transfer + * This internal class is dedicated to the data serialization and transfer * across repartitioned meshes and to/from the file system. * * It is designed to store all data buffers intended for serialization. @@ -379,6 +379,12 @@ namespace internal public: using cell_iterator = TriaIterator>; + /** + * Version number stored in the .info file written by + * Triangulation::save(). + */ + static inline constexpr unsigned int version_number = 5; + /** * Auxiliary data structure for assigning a CellStatus to a deal.II cell * iterator. For an extensive description of the former, see the @@ -3881,18 +3887,16 @@ protected: const unsigned int n_attached_deserialize_variable); /** - * A function to record the CellStatus of currently active cells that - * are locally owned. This information is mandatory to transfer data - * between meshes during adaptation or serialization, e.g., using - * parallel::distributed::SolutionTransfer. + * A function to record the CellStatus of currently active cells. + * This information is mandatory to transfer data between meshes + * during adaptation or serialization, e.g., using SolutionTransfer. * * Relations will be stored in the private member local_cell_relations. For * an extensive description of CellStatus, see the documentation for the * member function register_data_attach(). */ - virtual void - update_cell_relations() - {} + void + update_cell_relations(); /** * Vector of pairs, each containing a deal.II cell iterator and its diff --git a/source/grid/tria.cc b/source/grid/tria.cc index 22979763d3..fa228791d3 100644 --- a/source/grid/tria.cc +++ b/source/grid/tria.cc @@ -12701,6 +12701,8 @@ void Triangulation::create_triangulation( clear_user_flags(); } + this->update_cell_relations(); + // inform all listeners that the triangulation has been created signals.create(); } @@ -13691,20 +13693,76 @@ template DEAL_II_CXX20_REQUIRES((concepts::is_valid_dim_spacedim)) void Triangulation::save(const std::string &filename) const { - // Create boost archive then call alternative version of the save function - std::ofstream ofs(filename); + // Save triangulation information. + std::ofstream ofs(filename + "_triangulation.data"); boost::archive::text_oarchive oa(ofs, boost::archive::no_header); save(oa, 0); + + // Save attached data. + { + std::ofstream ifs(filename + ".info"); + ifs + << "version nproc n_attached_fixed_size_objs n_attached_variable_size_objs n_active_cells" + << std::endl + << internal::CellAttachedDataSerializer::version_number + << " " << 1 << " " << this->cell_attached_data.pack_callbacks_fixed.size() + << " " << this->cell_attached_data.pack_callbacks_variable.size() << " " + << this->n_global_active_cells() << std::endl; + } + + this->save_attached_data(0, this->n_global_active_cells(), filename); } template DEAL_II_CXX20_REQUIRES((concepts::is_valid_dim_spacedim)) void Triangulation::load(const std::string &filename) { - // Create boost archive then call alternative version of the load function - std::ifstream ifs(filename); + // Load triangulation information. + std::ifstream ifs(filename + "_triangulation.data"); boost::archive::text_iarchive ia(ifs, boost::archive::no_header); load(ia, 0); + + // Load attached data. + unsigned int version, numcpus, attached_count_fixed, attached_count_variable, + n_global_active_cells; + { + std::ifstream ifs(std::string(filename) + ".info"); + AssertThrow(ifs.fail() == false, ExcIO()); + std::string firstline; + getline(ifs, firstline); + ifs >> version >> numcpus >> attached_count_fixed >> + attached_count_variable >> n_global_active_cells; + } + + AssertThrow(numcpus == 1, + ExcMessage("Incompatible number of CPUs found in .info file.")); + + const auto expected_version = + ::dealii::internal::CellAttachedDataSerializer::version_number; + AssertThrow(version == expected_version, + ExcMessage( + "The information saved in the file you are trying " + "to read the triangulation from was written with an " + "incompatible file format version and cannot be read.")); + Assert(this->n_global_active_cells() == n_global_active_cells, + ExcMessage("The number of cells of the triangulation differs " + "from the number of cells written into the .info file.")); + + // Clear all of the callback data, as explained in the documentation of + // register_data_attach(). + this->cell_attached_data.n_attached_data_sets = 0; + this->cell_attached_data.n_attached_deserialize = + attached_count_fixed + attached_count_variable; + + this->load_attached_data(0, + this->n_global_active_cells(), + this->n_active_cells(), + filename, + attached_count_fixed, + attached_count_variable); + + this->update_cell_relations(); } #endif @@ -15563,6 +15621,26 @@ const typename std::map< } +template +DEAL_II_CXX20_REQUIRES((concepts::is_valid_dim_spacedim)) +void Triangulation::update_cell_relations() +{ + // We only update the cell relations here for serial triangulations. + // For other triangulations, this is done at other stages of + // mesh creation and mesh refinement. + if (dynamic_cast *>( + this)) + return; + + this->local_cell_relations.clear(); + this->local_cell_relations.reserve(this->n_active_cells()); + + for (const auto &cell : this->active_cell_iterators()) + this->local_cell_relations.emplace_back( + cell, ::dealii::CellStatus::cell_will_persist); +} + + template DEAL_II_CXX20_REQUIRES((concepts::is_valid_dim_spacedim)) @@ -15611,6 +15689,9 @@ void Triangulation::execute_coarsening_and_refinement() update_periodic_face_map(); + if (this->cell_attached_data.n_attached_data_sets == 0) + this->update_cell_relations(); + # ifdef DEBUG // In debug mode, we want to check for some consistency of the diff --git a/source/particles/particle_handler.cc b/source/particles/particle_handler.cc index 1e9d71ef67..5e760fbec1 100644 --- a/source/particles/particle_handler.cc +++ b/source/particles/particle_handler.cc @@ -2194,21 +2194,6 @@ namespace Particles void ParticleHandler::register_data_attach() { - parallel::DistributedTriangulationBase - *distributed_triangulation = - const_cast *>( - dynamic_cast< - const parallel::DistributedTriangulationBase *>( - &(*triangulation))); - (void)distributed_triangulation; - - Assert( - distributed_triangulation != nullptr, - ExcMessage( - "Mesh refinement in a non-distributed triangulation is not supported " - "by the ParticleHandler class. Either insert particles after mesh " - "creation and do not refine afterwards, or use a distributed triangulation.")); - const auto callback_function = [this](const typename Triangulation::cell_iterator &cell_iterator, @@ -2216,8 +2201,9 @@ namespace Particles return this->pack_callback(cell_iterator, cell_status); }; - handle = distributed_triangulation->register_data_attach( - callback_function, /*returns_variable_size_data=*/true); + handle = const_cast *>(&*triangulation) + ->register_data_attach(callback_function, + /*returns_variable_size_data=*/true); } @@ -2256,21 +2242,6 @@ namespace Particles ParticleHandler::notify_ready_to_unpack( const bool serialization) { - parallel::DistributedTriangulationBase - *distributed_triangulation = - const_cast *>( - dynamic_cast< - const parallel::DistributedTriangulationBase *>( - &(*triangulation))); - (void)distributed_triangulation; - - Assert( - distributed_triangulation != nullptr, - ExcMessage( - "Mesh refinement in a non-distributed triangulation is not supported " - "by the ParticleHandler class. Either insert particles after mesh " - "creation and do not refine afterwards, or use a distributed triangulation.")); - // First prepare container for insertion clear(); @@ -2293,8 +2264,8 @@ namespace Particles this->unpack_callback(cell_iterator, cell_status, range_iterator); }; - distributed_triangulation->notify_ready_to_unpack(handle, - callback_function); + const_cast *>(&*triangulation) + ->notify_ready_to_unpack(handle, callback_function); // Reset handle and update global numbers. handle = numbers::invalid_unsigned_int;