PETScWrappers::Partitioner Class Reference

#include <deal.II/lac/petsc_communication_pattern.h>

Inheritance diagram for PETScWrappers::Partitioner:

Public Member Functions
	Partitioner ()
virtual	~Partitioner () override=default
virtual void	reinit (const IndexSet &locally_owned_indices, const IndexSet &ghost_indices, const MPI_Comm communicator) override
void	reinit (const IndexSet &locally_owned_indices, const IndexSet &ghost_indices, const IndexSet &larger_ghost_indices, const MPI_Comm communicator)
unsigned int	n_ghost_indices () const
const IndexSet &	ghost_indices () const
template<typename Number >
void	export_to_ghosted_array (const ArrayView< const Number > &locally_owned_array, const ArrayView< Number > &ghost_array) const
template<typename Number >
void	export_to_ghosted_array_start (const ArrayView< const Number > &locally_owned_array, const ArrayView< Number > &ghost_array) const
template<typename Number >
void	export_to_ghosted_array_finish (const ArrayView< const Number > &locally_owned_array, const ArrayView< Number > &ghost_array) const
template<typename Number >
void	import_from_ghosted_array (const VectorOperation::values op, const ArrayView< const Number > &ghost_array, const ArrayView< Number > &locally_owned_array) const
template<typename Number >
void	import_from_ghosted_array_start (const VectorOperation::values op, const ArrayView< const Number > &ghost_array, const ArrayView< Number > &locally_owned_array) const
template<typename Number >
void	import_from_ghosted_array_finish (const VectorOperation::values op, const ArrayView< const Number > &ghost_array, const ArrayView< Number > &locally_owned_array) const
MPI_Comm	get_mpi_communicator () const override

Protected Attributes
CommunicationPattern	ghost
CommunicationPattern	larger_ghost
IndexSet	ghost_indices_data
types::global_dof_index	n_ghost_indices_data
types::global_dof_index	n_ghost_indices_larger

Detailed Description

Partitioner implementation based on the PetscSF object. This class implements the same communication patterns of Utilities::MPI::Partitioner, internally using PetscSF API calls. Differently from the Utilities::MPI::Partitioner implementation, here we don't need to specify the communication channel, the temporary storage, and the MPI requests within export and import functions. Moreover, the import API does not zero the input ghost array.

For additional information, see the paper [214]

Definition at line 219 of file petsc_communication_pattern.h.

Constructor & Destructor Documentation

Partitioner()

PETScWrappers::Partitioner::Partitioner

(

)

Default constructor.

~Partitioner()

virtual PETScWrappers::Partitioner::~Partitioner ( )

overridevirtualdefault

Destructor.

Member Function Documentation

reinit() [1/2]

virtual void PETScWrappers::Partitioner::reinit ( const IndexSet & locally_owned_indices, const IndexSet & ghost_indices, const MPI_Comm communicator )

overridevirtual

Reinitialize the partitioner. As for the Utilities::MPI::Partitioner, any entry of ghost_indices that is also present in locally_owned_indices is discarded.

Implements Utilities::MPI::CommunicationPatternBase.

reinit() [2/2]

void PETScWrappers::Partitioner::reinit	(	const IndexSet &	locally_owned_indices,
		const IndexSet &	ghost_indices,
		const IndexSet &	larger_ghost_indices,
		const MPI_Comm	communicator )

Reinitialize the partitioner. As for the Utilities::MPI::Partitioner, any entry of ghost_indices that is also present in locally_owned_indices is discarded. This reinitialization will allow to perform communications either using a ghost data array of the size of ghost_indices or of larger_ghost_indices.

n_ghost_indices()

unsigned int PETScWrappers::Partitioner::n_ghost_indices ( ) const

inline

Return the actual number of ghost indices.

Definition at line 259 of file petsc_communication_pattern.h.

ghost_indices()

const IndexSet & PETScWrappers::Partitioner::ghost_indices ( ) const

inline

Return an IndexSet representation of the actual ghost indices.

Definition at line 268 of file petsc_communication_pattern.h.

export_to_ghosted_array()

template<typename Number >

void PETScWrappers::Partitioner::export_to_ghosted_array	(	const ArrayView< const Number > &	locally_owned_array,
		const ArrayView< Number > &	ghost_array ) const

Fill the vector ghost_array according to the precomputed communication pattern with values from locally_owned_array.

export_to_ghosted_array_start()

template<typename Number >

void PETScWrappers::Partitioner::export_to_ghosted_array_start	(	const ArrayView< const Number > &	locally_owned_array,
		const ArrayView< Number > &	ghost_array ) const

Start the communication round to fill the vector ghost_array according to the precomputed communication pattern with values from locally_owned_array. It can be overlapped with other communications. Differently from the Utilities::MPI::Partitioner implementation, here we don't need to specify the communication channel, the temporary storage, and the MPI requests.

export_to_ghosted_array_finish()

template<typename Number >

void PETScWrappers::Partitioner::export_to_ghosted_array_finish	(	const ArrayView< const Number > &	locally_owned_array,
		const ArrayView< Number > &	ghost_array ) const

Finish the communication round to fill the vector ghost_array according to the precomputed communication pattern with values from locally_owned_array. It can be overlapped with other communications. Differently from the Utilities::MPI::Partitioner implementation, here we don't need to specify the communication channel, the temporary storage, and the MPI requests.

import_from_ghosted_array()

template<typename Number >

void PETScWrappers::Partitioner::import_from_ghosted_array	(	const VectorOperation::values	op,
		const ArrayView< const Number > &	ghost_array,
		const ArrayView< Number > &	locally_owned_array ) const

Modify the vector locally_owned_array according to the precomputed communication pattern and the operation op with values from ghost_array.

import_from_ghosted_array_start()

template<typename Number >

void PETScWrappers::Partitioner::import_from_ghosted_array_start	(	const VectorOperation::values	op,
		const ArrayView< const Number > &	ghost_array,
		const ArrayView< Number > &	locally_owned_array ) const

Start the communication round to modify the vector locally_owned_array according to the precomputed communication pattern and the operation op with values from ghost_array. It can be overlapped with other communications. Differently from the Utilities::MPI::Partitioner implementation, here we don't need to specify the communication channel, the temporary storage, and the MPI requests.

import_from_ghosted_array_finish()

template<typename Number >

void PETScWrappers::Partitioner::import_from_ghosted_array_finish	(	const VectorOperation::values	op,
		const ArrayView< const Number > &	ghost_array,
		const ArrayView< Number > &	locally_owned_array ) const

Finish the communication round to modify the vector locally_owned_array according to the precomputed communication pattern and the operation op with values from ghost_array. It can be overlapped with other communications. Differently from the Utilities::MPI::Partitioner implementation, here we don't need to specify the communication channel, the temporary storage, and the MPI requests.

get_mpi_communicator()

MPI_Comm PETScWrappers::Partitioner::get_mpi_communicator ( ) const

overridevirtual

Return the underlying MPI communicator.

Implements Utilities::MPI::CommunicationPatternBase.

Member Data Documentation

ghost

CommunicationPattern PETScWrappers::Partitioner::ghost

protected

Definition at line 360 of file petsc_communication_pattern.h.

larger_ghost

CommunicationPattern PETScWrappers::Partitioner::larger_ghost

protected

Definition at line 360 of file petsc_communication_pattern.h.

ghost_indices_data

IndexSet PETScWrappers::Partitioner::ghost_indices_data

protected

Definition at line 361 of file petsc_communication_pattern.h.

n_ghost_indices_data

types::global_dof_index PETScWrappers::Partitioner::n_ghost_indices_data

protected

Definition at line 362 of file petsc_communication_pattern.h.

n_ghost_indices_larger

types::global_dof_index PETScWrappers::Partitioner::n_ghost_indices_larger

protected

Definition at line 363 of file petsc_communication_pattern.h.

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The documentation for this class was generated from the following file:

• include/deal.II/lac/petsc_communication_pattern.h