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

Inheritance diagram for LinearAlgebra::EpetraWrappers::Vector:

Public Member Functions
	Vector ()

	Vector (const Vector &V)

	Vector (const IndexSet &parallel_partitioner, const MPI_Comm &communicator)

void	reinit (const IndexSet &parallel_partitioner, const MPI_Comm &communicator, const bool omit_zeroing_entries=false)

Vector &	operator= (const Vector &V)

virtual void	import (const ReadWriteVector< double > &V, VectorOperation::values operation, std_cxx11::shared_ptr< const CommunicationPatternBase > communication_pattern=std_cxx11::shared_ptr< const CommunicationPatternBase >())

virtual Vector &	operator*= (const double factor)

virtual Vector &	operator/= (const double factor)

virtual Vector &	operator+= (const VectorSpaceVector< double > &V)

virtual Vector &	operator-= (const VectorSpaceVector< double > &V)

virtual double	operator* (const VectorSpaceVector< double > &V) const

virtual void	add (const double a)

virtual void	add (const double a, const VectorSpaceVector< double > &V)

virtual void	add (const double a, const VectorSpaceVector< double > &V, const double b, const VectorSpaceVector< double > &W)

virtual void	sadd (const double s, const double a, const VectorSpaceVector< double > &V)

virtual void	scale (const VectorSpaceVector< double > &scaling_factors)

virtual void	equ (const double a, const VectorSpaceVector< double > &V)

virtual double	mean_value () const

virtual double	l1_norm () const

virtual double	l2_norm () const

virtual double	linfty_norm () const

virtual double	add_and_dot (const double a, const VectorSpaceVector< double > &V, const VectorSpaceVector< double > &W)

virtual size_type	size () const

MPI_Comm	get_mpi_communicator () const

virtual ::IndexSet	locally_owned_elements () const

const Epetra_FEVector &	trilinos_vector () const

Epetra_FEVector &	trilinos_vector ()

virtual void	print (std::ostream &out, const unsigned int precision=3, const bool scientific=true, const bool across=true) const

virtual std::size_t	memory_consumption () const

Public Member Functions inherited from LinearAlgebra::VectorSpaceVector< double >
virtual void	compress (VectorOperation::values)

virtual	~VectorSpaceVector ()

Static Public Member Functions
static ::ExceptionBase &	ExcDifferentParallelPartitioning ()

static ::ExceptionBase &	ExcVectorTypeNotCompatible ()

static ::ExceptionBase &	ExcTrilinosError (int arg1)

Private Member Functions
void	create_epetra_comm_pattern (const IndexSet &source_index_set, const MPI_Comm &mpi_comm)

Private Attributes
std_cxx11::shared_ptr< Epetra_FEVector >	vector

::IndexSet	source_stored_elements

std_cxx11::shared_ptr< const CommunicationPattern >	epetra_comm_pattern

Detailed Description

This class implements a wrapper to the Trilinos distributed vector class Epetra_FEVector. This class is derived from the LinearAlgebra::VectorSpaceVector class. Note however that Epetra only works with Number = double.

Author: Bruno Turcksin, 2015

Definition at line 54 of file trilinos_epetra_vector.h.

Constructor & Destructor Documentation

◆ Vector() [1/3]

Vector< Number >::Vector ( )

Constructor. Create a vector of dimension zero.

Definition at line 37 of file trilinos_epetra_vector.cc.

◆ Vector() [2/3]

Vector< Number >::Vector ( const Vector & V )

Copy constructor. Sets the dimension and the partitioning to that of the given vector and copies all elements.

Definition at line 44 of file trilinos_epetra_vector.cc.

◆ Vector() [3/3]

Vector< Number >::Vector	(	const IndexSet &	parallel_partitioner,
		const MPI_Comm &	communicator
	)

explicit

This constructor takes an IndexSet that defines how to distribute the individual components among the MPI processors. Since it also includes information about the size of the vector, this is all we need to genereate a parallel vector.

Definition at line 51 of file trilinos_epetra_vector.cc.

Member Function Documentation

◆ reinit()

void Vector< Number >::reinit	(	const IndexSet &	parallel_partitioner,
		const MPI_Comm &	communicator,
		const bool	omit_zeroing_entries = `false`
	)

Reinit functionality. This function destroys the old vector content and generates a new one based on the input partitioning. The flag omit_zeroing_entries determines whether the vector should be filled with zero (false) or left untouched (true).

Definition at line 59 of file trilinos_epetra_vector.cc.

◆ operator=()

Vector & Vector< Number >::operator= ( const Vector & V )

Copy function. This function takes a Vector and copies all the elements. The Vector will have the same parallel distribution as V.

Definition at line 76 of file trilinos_epetra_vector.cc.

◆ import()

void Vector< Number >::import	(	const ReadWriteVector< double > &	V,
		VectorOperation::values	operation,
		std_cxx11::shared_ptr< const CommunicationPatternBase >	communication_pattern = `std_cxx11::shared_ptr<const CommunicationPatternBase> ()`
	)

virtual

Imports all the elements present in the vector's IndexSet from the input vector V. VectorOperation::values operation is used to decide if the elements in V should be added to the current vector or replace the current elements. The last parameter can be used if the same communication pattern is used multiple times. This can be used to improve performance.

Implements LinearAlgebra::VectorSpaceVector< double >.

Definition at line 103 of file trilinos_epetra_vector.cc.

◆ operator*=()

Vector & Vector< Number >::operator*= ( const double factor )

virtual

Multiply the entire vector by a fixed factor.

Implements LinearAlgebra::VectorSpaceVector< double >.

Definition at line 146 of file trilinos_epetra_vector.cc.

◆ operator/=()

Vector & Vector< Number >::operator/= ( const double factor )

virtual

Divide the entire vector by a fixed factor.

Implements LinearAlgebra::VectorSpaceVector< double >.

Definition at line 156 of file trilinos_epetra_vector.cc.

◆ operator+=()

Vector & Vector< Number >::operator+= ( const VectorSpaceVector< double > & V )

virtual

Add the vector V to the present one.

Implements LinearAlgebra::VectorSpaceVector< double >.

Definition at line 167 of file trilinos_epetra_vector.cc.

◆ operator-=()

Vector & Vector< Number >::operator-= ( const VectorSpaceVector< double > & V )

virtual

Substract the vector V from the present one.

Implements LinearAlgebra::VectorSpaceVector< double >.

Definition at line 213 of file trilinos_epetra_vector.cc.

◆ operator*()

double Vector< Number >::operator* ( const VectorSpaceVector< double > & V ) const

virtual

Return the scalar product of two vectors. The vectors need to have the same layout.

Implements LinearAlgebra::VectorSpaceVector< double >.

Definition at line 222 of file trilinos_epetra_vector.cc.

◆ add() [1/3]

void Vector< Number >::add ( const double a )

virtual

Add a to all components. Note that is a scalar not a vector.

Implements LinearAlgebra::VectorSpaceVector< double >.

Definition at line 245 of file trilinos_epetra_vector.cc.

◆ add() [2/3]

void Vector< Number >::add	(	const double	a,
		const VectorSpaceVector< double > &	V
	)

virtual

Simple addition of a multiple of a vector, i.e. *this += a*V. The vectors need to have the same layout.

Implements LinearAlgebra::VectorSpaceVector< double >.

Definition at line 255 of file trilinos_epetra_vector.cc.

◆ add() [3/3]

void Vector< Number >::add	(	const double	a,
		const VectorSpaceVector< double > &	V,
		const double	b,
		const VectorSpaceVector< double > &	W
	)

virtual

Multiple addition of multiple of a vector, i.e. *this> += a*V+b*W. The vectors need to have the same layout.

Implements LinearAlgebra::VectorSpaceVector< double >.

Definition at line 274 of file trilinos_epetra_vector.cc.

◆ sadd()

void Vector< Number >::sadd	(	const double	s,
		const double	a,
		const VectorSpaceVector< double > &	V
	)

virtual

Scaling and simple addition of a multiple of a vector, i.e. *this = s*(*this)+a*V.

Implements LinearAlgebra::VectorSpaceVector< double >.

Definition at line 303 of file trilinos_epetra_vector.cc.

◆ scale()

void Vector< Number >::scale ( const VectorSpaceVector< double > & scaling_factors )

virtual

Scale each element of this vector by the corresponding element in the argument. This function is mostly meant to simulate multiplication (and immediate re-assignement) by a diagonal scaling matrix. The vectors need to have the same layout.

Implements LinearAlgebra::VectorSpaceVector< double >.

Definition at line 320 of file trilinos_epetra_vector.cc.

◆ equ()

void Vector< Number >::equ	(	const double	a,
		const VectorSpaceVector< double > &	V
	)

virtual

Assignement *this = a*V.

Implements LinearAlgebra::VectorSpaceVector< double >.

Definition at line 340 of file trilinos_epetra_vector.cc.

◆ mean_value()

double Vector< Number >::mean_value ( ) const

virtual

Return the mean value of the element of this vector.

Implements LinearAlgebra::VectorSpaceVector< double >.

Definition at line 362 of file trilinos_epetra_vector.cc.

◆ l1_norm()

double Vector< Number >::l1_norm ( ) const

virtual

Return the l₁ norm of the vector (i.e., the sum of the absolute values of all entries among all processors).

Implements LinearAlgebra::VectorSpaceVector< double >.

Definition at line 375 of file trilinos_epetra_vector.cc.

◆ l2_norm()

double Vector< Number >::l2_norm ( ) const

virtual

Return the l₂ norm of the vector (i.e., the square root of the sum of the square of all entries among all processors).

Implements LinearAlgebra::VectorSpaceVector< double >.

Definition at line 387 of file trilinos_epetra_vector.cc.

◆ linfty_norm()

double Vector< Number >::linfty_norm ( ) const

virtual

Return the maximum norm of the vector (i.e., the maximum absolute value among all entries and among all processors).

Implements LinearAlgebra::VectorSpaceVector< double >.

Definition at line 399 of file trilinos_epetra_vector.cc.

◆ add_and_dot()

double Vector< Number >::add_and_dot	(	const double	a,
		const VectorSpaceVector< double > &	V,
		const VectorSpaceVector< double > &	W
	)

virtual

Performs a combined operation of a vector addition and a subsequent inner product, returning the value of the inner product. In other words, the result of this function is the same as if the user called

this->add(a, V);

return_value = *this * W;

The reason this function exists is that this operation involves less memory transfer than calling the two functions separately. This method only needs to load three vectors, this, V, W, whereas calling separate methods means to load the calling vector this twice. Since most vector operations are memory transfer limited, this reduces the time by 25% (or 50% if W equals this).

The vectors need to have the same layout.

Implements LinearAlgebra::VectorSpaceVector< double >.

Definition at line 411 of file trilinos_epetra_vector.cc.

◆ size()

Vector::size_type Vector< Number >::size ( ) const

virtual

Return the global size of the vector, equal to the sum of the number of locally owned indices among all processors.

Implements LinearAlgebra::VectorSpaceVector< double >.

Definition at line 422 of file trilinos_epetra_vector.cc.

◆ get_mpi_communicator()

MPI_Comm Vector< Number >::get_mpi_communicator ( ) const

Return the MPI communicator object in use with this object.

Definition at line 433 of file trilinos_epetra_vector.cc.

◆ locally_owned_elements()

IndexSet Vector< Number >::locally_owned_elements ( ) const

virtual

Return an index set that describes which elements of this vector are owned by the current processor. As a consequence, the index sets returned on different procesors if this is a distributed vector will form disjoint sets that add up to the complete index set. Obviously, if a vector is created on only one processor, then the result would satisfy

vec.locally_owned_elements() == complete_index_set(vec.size())

Implements LinearAlgebra::VectorSpaceVector< double >.

Definition at line 443 of file trilinos_epetra_vector.cc.

◆ trilinos_vector() [1/2]

const Epetra_FEVector & Vector< Number >::trilinos_vector ( ) const

Return a const reference to the underlying Trilinos Epetra_FEVector class.

Definition at line 473 of file trilinos_epetra_vector.cc.

◆ trilinos_vector() [2/2]

Epetra_FEVector & Vector< Number >::trilinos_vector ( )

Return a (modifyable) reference to the underlying Trilinos Epetra_FEVector class.

Definition at line 480 of file trilinos_epetra_vector.cc.

◆ print()

void Vector< Number >::print	(	std::ostream &	out,
		const unsigned int	precision = `3`,
		const bool	scientific = `true`,
		const bool	across = `true`
	)		const

virtual

Prints the vector to the output stream out.

Implements LinearAlgebra::VectorSpaceVector< double >.

Definition at line 487 of file trilinos_epetra_vector.cc.

◆ memory_consumption()

std::size_t Vector< Number >::memory_consumption ( ) const

virtual

Return the memory consumption of this class in bytes.

Implements LinearAlgebra::VectorSpaceVector< double >.

Definition at line 524 of file trilinos_epetra_vector.cc.

◆ create_epetra_comm_pattern()

void Vector< Number >::create_epetra_comm_pattern	(	const IndexSet &	source_index_set,
		const MPI_Comm &	mpi_comm
	)

private

Create the CommunicationPattern for the communication between the IndexSet source_index_set and the current vector based on the communicator mpi_comm.

Definition at line 533 of file trilinos_epetra_vector.cc.

Member Data Documentation

◆ vector

std_cxx11::shared_ptr<Epetra_FEVector> LinearAlgebra::EpetraWrappers::Vector::vector

private

Pointer to the actual Epetra vector object.

Definition at line 299 of file trilinos_epetra_vector.h.

◆ source_stored_elements

::IndexSet LinearAlgebra::EpetraWrappers::Vector::source_stored_elements

private

IndexSet of the elements of the last imported vector.

Definition at line 304 of file trilinos_epetra_vector.h.

◆ epetra_comm_pattern

std_cxx11::shared_ptr<const CommunicationPattern> LinearAlgebra::EpetraWrappers::Vector::epetra_comm_pattern

private

CommunicationPattern for the communication between the source_stored_elements IndexSet and the current vector.

Definition at line 310 of file trilinos_epetra_vector.h.

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

deal.II/lac/trilinos_epetra_vector.h
source/lac/trilinos_epetra_vector.cc

Public Member Functions

Static Public Member Functions

Private Member Functions

Private Attributes

Detailed Description

Constructor & Destructor Documentation

◆ Vector() [1/3]

◆ Vector() [2/3]

◆ Vector() [3/3]

Member Function Documentation

◆ reinit()

◆ operator=()

◆ import()

◆ operator*=()

◆ operator/=()

◆ operator+=()

◆ operator-=()

◆ operator*()

◆ add() [1/3]

◆ add() [2/3]

◆ add() [3/3]

◆ sadd()

◆ scale()

◆ equ()

◆ mean_value()

◆ l1_norm()

◆ l2_norm()

◆ linfty_norm()

◆ add_and_dot()

◆ size()

◆ get_mpi_communicator()

◆ locally_owned_elements()

◆ trilinos_vector() [1/2]

◆ trilinos_vector() [2/2]

◆ print()

◆ memory_consumption()

◆ create_epetra_comm_pattern()

Member Data Documentation

◆ vector

◆ source_stored_elements

◆ epetra_comm_pattern