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

Inheritance diagram for LinearAlgebra::distributed::BlockVector< Number >:

Public Types
using	BaseClass = BlockVectorBase< Vector< Number > >

using	BlockType = typename BaseClass::BlockType

using	value_type = typename BaseClass::value_type

using	real_type = typename BaseClass::real_type

using	pointer = typename BaseClass::pointer

using	const_pointer = typename BaseClass::const_pointer

using	reference = typename BaseClass::reference

using	const_reference = typename BaseClass::const_reference

using	size_type = typename BaseClass::size_type

using	iterator = typename BaseClass::iterator

using	const_iterator = typename BaseClass::const_iterator

Public Member Functions
void	collect_sizes ()

BlockType &	block (const unsigned int i)

const BlockType &	block (const unsigned int i) const

const BlockIndices &	get_block_indices () const

unsigned int	n_blocks () const

std::size_t	locally_owned_size () const

iterator	begin ()

const_iterator	begin () const

iterator	end ()

const_iterator	end () const

value_type	operator() (const size_type i) const

reference	operator() (const size_type i)

value_type	operator[] (const size_type i) const

reference	operator[] (const size_type i)

void	extract_subvector_to (const std::vector< size_type > &indices, std::vector< OtherNumber > &values) const

void	extract_subvector_to (ForwardIterator indices_begin, const ForwardIterator indices_end, OutputIterator values_begin) const

bool	operator== (const BlockVectorBase< VectorType2 > &v) const

value_type	operator* (const BlockVectorBase &V) const

value_type	add_and_dot (const value_type a, const BlockVectorBase &V, const BlockVectorBase &W)

bool	in_local_range (const size_type global_index) const

bool	is_non_negative () const

BlockVectorBase &	operator+= (const BlockVectorBase &V)

BlockVectorBase &	operator-= (const BlockVectorBase &V)

void	add (const std::vector< size_type > &indices, const Vector< Number > &values)

void	add (const size_type n_elements, const size_type indices, const Number values)

void	add (const value_type s)

void	add (const value_type a, const BlockVectorBase &V)

void	add (const value_type a, const BlockVectorBase &V, const value_type b, const BlockVectorBase &W)

void	sadd (const value_type s, const BlockVectorBase &V)

void	sadd (const value_type s, const value_type a, const BlockVectorBase &V)

void	sadd (const value_type s, const value_type a, const BlockVectorBase &V, const value_type b, const BlockVectorBase &W)

void	sadd (const value_type s, const value_type a, const BlockVectorBase &V, const value_type b, const BlockVectorBase &W, const value_type c, const BlockVectorBase &X)

BlockVectorBase &	operator*= (const value_type factor)

BlockVectorBase &	operator/= (const value_type factor)

void	scale (const BlockVector2 &v)

void	equ (const value_type a, const BlockVector2 &V)

virtual void	compress (VectorOperation::values)

1: Basic operations
	BlockVector (const size_type num_blocks=0, const size_type block_size=0)

	BlockVector (const BlockVector< Number > &V)

template<typename OtherNumber >
	BlockVector (const BlockVector< OtherNumber > &v)

	BlockVector (const std::vector< size_type > &block_sizes)

	BlockVector (const std::vector< IndexSet > &local_ranges, const std::vector< IndexSet > &ghost_indices, const MPI_Comm &communicator)

	BlockVector (const std::vector< IndexSet > &local_ranges, const MPI_Comm &communicator)

virtual	~BlockVector () override=default

virtual BlockVector &	operator= (const value_type s) override

BlockVector &	operator= (const BlockVector &V)

template<class Number2 >
BlockVector &	operator= (const BlockVector< Number2 > &V)

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

BlockVector< Number > &	operator= (const PETScWrappers::MPI::BlockVector &petsc_vec)

BlockVector< Number > &	operator= (const TrilinosWrappers::MPI::BlockVector &trilinos_vec)

void	reinit (const size_type num_blocks, const size_type block_size=0, const bool omit_zeroing_entries=false)

void	reinit (const std::vector< size_type > &N, const bool omit_zeroing_entries=false)

template<typename Number2 >
void	reinit (const BlockVector< Number2 > &V, const bool omit_zeroing_entries=false)

virtual void	compress (::VectorOperation::values operation) override

void	update_ghost_values () const

void	zero_out_ghosts () const

void	zero_out_ghost_values () const

bool	has_ghost_elements () const

template<typename OtherNumber >
void	add (const std::vector< size_type > &indices, const ::Vector< OtherNumber > &values)

void	sadd (const Number s, const BlockVector< Number > &V)

virtual bool	all_zero () const override

virtual Number	mean_value () const override

real_type	lp_norm (const real_type p) const

void	swap (BlockVector< Number > &v)

Static Public Attributes
static constexpr unsigned int	communication_block_size = 20

Protected Attributes
std::vector< Vector< Number > >	components

BlockIndices	block_indices

2: Implementation of VectorSpaceVector
virtual void	reinit (const VectorSpaceVector< Number > &V, const bool omit_zeroing_entries=false) override

virtual BlockVector< Number > &	operator*= (const Number factor) override

virtual BlockVector< Number > &	operator/= (const Number factor) override

virtual BlockVector< Number > &	operator+= (const VectorSpaceVector< Number > &V) override

virtual BlockVector< Number > &	operator-= (const VectorSpaceVector< Number > &V) override

virtual void	import (const LinearAlgebra::ReadWriteVector< Number > &V, VectorOperation::values operation, std::shared_ptr< const Utilities::MPI::CommunicationPatternBase > communication_pattern={}) override

virtual Number	operator* (const VectorSpaceVector< Number > &V) const override

template<typename FullMatrixType >
void	multivector_inner_product (FullMatrixType &matrix, const BlockVector< Number > &V, const bool symmetric=false) const

template<typename FullMatrixType >
Number	multivector_inner_product_with_metric (const FullMatrixType &matrix, const BlockVector< Number > &V, const bool symmetric=false) const

template<typename FullMatrixType >
void	mmult (BlockVector< Number > &V, const FullMatrixType &matrix, const Number s=Number(0.), const Number b=Number(1.)) const

virtual void	add (const Number a) override

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

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

virtual void	add (const std::vector< size_type > &indices, const std::vector< Number > &values)

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

virtual void	scale (const VectorSpaceVector< Number > &scaling_factors) override

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

virtual real_type	l1_norm () const override

virtual real_type	l2_norm () const override

real_type	norm_sqr () const

virtual real_type	linfty_norm () const override

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

virtual size_type	size () const override

virtual ::IndexSet	locally_owned_elements () const override

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

virtual std::size_t	memory_consumption () const override

static ::ExceptionBase &	ExcVectorTypeNotCompatible ()

static ::ExceptionBase &	ExcIteratorRangeDoesNotMatchVectorSize ()

Subscriptor functionality
Classes derived from Subscriptor provide a facility to subscribe to this object. This is mostly used by the SmartPointer class.
void	subscribe (std::atomic< bool > *const validity, const std::string &identifier="") const

void	unsubscribe (std::atomic< bool > *const validity, const std::string &identifier="") const

unsigned int	n_subscriptions () const

template<typename StreamType >
void	list_subscribers (StreamType &stream) const

void	list_subscribers () const

template<class Archive >
void	serialize (Archive &ar, const unsigned int version)

static ::ExceptionBase &	ExcInUse (int arg1, std::string arg2, std::string arg3)

static ::ExceptionBase &	ExcNoSubscriber (std::string arg1, std::string arg2)

using	map_value_type = decltype(counter_map)::value_type

using	map_iterator = decltype(counter_map)::iterator

std::atomic< unsigned int >	counter

std::map< std::string, unsigned int >	counter_map

std::vector< std::atomic< bool > * >	validity_pointers

const std::type_info *	object_info

static std::mutex	mutex

void	check_no_subscribers () const noexcept

Detailed Description

template<typename Number>
class LinearAlgebra::distributed::BlockVector< Number >

An implementation of block vectors based on distributed deal.II vectors. While the base class provides for most of the interface, this class handles the actual allocation of vectors and provides functions that are specific to the underlying vector type.

Note: Instantiations for this template are provided for <float> and <double>; others can be generated in application programs (see the section on Template instantiations in the manual).

See also: Block (linear algebra)

Definition at line 84 of file la_parallel_block_vector.h.

Member Function Documentation

◆ collect_sizes()

void BlockVectorBase< Vector< Number > >::collect_sizes ( )

inherited

Update internal structures after resizing vectors. Whenever you reinited a block of a block vector, the internal data structures are corrupted. Therefore, you should call this function after all blocks got their new size.

◆ block() [1/2]

BlockType & BlockVectorBase< Vector< Number > >::block ( const unsigned int i )

inherited

Access to a single block.

◆ block() [2/2]

const BlockType & BlockVectorBase< Vector< Number > >::block ( const unsigned int i ) const

inherited

Read-only access to a single block.

◆ get_block_indices()

const BlockIndices & BlockVectorBase< Vector< Number > >::get_block_indices ( ) const

inherited

Return a reference on the object that describes the mapping between block and global indices. The use of this function is highly deprecated and it should vanish in one of the next versions

◆ n_blocks()

unsigned int BlockVectorBase< Vector< Number > >::n_blocks ( ) const

inherited

Number of blocks.

◆ locally_owned_size()

std::size_t BlockVectorBase< Vector< Number > >::locally_owned_size ( ) const

inherited

Return local dimension of the vector. This is the sum of the local dimensions (i.e., values stored on the current processor) of all components.

◆ begin() [1/2]

iterator BlockVectorBase< Vector< Number > >::begin ( )

inherited

Return an iterator pointing to the first element.

◆ begin() [2/2]

const_iterator BlockVectorBase< Vector< Number > >::begin ( ) const

inherited

Return an iterator pointing to the first element of a constant block vector.

◆ end() [1/2]

iterator BlockVectorBase< Vector< Number > >::end ( )

inherited

Return an iterator pointing to the element past the end.

◆ end() [2/2]

const_iterator BlockVectorBase< Vector< Number > >::end ( ) const

inherited

Return an iterator pointing to the element past the end of a constant block vector.

◆ operator()() [1/2]

value_type BlockVectorBase< Vector< Number > >::operator() ( const size_type i ) const

inherited

Access components, returns U(i).

◆ operator()() [2/2]

reference BlockVectorBase< Vector< Number > >::operator() ( const size_type i )

inherited

Access components, returns U(i) as a writeable reference.

◆ operator[]() [1/2]

value_type BlockVectorBase< Vector< Number > >::operator[] ( const size_type i ) const

inherited

Access components, returns U(i).

Exactly the same as operator().

◆ operator[]() [2/2]

reference BlockVectorBase< Vector< Number > >::operator[] ( const size_type i )

inherited

Access components, returns U(i) as a writeable reference.

Exactly the same as operator().

◆ extract_subvector_to() [1/2]

void BlockVectorBase< Vector< Number > >::extract_subvector_to	(	const std::vector< size_type > &	indices,
		std::vector< OtherNumber > &	values
	)		const

inherited

Instead of getting individual elements of a vector via operator(), this function allows getting a whole set of elements at once. The indices of the elements to be read are stated in the first argument, the corresponding values are returned in the second.

If the current vector is called v, then this function is the equivalent to the code

for (unsigned int i=0; i<indices.size(); ++i)

values[i] = v[indices[i]];

EvaluationFlags::values

@ values

Definition: evaluation_flags.h:51

Precondition: The sizes of the indices and values arrays must be identical.

◆ extract_subvector_to() [2/2]

void BlockVectorBase< Vector< Number > >::extract_subvector_to	(	ForwardIterator	indices_begin,
		const ForwardIterator	indices_end,
		OutputIterator	values_begin
	)		const

inherited

Instead of getting individual elements of a vector via operator(), this function allows getting a whole set of elements at once. In contrast to the previous function, this function obtains the indices of the elements by dereferencing all elements of the iterator range provided by the first two arguments, and puts the vector values into memory locations obtained by dereferencing a range of iterators starting at the location pointed to by the third argument.

If the current vector is called v, then this function is the equivalent to the code

ForwardIterator indices_p = indices_begin;
OutputIterator  values_p  = values_begin;
while (indices_p != indices_end)
{
  *values_p = v[*indices_p];
  ++indices_p;
  ++values_p;
}

Precondition: It must be possible to write into as many memory locations starting at values_begin as there are iterators between indices_begin and indices_end.

◆ operator==()

bool BlockVectorBase< Vector< Number > >::operator== ( const BlockVectorBase< VectorType2 > & v ) const

inherited

Check for equality of two block vector types. This operation is only allowed if the two vectors already have the same block structure.

◆ operator*()

value_type BlockVectorBase< Vector< Number > >::operator* ( const BlockVectorBase< Vector< Number > > & V ) const

inherited

\(U = U * V\): scalar product.

◆ add_and_dot()

value_type BlockVectorBase< Vector< Number > >::add_and_dot	(	const value_type	a,
		const BlockVectorBase< Vector< Number > > &	V,
		const BlockVectorBase< Vector< Number > > &	W
	)

inherited

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;

LinearAlgebra::distributed::BlockVector::add

void add(const std::vector< size_type > &indices, const ::Vector< OtherNumber > &values)

LAPACKSupport::V

static const char V

Definition: lapack_support.h:177

The reason this function exists is that this operation involves less memory transfer than calling the two functions separately on deal.II's vector classes (Vector<Number> and LinearAlgebra::distributed::Vector<double>). 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).

For complex-valued vectors, the scalar product in the second step is implemented as \(\left<v,w\right>=\sum_i v_i \bar{w_i}\).

◆ in_local_range()

bool BlockVectorBase< Vector< Number > >::in_local_range ( const size_type global_index ) const

inherited

Return true if the given global index is in the local range of this processor. Asks the corresponding block.

◆ is_non_negative()

bool BlockVectorBase< Vector< Number > >::is_non_negative ( ) const

inherited

Return true if the vector has no negative entries, i.e. all entries are zero or positive. This function is used, for example, to check whether refinement indicators are really all positive (or zero).

◆ operator+=()

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

inherited

Addition operator. Fast equivalent to U.add(1, V).

◆ operator-=()

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

inherited

Subtraction operator. Fast equivalent to U.add(-1, V).

◆ add() [1/5]

void BlockVectorBase< Vector< Number > >::add	(	const std::vector< size_type > &	indices,
		const Vector< Number > &	values
	)

inherited

This is a second collective add operation. As a difference, this function takes a deal.II vector of values.

◆ add() [2/5]

void BlockVectorBase< Vector< Number > >::add	(	const size_type	n_elements,
		const size_type *	indices,
		const Number *	values
	)

inherited

Take an address where n_elements are stored contiguously and add them into the vector. Handles all cases which are not covered by the other two add() functions above.

◆ add() [3/5]

void BlockVectorBase< Vector< Number > >::add ( const value_type s )

inherited

\(U(0-DIM)+=s\). Addition of s to all components. Note that s is a scalar and not a vector.

◆ add() [4/5]

void BlockVectorBase< Vector< Number > >::add	(	const value_type	a,
		const BlockVectorBase< Vector< Number > > &	V
	)

inherited

U+=a*V. Simple addition of a scaled vector.

◆ add() [5/5]

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

inherited

U+=a*V+b*W. Multiple addition of scaled vectors.

◆ sadd() [1/4]

void BlockVectorBase< Vector< Number > >::sadd	(	const value_type	s,
		const BlockVectorBase< Vector< Number > > &	V
	)

inherited

U=s*U+V. Scaling and simple vector addition.

◆ sadd() [2/4]

void BlockVectorBase< Vector< Number > >::sadd	(	const value_type	s,
		const value_type	a,
		const BlockVectorBase< Vector< Number > > &	V
	)

inherited

U=s*U+a*V. Scaling and simple addition.

◆ sadd() [3/4]

void BlockVectorBase< Vector< Number > >::sadd	(	const value_type	s,
		const value_type	a,
		const BlockVectorBase< Vector< Number > > &	V,
		const value_type	b,
		const BlockVectorBase< Vector< Number > > &	W
	)

inherited

U=s*U+a*V+b*W. Scaling and multiple addition.

◆ sadd() [4/4]

void BlockVectorBase< Vector< Number > >::sadd	(	const value_type	s,
		const value_type	a,
		const BlockVectorBase< Vector< Number > > &	V,
		const value_type	b,
		const BlockVectorBase< Vector< Number > > &	W,
		const value_type	c,
		const BlockVectorBase< Vector< Number > > &	X
	)

inherited

U=s*U+a*V+b*W+c*X. Scaling and multiple addition.

◆ operator*=()

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

inherited

Scale each element of the vector by a constant value.

◆ operator/=()

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

inherited

Scale each element of the vector by the inverse of the given value.

◆ scale()

void BlockVectorBase< Vector< Number > >::scale ( const BlockVector2 & v )

inherited

Multiply each element of this vector by the corresponding element of v.

◆ equ()

void BlockVectorBase< Vector< Number > >::equ	(	const value_type	a,
		const BlockVector2 &	V
	)

inherited

U=a*V. Assignment.

Member Data Documentation

◆ components

std::vector<Vector< Number > > BlockVectorBase< Vector< Number > >::components

protectedinherited

Pointer to the array of components.

Definition at line 949 of file block_vector_base.h.

◆ block_indices

BlockIndices BlockVectorBase< Vector< Number > >::block_indices

protectedinherited

Object managing the transformation between global indices and indices within the different blocks.

Definition at line 955 of file block_vector_base.h.

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

include/deal.II/lac/la_parallel_block_vector.h

Public Types

Public Member Functions

Static Public Attributes

Protected Attributes

2: Implementation of VectorSpaceVector

Subscriptor functionality

Detailed Description

Member Function Documentation

◆ collect_sizes()

◆ block() [1/2]

◆ block() [2/2]

◆ get_block_indices()

◆ n_blocks()

◆ locally_owned_size()

◆ begin() [1/2]

◆ begin() [2/2]

◆ end() [1/2]

◆ end() [2/2]

◆ operator()() [1/2]

◆ operator()() [2/2]

◆ operator[]() [1/2]

◆ operator[]() [2/2]

◆ extract_subvector_to() [1/2]

◆ extract_subvector_to() [2/2]

◆ operator==()

◆ operator*()

◆ add_and_dot()

◆ in_local_range()

◆ is_non_negative()

◆ operator+=()

◆ operator-=()

◆ add() [1/5]

◆ add() [2/5]

◆ add() [3/5]

◆ add() [4/5]

◆ add() [5/5]

◆ sadd() [1/4]

◆ sadd() [2/4]

◆ sadd() [3/4]

◆ sadd() [4/4]

◆ operator*=()

◆ operator/=()

◆ scale()

◆ equ()

Member Data Documentation

◆ components

◆ block_indices