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

Inheritance diagram for TrilinosWrappers::MPI::BlockVector:

Public Types
using	BaseClass = ::BlockVectorBase< MPI::Vector >

using	BlockType = BaseClass::BlockType

using	value_type = BaseClass::value_type

using	pointer = BaseClass::pointer

using	const_pointer = BaseClass::const_pointer

using	reference = BaseClass::reference

using	const_reference = BaseClass::const_reference

using	size_type = BaseClass::size_type

using	iterator = BaseClass::iterator

using	const_iterator = BaseClass::const_iterator

using	real_type = typename BlockType::real_type

Public Member Functions
	BlockVector ()=default

	BlockVector (const std::vector< IndexSet > &parallel_partitioning, const MPI_Comm communicator=MPI_COMM_WORLD)

	BlockVector (const std::vector< IndexSet > &parallel_partitioning, const std::vector< IndexSet > &ghost_values, const MPI_Comm communicator, const bool vector_writable=false)

	BlockVector (const BlockVector &v)

	BlockVector (BlockVector &&v) noexcept

	BlockVector (const size_type num_blocks)

	~BlockVector () override=default

BlockVector &	operator= (const value_type s)

BlockVector &	operator= (const BlockVector &v)

BlockVector &	operator= (BlockVector &&v) noexcept

template<typename Number >
BlockVector &	operator= (const ::BlockVector< Number > &v)

void	reinit (const std::vector< IndexSet > &parallel_partitioning, const MPI_Comm communicator=MPI_COMM_WORLD, const bool omit_zeroing_entries=false)

void	reinit (const std::vector< IndexSet > &partitioning, const std::vector< IndexSet > &ghost_values, const MPI_Comm communicator=MPI_COMM_WORLD, const bool vector_writable=false)

void	reinit (const std::vector< std::shared_ptr< const Utilities::MPI::Partitioner > > &partitioners, const bool make_ghosted=true, const bool vector_writable=false)

void	reinit (const BlockVector &V, const bool omit_zeroing_entries=false)

void	reinit (const size_type num_blocks)

void	import_nonlocal_data_for_fe (const TrilinosWrappers::BlockSparseMatrix &m, const BlockVector &v)

bool	has_ghost_elements () const

void	swap (BlockVector &v)

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

void	collect_sizes ()

void	compress (VectorOperation::values operation)

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	size () const

std::size_t	locally_owned_size () const

IndexSet	locally_owned_elements () 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

real_type	norm_sqr () const

value_type	mean_value () const

real_type	l1_norm () const

real_type	l2_norm () const

real_type	linfty_norm () 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	all_zero () 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 std::vector< Number > &values)

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)

void	update_ghost_values () const

std::size_t	memory_consumption () const

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

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

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

static ::ExceptionBase &	ExcNonMatchingBlockVectors ()

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

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

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

BlockIndices	block_indices

Private Types
using	map_value_type = decltype(counter_map)::value_type

using	map_iterator = decltype(counter_map)::iterator

Private Member Functions
void	check_no_subscribers () const noexcept

Private Attributes
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 Private Attributes
static std::mutex	mutex

Related Symbols
(Note that these are not member symbols.)
void	swap (BlockVector &u, BlockVector &v)

Detailed Description

An implementation of block vectors based on the vector class implemented in TrilinosWrappers. 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.

The model of distribution of data is such that each of the blocks is distributed across all MPI processes named in the MPI communicator. I.e. we don't just distribute the whole vector, but each component. In the constructors and reinit() functions, one therefore not only has to specify the sizes of the individual blocks, but also the number of elements of each of these blocks to be stored on the local process.

@ Block (linear algebra)

Definition at line 75 of file trilinos_parallel_block_vector.h.

Member Typedef Documentation

◆ BaseClass

using TrilinosWrappers::MPI::BlockVector::BaseClass = ::BlockVectorBase<MPI::Vector>

Typedef the base class for simpler access to its own alias.

Definition at line 81 of file trilinos_parallel_block_vector.h.

◆ BlockType

using TrilinosWrappers::MPI::BlockVector::BlockType = BaseClass::BlockType

Typedef the type of the underlying vector.

Definition at line 86 of file trilinos_parallel_block_vector.h.

◆ value_type

using TrilinosWrappers::MPI::BlockVector::value_type = BaseClass::value_type

Import the alias from the base class.

Definition at line 91 of file trilinos_parallel_block_vector.h.

◆ pointer

using TrilinosWrappers::MPI::BlockVector::pointer = BaseClass::pointer

Definition at line 92 of file trilinos_parallel_block_vector.h.

◆ const_pointer

using TrilinosWrappers::MPI::BlockVector::const_pointer = BaseClass::const_pointer

Definition at line 93 of file trilinos_parallel_block_vector.h.

◆ reference

using TrilinosWrappers::MPI::BlockVector::reference = BaseClass::reference

Definition at line 94 of file trilinos_parallel_block_vector.h.

◆ const_reference

using TrilinosWrappers::MPI::BlockVector::const_reference = BaseClass::const_reference

Definition at line 95 of file trilinos_parallel_block_vector.h.

◆ size_type

using TrilinosWrappers::MPI::BlockVector::size_type = BaseClass::size_type

Definition at line 96 of file trilinos_parallel_block_vector.h.

◆ iterator

using TrilinosWrappers::MPI::BlockVector::iterator = BaseClass::iterator

Definition at line 97 of file trilinos_parallel_block_vector.h.

◆ const_iterator

using TrilinosWrappers::MPI::BlockVector::const_iterator = BaseClass::const_iterator

Definition at line 98 of file trilinos_parallel_block_vector.h.

◆ real_type

using BlockVectorBase< MPI::Vector >::real_type = typename BlockType::real_type

inherited

Declare a type that has holds real-valued numbers with the same precision as the template argument to this class. If the template argument of this class is a real data type, then real_type equals the template argument. If the template argument is a std::complex type then real_type equals the type underlying the complex numbers.

This alias is used to represent the return type of norms.

Definition at line 479 of file block_vector_base.h.

◆ map_value_type

using Subscriptor::map_value_type = decltype(counter_map)::value_type

privateinherited

The data type used in counter_map.

Definition at line 230 of file subscriptor.h.

◆ map_iterator

using Subscriptor::map_iterator = decltype(counter_map)::iterator

privateinherited

The iterator type used in counter_map.

Definition at line 235 of file subscriptor.h.

Constructor & Destructor Documentation

◆ BlockVector() [1/6]

TrilinosWrappers::MPI::BlockVector::BlockVector ( )

default

Default constructor. Generate an empty vector without any blocks.

◆ BlockVector() [2/6]

BlockVector< Number >::BlockVector	(	const std::vector< IndexSet > &	parallel_partitioning,
		const MPI_Comm	communicator = `MPI_COMM_WORLD`
	)

inlineexplicit

Constructor. Generate a block vector with as many blocks as there are entries in partitioning. Each IndexSet together with the MPI communicator contains the layout of the distribution of data among the MPI processes.

Definition at line 334 of file trilinos_parallel_block_vector.h.

◆ BlockVector() [3/6]

BlockVector< Number >::BlockVector	(	const std::vector< IndexSet > &	parallel_partitioning,
		const std::vector< IndexSet > &	ghost_values,
		const MPI_Comm	communicator,
		const bool	vector_writable = `false`
	)

inline

Creates a BlockVector with ghost elements. See the respective reinit() method for more details. ghost_values may contain any elements in parallel_partitioning, they will be ignored.

Definition at line 343 of file trilinos_parallel_block_vector.h.

◆ BlockVector() [4/6]

BlockVector< Number >::BlockVector ( const BlockVector & v )

inline

Copy-Constructor. Set all the properties of the parallel vector to those of the given argument and copy the elements.

Definition at line 364 of file trilinos_parallel_block_vector.h.

◆ BlockVector() [5/6]

BlockVector< Number >::BlockVector ( BlockVector && v )

inlinenoexcept

Move constructor. Creates a new vector by stealing the internal data of the vector v.

Definition at line 378 of file trilinos_parallel_block_vector.h.

◆ BlockVector() [6/6]

BlockVector< Number >::BlockVector ( const size_type num_blocks )

inlineexplicit

Creates a block vector consisting of num_blocks components, but there is no content in the individual components and the user has to fill appropriate data using a reinit of the blocks.

Definition at line 357 of file trilinos_parallel_block_vector.h.

◆ ~BlockVector()

TrilinosWrappers::MPI::BlockVector::~BlockVector ( )

overridedefault

Destructor. Clears memory

Member Function Documentation

◆ operator=() [1/4]

BlockVector & BlockVector< Number >::operator= ( const value_type s )

Copy operator: fill all components of the vector that are locally stored with the given scalar value.

Definition at line 31 of file trilinos_block_vector.cc.

◆ operator=() [2/4]

BlockVector & BlockVector< Number >::operator= ( const BlockVector & v )

Copy operator for arguments of the same type.

Definition at line 40 of file trilinos_block_vector.cc.

◆ operator=() [3/4]

BlockVector & BlockVector< Number >::operator= ( BlockVector && v )

noexcept

Move the given vector. This operator replaces the present vector with v by efficiently swapping the internal data structures.

Definition at line 62 of file trilinos_block_vector.cc.

◆ operator=() [4/4]

template<typename Number >

BlockVector & BlockVector< Number >::operator= ( const ::BlockVector< Number > & v )

Another copy function. This one takes a deal.II block vector and copies it into a TrilinosWrappers block vector. Note that the number of blocks has to be the same in the vector as in the input vector. Use the reinit() command for resizing the BlockVector or for changing the internal structure of the block components.

Since Trilinos only works on doubles, this function is limited to accept only one possible number type in the deal.II vector.

Definition at line 389 of file trilinos_parallel_block_vector.h.

◆ reinit() [1/5]

void BlockVector< Number >::reinit	(	const std::vector< IndexSet > &	parallel_partitioning,
		const MPI_Comm	communicator = `MPI_COMM_WORLD`,
		const bool	omit_zeroing_entries = `false`
	)

Reinitialize the BlockVector to contain as many blocks as there are index sets given in the input argument, according to the parallel distribution of the individual components described in the maps.

If omit_zeroing_entries==false, the vector is filled with zeros.

Definition at line 71 of file trilinos_block_vector.cc.

◆ reinit() [2/5]

void BlockVector< Number >::reinit	(	const std::vector< IndexSet > &	partitioning,
		const std::vector< IndexSet > &	ghost_values,
		const MPI_Comm	communicator = `MPI_COMM_WORLD`,
		const bool	vector_writable = `false`
	)

Reinit functionality. This function destroys the old vector content and generates a new one based on the input partitioning. In addition to just specifying one index set as in all the other methods above, this method allows to supply an additional set of ghost entries. There are two different versions of a vector that can be created. If the flag vector_writable is set to false, the vector only allows read access to the joint set of parallel_partitioning and ghost_entries. The effect of the reinit method is then equivalent to calling the other reinit method with an index set containing both the locally owned entries and the ghost entries.

If the flag vector_writable is set to true, this creates an alternative storage scheme for ghost elements that allows multiple threads to write into the vector (for the other reinit methods, only one thread is allowed to write into the ghost entries at a time).

Definition at line 92 of file trilinos_block_vector.cc.

◆ reinit() [3/5]

void BlockVector< Number >::reinit	(	const std::vector< std::shared_ptr< const Utilities::MPI::Partitioner > > &	partitioners,
		const bool	make_ghosted = `true`,
		const bool	vector_writable = `false`
	)

Initialize each block given to each parallel partitioning described in partitioners.

You can decide whether your vector will contain ghost elements with make_ghosted.

The parameter vector_writable only has effect on ghosted vectors and is ignored for non-ghosted vectors.

Definition at line 117 of file trilinos_block_vector.cc.

◆ reinit() [4/5]

void BlockVector< Number >::reinit	(	const BlockVector &	V,
		const bool	omit_zeroing_entries = `false`
	)

Change the dimension to that of the vector V. The same applies as for the other reinit() function.

The elements of V are not copied, i.e. this function is the same as calling reinit (V.size(), omit_zeroing_entries).

Note that you must call this (or the other reinit() functions) function, rather than calling the reinit() functions of an individual block, to allow the block vector to update its caches of vector sizes. If you call reinit() on one of the blocks, then subsequent actions on this object may yield unpredictable results since they may be routed to the wrong block.

Definition at line 140 of file trilinos_block_vector.cc.

◆ reinit() [5/5]

void BlockVector< Number >::reinit ( const size_type num_blocks )

Change the number of blocks to num_blocks. The individual blocks will get initialized with zero size, so it is assumed that the user resizes the individual blocks by herself in an appropriate way, and calls collect_sizes afterwards.

Definition at line 157 of file trilinos_block_vector.cc.

◆ import_nonlocal_data_for_fe()

void BlockVector< Number >::import_nonlocal_data_for_fe	(	const TrilinosWrappers::BlockSparseMatrix &	m,
		const BlockVector &	v
	)

This reinit function is meant to be used for parallel calculations where some non-local data has to be used. The typical situation where one needs this function is the call of the FEValues<dim>::get_function_values function (or of some derivatives) in parallel. Since it is usually faster to retrieve the data in advance, this function can be called before the assembly forks out to the different processors. What this function does is the following: It takes the information in the columns of the given matrix and looks which data couples between the different processors. That data is then queried from the input vector. Note that you should not write to the resulting vector any more, since the some data can be stored several times on different processors, leading to unpredictable results. In particular, such a vector cannot be used for matrix- vector products as for example done during the solution of linear systems.

Definition at line 169 of file trilinos_block_vector.cc.

◆ has_ghost_elements()

bool BlockVector< Number >::has_ghost_elements ( ) const

inline

Return if this Vector contains ghost elements.

See also: vectors with ghost elements

Definition at line 411 of file trilinos_parallel_block_vector.h.

◆ swap()

void BlockVector< Number >::swap ( BlockVector & v )

inline

Swap the contents of this vector and the other vector v. One could do this operation with a temporary variable and copying over the data elements, but this function is significantly more efficient since it only swaps the pointers to the data of the two vectors and therefore does not need to allocate temporary storage and move data around.

Limitation: right now this function only works if both vectors have the same number of blocks. If needed, the numbers of blocks should be exchanged, too.

This function is analogous to the swap() function of all C++ standard containers. Also, there is a global function swap(u,v) that simply calls u.swap(v), again in analogy to standard functions.

Definition at line 424 of file trilinos_parallel_block_vector.h.

◆ print()

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

Print to a stream.

Definition at line 190 of file trilinos_block_vector.cc.

◆ collect_sizes()

void BlockVectorBase< MPI::Vector >::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.

◆ compress()

void BlockVectorBase< MPI::Vector >::compress ( VectorOperation::values operation )

inherited

Call the compress() function on all the subblocks of the vector.

This functionality only needs to be called if using MPI based vectors and exists in other objects for compatibility.

See Compressing distributed objects for more information.

◆ block() [1/2]

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

inherited

Access to a single block.

◆ block() [2/2]

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

inherited

Read-only access to a single block.

◆ get_block_indices()

const BlockIndices & BlockVectorBase< MPI::Vector >::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< MPI::Vector >::n_blocks ( ) const

inherited

Number of blocks.

◆ size()

std::size_t BlockVectorBase< MPI::Vector >::size ( ) const

inherited

Return dimension of the vector. This is the sum of the dimensions of all components.

◆ locally_owned_size()

std::size_t BlockVectorBase< MPI::Vector >::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.

◆ locally_owned_elements()

IndexSet BlockVectorBase< MPI::Vector >::locally_owned_elements ( ) const

inherited

Return an index set that describes which elements of this vector are owned by the current processor. Note that this index set does not include elements this vector may store locally as ghost elements but that are in fact owned by another processor. As a consequence, the index sets returned on different processors 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())

complete_index_set

IndexSet complete_index_set(const IndexSet::size_type N)

Definition index_set.h:1089

For block vectors, this function returns the union of the locally owned elements of the individual blocks, shifted by their respective index offsets.

◆ begin() [1/2]

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

inherited

Return an iterator pointing to the first element.

◆ begin() [2/2]

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

inherited

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

◆ end() [1/2]

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

inherited

Return an iterator pointing to the element past the end.

◆ end() [2/2]

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

inherited

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

◆ operator()() [1/2]

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

inherited

Access components, returns U(i).

◆ operator()() [2/2]

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

inherited

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

◆ operator[]() [1/2]

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

inherited

Access components, returns U(i).

Exactly the same as operator().

◆ operator[]() [2/2]

reference BlockVectorBase< MPI::Vector >::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< MPI::Vector >::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]];

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

◆ extract_subvector_to() [2/2]

void BlockVectorBase< MPI::Vector >::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< MPI::Vector >::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< MPI::Vector >::operator* ( const BlockVectorBase< MPI::Vector > & V ) const

inherited

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

◆ norm_sqr()

real_type BlockVectorBase< MPI::Vector >::norm_sqr ( ) const

inherited

Return the square of the \(l_2\)-norm.

◆ mean_value()

value_type BlockVectorBase< MPI::Vector >::mean_value ( ) const

inherited

Return the mean value of the elements of this vector.

◆ l1_norm()

real_type BlockVectorBase< MPI::Vector >::l1_norm ( ) const

inherited

Return the \(l_1\)-norm of the vector, i.e. the sum of the absolute values.

◆ l2_norm()

real_type BlockVectorBase< MPI::Vector >::l2_norm ( ) const

inherited

Return the \(l_2\)-norm of the vector, i.e. the square root of the sum of the squares of the elements.

◆ linfty_norm()

real_type BlockVectorBase< MPI::Vector >::linfty_norm ( ) const

inherited

Return the maximum absolute value of the elements of this vector, which is the \(l_\infty\)-norm of a vector.

◆ add_and_dot()

value_type BlockVectorBase< MPI::Vector >::add_and_dot	(	const value_type	a,
		const BlockVectorBase< MPI::Vector > &	V,
		const BlockVectorBase< MPI::Vector > &	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;

BlockVectorBase< MPI::Vector >::add

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

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< MPI::Vector >::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.

◆ all_zero()

bool BlockVectorBase< MPI::Vector >::all_zero ( ) const

inherited

Return whether the vector contains only elements with value zero. This function is mainly for internal consistency check and should seldom be used when not in debug mode since it uses quite some time.

◆ is_non_negative()

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

inherited

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

◆ operator-=()

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

inherited

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

◆ add() [1/6]

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

inherited

A collective add operation: This function adds a whole set of values stored in values to the vector components specified by indices.

◆ add() [2/6]

void BlockVectorBase< MPI::Vector >::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() [3/6]

void BlockVectorBase< MPI::Vector >::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() [4/6]

void BlockVectorBase< MPI::Vector >::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() [5/6]

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

inherited

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

◆ add() [6/6]

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

inherited

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

◆ sadd() [1/4]

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

inherited

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

◆ sadd() [2/4]

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

inherited

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

◆ sadd() [3/4]

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

inherited

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

◆ sadd() [4/4]

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

inherited

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

◆ operator*=()

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

inherited

Scale each element of the vector by a constant value.

◆ operator/=()

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

inherited

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

◆ scale()

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

inherited

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

◆ equ()

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

inherited

U=a*V. Assignment.

◆ update_ghost_values()

void BlockVectorBase< MPI::Vector >::update_ghost_values ( ) const

inherited

Update the ghost values by calling update_ghost_values for each block.

◆ memory_consumption()

std::size_t BlockVectorBase< MPI::Vector >::memory_consumption ( ) const

inherited

Determine an estimate for the memory consumption (in bytes) of this object.

◆ subscribe()

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

inherited

Subscribes a user of the object by storing the pointer validity. The subscriber may be identified by text supplied as identifier.

Definition at line 136 of file subscriptor.cc.

◆ unsubscribe()

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

inherited

Unsubscribes a user from the object.

Note: The identifier and the validity pointer must be the same as the one supplied to subscribe().

Definition at line 156 of file subscriptor.cc.

◆ n_subscriptions()

unsigned int Subscriptor::n_subscriptions ( ) const

inlineinherited

Return the present number of subscriptions to this object. This allows to use this class for reference counted lifetime determination where the last one to unsubscribe also deletes the object.

Definition at line 300 of file subscriptor.h.

◆ list_subscribers() [1/2]

template<typename StreamType >

void Subscriptor::list_subscribers ( StreamType & stream ) const

inlineinherited

List the subscribers to the input stream.

Definition at line 317 of file subscriptor.h.

◆ list_subscribers() [2/2]

void Subscriptor::list_subscribers ( ) const

inherited

List the subscribers to deallog.

Definition at line 204 of file subscriptor.cc.

◆ serialize()

template<class Archive >

void Subscriptor::serialize	(	Archive &	ar,
		const unsigned int	version
	)

inlineinherited

Read or write the data of this object to or from a stream for the purpose of serialization using the BOOST serialization library.

This function does not actually serialize any of the member variables of this class. The reason is that what this class stores is only who subscribes to this object, but who does so at the time of storing the contents of this object does not necessarily have anything to do with who subscribes to the object when it is restored. Consequently, we do not want to overwrite the subscribers at the time of restoring, and then there is no reason to write the subscribers out in the first place.

Definition at line 309 of file subscriptor.h.

◆ check_no_subscribers()

void Subscriptor::check_no_subscribers ( ) const

privatenoexceptinherited

Check that there are no objects subscribing to this object. If this check passes then it is safe to destroy the current object. It this check fails then this function will either abort or print an error message to deallog (by using the AssertNothrow mechanism), but will not throw an exception.

Note: Since this function is just a consistency check it does nothing in release mode.; If this function is called when there is an uncaught exception then, rather than aborting, this function prints an error message to the standard error stream and returns.

Definition at line 53 of file subscriptor.cc.

Friends And Related Symbol Documentation

◆ swap()

void swap	(	BlockVector &	u,
		BlockVector &	v
	)

Definition at line 441 of file trilinos_parallel_block_vector.h.

Member Data Documentation

◆ components

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

protectedinherited

Pointer to the array of components.

Definition at line 958 of file block_vector_base.h.

◆ block_indices

BlockIndices BlockVectorBase< MPI::Vector >::block_indices

protectedinherited

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

Definition at line 964 of file block_vector_base.h.

◆ counter

std::atomic<unsigned int> Subscriptor::counter

mutableprivateinherited

Store the number of objects which subscribed to this object. Initially, this number is zero, and upon destruction it shall be zero again (i.e. all objects which subscribed should have unsubscribed again).

The creator (and owner) of an object is counted in the map below if HE manages to supply identification.

We use the mutable keyword in order to allow subscription to constant objects also.

This counter may be read from and written to concurrently in multithreaded code: hence we use the std::atomic class template.

Definition at line 219 of file subscriptor.h.

◆ counter_map

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

mutableprivateinherited

In this map, we count subscriptions for each different identification string supplied to subscribe().

Definition at line 225 of file subscriptor.h.

◆ validity_pointers

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

mutableprivateinherited

In this vector, we store pointers to the validity bool in the SmartPointer objects that subscribe to this class.

Definition at line 241 of file subscriptor.h.

◆ object_info

const std::type_info* Subscriptor::object_info

mutableprivateinherited

Pointer to the typeinfo object of this object, from which we can later deduce the class name. Since this information on the derived class is neither available in the destructor, nor in the constructor, we obtain it in between and store it here.

Definition at line 249 of file subscriptor.h.

◆ mutex

std::mutex Subscriptor::mutex

staticprivateinherited

A mutex used to ensure data consistency when printing out the list of subscribers.

Definition at line 271 of file subscriptor.h.

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

include/deal.II/lac/trilinos_parallel_block_vector.h
source/lac/trilinos_block_vector.cc

Public Types

Public Member Functions

Static Public Member Functions

Protected Attributes

Private Types

Private Member Functions

Private Attributes

Static Private Attributes

Related Symbols

Detailed Description

Member Typedef Documentation

◆ BaseClass

◆ BlockType

◆ value_type

◆ pointer

◆ const_pointer

◆ reference

◆ const_reference

◆ size_type

◆ iterator

◆ const_iterator

◆ real_type

◆ map_value_type

◆ map_iterator

Constructor & Destructor Documentation

◆ BlockVector() [1/6]

◆ BlockVector() [2/6]

◆ BlockVector() [3/6]

◆ BlockVector() [4/6]

◆ BlockVector() [5/6]

◆ BlockVector() [6/6]

◆ ~BlockVector()

Member Function Documentation

◆ operator=() [1/4]

◆ operator=() [2/4]

◆ operator=() [3/4]

◆ operator=() [4/4]

◆ reinit() [1/5]

◆ reinit() [2/5]

◆ reinit() [3/5]

◆ reinit() [4/5]

◆ reinit() [5/5]

◆ import_nonlocal_data_for_fe()

◆ has_ghost_elements()

◆ swap()

◆ print()

◆ collect_sizes()

◆ compress()

◆ block() [1/2]

◆ block() [2/2]

◆ get_block_indices()

◆ n_blocks()

◆ size()

◆ locally_owned_size()

◆ locally_owned_elements()

◆ 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*()

◆ norm_sqr()

◆ mean_value()

◆ l1_norm()

◆ l2_norm()

◆ linfty_norm()

◆ add_and_dot()

◆ in_local_range()

◆ all_zero()

◆ is_non_negative()

◆ operator+=()

◆ operator-=()

◆ add() [1/6]

◆ add() [2/6]