SparseDirectMUMPS Class Reference

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

Detailed Description

This class provides an interface to the parallel sparse direct solver MUMPS. MUMPS is direct method based on a multifrontal approach, which performs a direct LU factorization. The matrix coming in may have either symmetric or nonsymmetric sparsity pattern.

Note

This class is useable if and only if a working installation of MUMPS exists on your system and was detected during configuration of deal.II.

Instantiations

There are instantiations of this class for SparseMatrix<double>, SparseMatrix<float>, BlockSparseMatrix<double>, and BlockSparseMatrix<float>. This class supports several vector types for use with vmult() and Tvmult(), including Vector<double>, BlockVector<double>, TrilinosWrappers::MPI::Vector, PETScWrappers::MPI::Vector, and LinearAlgebra::distributed::Vector<double>.

Definition at line 479 of file sparse_direct.h.

Inheritance diagram for SparseDirectMUMPS:

Classes
struct	AdditionalData

Public Types
using	size_type = types::global_dof_index

Public Member Functions
	SparseDirectMUMPS (const AdditionalData &additional_data=AdditionalData(), const MPI_Comm &communicator=MPI_COMM_WORLD)
	~SparseDirectMUMPS ()
template<class Matrix >
void	initialize (const Matrix &matrix)
template<typename VectorType >
void	vmult (VectorType &dst, const VectorType &src) const
template<typename VectorType >
void	Tvmult (VectorType &, const VectorType &src) const
int *	get_icntl ()
template<class Archive >
void	serialize (Archive &ar, const unsigned int version)
Querying the observer pointers an object has.
unsigned int	n_subscriptions () const
template<typename StreamType >
void	list_subscribers (StreamType &stream) const
void	list_subscribers () const

Static Public Member Functions
static ::ExceptionBase &	ExcInitializeAlreadyCalled ()
static ::ExceptionBase &	ExcInUse (int arg1, std::string arg2, std::string arg3)
static ::ExceptionBase &	ExcNoSubscriber (std::string arg1, std::string arg2)

Private Member Functions
template<class Matrix >
void	initialize_matrix (const Matrix &matrix)
void	copy_solution (Vector< double > &vector) const
void	copy_rhs_to_mumps (const Vector< double > &rhs) const
EnableObserverPointer functionality
Classes derived from EnableObserverPointer provide a facility to subscribe to this object. This is mostly used by the ObserverPointer 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
void	check_no_subscribers () const noexcept

Private Attributes
DMUMPS_STRUC_C	id
std::unique_ptr< double[]>	a
std::vector< double >	rhs
std::vector< types::mumps_index >	irhs_loc
std::unique_ptr< types::mumps_index[]>	irn
std::unique_ptr< types::mumps_index[]>	jcn
types::global_dof_index	n
types::mumps_nnz	nnz
IndexSet	locally_owned_rows
AdditionalData	additional_data
const MPI_Comm	mpi_communicator
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

Member Typedef Documentation

size_type

using SparseDirectMUMPS::size_type = types::global_dof_index

Declare type for container size.

Definition at line 485 of file sparse_direct.h.

Constructor & Destructor Documentation

SparseDirectMUMPS()

SparseDirectMUMPS::SparseDirectMUMPS	(	const AdditionalData &	additional_data = AdditionalData(),
		const MPI_Comm &	communicator = MPI_COMM_WORLD
	)

Constructor, takes an MPI_Comm which defaults to MPI_COMM_WORLD and an AdditionalData to control MUMPS execution.

Definition at line 872 of file sparse_direct.cc.

~SparseDirectMUMPS()

SparseDirectMUMPS::~SparseDirectMUMPS

(

)

Destructor

Definition at line 924 of file sparse_direct.cc.

Member Function Documentation

initialize()

template<class Matrix >

void SparseDirectMUMPS::initialize

(

const Matrix &

matrix

)

This function computes the LU factorization of the system's matrix matrix with the options given in the constructor's AdditionalData.

Definition at line 1388 of file sparse_direct.cc.

vmult()

template<typename VectorType >

void SparseDirectMUMPS::vmult	(	VectorType &	dst,
		const VectorType &	src
	)		const

Apply the inverse of the matrix to the input vector src and store the solution in the output vector dst.

Definition at line 1402 of file sparse_direct.cc.

Tvmult()

template<typename VectorType >

void SparseDirectMUMPS::Tvmult	(	VectorType &	dst,
		const VectorType &	src
	)		const

Apply the inverse of the transposed matrix to the input vector src and store the solution in the output vector dst.

Definition at line 1527 of file sparse_direct.cc.

get_icntl()

int * SparseDirectMUMPS::get_icntl

(

)

Return the ICNTL integer array from MUMPS.

The ICNTL array contains integer control parameters for the MUMPS solver. Keep in mind that MUMPS is a fortran library and the documentation refers to indices into this array starting from one rather than from zero. To select the correct index one can use a macro like this:

#define ICNTL(I) icntl[(I)-1]

The MUMPS documentation describes each parameter of the array. Be aware that ownership of the array remains in the current class rather than with the caller of this function.

Definition at line 1542 of file sparse_direct.cc.

initialize_matrix()

template<class Matrix >

void SparseDirectMUMPS::initialize_matrix ( const Matrix &  matrix )

private

This function initializes a MUMPS instance and hands over the system's matrix matrix.

Definition at line 935 of file sparse_direct.cc.

copy_solution()

void SparseDirectMUMPS::copy_solution ( Vector< double > &  vector ) const

private

Copy the computed solution into the solution vector.

Definition at line 1367 of file sparse_direct.cc.

copy_rhs_to_mumps()

void SparseDirectMUMPS::copy_rhs_to_mumps ( const Vector< double > &  rhs ) const

private

Copy the right-hand side vector into the MUMPS instance.

Definition at line 1349 of file sparse_direct.cc.

n_subscriptions()

unsigned int EnableObserverPointer::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 318 of file enable_observer_pointer.h.

list_subscribers() [1/2]

template<typename StreamType >

void EnableObserverPointer::list_subscribers ( StreamType &  stream ) const

inlineinherited

List the subscribers to the input stream.

Definition at line 335 of file enable_observer_pointer.h.

list_subscribers() [2/2]

void EnableObserverPointer::list_subscribers ( ) const

inherited

List the subscribers to deallog.

Definition at line 200 of file enable_observer_pointer.cc.

serialize()

template<class Archive >

void EnableObserverPointer::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 327 of file enable_observer_pointer.h.

subscribe()

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

privateinherited

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 enable_observer_pointer.cc.

unsubscribe()

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

privateinherited

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 154 of file enable_observer_pointer.cc.

check_no_subscribers()

void EnableObserverPointer::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 58 of file enable_observer_pointer.cc.

Member Data Documentation

id

DMUMPS_STRUC_C SparseDirectMUMPS::id

mutableprivate

Definition at line 636 of file sparse_direct.h.

a

std::unique_ptr<double[]> SparseDirectMUMPS::a

private

The actual values of the matrix.

a[k] is the value of the matrix entry (i,j) if irn[k] == i and jcn[k] == j.

Definition at line 645 of file sparse_direct.h.

rhs

std::vector<double> SparseDirectMUMPS::rhs

mutableprivate

The right-hand side vector.

Definition at line 650 of file sparse_direct.h.

irhs_loc

std::vector<types::mumps_index> SparseDirectMUMPS::irhs_loc

mutableprivate

Local to global index mapping for the right-hand side vector.

Definition at line 655 of file sparse_direct.h.

irn

std::unique_ptr<types::mumps_index[]> SparseDirectMUMPS::irn

private

irn contains the row indices of the non-zero entries of the matrix.

Definition at line 660 of file sparse_direct.h.

jcn

std::unique_ptr<types::mumps_index[]> SparseDirectMUMPS::jcn

private

jcn contains the column indices of the non-zero entries of the matrix.

Definition at line 665 of file sparse_direct.h.

n

types::global_dof_index SparseDirectMUMPS::n

private

The number of rows of the matrix. The matrix is square.

Definition at line 670 of file sparse_direct.h.

nnz

types::mumps_nnz SparseDirectMUMPS::nnz

private

Number of non-zero entries in the matrix.

Definition at line 675 of file sparse_direct.h.

locally_owned_rows

IndexSet SparseDirectMUMPS::locally_owned_rows

private

IndexSet storing the locally owned rows of the matrix.

Definition at line 680 of file sparse_direct.h.

additional_data

AdditionalData SparseDirectMUMPS::additional_data

private

Struct that holds the additional data for the MUMPS solver.

Definition at line 705 of file sparse_direct.h.

mpi_communicator

const MPI_Comm SparseDirectMUMPS::mpi_communicator

private

MPI_Comm object for the MUMPS solver.

Definition at line 710 of file sparse_direct.h.

counter

std::atomic<unsigned int> EnableObserverPointer::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 212 of file enable_observer_pointer.h.

counter_map

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

mutableprivateinherited

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

Definition at line 218 of file enable_observer_pointer.h.

validity_pointers

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

mutableprivateinherited

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

Definition at line 224 of file enable_observer_pointer.h.

object_info

const std::type_info* EnableObserverPointer::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 232 of file enable_observer_pointer.h.

mutex

std::mutex EnableObserverPointer::mutex

staticprivateinherited

A mutex used to ensure data consistency when accessing the mutable members of this class. This lock is used in the subscribe() and unsubscribe() functions, as well as in list_subscribers().

Definition at line 239 of file enable_observer_pointer.h.

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

• include/deal.II/lac/sparse_direct.h
• source/lac/sparse_direct.cc