Dune::NonoverlappingBlockPreconditioner< C, P > Class Template Reference

Nonoverlapping parallel preconditioner. More...

#include <dune/istl/novlpschwarz.hh>

Inheritance diagram for Dune::NonoverlappingBlockPreconditioner< C, P >:

Public Types
typedef P::domain_type	domain_type
	The domain type of the preconditioner.
typedef P::range_type	range_type
	The range type of the preconditioner.
typedef C	communication_type
	The type of the communication object.
typedef X::field_type	field_type
	The field type of the preconditioner.

Public Member Functions
	NonoverlappingBlockPreconditioner (P &p, const communication_type &c)
	Constructor.
	NonoverlappingBlockPreconditioner (const std::shared_ptr< P > &p, const communication_type &c)
	Constructor.
virtual void	pre (domain_type &x, range_type &b)
	Prepare the preconditioner.
virtual void	apply (domain_type &v, const range_type &d)
	Apply the preconditioner.
template<bool forward>
void	apply (X &v, const Y &d)
	Apply one step of the preconditioner to the system A(v)=d.
virtual void	post (domain_type &x)
	Clean up.
virtual SolverCategory::Category	category () const
	Category of the preconditioner (see SolverCategory::Category)

Detailed Description

template<class C, class P>
class Dune::NonoverlappingBlockPreconditioner< C, P >

Nonoverlapping parallel preconditioner.

This is essentially a wrapper that take a sequential preconditoner. In each step the sequential preconditioner is applied and then all owner data points are updated on all other processes.

Member Typedef Documentation

communication_type

template<class C , class P >

typedef C Dune::NonoverlappingBlockPreconditioner< C, P >::communication_type

The type of the communication object.

domain_type

template<class C , class P >

typedef P::domain_type Dune::NonoverlappingBlockPreconditioner< C, P >::domain_type

The domain type of the preconditioner.

field_type

typedef X::field_type Dune::Preconditioner< P::domain_type , P::range_type >::field_type

inherited

The field type of the preconditioner.

range_type

template<class C , class P >

typedef P::range_type Dune::NonoverlappingBlockPreconditioner< C, P >::range_type

The range type of the preconditioner.

Constructor & Destructor Documentation

NonoverlappingBlockPreconditioner() [1/2]

template<class C , class P >

Dune::NonoverlappingBlockPreconditioner< C, P >::NonoverlappingBlockPreconditioner ( P &  p, const communication_type &  c  )

inline

Constructor.

constructor gets all parameters to operate the prec.

Parameters

prec	The sequential preconditioner.
c	The communication object for syncing owner and copy data points. (E.~g. OwnerOverlapCommunication )

Constructor.

constructor gets all parameters to operate the prec.

Parameters

p	The sequential preconditioner.
c	The communication object for syncing overlap and copy data points. (E.~g. OwnerOverlapCopyCommunication )

NonoverlappingBlockPreconditioner() [2/2]

template<class C , class P >

Dune::NonoverlappingBlockPreconditioner< C, P >::NonoverlappingBlockPreconditioner ( const std::shared_ptr< P > &  p, const communication_type &  c  )

inline

Constructor.

constructor gets all parameters to operate the prec.

Parameters

p	The sequential preconditioner.
c	The communication object for syncing overlap and copy data points. (E.~g. OwnerOverlapCopyCommunication )

Member Function Documentation

apply() [1/2]

template<class C , class P >

virtual void Dune::NonoverlappingBlockPreconditioner< C, P >::apply ( domain_type &  v, const range_type &  d  )

inlinevirtual

Apply the preconditioner.

Implements Dune::Preconditioner< P::domain_type, P::range_type >.

apply() [2/2]

template<class C , class P >

template<bool forward>

void Dune::NonoverlappingBlockPreconditioner< C, P >::apply ( X &  v, const Y &  d  )

inlinevirtual

Apply one step of the preconditioner to the system A(v)=d.

On entry v=0 and d=b-A(x) (although this might not be computed in that way. On exit v contains the update, i.e one step computes \( v = M^{-1} d \) where \( M \) is the approximate inverse of the operator \( A \) characterizing the preconditioner.

Parameters

[out]	v	The update to be computed
	d	The current defect.

Implements Dune::Preconditioner< P::domain_type, P::range_type >.

category()

template<class C , class P >

virtual SolverCategory::Category Dune::NonoverlappingBlockPreconditioner< C, P >::category ( ) const

inlinevirtual

Category of the preconditioner (see SolverCategory::Category)

Implements Dune::Preconditioner< P::domain_type, P::range_type >.

post()

template<class C , class P >

virtual void Dune::NonoverlappingBlockPreconditioner< C, P >::post ( domain_type &  x )

inlinevirtual

Clean up.

Implements Dune::Preconditioner< P::domain_type, P::range_type >.

pre()

template<class C , class P >

virtual void Dune::NonoverlappingBlockPreconditioner< C, P >::pre ( domain_type &  x, range_type &  b  )

inlinevirtual

Prepare the preconditioner.

Implements Dune::Preconditioner< P::domain_type, P::range_type >.

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

• novlpschwarz.hh