Functor class generating a numbering optimized for PETSc. More...

#include <SF_numbering.h>

Inheritance diagram for SF::petsc_numbering< T, S >:

Collaboration diagram for SF::petsc_numbering< T, S >:

Public Member Functions
	petsc_numbering (overlapping_layout< T > &pl, bool use_rcm=false)

void	operator() (meshdata< T, S > &mesh)
	Generate a numbering as necessary for good PETSc parallel performance. More...

Detailed Description

template<class T, class S>
class SF::petsc_numbering< T, S >

Functor class generating a numbering optimized for PETSc.

Template Parameters

T	Integer type.
S	Floating point type.

Definition at line 237 of file SF_numbering.h.

Constructor & Destructor Documentation

◆ petsc_numbering()

template<class T , class S >

SF::petsc_numbering< T, S >::petsc_numbering	(	overlapping_layout< T > &	pl,
		bool	use_rcm = `false`
	)

inline

Parameters

pl	Overlapping parallel layout. Reordered in place when use_rcm is set.
use_rcm	If true, apply the reversed breadth-first renumbering; otherwise ascending.

Definition at line 247 of file SF_numbering.h.

Member Function Documentation

◆ operator()()

template<class T , class S >

void SF::petsc_numbering< T, S >::operator() ( meshdata< T, S > & mesh )

inlinevirtual

Generate a numbering as necessary for good PETSc parallel performance.

PETSc implicitly the following parallel layout of unknowns:

Rank	unknowns intervals
0	[0,1,...,N0-1]
1	[N0,N0+1,...,N1-1]
...	...

For good parallel performance, the node indices used in the domain decomposition should match as closely as possible to the described layout. This makes a renumbering necessary.

Parameters

[in,out] mesh The mesh.

Postcondition: A PETSc numbering has been added to the mesh.

Implements SF::numbering< T, S >.

Definition at line 270 of file SF_numbering.h.

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

fem/slimfem/src/SF_numbering.h