ISLocalToGlobalMappingCreateSF

Creates a mapping between a local (0 to n) ordering and a global parallel ordering induced by a star forest.

Synopsis

#include "petscis.h"  
PetscErrorCode ISLocalToGlobalMappingCreateSF(PetscSF sf, PetscInt start, ISLocalToGlobalMapping *mapping)

Collective

Input Parameters

• sf - star forest mapping contiguous local indices to (rank, offset)

• start - first global index on this process, or PETSC_DECIDE to compute contiguous global numbering automatically

Output Parameter

• mapping - new mapping data structure

Note

If a process calls this function with start = PETSC_DECIDE then all processes must, otherwise the program will hang.

See Also

Low-level Vector Communication, PetscSF, ISLocalToGlobalMappingDestroy(), ISLocalToGlobalMappingCreate(), ISLocalToGlobalMappingCreateIS(), ISLocalToGlobalMappingSetFromOptions()

Level

advanced

Location

src/vec/is/utils/isltog.c

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Index of all IS routines
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Index of all manual pages