ISLocalToGlobalMappingCreateSF#

Creates a mapping between a local (0 to n) ordering and a global parallel ordering.

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 any processor calls this with start = PETSC_DECIDE then all processors 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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