ISLocalToGlobalMappingGetNodeInfo#

Gets the neighbor information for each MPI rank

Synopsis#

#include "petscis.h"  
PetscErrorCode ISLocalToGlobalMappingGetNodeInfo(ISLocalToGlobalMapping mapping, PetscInt *nnodes, PetscInt *count[], PetscInt **indices[])

Collective

Input Parameter#

  • mapping - the mapping from local to global indexing

Output Parameters#

  • nnodes - number of local nodes (same ISLocalToGlobalMappingGetSize())

  • count - number of neighboring processors per node

  • indices - indices of processes sharing the node (sorted)

Note#

The user needs to call ISLocalToGlobalMappingRestoreInfo() when the data is no longer needed.

See Also#

Low-level Vector Communication, ISLocalToGlobalMappingDestroy(), ISLocalToGlobalMappingCreateIS(), ISLocalToGlobalMappingCreate(), ISLocalToGlobalMappingGetInfo(), ISLocalToGlobalMappingRestoreNodeInfo()

Level#

advanced

Location#

src/vec/is/utils/isltog.c


Index of all IS routines
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Index of all manual pages