PETSc version 3.15.5
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# PetscSFSetUpRanks

Set up data structures associated with ranks; this is for internal use by PetscSF implementations.

### Synopsis

    #include "petscsf.h"
    PetscErrorCode PetscSFSetUpRanks(PetscSF sf,MPI_Group dgroup)

Collective

### Input Arguments

| sf | - PetscSF to set up; PetscSFSetGraph() must have been called
| dgroup | - MPI_Group of ranks to be distinguished (e.g., for self or shared memory exchange)

### See Also

PetscSFGetRootRanks()

### Level

developer

### Location

src/vec/is/sf/interface/sf.c
Index of all PetscSF routines
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Index of all manual pages