:orphan:
# PetscSFSetUp
set up communication structures for a `PetscSF`, after this is done it may be used to perform communication
## Synopsis
```
#include "petscsf.h"
PetscErrorCode PetscSFSetUp(PetscSF sf)
```
Collective
## Input Parameter
- ***sf -*** star forest communication object
## See Also
`PetscSF`, `PetscSFType`, `PetscSFSetFromOptions()`, `PetscSFSetType()`
## Level
beginner
## Location
src/vec/is/sf/interface/sf.c
## Examples
src/vec/is/sf/tutorials/ex1.c
src/vec/is/sf/tutorials/ex1f.F90
src/vec/is/sf/tutorials/ex2.c
src/vec/is/sf/tutorials/ex3.c
## Implementations
PetscSFSetUp_Allgather in src/vec/is/sf/impls/basic/allgather/sfallgather.c
PetscSFSetUp_Allgatherv in src/vec/is/sf/impls/basic/allgatherv/sfallgatherv.c
PetscSFSetUp_Neighbor in src/vec/is/sf/impls/basic/neighbor/sfneighbor.c
PetscSFSetUp_Basic in src/vec/is/sf/impls/basic/sfbasic.c
PetscSFSetUp_Window in src/vec/is/sf/impls/window/sfwindow.c
---
[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/vec/is/sf/interface/sf.c)
[Index of all PetscSF routines](index.md)
[Table of Contents for all manual pages](/manualpages/index.md)
[Index of all manual pages](/manualpages/singleindex.md)