:orphan:
# PetscSFSetRankOrder
sort multi-points for gathers and scatters by rank order 
## Synopsis
```
#include "petscsf.h" 
PetscErrorCode PetscSFSetRankOrder(PetscSF sf, PetscBool flg)
```
Logically Collective


## Input Parameters

- ***sf -*** star forest
- ***flg -*** `PETSC_TRUE` to sort, `PETSC_FALSE` to skip sorting (lower setup cost, but non-deterministic)





## See Also
 `PetscSF`, `PetscSFType`, `PetscSFGatherBegin()`, `PetscSFScatterBegin()`

## Level
advanced

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/vec/is/sf/interface/sf.c.html#PetscSFSetRankOrder">src/vec/is/sf/interface/sf.c</A>


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[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)