# DMForestGetPartitionOverlap
Get the amount of cell-overlap present in parallel partitions of a forest, with values > 0 indicating subdomains that are expanded by that many iterations of adding adjacent cells 
## Synopsis
```
#include "petscdmforest.h" 
#include "petscdm.h" 
#include "petscdmlabel.h" 
PetscErrorCode DMForestGetPartitionOverlap(DM dm, PetscInt *overlap)
```
Not collective


## Input Parameter

- ***dm -*** the forest



## Output Parameter

- ***overlap -*** default 0





## See Also
 `DMForestGetPartitionOverlap()`, `DMForestSetAdjacencyDimension()`, `DMForestSetAdjacencyCodimension()`

## Level
intermediate

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/dm/impls/forest/forest.c.html#DMForestGetPartitionOverlap">src/dm/impls/forest/forest.c</A>


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[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/dm/impls/forest/forest.c)


[Index of all DMForest routines](index.md)  
[Table of Contents for all manual pages](/docs/manualpages/index.md)  
[Index of all manual pages](/docs/manualpages/singleindex.md)  
