# PetscProcessPlacementView
display the MPI rank placement by core 
## Synopsis
```
#include "petscsys.h"   
PetscErrorCode PetscProcessPlacementView(PetscViewer viewer)
```

## Input Parameter

- ***viewer -*** ASCII viewer to display the results on





## Note
Requires that PETSc be installed with hwloc, for example using --download-hwloc

## Level
intermediate

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/sys/utils/memc.c.html#PetscProcessPlacementView">src/sys/utils/memc.c</A>


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[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/sys/utils/memc.c)


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