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# PCGAMGSetUseParallelCoarseGridSolve
allow a parallel coarse grid solver
## Synopsis
```
#include "petscpc.h"
#include "petscksp.h"
PetscErrorCode PCGAMGSetUseParallelCoarseGridSolve(PC pc, PetscBool flg)
```
Collective
## Input Parameters
- ***pc -*** the preconditioner context
- ***flg -*** `PETSC_TRUE` to not force coarse grid onto one processor
## Options Database Key
- ***-pc_gamg_use_parallel_coarse_grid_solver -*** use a parallel coarse grid direct solver
## See Also
`PCGAMG`, `PCGAMGSetCoarseGridLayoutType()`, `PCGAMGSetCpuPinCoarseGrids()`
## Level
intermediate
## Location
src/ksp/pc/impls/gamg/gamg.c
## Implementations
PCGAMGSetUseParallelCoarseGridSolve_GAMG in src/ksp/pc/impls/gamg/gamg.c
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[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/ksp/pc/impls/gamg/gamg.c)
[Index of all PC routines](index.md)
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