[petsc-users] da_overlap vs width in dmdacreate

Barry Smith bsmith at mcs.anl.gov
Fri Jun 24 16:23:58 CDT 2016

   What arguments are you referring to?

PetscErrorCode  DMDACreate2d(MPI_Comm comm,DMBoundaryType bx,DMBoundaryType by,DMDAStencilType stencil_type,
                          PetscInt M,PetscInt N,PetscInt m,PetscInt n,PetscInt dof,PetscInt s,const PetscInt lx[],const PetscInt ly[],DM *da)

the argument s is the stencil width and depends on the finite difference stencil you want to use. There is no da_overlap argument.


> On Jun 24, 2016, at 4:17 PM, Xiangdong <epscodes at gmail.com> wrote:
> Hello everyone,
> I have a quick question. What is the relationship between da_overlap and the width parameter in dmdacreate2d?
> From the examples, it seems that width=1 works with da_overlap=4. Could you please explain the relationship or point me to a reference page?
> Thanks.
> Xiangdong

More information about the petsc-users mailing list