[petsc-users] partition of DM Vec entries

[Sang pham van]

Hi Barry,

In 2 processes case, the problem is simple, as I know all ghost cells of
partition 0 are updated from partition 1. However, in the case of many
processes, how do I know from which partitions ghost cells of partition 0
are updated? In other words, How can I know neighboring partitions of the
partition 0? and can I get a list of ghost cells managing by a neighboring
partition?
Please let me know if my question is still not clear.

Many thanks.


On Sat, Oct 15, 2016 at 8:59 AM, Barry Smith <bsmith at mcs.anl.gov> wrote:

>
> > On Oct 14, 2016, at 8:50 PM, Sang pham van <pvsang002 at gmail.com> wrote:
> >
> > Hi,
> >
> > I am using DM Vec for a FV code, for some reasons, I want to know
> partition of all ghost cells of a specific partition. is there a way do
> that?
>
>   Could you please explain in more detail what you want, I don't
> understand? Perhaps give a specific example with 2 processes?
>
>  Barry
>
>
>
> >
> > Many thanks.
> >
> > Best,
> >
>
>
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