[petsc-users] Scatter context for MatMult

[John Fettig]

Is this the role of MatGetGhosts?

John

On Fri, Aug 17, 2012 at 2:01 PM, John Fettig <john.fettig at gmail.com> wrote:
> Is there a scatter context available someplace that would allow me to
> gather all of the elements of a vector that correspond to the ones
> needed for a MatMult (MPIAIJ matrices)?  When you do a MatMult, I
> presume it first scatters/gathers the ghost elements of the vector
> being multiplied, can I use this scatter for a vectors outside of the
> MatMult?
>
> Thanks,
> John