[petsc-dev] Should -pc_type mg be a linear preconditioner by default?

[Dmitry Karpeev]

The coloring of a triangular matrix should also help with the threading of
smoothers.

On Tue, Oct 25, 2011 at 8:54 PM, Jed Brown <jedbrown at mcs.anl.gov> wrote:

> On Tue, Oct 25, 2011 at 20:50, Barry Smith <bsmith at mcs.anl.gov> wrote:
>
>> The coloring the INL guy need is for efficient computation of Jacobians;
>> it is a different coloring than needed for smoothers. Of course we should
>> have both in PETSc, but have neither in parallel.
>
>
>  Isn't this just the distinction between coloring a symmetric matrix and
> coloring a triangular matrix? (Maybe there are more consequences to the
> algorithm.)
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.mcs.anl.gov/pipermail/petsc-dev/attachments/20111025/61c40550/attachment.html>