[petsc-dev] DMGetOutputDM hangs on multiple procs

[Matthew Knepley]

On Thu, Jun 23, 2016 at 5:46 AM, Sander Arens <Sander.Arens at ugent.be> wrote:

> I noticed that DMGetOutputDM hangs when using multiple procs. The culprit
> is
> https://bitbucket.org/petsc/petsc/commits/c26acbdef0eedda92db6423afb8b38a1502ca0c8.
>
> This doesn't work when one or more procs don't have any constraints while
> others have, because the ones with constraints call DMClone (collective)
> while the other procs don't.
>

Yep, will have to make the constraint logic global. I can do this at the
PETSc Meeting
next week in Vienna.

  Thanks,

    Matt


> Thanks,
> Sander
>



-- 
What most experimenters take for granted before they begin their
experiments is infinitely more interesting than any results to which their
experiments lead.
-- Norbert Wiener
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