[petsc-users] A bad commit affects MOOSE

[Jed Brown]

Derek Gaston <friedmud at gmail.com> writes:

> On Tue, Apr 3, 2018 at 4:06 PM Jed Brown <jed at jedbrown.org> wrote:
>
>> Communicators should be cheap.  One per library per "size" isn't a huge
>> number of communicators.
>>
>
> I agree - but that's not what we're getting here.  We're getting one per
> "object" (Mat / Preconditioner, etc.) associated with the library per
> "size".  If we can fix that I agree that there's no problem (we use a lot
> of libraries... but not 2000 separate ones simultaneously!).

So PETSc needs to dup and attach a hypre communicator because they
aren't interested in doing it themselves.  Not hard to implement, just
mildly annoying.