[petsc-dev] [issue1595] Issues of limited number of MPI communicators when having many instances of hypre boomerAMG with Moose

[Kong, Fande]

On Tue, Apr 3, 2018 at 2:12 PM, Rob Falgout hypre Tracker <
hypre-support at llnl.gov> wrote:

>
> Rob Falgout <rfalgout at llnl.gov> added the comment:
>
> Hi Barry,
>
> Can you explain the scenario where multiple hypre solves would be working
> in parallel with the same communicator?  Thanks!
>

Hi Rob,

For instance, if an application has multiple fields and each field will be
solved by a HYPRE solver,  then we end up with  multiple hypre solves. The
multiple hypre solves are not run simultaneously, instead, it will be run
one-by-one. If we assign the same communicator to the multiple hypre
solves, any potential tag conflict?

Fande,



>
> -Rob
>
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