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

[Rob Falgout hypre Tracker]

Rob Falgout <rfalgout at llnl.gov> added the comment:

Hi Barry,

It looks like the only time we call MPI_Comm_create is to build a communicator for the coarsest grid solve using Gaussian elimination.  There are probably alternatives that do not require creating a sub-communicator.  Ulrike or someone else more familiar with the code should comment.

I don't see a need to do a Comm_dup() before calling hypre.

Hope this helps.

-Rob

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status: unread -> chatting

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hypre Issue Tracker <hypre-support at llnl.gov>
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