[petsc-users] Fwd: MatZeroRowsColumns for mpibaij

[Rhodri Davies]

Dear all,

Would you mind giving us an update on your thoughts re: this question? We're very keen to be able to use such functionally and it would be good to know if you're looking into this / have any suggestions?

Best wishes,

Rhodri

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Research Fellow
Research School of Earth Sciences
The Australian National University
Canberra, ACT, 0200, Australia

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E: rhodri.davies at anu.edu.au<mailto:rhodri.davies at anu.edu.au>
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Begin forwarded message:

From: Stephan Kramer <s.kramer at imperial.ac.uk<mailto:s.kramer at imperial.ac.uk>>
Subject: Fwd: [petsc-users] MatZeroRowsColumns for mpibaij
Date: 31 October 2013 13:16:05 GMT+11:00
To: Rhodri Davies <rhodri.davies at anu.edu.au<mailto:rhodri.davies at anu.edu.au>>




-------- Original Message --------
Subject: [petsc-users] MatZeroRowsColumns for mpibaij
Date: Wed, 19 Jun 2013 13:22:31 +0100
From: Stephan Kramer <s.kramer at imperial.ac.uk<mailto:s.kramer at imperial.ac.uk>>
To: PETSc users list <petsc-users at mcs.anl.gov<mailto:petsc-users at mcs.anl.gov>>

Dear all,

We have found the MatZeroRowsColumns() routine to be very useful for lifting boundary conditions. Unfortunately we also found that it isn't implemented for matrix type mpibaij and we're quite keen on
keeping the baij structure as it seems to give us significant savings for DG problems (in particular the blocked sor). I had a quick look at the implementation of MatZeroRowsColums_MPIAIJ but couldn't
really estimate how hard it would be to do something similar for mpibaij (an implementation for seqbaij exists already). Is this something that's likely to be looked at in the future?

Stephan






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