On Wed, Nov 23, 2011 at 05:43, Dominik Szczerba <dominik at itis.ethz.ch>wrote:
> In my procedure considerable time is spent to partition the domain. > When using MUMPS as a solver for my matrix I see the message: > > "Ordering based on METIS" > This is an ordering to reduce fill in factorization, not to to partition the domain. Last I heard, symbolic factorization was done in serial, which explains why you find it taking a lot of time. The right hand side and solution vectors are also passed on rank 0, which presents another inefficiency/imbalance and memory bottleneck. Talk to the MUMPS developers or use a different package if you don't like these properties. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20111123/40e31ad9/attachment.htm>
