On 12/8/22 14:46, [email protected] wrote:
I know that P4est as a partitioner has limitations compared to other
approaches like Metis or Scotch. However, I was wondering if there was anyway
to penalize the partitioner in order to generate the smaller valence that is
possible? Sometimes we end up with interfaces between processors that are
substantially big (or islands of a few cells). The issue is that for our
particle code, this generates a ton of Ghost particles and these particles
generate additional cost (collisions become significantly more expensive to
calculate because we cannot apply newton's third law for a collision. The
calculation becomes essentially duplicated).
I was wondering if there was any ways to "force" or ensure that the interfaces
between subdomains remained relatively well-posed?
Bruno:
No, p4est partitions a space-filling curve. You can select where the partition
points along this one-dimensional line are (by choosing weights for each
cell), but you can't change the curve or what subdomain interfaces this creates.
If that's what you need, you'll have to use the fullydistributed triangulation
class that allows you to do that.
Best
W.
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Wolfgang Bangerth email: [email protected]
www: http://www.math.colostate.edu/~bangerth/
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