[aspect-devel] Aspect Parallel Initialization

Wolfgang Bangerth bangerth at math.tamu.edu
Wed Nov 28 05:08:24 PST 2012

On 11/28/2012 01:36 AM, Eric Heien wrote:
> It seems the slowdown had a rather unexpected cause.  Since all cores
> write the parameter file simultaneously, the filesystem has locking
> issues that slow down all nodes.  This would also explain the linear
> relationship with the number of cores.  To fix this I changed the
> code to only write the parameter file on the root node which seems to
> solve the problem.

That would explain it. Thanks for fixing this!

Would you mind putting a note in doc/modules/changes.h as well?


Wolfgang Bangerth               email:            bangerth at math.tamu.edu
                                 www: http://www.math.tamu.edu/~bangerth/

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