[aspect-devel] Aspect Parallel Initialization

Eric Heien emheien at ucdavis.edu
Wed Nov 28 11:57:10 PST 2012

In my experience, writing the mesh file seems to be the part that slows down checkpointing.


On Nov 28, 2012, at 11:37 AM, Timo Heister wrote:

>> On 11/28/2012 10:52 AM, Eric Heien wrote:
>>> OK, I added the note.  Also, I realized this may be the cause of slow
>>> checkpointing as well.  I don't have time to investigate now, but if
>>> someone experiences slow checkpointing (like I did before) this may
>>> help them.
>> Maybe, but in the case of checkpointing every processor really does have
>> to write something. In the case of the parameter file this was just a bug...
> Correct. The .info file is only written by processor 0. The big mesh
> file is written by p4est, but all processors are writing (using
> posix). If I find the time, I will update the interface from deal.II
> to p4est to a better API for writing this file (then using MPI I/O).
> -- 
> Timo Heister
> http://www.math.tamu.edu/~heister/

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