On Tue, Oct 29, 2013 at 3:17 PM, Kirk, Benjamin (JSC-EG311) <
benjamin.k...@nasa.gov> wrote:
> If forced to choose one of those options for a cube, though, I'd suggest
> the SFC option.
>
> -Ben
>
>
Thanks Ben! I wasn't even aware of that Partitioner. I just tried it on
my very large 3D cube domain simulation and it's giving me a 5% boost in
performance over linear with no other changes. I'm running on 120
processors across 60 nodes + threading (using tons of memory). I guess the
communication pattern really makes that much difference. Also, that's a
low estimate, I have an expensive postprocessor that runs at the end of the
timestep that's being added into the timestep timer so the actual solve
performance boost might be closer to 10%!
Cody
>
> On Oct 29, 2013, at 2:58 PM, "John Peterson" <jwpeter...@gmail.com> wrote:
>
>
>
>
> On Tue, Oct 29, 2013 at 1:38 PM, ernestol <ernes...@lncc.br> wrote:
>
>> Thanks for the answers.
>>
>> So wich of the three partitioner do you recommend and how can I change it?
>>
>
> I wouldn't say any of them are actually "recommended" for production
> code, but you can certainly try them by first including the relevant
> headers:
>
> #include "libmesh/linear_partitioner.h"
> #include "libmesh/centroid_partitioner.h"
> #include "libmesh/sfc_partitioner.h"
>
> and then picking one of them _before_ calling build_cube:
>
> Mesh mesh;
>
> // Choose a non-default partitioner
> // mesh.partitioner().reset(new LinearPartitioner);
> // mesh.partitioner().reset(new CentroidPartitioner);
> mesh.partitioner().reset(new SFCPartitioner);
>
> --
> John
>
>
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