Hi Karli,
On 12/12/2013 02:50 PM, Karl Rupp wrote:
Hmm, this does not sound like something I would consider a good fit
for GPUs. With 16 MPI processes you have additional congestion of the
one or two GPUs per node, so you would have the rethink the solution
procedure as a whole.
Are you sure about that for Titan? Supposedly the K20X's can deal with
multiple MPI processes hitting a single GPU pretty well using Hyper-Q.
Paul has seen pretty good speed up with small GPU kernels simply by
over-subscribing each GPU with 4 MPI processes.
See here:
http://blogs.nvidia.com/blog/2012/08/23/unleash-legacy-mpi-codes-with-keplers-hyper-q/
Cheers,
Dominic
--
Dominic Meiser
Tech-X Corporation
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