[mvapich-discuss] mvapich2/2.2 optimization for Intel omni-path?

[Hari Subramoni]

Hello Dr. Jung,

Apologies about the delay. Unfortunately, we do not have a dual-rail
Omni-Path based cluster locally. We are in touch with Intel folks regarding
this and will get back to you shortly. In the meantime, could you please
let us know whether it is the intra-node bandwidth or the inter-node
bandwidth you are looking to saturate?

Regards,
Hari.

On Tue, Nov 8, 2016 at 2:03 PM, Jung <chulwoo at quark.phy.bnl.gov> wrote:

> We recently acquired a KNL system with dual Omni-path and are trying to
> find a way to saturate network bandwidth. Usual, although somewhat
> suboptimal, stragegy of using multiple MPI per node doesn't seem to work,
> as the intranode bandwidth is only similar to inter-node bandwith for
> MPI_Isend and receive.
>
> MVAPICH2 2.2 feature list inculdes optimized inter- and intra-node
> communication for KNL. Can someone comment on the performance of Omni-path
> with KNL and/or pointers for optimizing them?
>
> Best,
>
> Chulwoo Jung
> Physics Department
> Brookhaven National Laboratory
> U.S.A.
> chulwoo at bnl.gov
> 1-631-344-5254
> _______________________________________________
> mvapich-discuss mailing list
> mvapich-discuss at cse.ohio-state.edu
> http://mailman.cse.ohio-state.edu/mailman/listinfo/mvapich-discuss
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.cse.ohio-state.edu/pipermail/mvapich-discuss/attachments/20161109/87528060/attachment-0001.html>