[Beowulf] AMD Epyc + Omni-Path?

[Bill Broadley]

Anyone else running AMD Epyc (or any other non Intel CPU) and Omni-Path?

I've have some AMD Epyc 7451 nodes working, but I went to buy more only to hear
that it's not a configuration that the vendor or Intel will support.

I've never needed support from Mellanox or Pathscale/Qlogic/Intel for previous
generation infiniband cards/switches. Generally we compile our own ofed,
libpsm, libpsm2, openmpi, mvapich, mpich, and any other related pieces we need.

There is of course the risk that some AMD specific issue hits a larger Omni-Path
configuration (we are considering 40 nodes or so).

Any thoughts appreciated.
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[Peter Kjellström]

On Wed, 21 Mar 2018 18:10:13 -0700

Post by Bill Broadley
Anyone else running AMD Epyc (or any other non Intel CPU) and
Omni-Path?
I've have some AMD Epyc 7451 nodes working, but I went to buy more
only to hear that it's not a configuration that the vendor or Intel
will support.

Intel has a very narrow "supported" definition for OPA: Haswell-E5,
Broadwell-E5, Skylake Xeon Scalable.

I personally don't think there's anything technical behind this, just
marketing/product-positioning.

We run OPA on some old (Nehalem) nodes as a test platform for our
system environment (without problems).

/Peter K

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