[Beowulf] Xeon D systems? (and 10G in general)

John Hearns hearnsj at googlemail.com
Wed Mar 11 02:52:35 PDT 2015

Very good article on The Platform:


On 10 March 2015 at 19:42, Mark Hahn <hahn at mcmaster.ca> wrote:

> Intel recently introduced an interesting product:
> Xeon D is a Broadwell (Haswell shrink) SoC.
> It only has 8 cores, not high-clocked and only 2 dimm channels, so it's
> definitely not at the same level of fat-node goodness as an e5-26xx v3.
> But for 45W, you also get 2x onboard 10Gb!
> Anyone working on an HPC system based on these quite compact building
> blocks?  the SoC also has stuff like PCIe and SATA,
> which is why a lot of the coverage is calling it a chip for desktop NAS,
> etc.  But for HPC purposes, the CPU is quite decent, memory balance is
> reasonable, and it's hard
> to argue with two free 10G...
> On that topic, I've read some work recently on performance tuning of Intel
> 10G, but not in an HPC context.  Is 10G still
> sucking for MPI latency?  (SFP+ DA noticably better than 10GbT?)
> If you're thinking of saying "why bother with an x86_64 SoC
> when you can get a 64b Atom SoC", well, can you?  (for cheap,
> at commodity volume, etc...)  Do any of the surviving Atom SoCs
> still have onboard multiport switching fabrics?
> thanks, Mark Hahn.
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