[Beowulf] Xeon D systems? (and 10G in general)
Michael Di Domenico
mdidomenico4 at gmail.com
Wed Mar 11 05:37:06 PDT 2015
Seems like an interesting chip. 256GF in 45 watts seems nice, but i'm
a little leery on the 10G onboard. I'm not sure 10G is cost effective
on the large scale yet. Is it even port-for-port to infiniband yet?
I've not looked in a while.
On Wed, Mar 11, 2015 at 5:52 AM, John Hearns <hearnsj at googlemail.com> wrote:
> 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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