[Beowulf] Haswell as supercomputer microprocessors
samuel at unimelb.edu.au
Mon Aug 3 06:12:09 PDT 2015
On Mon, 3 Aug 2015 12:06:27 PM Mikhail Kuzminsky wrote:
> Current Intel Haswell E5 v3 may also have 18 = 2**4 +2 cores. Is there some
> sense to try POWER BQC or SPARC64 XIfx ideas (not exactly), and use only 16
> Haswell cores for parallel computations ? If the answer is "yes", then how
> to use this way under Linux ?
Doing this with Linux predates BGQ for instance - the whole cpuset idea came
from SGI and was used on their Itanic Altix systems to provide a boot CPU set
that would have all system processes confined into and then the rest of the
cores were available for jobs.
When we used to use Torque I agitated for cpuset support, and for it to be
done in a way that would allow this.
We use Slurm now, but I've never looked at how easy to make it work in the
boot cpuset type mode - it's probably just a matter of telling it there are
N-1 cores per node and ensuring that it doesn't try and claim the same core
you're using as the boot cpuset. :-)
Best of luck!
Christopher Samuel Senior Systems Administrator
VLSCI - Victorian Life Sciences Computation Initiative
Email: samuel at unimelb.edu.au Phone: +61 (0)3 903 55545
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