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On 28/03/14 21:04, Biddiscombe, John A. wrote:
> Just as a follow up to this thread. I spoke with someone from IBM
> and they tell me that 2 cores of 4 hardware threads each are hidden
> from the kernel (how do they do that?) and used for the custom HS4
> cards we have installed on the IO nodes, which explains why I see
> only 60 instead of 68 threads.
Interesting, I suspected they were masked off for some reason. What
does the following say on one of these?
> the 2 bgvrnic tasks I see spinning at 100% run on threads 58/59 and
> service the connection from ION to CN.
Yup, those are the processes that are faking the bgvrnic_0 IB
interface that is really presenting the 5D torus.
> It looks as though everything is reporting as expected - as long as
> I compile hwloc on the ION itself, it seems to be correct.
> Thanks and sorry for any misunderstanding
No need to apologise, we've learnt something about the BGAS kernel
All the best,
Christopher Samuel Senior Systems Administrator
VLSCI - Victorian Life Sciences Computation Initiative
Email: samuel_at_[hidden] Phone: +61 (0)3 903 55545
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