Re: [Xen-devel] Xen 4.2.2 / KVM / VirtualBox benchmark on Haswell

[Dario Faggioli <dario.faggioli@xxxxxxxxxx>]

On mar, 2013-07-09 at 16:54 +0100, Gordan Bobic wrote:
>  The process migration overheads are _expensive_
>
Indeed!

>  - I found that on bare
>  metal pining CPU/RAM intensive processes to cores made a ~20%
>  difference to overall throughput on a C2Q class CPU (no shared caches
>  between the two dies made it worse). I expect 4.3.x will be a
>  substantial improvement with NUMA awareness improvements to the
>  scheduler (looking forward to trying it this weekend).
> 
Well, yes, something good could be expected, although the actual
improvement will depend on the number of involved VMs, their sizes, the
workload they're running, etc.

When I tried to use kernel compile as a benchmark for the NUMA effects,
it did not turn out that useful to me (and that's why I switched to
SpecJBB), but perhaps it was me that was doing something wrong...

Anyway, if you do anything like this, please, do let us know here (and,
please, Cc me :-P).

Thanks and Regards,
Dario

-- 
<<This happens because I choose it to happen!>> (Raistlin Majere)
-----------------------------------------------------------------
Dario Faggioli, Ph.D, http://about.me/dario.faggioli
Senior Software Engineer, Citrix Systems R&D Ltd., Cambridge (UK)

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