From: Dario Faggioli <dario.faggioli@citrix.com>
To: Gordan Bobic <gordan@bobich.net>
Cc: lars.kurth@xen.org, xen-devel@lists.xen.org
Subject: Re: Xen 4.2.2 / KVM / VirtualBox benchmark on Haswell
Date: Thu, 11 Jul 2013 12:53:48 +0200 [thread overview]
Message-ID: <1373540028.12772.31.camel@Solace> (raw)
In-Reply-To: <dce25df4538ee4ddd0337067c3234b12@mail.shatteredsilicon.net>
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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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next prev parent reply other threads:[~2013-07-11 10:53 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-09 15:27 Xen 4.2.2 / KVM / VirtualBox benchmark on Haswell Lars Kurth
2013-07-09 15:40 ` Thanos Makatos
2013-07-09 15:53 ` Ian Murray
2013-07-09 15:56 ` Thanos Makatos
2013-07-09 16:14 ` Gordan Bobic
2013-07-09 16:21 ` Thanos Makatos
2013-07-09 16:26 ` Gordan Bobic
2013-07-09 15:54 ` Gordan Bobic
2013-07-11 10:53 ` Dario Faggioli [this message]
2013-07-11 16:23 ` George Dunlap
2013-07-11 16:27 ` Dario Faggioli
2013-07-11 17:49 ` Gordan Bobic
2013-07-09 16:52 ` Alex Bligh
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