Re: [Xen-devel] Poor performance with Linux 3.x as dom0

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Thu, 2012-05-03 at 11:43 +0100, Andreas Kinzler wrote:
> On 02.05.2012 15:31, Ian Campbell wrote:
> > Did you happen to also compare 3.2.12 and 2.6.34.10 running these
> > workloads natively?
> 
> Yes, I tested against 2.6.32.x. Differences exist, but are minor.

Good to know, thanks for testing

The other potential Xen perf thing which just occurred to to me is the
ACPI power management stuff which the xen-acpi-processor patches in
3.4-rcN are fixing. These are necessary to enable things like turbo mode
so have a pretty large perf impact.

Are you able to try the latest 3.4-rc kernel?

I'm not sure if backports to the kernels you are running exist or not,
Konrad? 

Ian.


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