From mboxrd@z Thu Jan  1 00:00:00 1970
From: George Dunlap <dunlapg@umich.edu>
Subject: Re: Poor performance with Linux 3.x as dom0
Date: Thu, 3 May 2012 09:32:41 +0100
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To: Andreas Kinzler <ml-xen-devel@hfp.de>
Cc: David Vrabel <dvrabel@cantab.net>, Jeremy Fitzhardinge <jeremy@goop.org>, xen-devel@lists.xensource.com, Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
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On Wed, May 2, 2012 at 6:01 PM, Andreas Kinzler <ml-xen-devel@hfp.de> wrote:
> On 02.05.2012 15:30, David Vrabel wrote:
>>
>> Can you apply 7eb7ce4d2e8991aff4ecb71a81949a907ca755ac "xen: correctly
>> check for pending events when restoring irq flags"[1] and see how much
>> it helps?
>
>
> There is some minor improvement - but it is still far away from xenified
> 2.6.34.10.

Just FYI, the reason Ian suggested making the same comparison for
native is that the performance of linux overall on bare-metal has also
suffered since 2.6.34.  It's likely that a non-trivial amount of the
performance regression is due to moving from 2.6.34 to 3.{2,3}, over
and above whatever regressions may have happened when moving from
xenified to pvops.

 -George