Re: Perception of slowness with xen after upgrading to 7.0

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

On Sun, Oct 18, 2015 at 04:32:20PM +0530, Mayuresh wrote:
> I recently upgraded my laptop from 6.x to NetBSD 7.0 i386.
> 
> Could not compile xentools/kernel 4.2 (it won't complie on 7.0 seems to be
> documented on xen wiki already), so had to resort to 4.1.
> 
> I noticed performance degradation with Xen Dom0 (even with no guest
> running) as well as a Linux DomU running on it. Difficult to put it
> objectively, but it feels when switching between windows, the screen
> doesn't refresh instantaneously as it would normally do etc.
> 
> As 2 things changed simultaneously, Upgrade to 7.x and downgrade to
> xentools/kernel 4.1, I am not sure whether either of them would have
> caused this. (In theory, could be a graphics issue, but unlikely since
> with generic 7.0 kernel I don't see above issue.)

I guess that under 6.x you were running the Intel X11 driver.
Under 7.0 you're probably using the VESA driver as there's no KMS support
for Xen yet. This probably explains why it feels slower.

-- 
Manuel Bouyer <bouyer%antioche.eu.org@localhost>
     NetBSD: 26 ans d'experience feront toujours la difference
--