[ovirt-users] 100% memory usage on desktop environments

[Nicolás]

El 18/05/16 a las 18:11, Karli Sjöberg escribió:
>
>
> Den 18 maj 2016 7:03 em skrev Nicolás <nicolas at devels.es>:
> >
> > Hi Karli,
> >
> > El 18/05/16 a las 16:59, Karli Sjöberg escribió:
> >>
> >>
> >> Den 18 maj 2016 5:49 em skrev Nicolás <nicolas at devels.es>:
> >> >
> >> > Hi,
> >> >
> >> > Probably not an oVirt issue, but maybe someone can help. I've 
> deployed a
> >> > pretty basic VM (ubuntu 14.04 server, 4GB RAM, 4 CPUs, 15GB storage).
> >>
> >> Just spitballing here: 14.04 only? Tried 16.04, or any other OS for 
> that matter? For now, it sounds more guest related rather than oVirt.
> >>
> >> /K
> >
> >
> > I tried a vanilla centos-7.1 as well and the same happens. I'm of 
> the same opinion that this is more a guest related issue, it's just 
> I'd like to find out why this only happens with QXL and not with CIRRUS.
> >
> > Thanks.
>
> Very interesting. Are your hosts all of the same architecture(family)?
>
> /K
>

Actually we have a nice mixture of manufacturers. We run 7 hosts, paired 
4-2-1 in relation to architecture. All of them have the same resources, 
though (CPUs + RAM). In this case, I can't test the VM on different 
hosts because we've separated one of them (one of the "4") on a 
standalone oVirt datacenter as we're making tests on it, but I remember 
this has already happened to me in the past (I didn't have the time to 
debug it at that time, though).

> >
> >> > Each time I install an additional desktop environment (Gnome, KDE,
> >> > whatever...), CPU usage rises to 100% all time to the extreme that
> >> > interacting with the machine becomes impossible (maybe a mouse 
> movement
> >> > is propagated 3 minutes later or so...).
> >> >
> >> > To debug this, I installed LXDE, which is a lightweight desktop
> >> > environment based on Xorg. I could see there is an Xorg process
> >> > consuming one of the CPUs and the machine stops responding as far 
> as the
> >> > desktop environment goes. I have not changed anything in the
> >> > configuration file.
> >> >
> >> > I could also see this only happens when QXL is chosen as the display
> >> > driver. When CIRRUS is chosen, everything works smoothly and CPU is
> >> > ~100% idle. The downside is that we want to use SPICE and CIRRUS 
> won't
> >> > allow it.
> >> >
> >> > Why does this happen? Is this an OS-side driver issue? Any hint 
> how can
> >> > it be fixed?
> >> >
> >> > Thanks.
> >> >
> >> > Nicolás
> >> > _______________________________________________
> >> > Users mailing list
> >> > Users at ovirt.org
> >> > http://lists.ovirt.org/mailman/listinfo/users
> >
> >
>

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.ovirt.org/pipermail/users/attachments/20160518/73eab1c4/attachment-0001.html>