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

[Karli Sjöberg]

Den 18 maj 2016 7:48 em skrev Nicolás <nicolas at devels.es>:
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> El 18/05/16 a las 18:11, Karli Sjöberg escribió:
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>> Den 18 maj 2016 7:03 em skrev Nicolás <nicolas at devels.es>:
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>> > Hi Karli,
>> >
>> > El 18/05/16 a las 16:59, Karli Sjöberg escribió:
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>> >>
>> >> Den 18 maj 2016 5:49 em skrev Nicolás <nicolas at devels.es>:
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>> >> > 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
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>> > 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.
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>> > Thanks.
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>> Very interesting. Are your hosts all of the same architecture(family)?
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>> /K
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> 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).

And it doesn't happen with a similar VM in the other datacenter, on the same hardware?

/K

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>> >
>> >> > 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
>> >
>> >
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