Hi, I've searched to no avail: is it possible to use video virtio (instead of qxl) in a VM managed by oVirt? I have much better performance with video virtio when testing this with "plain" libvirt. I would have at least expected to find some feature request or something alike when searching. Does anybody know anything about this being on some ToDo list? Or has this really escaped everybody's notice? - Michael
On Tue, Jul 14, 2020 at 11:44 AM Michael Lipp <mnl@mnl.de> wrote:
Hi,
I've searched to no avail: is it possible to use video virtio (instead of qxl) in a VM managed by oVirt? I have much better performance with video virtio when testing this with "plain" libvirt.
I would have at least expected to find some feature request or something alike when searching. Does anybody know anything about this being on some ToDo list? Or has this really escaped everybody's notice?
- Michael _______________________________________________
Do you mean virtio-vga / virtio-gpu? It seems it only supports Linux guests with kernel >= 4.4 and mesa >= 11.2 and also compiled with option gallium-drivers=virgl So probably many guests would be left out... Anyway it could be an interesting option for newer guests, if you say that you get better performances and if it is stable enough... Gianluca
Do you mean virtio-vga / virtio-gpu?
virtio-vga. To be specific (libvirt): <video> <model type='virtio' heads='1' primary='yes'> <acceleration accel3d='no'/> </model> <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/> </video> which results in: -device virtio-vga,id=video0,virgl=off,max_outputs=1,bus=pci.0,addr=0x2 This works perfectly with my Fedora 32 and Arch guests and the change is really worth it.
On 14 Jul 2020, at 13:48, Michael Lipp <mnl@mnl.de> wrote:
Do you mean virtio-vga / virtio-gpu?
virtio-vga. To be specific (libvirt):
<video> <model type='virtio' heads='1' primary='yes'> <acceleration accel3d='no'/> </model> <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/> </video>
which results in:
-device virtio-vga,id=video0,virgl=off,max_outputs=1,bus=pci.0,addr=0x2
This works perfectly with my Fedora 32 and Arch guests and the change is really worth it.
Hi, what kind of performance benefits you’ve seen? It’s not currently in near term roadmap, but if anyone wants to contribute patches I don’t see a problem including it as an option for newer guests indeed. Thanks, michal
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participants (3)
-
Gianluca Cecchi -
Michael Lipp -
Michal Skrivanek