Le 18/01/2012 09:44, Alon Levy a écrit :
On Wed, Jan 18, 2012 at 08:06:40AM +0100, Dominique Rodrigues wrote:Hi,Since I use qxl driver in virtual desktop powered by qemu-kvm, I found a strange problem with Gimp. After launching Gimp, open a new windows, and then try to draw something. It appears that the drawing is very slow and does not follow the mouse at all. It is the same if I use spicy, spicec or vnc to connect to my virtual desktop. This problem does not appear with cirrus or vmware graphic drivers. I found that on any Linux distribution (CentOS, RHEL, Scientific Linux, Debian, Ubuntu). I currently use : - qemu-kvm 1.0 compiled with spice support - spice-protocol 0.10.1 - spice 0.10 - spice-gtk 0.7 - xorg-qxl driver 0.16 Is there any explanation for that ?I would assume it is qxl driver cpu bound on something, probably busy waiting on the command ring. Can you run perf top on the guest?
Indeed, during the drawing in Gimp, Xorg takes between 55% and 66% of CPU. After, Xorg goes down to 0.3%. (Test done on CentOS 6.2 guest, with 1280 Mb vRAM)
Regards, -- Dominique Rodrigues nanoClouD<http://www.nanocloud.com> 8, rue Lemercier 75017 Paris France standard : +33 1 77 69 64 38 529 002 743 R.C.S. Paris begin:vcard fn:Dominique Rodrigues n:Rodrigues;Dominique org:nanoClouD adr:;;8, rue Lemercier;Paris;;75017;France email;internet:dominique.rodrig...@nanocloud.com title:Directeur Technique tel;work:+33 (0) 1 77 69 64 38 tel;cell:+33 (0) 6 28 52 37 70 url:www.nanocloud.com version:2.1 end:vcard_______________________________________________ Spice-devel mailing list Spice-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/spice-devel
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