Alon Levy píše v St 18. 01. 2012 v 12:18 +0200: > On Wed, Jan 18, 2012 at 09:54:49AM +0100, Dominique Rodrigues wrote: > > > > 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) > > ok, can you drill down - you should be able to install the debug symbols > for the qxl driver (xorg-x11-drv-qxl package) and see the specific > functions that are taking the most time. >
Alon, is there similar procedure for Windows guests? I guess something like this would help tracking down Autocad performance issues. David > > > > >>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 > > > 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 > > _______________________________________________ > Spice-devel mailing list > Spice-devel@lists.freedesktop.org > http://lists.freedesktop.org/mailman/listinfo/spice-devel -- David Jaša, RHCE SPICE QE based in Brno GPG Key: 22C33E24 Fingerprint: 513A 060B D1B4 2A72 7F0D 0278 B125 CD00 22C3 3E24 _______________________________________________ Spice-devel mailing list Spice-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/spice-devel
