[Spice-devel] Delay in Gimp when using qxl driver

[Alon Levy]

On Wed, Jan 18, 2012 at 11:27:14AM +0100, Dominique Rodrigues wrote:
> Le 18/01/2012 11:18, Alon Levy a écrit :
> >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.
> >
> 
> I installed qxl driver from freedesktop.org :
> 
> # wget -c http://xorg.freedesktop.org/releases/individual/driver/xf86-video-qxl-0.0.16.tar.bz2
> # tar xvfj xf86-video-qxl-0.0.16.tar.bz2
> # cd xf86-video-qxl-0.0.16
> # ./configure --libdir=/usr/lib64 --prefix=/usr CFLAGS='-O3'
> # make
> # make install
> 
> Do you mean that I should use CFLAGS with "-g" ?

I think that's it, yes.

> 
> >>>>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.rodrigues at 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
> >>>>
> >>>
> >>>
> >>>>_______________________________________________
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> >>>>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.rodrigues at nanocloud.com
> >>title:Directeur Technique
> >>tel;work:+33 (0) 1 77 69 64 38
> >>tel;cell:+33 (0) 6 28 52 37 70
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> >>
> >
> >
> >
> >>_______________________________________________
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> >>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.rodrigues at 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
>