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

[Dominique Rodrigues]

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" ?

>>>> 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
>>>>
>>>
>>>
>>>> _______________________________________________
>>>> Spice-devel mailing list
>>>> Spice-devel at 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.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
>>
>
>
>
>> _______________________________________________
>> Spice-devel mailing list
>> Spice-devel at lists.freedesktop.org
>> http://lists.freedesktop.org/mailman/listinfo/spice-devel
-------------- next part --------------
A non-text attachment was scrubbed...
Name: dominique_rodrigues.vcf
Type: text/x-vcard
Size: 296 bytes
Desc: not available
URL: <http://lists.freedesktop.org/archives/spice-devel/attachments/20120118/99ddc542/attachment.vcf>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: smime.p7s
Type: application/pkcs7-signature
Size: 3710 bytes
Desc: S/MIME Cryptographic Signature
URL: <http://lists.freedesktop.org/archives/spice-devel/attachments/20120118/99ddc542/attachment.bin>