On Wed, Jan 18, 2012 at 11:39:13AM +0100, Dominique Rodrigues wrote: > Le 18/01/2012 11:32, Alon Levy a écrit : > >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. > > > Ok. So how do you profile debug messages afterwhile ? > > If I "tail -f /var/log/Xorg.0.log", the only message I got is : > > Bad bpp: 1 (1) > > Other messages look standard. >
Right, that's not interesting. What I meant was: # yum install perf # perf top copy paste the top entries. > >>>>>>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 > >>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 > >> > > > > > 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
