On Sat, Feb 6, 2010 at 11:47, Émeric Maschino <emeric.masch...@gmail.com> wrote: > 2010/2/4 Jerome Glisse <gli...@freedesktop.org>: >> IIRC old radeon drm doesn't have any thing to dump GPU command stream. >> Look at http://www.x.org/docs/AMD/R5xx_Acceleration_v1.4.pdf to see >> what radeon GPU stream command looks like (packet pm4 stuff). Note that >> dump GPU command stream can quickly eat Gigs of data and finding what >> is causing the lockup is then very cumberstone especialy as in your >> case it sounds like it's a timing issue. You might want to force your >> card into pci mode to see if it's agp related. > > Yep, setting Option "BusType" "PCI" in /etc/X11/xorg.conf prevents > from GPU lockup. > > A a side note, strace glxinfo and strace glxgears still give me read() > errors on /tmp/.X11-unix/X0, so they're probably not related to GPU > lockup. > > Anyway, I don't know whether this is due to PCI mode or not, but > OpenGL performances, although there's no more GPU lockup, are poor. > And serious OpenGL applications, as simulated by the SPECviewperf test > suite, have very irregular frame rates. If I'm not mistaken, the > BusType option is specific to the radeon driver (or maybe other > drivers too)? I mean, it's not a X.org wide configuration option, > isn't it? This would thus narrow my investigation path to the AGP code > of the radeon driver, right? >
>From what I recall, all the ia64 AGP chipsets (well the zx1 and the 460) have to be run: - without side band adressing - without fast writes - at 4x speed otherwise they're unstable. I think by default agpgart puts them at AGP 1x with fast writes... Stephane ------------------------------------------------------------------------------ The Planet: dedicated and managed hosting, cloud storage, colocation Stay online with enterprise data centers and the best network in the business Choose flexible plans and management services without long-term contracts Personal 24x7 support from experience hosting pros just a phone call away. http://p.sf.net/sfu/theplanet-com -- _______________________________________________ Dri-devel mailing list Dri-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/dri-devel
