On 18 May 2011 19:04, Chris Wilson <ch...@chris-wilson.co.uk> wrote: > On Wed, 18 May 2011 12:38:44 +0100, Daniel J Blueman > <daniel.blue...@gmail.com> wrote: >> Hi Chris et al, >> >> On my Sandy Bridge GPU (8086:0126 rev 09) laptop, I often see hangs >> that are correctly recovered and sometimes ones which aren't (causing >> X lockup or kernel hard lock), hurting usability. >> >> I'm able to reproduce GPU hangs often with the composite tests in >> rendercheck (may need to restart a few times): >> >> $ ./rendercheck -t composite,cacomposite >> Begin composite mask test on a8 >> <command hang, maybe GPU hang too> > > Reproducing use rendercheck is unusual, as that is something that we do > run frequently. > > Looking through the i915_error_state made me wince (lots of 1x1 copies > over the same pixel...) but it does remind me of > > https://bugzilla.kernel.org/show_bug.cgi?id=27892 > > for which the workaround is to flush the caches after every op (Option > "DebugFlushCaches" "True").
After considerable time with 'DebugFlushCaches' enabled, I still hit a crash. With just 'DebugFlushBatches', it's solid so far (>20 sigma). Sometimes, I still see the hangcheck timer get hit [1] but nothing more. This is quite a heavy-handed workaround and is instrumental to stability, so it would be really good going to find a more specific workaround that will be enabled by default. Thanks, Daniel --- [1] [ 43.015860] [drm:i915_hangcheck_ring_idle] *ERROR* Hangcheck timer elapsed... blt ring idle [waiting on 8471, at 8471], missed IRQ? [30413.917749] [drm:i915_hangcheck_ring_idle] *ERROR* Hangcheck timer elapsed... blt ring idle [waiting on 1390703, at 1390703], missed IRQ? [33033.624549] [drm:i915_hangcheck_ring_idle] *ERROR* Hangcheck timer elapsed... blt ring idle [waiting on 4186964, at 4186964], missed IRQ? -- Daniel J Blueman _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/intel-gfx
