On Sun, 27 Nov 2011 18:58:17 +0100, Daniel Vetter <daniel.vetter at ffwll.ch> wrote: > Otherwise hangcheck spuriously fires when running blitter/bsd-only > workloads. > > Contrary to a similar patch by Ben Widawsky this does not check > INSTDONE of the other rings. Chris Wilson implied that in a failure to > detect a hang, most likely because INSTDONE was fluctuating. Thus only > check ACTHD, which as far as I know is rather reliable. Also, blitter > and bsd rings can't launch complex tasks from a single instruction > (like 3D_PRIM on the render with complex or even infinite shaders). > > This fixes spurious gpu hang detection when running > tests/gem_hangcheck_forcewake on snb/ivb. > > Signed-Off-by: Daniel Vetter <daniel.vetter at ffwll.ch> Reviewed-by: Chris Wilson <chris at chris-wilson.co.uk> -Chris -- Chris Wilson, Intel Open Source Technology Centre
