On Wed, Apr 10, 2013 at 08:45:11PM +0100, Chris Wilson wrote: > Haswell introduces a separate frequency domain for the ring (uncore). So > where we used to increase the CPU (IA) clock with GPU busyness, we now > need to scale the ring frequency directly instead. As the ring limits > our memory bandwidth, it is vital for performance that when the GPU is > busy, we increase the frequency of the ring to increase the available > memory bandwidth. > > v2: Fix the algorithm to actually use the scaled gpu frequency for the ring. > > Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk> > Cc: Jesse Barnes <jbarnes at virtuousgeek.org> I think this is another reason to split hsw rps code from snb/ivb. I think I'll wait until Rodrigo's patch is in, and then apply this. Call me a scared chicken, but I kinda am wrt rps stuff ;-) -Daniel -- Daniel Vetter Software Engineer, Intel Corporation +41 (0) 79 365 57 48 - http://blog.ffwll.ch
