[Intel-gfx] [PATCH] drm/i915: set IDICOS to medium uncore resources

[Daniel Vetter]

On Fri, May 04, 2012 at 01:40:27PM -0700, Jesse Barnes wrote:
> On Fri,  4 May 2012 18:58:59 -0700
> Ben Widawsky <ben at bwidawsk.net> wrote:
> 
> > I'm seeing about a 5% FPS improvement across various benchmarks on my
> > IVB i3. Rumor has it that the higher end parts show even more benefit.
> > 
> > This derives from a patch originally given to me by Bernard. The docs
> > are  confusing about the definition names (ie. medium really seems
> > like max), but it would seem it gives more cache to the GT at the
> > expense of uncore. This configuration makes the split most in favor
> > of the GT. I've not tried the other IDICOS values.
> 
> Bringing the IRC discussion here.  I think this is really at the
> expense (though not really) of the CPU, since it allows the GPU to use
> more of the shared CPU/GPU cache in the uncore.
> 
> You can fix up the #define names if you want; the MEDIUM etc may be
> from an old, incorrect doc.  They were added awhile back.

Another perk from me: Can you do some benchmarking of this for snb, too?
-Daniel
-- 
Daniel Vetter
Mail: daniel at ffwll.ch
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