Re: [PATCH] drm/i915: set IDICOS to medium uncore resources

[Jesse Barnes <jbarnes@virtuousgeek.org>]

On Fri,  4 May 2012 18:58:59 -0700
Ben Widawsky <ben@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.

Jesse