From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jesse Barnes Subject: Re: [PATCH] drm/i915: set IDICOS to medium uncore resources Date: Fri, 4 May 2012 13:40:27 -0700 Message-ID: <20120504134027.579ea57e@jbarnes-x220> References: <1336183139-10286-1-git-send-email-ben@bwidawsk.net> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from oproxy8-pub.bluehost.com (oproxy8-pub.bluehost.com [69.89.22.20]) by gabe.freedesktop.org (Postfix) with SMTP id 724FE9E9AD for ; Fri, 4 May 2012 13:40:34 -0700 (PDT) In-Reply-To: <1336183139-10286-1-git-send-email-ben@bwidawsk.net> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: intel-gfx-bounces+gcfxdi-intel-gfx=m.gmane.org@lists.freedesktop.org Errors-To: intel-gfx-bounces+gcfxdi-intel-gfx=m.gmane.org@lists.freedesktop.org To: Ben Widawsky Cc: intel-gfx@lists.freedesktop.org, "Kilarski, Bernard R" List-Id: intel-gfx@lists.freedesktop.org On Fri, 4 May 2012 18:58:59 -0700 Ben Widawsky 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