From mboxrd@z Thu Jan  1 00:00:00 1970
From: Daniel Vetter <daniel@ffwll.ch>
Subject: Re: [PATCH] drm/i915/bdw: Use timeout mode for RC6 on
	bdw
Date: Fri, 11 Apr 2014 11:00:38 +0200
Message-ID: <20140411090038.GY9262@phenom.ffwll.local>
References: <1397069046-50906-1-git-send-email-Tom.O'Rourke@intel.com>
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To: "O'Rourke, Tom" <Tom.O'Rourke@intel.com>
Cc: Ben Widawsky <ben@bwidawsk.net>, "intel-gfx@lists.freedesktop.org" <intel-gfx@lists.freedesktop.org>
List-Id: intel-gfx@lists.freedesktop.org

On Thu, Apr 10, 2014 at 08:29:55PM +0000, O'Rourke, Tom wrote:
> >> > Higher RC6 residency is observed using timeout mode instead of EI
> >> > mode.  This applies to Broadwell only.
> >> > The difference is particularly noticeable with video playback.
> >> >
> >> > Issue: VIZ-3778
> >> > Change-Id: I62bb12e21caf19651034826b45cde7f73a80938d
> >> > Signed-off-by: Tom O'Rourke <Tom.O'Rourke@intel.com>
> >>
> >> How recent a nightly branch have you used to obtain these results?
> >> Chris just fixed some serious bugs in the gpu booster logic which
> >> would have affected all intermediate workloads.
> >> -Daniel
> >
> >He must not be using nightly if he has any BDW RC6 residency at all.
> >
> [TOR:] Ben is correct.  I was testing mostly with a kernel for Android.
> I also tested with Ben's broadwell branch and saw similar improvement.

Ok I think it'd be good to have this when we actually merge/enable the
final pieces of the bdw rc6 code. Can you please work together with Ben to
make sure this patch isn't lost?

Or who is shepherding bdw rc6 nowadays?
-Daniel
-- 
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch