From: Daniel Vetter <daniel@ffwll.ch>
To: "Stéphane Marchesin" <marcheu@chromium.org>
Cc: intel-gfx@lists.freedesktop.org
Subject: Re: [PATCH] drm/i915: Ajdust down threshold in intel_pm.
Date: Wed, 4 Jul 2012 09:52:11 +0200 [thread overview]
Message-ID: <20120704075211.GF5375@phenom.ffwll.local> (raw)
In-Reply-To: <1341350202-8664-1-git-send-email-marcheu@chromium.org>
On Tue, Jul 03, 2012 at 02:16:42PM -0700, Stéphane Marchesin wrote:
> The up and down thresholds are very asymetric, so it is possible
> to have a case where a spike of rendering increases the GPU clock to
> the max (because the up threshold is low) and then a simple blinking
> cursor is enough to keep the clock at the maximum speed forever
> (because the down threshold is high).
>
> Lowering the down threshold allows the GPU clock to go back down even
> when there is a blinking cursor on the screen.
>
> Signed-off-by: Stéphane Marchesin <marcheu@chromium.org>
I've just merged Eugeni's hsw rc6 patches - those contain newly tuning
variables. Can you maybe try out whether these would have the same effect?
I'd prefer to simple enable these, presuming that the hw guys we've got
them from did some decent tuning ...
-Daniel
--
Daniel Vetter
Mail: daniel@ffwll.ch
Mobile: +41 (0)79 365 57 48
next prev parent reply other threads:[~2012-07-04 7:52 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-03 21:16 [PATCH] drm/i915: Ajdust down threshold in intel_pm Stéphane Marchesin
2012-07-04 7:52 ` Daniel Vetter [this message]
2012-07-16 19:50 ` Daniel Vetter
2012-08-15 21:46 ` Stéphane Marchesin
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