From: Eric Anholt <eric@anholt.net>
To: ykzhao <yakui.zhao@intel.com>
Cc: linux-acpi@vger.kernel.org,
"intel-gfx@lists.freedesktop.org"
<intel-gfx@lists.freedesktop.org>,
arjan@linxu.intel.com
Subject: Re: [PATCH 4/4] cpuidle: Hack iowait weighting to avoid C-state reduction for graphics.
Date: Tue, 02 Nov 2010 08:42:24 -0700 [thread overview]
Message-ID: <87fwvj7mvz.fsf@pollan.anholt.net> (raw)
In-Reply-To: <1288700414.26046.18.camel@localhost.localdomain>
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On Tue, 02 Nov 2010 20:20:14 +0800, ykzhao <yakui.zhao@intel.com> wrote:
> On Tue, 2010-11-02 at 04:23 +0800, Eric Anholt wrote:
> > Improves nexuiz performance by about 1% on my system.
>
> CC: Arjan and linux-acpi mailing list.
>
> It seems that the selection of C-state will become very sensitive to IO
> wait after the multi factor is changed from 10 to 1000.
> Maybe only one IO/wait will bring that the system can't enter the deep
> C-state.
Note the original message that said "This patch series is a hack, if it
helps anyone I'll rewrite it to do the right thing".
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next prev parent reply other threads:[~2010-11-02 15:42 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-01 20:23 [RFC] Hack to avoid C-state reduction during graphics activity Eric Anholt
2010-11-01 20:23 ` [PATCH 1/4] sched: Export io_schedule_timeout() Eric Anholt
2010-11-01 20:23 ` [PATCH 2/4] Add io_ variants of wait_event() and wait_event_interruptible() Eric Anholt
2010-11-01 20:23 ` [PATCH 3/4] drm/i915: Declare waits on GPU as io waits, to reduce C-state reduction Eric Anholt
2010-11-01 20:23 ` [PATCH 4/4] cpuidle: Hack iowait weighting to avoid C-state reduction for graphics Eric Anholt
2010-11-02 12:20 ` [Intel-gfx] " ykzhao
2010-11-02 15:42 ` Eric Anholt [this message]
2010-11-02 20:00 ` Alexey Fisher
2010-11-02 20:44 ` Chris Wilson
2010-11-01 21:00 ` [RFC] Hack to avoid C-state reduction during graphics activity Andrew Lutomirski
2010-11-01 21:43 ` Eric Anholt
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