From: Phillip Susi <psusi@cfl.rr.com>
To: Alex Deucher <alexdeucher@gmail.com>
Cc: dri-devel@lists.freedesktop.org
Subject: Re: Information resources
Date: Fri, 25 Feb 2011 18:03:38 -0500 [thread overview]
Message-ID: <4D68354A.2060803@cfl.rr.com> (raw)
In-Reply-To: <AANLkTin6czfh2QvVj7dhxsGLsvZhj-jFVUxdS3LQEirK@mail.gmail.com>
On 02/25/2011 03:38 PM, Alex Deucher wrote:
> The CP firmware has nothing to do with the temperature. The CP
> firmware is just a packet parser for reading in command buffers and
> programming the register backbone. Just alike a CPU, the GPU runs at
> whatever speed it's clock is set to. You can manually force lower
> power states using sysfs. See the power management section of this
> page:
> http://wiki.x.org/wiki/RadeonFeature
I have tried writing low to power_profile and it seems to make little to
no difference. A cpu executing a tight loop busy waiting for something
to do wastes a lot more power than one that has executed a HLT
instruction, or used even better stop states to gate off clocks that are
not needed. It seems to me that when there is nothing for the GPU to
do, it also should stop executing instructions and gate off any unneeded
clocks.
next prev parent reply other threads:[~2011-02-25 23:03 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-02-24 19:50 Information resources Phillip Susi
2011-02-24 23:03 ` Jerome Glisse
2011-02-25 14:38 ` Phillip Susi
2011-02-25 20:03 ` Dave Airlie
2011-02-25 20:42 ` Phillip Susi
2011-02-25 20:56 ` Dave Airlie
2011-02-25 21:12 ` Garry Hurley
2011-02-25 23:09 ` Phillip Susi
2011-02-25 23:19 ` Alex Deucher
2011-02-25 23:30 ` Phillip Susi
2011-02-25 23:50 ` Alex Deucher
2011-02-25 20:15 ` Garry Hurley Jr.
2011-02-25 20:38 ` Alex Deucher
2011-02-25 23:03 ` Phillip Susi [this message]
2011-02-25 23:06 ` Alex Deucher
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