Impacts of disabling Automatic Power Management

Sridhar Dhanapalan sridhar at
Sat Feb 4 00:13:23 EST 2012

On 2 February 2012 09:09, Richard A. Smith <richard at> wrote:
> Sirdhar:  Unfortunately theres no way we can answer your question ( or even
> make a SWAG) without known how much idleness is in your normal workload.
>  Automatic Power Management only makes a big difference if there is a lot of
> time spent idle.  If you are running Tam-Tam the entire time then turning
> off aggressive suspend/resume will make zero difference.
> powerd tracks this though so if you can collect some powerd logs from some
> of your users then we can make a guess at figuring out what your impact will
> be.
> powerd logs are located in the ~olcp/power-logs directory.  Copy all the
> files in there off of several machines that have been used in the classroom
> and send them to me and we can take a look at what sort of profile you have.
> What build are you basing your images off of?

We're building from Dextrose 3, which is in turn based on 11.3.0.

This version is still in development and hence isn't used in the
field. I'm not sure how useful data from the currently-deployed OS
(10.1.3) would be.


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