Which criteria used for speedstep policy?

Ow Mun Heng ow.mun.heng at wdc.com
Wed Nov 19 09:39:17 UTC 2003

> -----Original Message-----
> From: Peter Boy [mailto:pboy at barkhof.uni-bremen.de]
> Sent: Wednesday, November 19, 2003 5:25 PM
> To: fedora-list at redhat.com
> Subject: Which criteria used for speedstep policy?
> The current kernel support for speedstep technology uses a policy
> approach to determine the appropriate processor speed.
> Please, can someone point me to documentation which criteria are used?
> And are there tools to determine the effect of specific workload?

I believe the kernel  is now using the centrino_speedstep.c code. (I may be
wrong with the file name) and it uses the cpufreq code to produce scaling.

For Dynamic loading, there's cpudyn but I hear the new cpufreqd is better
than cpudyn.

I'm not sure if this answers your Q or if it was the correct thing to answer
in the 1st place.

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