Enhanced SpeedStep driver available

Toxa postfix at senmail.ru
Tue Aug 17 16:46:50 PDT 2004

On Mon, Aug 16, 2004 at 08:06:30AM -0700, Colin Percival wrote:
>   Thanks to everyone who has been sending me data about their
> processors (and in particular, the 90nm versions), I now have
> a first draft of a Enhanced SpeedStep driver available.  For
> people with the appropriate processors (Pentium M only), this
> makes it possible to adjust the cpu frequency via a new sysctl
> (hw.est_curfreq), and have the cpu voltage adjusted at the
> same time.
>   I've also put together a very simple control daemon which
> reads kern.cp_time every second and adjusts the cpu frequency
> based on the fraction of cpu time which is idle.  This increases
> my laptop's battery life by around 40%.
>   All the code is online at
> http://www.daemonology.net/freebsd-est/
>   Assuming I don't hear any major bug reports in the next few
> days, I'll package these into ports and hopefully get them into
> the ports tree in time for 5.3-RELEASE.

I'm curious about processor's name. My laptop (sony vaio pcg-v505bx) has a Pentium 4 M, but not Centrino (which name is... Pentium 4 M too), afaik it's capable to support speedsted, (enhanced or not?). When loading your module:

[(3:40)(85.32%)(p1):~/tmp/est ] sudo kldload ./est.ko 
[(3:40)(85.32%)(p1):~/tmp/est ] kldstat|grep est
27    1 0xc23cd000 2000     est.ko
[(3:40)(85.32%)(p1):~/tmp/est ] sysctl hw.est_curfreq
[(3:40)(85.32%)(p1):~/tmp/est ] sysctl hw.est_freqs 

e.g. nothing
Is this for Centrino processors only? 

p.s.: from dmesg:

CPU: Mobile Intel(R) Pentium(R) 4 - M CPU 2.00GHz (1193.11-MHz
686-class CPU)
  Origin = "GenuineIntel"  Id = 0xf27  Stepping = 7

Anton A. Karpov

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