CPUs with variable speed clocks ?

[Chip Marshall]

On November 03, 2006, Paul Lussier sent me the following:
> Has anyone here encountered such a beast?
> 
> I ran into a discussion on another mailing list, and that was the
> first I had heard about CPUs with variable speed clocks.  Does anyone
> know how you muck with these under Linux?  I would guess that there's
> some kernel parameter you can toggle to (en|dis)able this feature.
> Would there be a /proc thingy you can 'echo 1' into like some of the
> iptables features as well?

I think it's a fairly common feature among laptop CPUs. I know my
Pentium 3-M laptop had two clock settings, 1.13Ghz and 733Mhz or
thereabouts. Check out the CPUfreq options in the kernel.

Supported frequency scaling CPUs:
http://www.kernel.org/pub/linux/utils/kernel/cpufreq/hardware.html

-- 
Chip Marshall <chip at 2bithacker.net>     http://kyzoku.2bithacker.net/
GCM/IT d+(-) s+:++ a25>? C++ UB++++$ P+++$ L- E--- W++ N@ o K- w O M+
V-- PS+ PE Y+ PGP++ t+@ R@ tv@ b++@ DI++++ D+(-) G++ e>++ h>++ r-- y?
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 191 bytes
Desc: not available
Url : http://mail.gnhlug.org/mailman/private/gnhlug-discuss/attachments/20061103/10dcaf26/signature.bin