Bug#421879: cpufreq_ondemand: cpufreq_ondemand responds too slowly

[Mattia Dongili <malattia@linux.it>]

On Wed, May 09, 2007 at 01:49:17AM +0100, Greg Kochanski wrote:
> I got the following response from Intel.   It's a little confused,
> perhaps.   Or, maybe if you have ACPI turned on properly, perhaps
> the kernel can read the latency from the processor itself.

Yes, it's a bit confusing/confused.
They are talking about P-states, the p4_clockmod deals with throttling
(T-states), not frequency scaling[1].
So I guess they didn't get your question right or you didn't include the
necessary information.

Also, you may want to redirect most of this discussion to the
cpufreq@lists.linux.org.uk mailing list (where probably the same
engineer that answered to you is usually hanging out). Sorry for not
mentioning that before.

[1]: Basically throttling the processor just add idle cycles without
saving any power, frequency scaling actually scales voltage and
frequency.

-- 
mattia
:wq!