lkml.org 
[lkml]   [2005]   [Jul]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: enhanced intel speedstep feature was Re: speedstep-centrino on dothan
From Dominik Brodowski on Thursday, 07 July, 2005:
>On Thu, Jul 07, 2005 at 03:51:17PM -0500, Joseph Pingenot wrote:
>> >Just a latest question: can be p4-clockmod used together with
>> >speedstep-centrino? If not, would it make any sense to patch
>> >speedstep-centrino to use this feature too?
>> I'm a little confused. How is this different from the ACPI CPU throttling
>> states (/proc/acpi/processor/CPUn/limit to set, throttling to see all
>> T-states available)?
>T-states _tend_ to be utilized using chipset logic, while p4-clockmod is
>done in-CPU.
>> On my 1.5-year-old Pentium-M, frequency scaling and T-states are different
>> beasties, and act entirely differently. I'm currently in the process of
>> rewriting my governor's brain to deal with the two more intelligently.
>In your case, I would care about throttling. In very most cases it actually
>increases energy consumption, as the state being entered is technically the
>same to ACPI C2 (IIRC), so it is only "forced" idling and only useful if
>"forced" idling is needed to not need active cooling.

Why would this cause more energy consumption?

-Joseph

--
trelane@digitasaru.net--------------------------------------------------
Graduate student in physics, Free Software developer.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-07-08 00:00    [W:0.051 / U:0.396 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site