mobile pentium mmx?

mobile pentium mmx?

[fikin]

could someone direct me at a solution to frequency scaling of intel "mobile
pentium mmx" ?

some years ago i think there was some  kind of support for them but now i
can't find anything at all ...

fikin

Re: mobile pentium mmx?

[Dave Jones]

On Fri, Aug 17, 2007 at 11:19:05PM +0300, fikin wrote:
 > could someone direct me at a solution to frequency scaling of intel "mobile
 > pentium mmx" ?
 > 
 > some years ago i think there was some  kind of support for them but now i
 > can't find anything at all ...

Intel didn't add speedstep capability until the Mobile Pentium III.

	Dave

-- 
http://www.codemonkey.org.uk

Re: mobile pentium mmx?

[fikin]

>Intel didn't add speedstep capability until the Mobile Pentium III.

right, here question is about something older.

this processor family apparently has freq scaling as the bios is able to do
it.
and few years back i remember kernel 2.6 had acpi or cpufreq proc/sys
interface where i could play with the throttling.
this did the job of scaling.
but nowadays i can't find anything which remotely would do the same job...

fikin

Re: mobile pentium mmx?

[Dave Jones]

On Mon, Aug 27, 2007 at 01:26:20PM +0300, fikin wrote:
 > >Intel didn't add speedstep capability until the Mobile Pentium III.
 > 
 > right, here question is about something older.
 > 
 > this processor family apparently has freq scaling as the bios is able to do
 > it.

Probably implemented using clock modulation, which doesn't really save
any power.  Although, prior to speedsteps existance there were a few
implementations of clock frequency shifting by some vendors, but they
were vendor specific, and no documentation on how these work exists.
They were also usually not able to shift at runtime (messing with
bus speeds before speedstep arrived was extremely fragile), only selectable
in the BIOS.

 > and few years back i remember kernel 2.6 had acpi or cpufreq proc/sys
 > interface where i could play with the throttling.
 > this did the job of scaling.

throttling != scaling.

 > but nowadays i can't find anything which remotely would do the same job...

acpi throttling interface should still be present in
/proc/acpi/processor/throttling, but this has nothing to do with cpufreq
at all.

	Dave

-- 
http://www.codemonkey.org.uk