* mobile pentium mmx?
@ 2007-08-17 20:19 fikin
2007-08-22 23:57 ` Dave Jones
0 siblings, 1 reply; 4+ messages in thread
From: fikin @ 2007-08-17 20:19 UTC (permalink / raw)
To: cpufreq
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
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: mobile pentium mmx?
2007-08-17 20:19 mobile pentium mmx? fikin
@ 2007-08-22 23:57 ` Dave Jones
2007-08-27 10:26 ` fikin
0 siblings, 1 reply; 4+ messages in thread
From: Dave Jones @ 2007-08-22 23:57 UTC (permalink / raw)
To: fikin; +Cc: cpufreq
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
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: mobile pentium mmx?
2007-08-22 23:57 ` Dave Jones
@ 2007-08-27 10:26 ` fikin
2007-08-31 20:29 ` Dave Jones
0 siblings, 1 reply; 4+ messages in thread
From: fikin @ 2007-08-27 10:26 UTC (permalink / raw)
To: cpufreq
>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
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: mobile pentium mmx?
2007-08-27 10:26 ` fikin
@ 2007-08-31 20:29 ` Dave Jones
0 siblings, 0 replies; 4+ messages in thread
From: Dave Jones @ 2007-08-31 20:29 UTC (permalink / raw)
To: fikin; +Cc: cpufreq
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
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2007-08-31 20:29 UTC | newest]
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2007-08-17 20:19 mobile pentium mmx? fikin
2007-08-22 23:57 ` Dave Jones
2007-08-27 10:26 ` fikin
2007-08-31 20:29 ` Dave Jones
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