speedstep vs throttling, what's the difference?

carbon · Guru Joined: 27 Jun 2003 Posts: 455 Location: New York

AFAIK, my pentium m 1.3 ghz can only scale down to a minimum speed of 600mhz. But the throttling under /proc/acpi/processer/CPU/ i can cat 7 to it to have it run at appoximately 101mhz.

So how does throttling related to the speed step that pentium m has?
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Earthwings · Posted: Wed Apr 07, 2004 11:42 pm Post subject:

Throttling works by periodically enforcing the CPU to sleep for a short amount of time. It doesn't save much energy, but reduces the temperature.

CPU frequency scaling *really* scales the CPU frequency down to something lower and saves energy and reduces the temperature.
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carbon · Guru Joined: 27 Jun 2003 Posts: 455 Location: New York

so if i wanna scale down the freq of the cpu, what to do?
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dtor · Guru Joined: 19 Jan 2004 Posts: 461 Location: Indiana, USA

carbon · Guru Joined: 27 Jun 2003 Posts: 455 Location: New York

yeah, thanks for the info, but back to my question. how do i scale down frequency and voltage, instead of just messing around with the throttling.
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Earthwings · Posted: Thu Apr 08, 2004 1:32 pm Post subject:

Have you tried the howto linked in my signature?
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carbon · Guru Joined: 27 Jun 2003 Posts: 455 Location: New York

yeah, i will try that.
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brodo · Guru Joined: 15 Apr 2003 Posts: 319