Re: Howto switch system/CPU states?

On Tue, Nov 05, 2002 at 01:29:01AM +0000, Chris Howells wrote:

Hi,

On Monday 04 November 2002 6:57 am, Dominik Brodowski wrote:

quoted

On Sun, Nov 03, 2002 at 10:02:00PM -0800, Happy Camper wrote:

quoted

2. Switch CPU C states.  When I load the processor module, I get this
in the /var/log/messages :
Nov  3 16:09:25 localhost kernel: ACPI: Processor [CPU] (supports C1 C2
C3, 8 throttling states)
However I cant figure out how to switch these processor states.

http://www.brodo.de/english/pub/acpi/proc/processor.html

In the current ACPI patches (e.g. without the ACPI to cpufreq stuff), does the
switching CPU states have any actual effect?

Yes, it should. Although you don't know whether it works until you have
tested it. cpufreq only offers a cross-architecture interface, device driver
notification, and timer updates (so that delay() loops are correct and
/proc/cpuinfo shows the right frequency).

	Dominik


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