Re: aibs and cpuctl identify [was Re: acpicpu slowing down computer [was Re: firefox slowness -- X server problem?]]

[Jukka Ruohonen <jruohonen%iki.fi@localhost>]

On Fri, Aug 20, 2010 at 11:06:16AM +1000, matthew green wrote:
> my core2 Q9450 usually comes up with the wrong speed as measured
> by netbsd too:
> 
>   cpu0: Intel Core 2 Extreme (686-class), 42028.48 MHz, id 0x10677
> 
> the bios string is valid, though:
> 
>   cpu0: "Intel(R) Core(TM)2 Quad  CPU   Q9450  @ 2.66GHz"

I think you can not any more reliably calculate the frequency neither with
new AMD nor with new Intel processors, at least not as easily as before. 
See for instance the discussion in [1].

- Jukka.

[1] http://download.intel.com/design/processor/applnots/320354.pdf