Re: PROBLEM: no cpu MHz in /proc/cpuinfo on 2.6.25.4-rt6

[Jan Engelhardt]

On Wednesday 2008-06-11 15:36, Arjan van de Ven wrote:
>> >> btw this is scary; the Mhz line in /proc/cpuinfo doesn't have much
>> >> meaning really, so applications using it and depending on it is a
>> >> rather big disaster ;-(
>> >> 
>> >> Does anyone know why jackd wants to use this?
>> 
>> It would be nice to have a /sys file where the CPU frequency is in,
>
>may I ask why? What would you do with it?

Off the top off the head, just for reporting to the user. Desklets and stuff.

>If it says 100Mhz, what would you conclude? That you have a slow cpu?
>Or that you have a really fast CPU that currently runs at a low
>frequency because you're mostly idle and are saving power?
>
>CPU frequency is...
>1) not something that is fixed; it changes all the time
>2) not a good indication for performance; remember the 3.4Ghz pentium4,
>a 2Ghz Core2Duo outperforms it
>3) something which the cpu itself barely honors (the clock stops during
>idle etc etc)
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