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

[Ray Lee]

On Wed, Jun 11, 2008 at 6:36 AM, Arjan van de Ven <arjan@xxxxxxxxxxxxx> wrote:
> CPU frequency is...
> 1) not something that is fixed; it changes all the time

Not necessarily true of setups where jackd is running.

> 2) not a good indication for performance; remember the 3.4Ghz pentium4,
> a 2Ghz Core2Duo outperforms it

Your point only holds if jackd is somehow using this to compare
performance across different cpus. It's not.

> 3) something which the cpu itself barely honors (the clock stops during
> idle etc etc)

Again, that won't be happening when jackd is running.

> Userland apps that use "cpu frequency" seem to be buggy to me, at
> least I don't believe that they understand the complexities about what
> this means,

It doesn't appear you understand what jackd is and what lengths users
will go to to configure their systems for running it smoothly and
reliably.

> and I don't believe that the decisions they make based on
> this will be made correctly.

Please go read the jackd designs slides from the 2003 presentation on
the jack website [1]. The author has a clue, and is quite aware of how
computers work.

   [1] http://lad.linuxaudio.org/events/2003_zkm/slides/paul_davis-jack/title.html
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