CPU Speed in HAL

[Ross Burton]

On Fri, 2005-11-25 at 15:03 +0000, Richard Hughes wrote:
> > > CPU speed is usually taken care of by system daemons such as cpuspeed,
> > > cpufreqd, powernowd, speedy or by a setuid applet such as the cpufreq
> > > applet. 
> > 
> > What is the problem with a system daemon for this task? 
> 
> Extra complexity and dependencies. Yet another daemon to configure.

I personally prefer the powernowd approach, which has no configuration.
It monitors cpu load and scales the processor speed as required, and
Just Works.  No options, no settings, just apt-get install powernowd (on
Debian) and it Just Works.

The only time the user *actually* cares about the CPU speed is when
doing clock-time profiling, in that situation scaling is a nightmare.
Exclude that case (user turns off powernowd before profiling) and all
most users really want is longer battery life, which is what powernowd
gives them.

Ross
-- 
Ross Burton                                 mail: ross at burtonini.com
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