Re: (ondemand) CPU governor regression between 2.6.23 and 2.6.24

[Ingo Molnar]

* Peter Zijlstra <a.p.zijlstra@xxxxxxxxx> wrote:

> On Sun, 2008-01-27 at 17:57 +0100, Toralf Förster wrote:
> 
> > It would be nice to run a grid application at lowest priority 
> > without impact to power / fan / temperature but OTOH have full 
> > performance for desktop applications, isn't it ?
> 
> This can be achieved by giving the group/uid the grid application uses 
> a weight of 2.

yes, that's the correct solution. For example, the following line in 
/etc/rc.d/rc.local:

echo 2 > /sys/kernel/uids/`grep -w nobody /etc/passwd | cut -d: -f3`/cpu_share

sets user 'nobody' to a very low cpu weight. If there's any grid user, 
it can be done similarly. The default is 1024.

	Ingo
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