[LAU] unable to set scheduling priority with rt kernel

[Chuckk Hubbard]

On 10/24/07, Fernando Lopez-Lezcano <nando at ccrma.stanford.edu> wrote:
>
> On Wed, 2007-10-24 at 15:59 +0300, Chuckk Hubbard wrote:
> > Hi doc, thanks for the guess.  sudo chrt does work, though.  I'm
> > supposed to not need it with the rt-patched kernel, which allows
> > non-root users to set high priorities.
>
> Not exactly right. The rt-patched kernel (Ingo's patches) only optimizes
> the max latency paths in the kernel. Other software is what allows
> non-root users to use SCHED_FIFO scheduling. There are several options,
> the current one is /etc/security/limits.conf through PAM, there are
> others.


I see; that makes more sense now.
Any idea why Linux wouldn't honor /etc/security/limits.conf?

>         > /etc/security/limits.conf has:
> >         > @audio         -     nice         -10
> >         > @audio         -     rtprio         99
> >         > @audio         -     memlock     4000000 (someone on the
> >         jack list
> >         > suggested that my previous value "unlimited" was not
> >         recognized, so I
> >         > stuck this in but no change)
> >         >
> >         > and user "chuckk" is in group "audio".
>

Still true.

-Chuckk

-- 
http://www.badmuthahubbard.com
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