[LAU] unable to set scheduling priority with rt kernel

[Florian Schmidt]

On Wednesday 24 October 2007, Chuckk Hubbard wrote:
> On 10/24/07, Florian Schmidt <mista.tapas at gmx.net> wrote:
> > On Wednesday 24 October 2007, Chuckk Hubbard wrote:
> > > sudo chrt -fp 82 `pidof "IRQ-16"`
> > > jackd --realtime -P 70 -dalsa -P -p256 -n2 -r44100 &
> > > sudo chrt -fp 70 `pidof "jackd"`
> > > chrt -p `pidof "IRQ-16"`
> > > chrt -p `pidof "jackd"`
> > > exit
> >
> > if you run
> >
> > sudo chrt -fp 70 `pidof "jackd"`
> >
> > as non root without using sudo
> >
> > chrt -fp 70 `pidof "jackd"`
> >
> > do you get an error?
>
> Why no I don't!  And it changes priority.  I swore it didn't work before
> when I tried it.  I've just now added "session required
> /lib/security/pam_limits.so" to /etc/pam.d/common-session, as others
> suggested, maybe that did something?
> So does that mean the -P flag can never set priority 70?  I got it from
> your site!

Well, if chrt works now without sudo, try running 

jackd -R -P 70 -d alsa ...

again. It should work now, too..

Flo





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