Re: [LAU] [Jack-Devel] RT_GROUP_SCHED kernel option makes JACK unusable in Ubuntu Natty

On Wed, Dec 15, 2010 at 02:09:49PM +0100, rosea.grammostola wrote:
> On 12/15/2010 12:56 PM, rosea.grammostola wrote:
> >On 12/15/2010 05:33 AM, Ronan Jouchet wrote:
> >>On 10-12-14 02:38 PM, ailo wrote:
> >>>On 12/14/2010 08:06 PM, Alessio Igor Bogani wrote:
> >>>>The -lowlatency 2.6.37-8.21~ppa1 kernel have RT_GROUP_SCHED enabled.
> >>>>Instead the 2.6.37-9.22~ppa1 one's have RT_GROUP_SCHED disabled.
> >>>>
> >>>>Anyone could test those?
> >>>>
> >>>>Ciao,
> >>>>Alessio
> >>>>
> >>>
> >>>On Natty, 2.6.37-9.22~ppa1, Virtualbox
> >>>
> >>>...
> >>
> >>I confirm 2.6.37-9.22~ppa1 from abogani PPA (RT_GROUP_SCHED
> >>disabled) works fine.
> >
> >AFAIK the *.33 kernel from abogani, CONFIG_RT_GROUP_SCHED=y, works
> >fine (using audio.conf instead of limits.conf).
> >
> >(All though I have an issue with installing a package like
> >libboost-dev, which takes minuts when booted a RT kernel and
> >seconds when using the generic kernel, Ubuntu and Debian, kernel
> >2.6.33.7-rt2. The Debian RT kernel has RT_GROUP_SCHED disabled
> >though...,
> >
> >http://www.spinics.net/lists/linux-audio-users/msg74100.html )
> >
> >\r
> BTW the kernel for Tango Studio has it also enable afaik
>
> grep -i RT_GROUP_SCHED /boot/config-2.6.32-25-lowlatency
> CONFIG_RT_GROUP_SCHED=y
>
> Lucid here. Does this whole story apply to Ubuntu 10.04 also?

as long as no cgroups are used, this is not a problem.
but when processes get moved outside of the root cgroup, its very
unlikely, that these cgroups have rt bandwidth assigned to them

>
> \r
> _______________________________________________
> Linux-audio-user mailing list
> Linux-audio-user@email-addr-hidden
> http://lists.linuxaudio.org/listinfo/linux-audio-user

-- 
torben Hohn
_______________________________________________
Linux-audio-user mailing list
Linux-audio-user@email-addr-hidden
http://lists.linuxaudio.org/listinfo/linux-audio-user