[Musix-users] Do I run a low-latency and realtime kernel?

Mon Apr 9 19:34:21 CEST 2007

Like I said before, Marcos knows what he is doing!

-=cybersean3000=-

On Mon, 2007-04-09 at 13:40 +0200, Marcos Guglielmetti
wrote:

> El Lun 09 Abr 2007 17:45, Sean Edwards escribiÃ³:
>  | First of all, I must say Marcos has taken on a
large,
>  | daunting, yet
>  | valuable project with Music.  I have tried many
other
>  | Music/Sound
>  | production Distro's, and Musix is the only one
that
>  | really works.  I
>  | continue to be amazed at Marcos can do with his
>  | Distribution.
>  |
>  | If there are any ubuntu people on this list, you
may
>  | know that Ubuntu
>  | Studio is due for release this month:
>  | http://ubuntustudio.org/  I admit
>  | that I will try it, but then go back to using
Musix.
>  | Ubuntu Studio have
>  | decided to use Gnome for the project desktop
which
>  | will cause problems
>  | on my ancient hardware.  Again, Marcos' selection
of a
>  | lightweight
>  | desktop (iceWM + ROX Filer) proves he understands
the
>  | scope of the
>  | project and how to reach those goals.
>  |
>  | When researching information about Ubuntu Studio
and
>  | sound with Ubuntu,
>  | I came across some very useful documentation
>  | https://help.ubuntu.com/community/Sound.   The
Ubuntu
>  | Studio Preparation
>  | page has brief yet useful discussion about Kernel
>  | Preemption and XRUNS.
>  | In that discussion, there is a link to a document
on
>  | compiling a Kernel
>  | with Real Time Preemption:
>  |
https://help.ubuntu.com/community/HowToVanillaKernelWithRealtimePreemption
>  |.
>  |
>  |
>  | Since Musix is based on Knoppix which is based on
>  | Debian, and Ubuntu is
>  | based on Debian, the documentation above should
work.
>  | I have Debian
>  | Stable installed on a Mac G3 Blue and White, and
>  | hopefully I will have
>  | time to test the documentation.
>  |
>  | Please don't do kernel experimentation on a
system
>  | with important data!
>  |
>  | I hope this helps.
> 
> Yes it helps, and thanks for your words,  but I must
tell you that thae 
> Musix's kernels followed, in part, those Ubuntu
Studio's tutorials, so, the 
> work was done... but, sure, if the user is an
experiences one, he could buid 
> a new kernel
> 
> I suggest to Try the 2.6.16-multimedia kernel that
it's into Musix, 
> 
> Also, the 2.6-16-beyond4.1 it's a realtime kernel...
> 
> To try it, start jack and type into a konsole:
> 
> ps -C jackd -cmL
> 
> You must see something like this:
> 
> ps -C jackd -cmL
>   PID   LWP CLS PRI TTY          TIME CMD
> 11213     - -     - ?        00:00:00 jackd
>     - 11213 TS   19 -        00:00:00 -
>     - 11218 TS   20 -        00:00:00 -
>     - 11219 TS   24 -        00:00:00 -
>     - 11222 FF   90 -        00:00:00 -
>     - 11223 FF   80 -        00:00:00 -
> 
> 
> If there are no FF, it's not in realtime, also,
Musix 0.99 tells you if you 
> are not using a realtime kernel.
> 
> Julien: is realtime-lsm loaded?
> 
> Type into a konsole:
> lsmod | grep realtime
> 
> 
> ............
> 
> If you want more evidences:
> 
> marcos at musix099b16:~$ cat
/boot/config-2.6.17-2-multimedia-486 | grep -i 
> realtime
> CONFIG_SECURITY_REALTIME=m
> marcos at musix099b16:~$ cat
/boot/config-2.6.16-beyond4.1 | grep -i realtime
> CONFIG_SECURITY_REALTIME=m
> 
> ..............
> 
> Julien, what could be wrong with zynaddsubfx? or
does it happends with any 
> other apps?
> 
> 
> Regards,
> 
> 
> 
>  | -=cybersean3000=-
>  |
>  | On Mon, 2007-04-09 at 06:54 -0400, julien bodd
wrote:
>  | > I went through the linux-audio-users-request
mailing
>  |
>  | list and I saw
>  |
>  | > that a low-latency kernel is not the same with
a
>  |
>  | realtime kernel.
>  |
>  |
>  |
>  |
>  |
>  |
>  |
__________________________________________________________________________
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> 
> -- 
> Marcos Guglielmetti  
> * Director del desarrollo de Musix GNU+Linux, 100%
Software Libre
> * Colabora:
http://www.musix.org.ar/wiki/index.php/Musix1.0tasks
> * CD Download: (http://www.musix.org.ar/en/)
> * Videos, programas, etc.:
ftp://musix.ourproject.org/pub/musix/
> * Reporte de errores: 
>
https://www.musix.org.ar/wiki/index.php?title=Problemas-Bugs
> *IRC: #musix channel on freenode
> * http://autosus.wordpress.com/
> 
> Â«No te tomes en serio nada que no te haga reÃrÂ»
[un amigo de E. Galeano]
> ... tampoco sigas al pie de la letra ninguna de
estas frases...
> 
> _______________________________________________
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