[linux-audio-user] 2.6.15.4, realtime-lsm, jackd -R, system performance down!

[Sean Edwards]

Have you tried running jackd as root?  This would also
require you to run all your jack applications as root
as well.

--- Ismael Valladolid Torres <ivalladt at punkass.com>
wrote:

> I just compiled a vanilla kernel 2.6.15.4 in my G3
> powerpc. Also I
> compiled, installed and loaded the realtime-lsm
> module and I started
> to play with jackd -R and some jack enabled
> applications.
> 
> If I start jackd without realtime, everything runs
> nicely, of course
> with some xruns when I switch windows, manipulate
> GUIs and such. This
> is more or less what I expected.
> 
> But then I run jackd realtime using qjackctl. I
> start amsynth and it
> takes a bit longer to load but then runs without a
> mess. Sound is
> clean, no artifacts, no xruns.
> 
> Then I try horgand. It takes a lot for it to load,
> then it sounds
> nicely, I get no xruns, but my X Window system
> becomes unresponsive.
> 
> Later I try zynaddsubfx. It takes half an hour to
> open, and then it
> kills qjackctl, leaving the jack server running.
> Meanwhile top shows
> that zynaddsubfx is taking 35% of memory, and
> qjackctl and jackd 25%
> each.
> 
> Could this be an issue with the applications, with
> the kernel, with
> the realtime-lsm module, with priority of my X
> Window session?
> 
> I must insist this only happens when jackd is run
> with the -R option.
> 
> Is it true that realtime-lsm is deprecated? How do I
> enable realtime
> preemption on a 2.6.15?
> 
> Any ideas welcome.
> 
> Cordially, Ismael
> -- 
> Dropping science like when Galileo dropped his
> orange
> 
>      http://lamediahostia.blogspot.com/
>      http://www.flickr.com/photos/ivalladt/
> 
> 


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