[linux-audio-user] unsteady seq24

[Florian Paul Schmidt]

On Thu, 10 Aug 2006 13:15:48 +0200
Florian Paul Schmidt <mista.tapas at gmx.net> wrote:

> On Thu, 10 Aug 2006 12:06:15 +0200
> Atte André Jensen <atte.jensen at gmail.com> wrote:
> 
> > Hi
> > 
> > I feel my seq24 is a bit untight. I thought it was due to my clock 
> > resolution was set to 250 hz (std ubuntu setting) so I grabbed a new
> > 
> > kernel, patched it with
> > http://people.redhat.com/mingo/realtime-preempt/  and switched clock
> > resolution to 1000 hz.
> > 
> > However the (slight) untightness is still there, so it must be
> > something  else. What should I look for?
> > 
> > I run xubuntu 6.06 and the problem is observed when seq24 drives 
> > hydrogen. It's worse when theres activity on the machine.
> 
> seq24's midi thread runs at a too low prio even in realtime mode.
> 
> change line 1007 of perform.cc to:
> 
>                 schp->sched_priority = 80;
> 
> 
> and line 1565, too
> 
> That helps on my box..

Ah and of course run seq24 with --priority

Also make sure your irq/jack priority setup is ok. Read for example,
this page:

http://tapas.affenbande.org/?page_id=40

Have fun,
Flo

-- 
Palimm Palimm!
http://tapas.affenbande.org