[PD] Linux performance issues

[carmen]

On Tue Sep 26, 2006 at 09:57:29PM +0200, Kristofer Hagbard wrote:
> 
> I have a similar (the same?) problem with pd 0.39-2 in xubuntu. When
> I move windows I get alot of audio dropouts (even in very simple
> patches). I don't get any xruns and the cpu load is ok. What I do get
> is alot of DIO errors. The audio works fine when i run GEM in fullscreen.

does upgrading your kernel to to 2.6.18 (optionally -rtN) help?

> 
> .kristofer
> 
> 
> c.m.bryan wrote:
> > Hello all,
> >
> > I've been using pd on a fedora/CCRMA system for a couple of years with
> > good results.  Recently I decided to switch to Ubuntu for several
> > reasons, and was aware that the latency wouldn't be as good as ccrma,
> > but I thought it would be plenty sufficient for my needs.
> >
> > However, after following the instructions on the ubuntu-studio page,
> > pd still clicks and pops frequently, i.e. when moving windows or
> > recording data or saving the patch.  Increasing the frames/period in
> > Jack helps a little, but not much... even at 512 or 1024!  And no
> > other settings seem to help (Realtime is enabled, and pd is launched
> > with -rt).
> >
> > Next I tried compiling a vanilla kernel with Molnar's patch as
> > described on the ubuntu-studio page, everything works fine in that
> > kernel, except no better performance from pd :(
> >
> > This is the same machine as it was on ccrma, so it must be a software
> > issue... any ideas??
> >
> > A screenshot of qjackctl:
> > cmbryan.com/Screenshot.png
> >
> > Thanks!
> >
> > Chris
> >
> >
> >
> 
> 
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