[PD] Linux performance issues

[Kristofer Hagbard]

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.

.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
>
>
>