On Apr 3, 2010, at 2:39 AM, tim vets wrote:

Hi all,
I have a rather heavy patch which causes DIO errors when I switch~ on several subpatches.
I'm running pd + Jack on a rt kernel (ubuntu-studio Hardy),... Jack shows little or no Xruns.
Now I wanted to try and optimize the patch by using [pd~].

The way I understood it is that [pd~] will start a subprocess and it will (automatically ?) divide the audio computation load over multiple processors.
However, I get the impression that by using [pd~] I get the same (or even worse) results as with my regular "abstraction / [switch~]" approach; DIO error crackles.

Any advice very welcome!

Have you had clicks before? In my experience running Linux, I have had much fewer dio errors (basically none) running pd -rt on a *non* realtime kernel. I use the basic Ubuntu kernel with realtime privileges enabled, no running pd as root. I also do not use jack but alsa directly, which seems more stable.