Hi Tim --

Pd~ is still a moving target (it's one of the things I want to work on now that the GUI swap is stable).

The current implementation has a limited buffer going back and forth between the processes and so it's easy for either the "parent" or "child" Pd to deadlock waiting on data from the other one. The buffers are maintained in pipes and in Linux I think they're 8Kb.

If you can reduce the volume of information flowing between the two Pd~s this sometimes helps greatly. Also, paradoxically, sometimes it helps to reduce the buffering -- in linux I usually use -fifo 10.

cheers Miller

On Fri, Apr 22, 2011 at 03:58:21PM +0200, tim vets wrote:

Hi all,

I'm trying out pd~ for spreading workload over multiple processors, and thus increase performance.

but if I load my [subproctest] as an abstraction, it doesn't cause clicks, while with:

[pd~ start subproctest.pd( | [pd~ -ninsig 8 -noutsig 8 -fifo 20]

...clicks galore...

(pd-extended 0.42.5, ubuntustudio Hardy, qjackctl, RME hdsp, intel core i7 processor)

any tips? thanks, Tim

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