Re: [Jack-Devel] ALSA PCM multi plugin and xruns

On Tue, Dec 11, 2012 at 08:35:51AM +1100, Geoff Beasley wrote:
> G'day John. For me and my 4 C-Ports, I had several UP machines running  
> for several years without x-runs @ 64/48k. SMP never could/can do that.  
> Run the SMP machine as UP and no problem. The early 3.0.x kernels could  
> run SMP on Jack2 without xruns, but only the first few versions. rtirq  
> would also make a huge difference in the 2.6xx  - mixed results with 3.x  
> kernels

Geoff, I seem to remember you were running the cards in a dedicated
system with no X, connected via netjack to a separate box running
the DAW software. Is that still the case?

I could never get the performance you described on a single computer
running everything. I'm almost 100% certain the UP system I mentioned
also suffers from these phantom xruns with pcm_multi (but haven't been
able to confirm that yet). It seems to be very dependent on system load,
kernel version and configuration.

John

1355177777.21392_0.ltw:2, <20121210222612.GA3201 at localhost0 dot localdomain>