[Ardour-Users] Ardour 3 - xruns and segfaults

[Jörn Nettingsmeier]

On 03/27/2013 02:11 PM, Christian Weikusat wrote:

> My setup:
> Debian wheezy
> M-Audio Audiophile 24/96
> jack2 (1.9.8~dfsg.4+20120529git007cdc37-5)
>
> Jack settings (qjackctl):
> realtime
> Frames/Second: 256
> 48 kHz
> Periods: 4
> (latency 21.3 ms)

just a shot in the dark: i'm surprised to see 4 buffers per period - 
does this setting really make sense with the m-audio card?

the only place where i've found period sizes < 3 useful so far were 
recalcitrant firewire devices.

my first suggestion would be to lower -n to 2 and increase -p to 1024. 
this will provide you with the same latency you are currently working 
with, but at much lower CPU overhead (fewer context switches).

fwiw, i've been using ardour3 in production since late 2011 (yeah, don't 
buy used cars from me), and while i did see a very slight increase in 
cpu load and some outliers with a few "bad" commits here and there, 
overall ardour has become much more responsive, and the new multi-core 
scalability has more than compensated for any additional cpu hunger. 
just to put things in perspective, and to let you know that very likely 
this issue can be resolved...

-- 
Jörn Nettingsmeier
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