[PD] low latency jack vs Alsa

[Malte Steiner]

I created a rather complex patch which gives me some troubles when I use 
Jack with low latency settings. No XRuns but DIO errors when I click or 
even hover over some tables. Just for fun I tried running it with Alsa 
with same buffer settings as Jack before and dont get any DIO erros at 
all while editing tables.
The system is PD-Extended under Archlinux (custom compiled but I cant 
remember if I had the same troubles as in the other thread. There was 
something GEM/video related and IOhannes helped me at LAC 2010 but not 
sure what it was) with custom low latency kernel and other software runs 
just fine with Jack. I would like to keep using Jack with PD under low 
latency conditions so which parameters I could tweak to get rid of DIO 
errors while using the gui? I tried changing realtime settings with chrt 
of the pd process, starting pd with and without -rt and -nosleep and so 
on.Tested with old and new, second generation Jack.

Cheers for any hints,

Malte


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