Luka Prin?i? / Nova deViator:

Renoise seems to be running some threads with FIFO scheduler with a
priority that is _below_ that of JACK and firewire driver (correct
right?), but ALSO some threads using Round Robin scheduler with VERY
HIGH RT priority of 95. my question is if this is a possible cause for
glitches and XRUNS?

This thread could be a watchdog thread, in which case a priority of 95

should be unproblematic.

The glitches and XRUNS you see are probably due to other reasons

than thread priorities. Renoise is probably doing some time consuming things

in the jack thread, or is the victim of priority inversion, or waiting for

a non-realtime thread doing some work.