28 Dec
2007
28 Dec
'07
11:46 a.m.
Am Freitag, 28. Dezember 2007 schrieb Jacob Lee:
I'm using an M-Audio Transit usb soundcard with
the kernel 2.6.22-rt,
as packaged by ubuntu. I'm running jack right now with -p 3 -n 512,
and I still get xruns, typically of values less than .03ms, every few
minutes.
You can try increasing the client timeout, i.e:
$ jackd -R -P60 -t200 ...
helps here using kernel 2.6.24-rcx.
((
jackd calls poll() with a timeout value of a period's ms each time
it triggers the external clients. Linux's poll() call can timeout at
(specified timeout - jiffy). IMHO either linux needs to be fixed to
implement posix poll() timeout handling, or jackd has to supply
(a period's ms + a jiffy's ms) as parameter for the poll() call.
))
Karsten