Hi Paul, At Thu, 07 Aug 2003 09:22:57 -0400, Paul Davis wrote: > > >Do you get lockups if you use snd-dummy as the lowlevel driver? How about > >without ardour (just jackd and some example clients running)? > > i'll have to try snd-dummy. and yes, it will happen with just jackd > alone.
did you check this already? > however, it will not happen unless jackd is run with SCHED_FIFO. my > system has been running for several days now with jackd there the > whole time. with SCHED_FIFO, i can't get more than about 10-15 > minutes, or so it seemed. > > the worrying thing here is that the problem may go back further in > time, because until qjackctl came along, my default was to run without > SCHED_FIFO, whereas with it the "default" is with SCHED_FIFO. this > means that SCHED_FIFO operation may not have been tested well enough > for quite a while (on my system, i mean). i do know that in further > back (months), i've run jackd+ardour with SCHED_FIFO for hours without > problems on this system. i became now a bit skeptical whether this is really related with the new stream-linking codes, since this happens only with SCHED_FIFO. in theory, the dead stream-link locks can happen at the XRUN status, which may happen more often with SCHED_OTHERS. anyway, the attached is a patch to clean up a bit the complicated spin-lock paths. this invokes always unlock -> lock instead of spin_trylock for simplicity. please give a try. Takashi
spin-cleanup.dif
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