There was an article a few months back in Linux Journal that described how to "lock" a thread onto a processor (and disallow any other threads form running on that processor). If you were to lock the JACK process into a single processor on an SMP box, wouldn't you effectively get very low latency without any kernel patching or anything? You'd have to use lock-free-fifo's to talk to the other processor (which is running the UI, etc) of course. And you'd use a polling model to read/ write data to the soundcard. Does ALSA have it's own thread in addition to the JACK thread, and would it have to be on the same processor? I'm not a Linux/Intel architecture guru, so forgive me if I've missed some obvious points. -Ben
