Re: [LAU] xruns with m-audio fast track pro on fedora 8 ccrma ->kernel 2.6.22 , periods/buffer = 3 , proper rtirq setup, disable 2nd core

Fernando Lopez-Lezcano a écrit : Ok finally, i tried to disable the second core ( i have a dual core 2GHz) and things get really better this way, i can lauch more applications with 4,8ms latency and no xruns. I had already disabled cpuspeed but it looks like it was not enough. That points to a realtime kernel problem with (probably) timekeeping in two core processors (ie: "time of day" is not perfectly synchronized between the processors so that if jack migrates from one to another it appears as there has been too much delay and things don't work as intended). I have seen this happen in 2.6.23.x + rt14. What happens if you boot dual core with the "idle=poll" kernel parameter? (I assume this happens with 2.6.22.x). -- Fernando Looks like it solves the problem, even the 2.6.23.x (latest ccrma kernel) works well with this parameter. Thanks. Florent