On Sat, 3 Dec 2011, Chris Edwards wrote: > linux-3.0.9 mainline, with "threadirqs": > > IRQs: > 17 Firewire > 18 Radeon > 19 Gina24 > > IRQ 17 is definitely noisier now, with ~500,000 interrupts during 4 mins > uptime without JACK running, but no "nobody cared" errors observed. > > JACK/FFADO runs OK, ~3200 interrupts/s on IRQ 17 (--rate 96000 --period > 128 --nperiods 3). DSP load 30%. > > PROBLEM: Audio drop-outs and JACK XRUNs while playing back in Ardour. > These seem to coincide with extra bursts of interrupt activity on IRQ 17 > (4,000-10,000 per second, above the 3,200 baseline). Same problem observed > using mplayer with JACK playback. Ok, that tells us something. So there is something unhappy in your system about the way how the threaded irq handling works. Can you please provide the output of lspci -vvv and a full boot log (any 3.0/3.2 kernel you have handy)? Thanks, tglx -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
