<div dir="ltr"><div><div><div>Hi Ede,<br><br><blockquote style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex" class="gmail_quote"> 20:  <CPU List> IR-IO-APIC   20-fasteoi   ohci_hcd:usb9, snd_rme9652, vfio-intx(0000:07:00.0)<br></blockquote><div> </div></div>Have you tried plugging the device into a different USB port? Sometimes this makes a difference for the USB interrupt.<br><br><blockquote style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex" class="gmail_quote">So some USB, my passed-through parallel card and my soundcard are all sharing interrupt #20.<br></blockquote><div> </div></div>Do you *use* the parrrallel port? If not, you can remove the kernel module with rmmod, and then the interrupt won't fire..<br><br></div><blockquote style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex" class="gmail_quote">And finally you could set the CPU affinity for each interrupt, so at least they're going to be handled by a different CPU than the one that's going to handle the audio interrupt.<br></blockquote><div><div><div><div><div><div><br>Some details about latency tuning, CPU affinities and tuning here:<br><a href="http://openavproductions.com/real-time-latency-tuning/">http://openavproductions.com/real-time-latency-tuning/</a><br></div></div></div></div></div></div><div class="gmail_extra"><br></div><div class="gmail_extra">Cheers, -Harry<br><br></div><div class="gmail_extra">-- <br><div class="gmail_signature"><br><a href="http://www.openavproductions.com" target="_blank">http://www.openavproductions.com</a></div>
</div></div>