Spencer, > > Rui said a while ago that he was getting a similar message, until > he tuned the IRQ priorities, but I've been googling around and I > can't figure out how to do it. I tried > chrt -f -p 90 'pidof "IRQ 0"' > as directed on some website, but it just returns > > execvp: No such file or directory > failed to execute pidof "IRQ 0" > When I said that I was assuming that you have Ingo Molnar's realtime-preempt patch, which applies to vanilla 2.6 kernels only (latest is 2.6.11-rc4). The patch is here: http://people.redhat.com/~mingo/reatime-preempt/ You can only do that IRQ tunning if you have this kernel configured with PREEMPT_RT=y (i.e. complete realtime-preemption enabled). Once you have this up and running, tune the IRQ threads (with chrt) like this example: timer: chrt -f -p 90 `pidof "IRQ 0"` rtc: chrt -f -p 80 `pidof "IRQ 8"` snd: chrt -f -p 70 `pidof "IRQ 5"` usb: chrt -f -p 60 `pidof "IRQ 10"` Please note you must check which IRQ numbers are the appropriate (cat /proc/interrupts); the above is just an example taken from my laptop, where the USB controller (ohci_hcd) is on IRQ 10 and the onboard sound is on IRQ 5. YMMV. Bye. -- rncbc aka Rui Nuno Capela rncbc@xxxxxxxxx
