On 09/15/2012 01:25 PM, peter@xxxxxxxxxxxxxx wrote:
did some observing...
when i put snd_hdsp in the RTIRQ_NAME_LIST in the rtirq config, neither
priorities nor IRQs change. however...
for ALL kernels under which jack fails:
/etc/init.d/rtirq status
shows irq/19-snd_hdsp AND irq/19-firewire
and for the one kernel under which jack works:
/etc/init.d/rtirq status
shows irq/19-snd_hdsp and a DIFFERENT irq for firewire
this seems significant.
and... how can i ensure firewire gets a different irq?
for now, i'll try killing the firewire module, since i don't use
anything
firewire at the moment.
cheers!
.pltk.
experiment results:
on a 3.5-3 kernel, after killing firewire modules, rtirq status is:
PID CLS RTPRIO NI PRI %CPU STAT COMMAND
45 FF 90 - 130 0.0 S irq/8-rtc0
757 FF 85 - 125 0.0 S irq/19-snd_hdsp
767 FF 80 - 120 0.0 S irq/44-snd_hda_
235 FF 75 - 115 0.0 S irq/16-ehci_hcd
236 FF 74 - 114 0.0 S irq/23-ehci_hcd
44 FF 70 - 110 0.0 S irq/1-i8042
43 FF 69 - 109 0.1 S irq/12-i8042
32 FF 50 - 90 0.0 S irq/9-acpi
233 FF 50 - 90 0.0 S irq/16-mmc0
239 FF 50 - 90 0.8 S irq/41-ahci
641 FF 50 - 90 0.0 S irq/42-mei
708 FF 50 - 90 0.0 S irq/17-rtlwifi
716 FF 50 - 90 0.0 S irq/43-i915
2371 FF 50 - 90 0.0 S irq/40-eth0
3 TS - 0 19 0.2 S ksoftirqd/0
15 TS - 0 19 0.1 S ksoftirqd/1
19 TS - 0 19 0.1 S ksoftirqd/2
23 TS - 0 19 0.1 S ksoftirqd/3
...and after my script which kills other unneeded things:
PID CLS RTPRIO NI PRI %CPU STAT COMMAND
45 FF 90 - 130 0.0 S irq/8-rtc0
757 FF 85 - 125 0.0 S irq/19-snd_hdsp
235 FF 75 - 115 0.0 S irq/16-ehci_hcd
236 FF 74 - 114 0.0 S irq/23-ehci_hcd
44 FF 70 - 110 0.0 S irq/1-i8042
43 FF 69 - 109 0.1 S irq/12-i8042
32 FF 50 - 90 0.0 S irq/9-acpi
233 FF 50 - 90 0.0 S irq/16-mmc0
239 FF 50 - 90 0.5 S irq/41-ahci
641 FF 50 - 90 0.0 S irq/42-mei
716 FF 50 - 90 0.0 S irq/43-i915
2371 FF 50 - 90 0.0 S irq/40-eth0
3 TS - 0 19 0.1 S ksoftirqd/0
15 TS - 0 19 0.1 S ksoftirqd/1
19 TS - 0 19 0.1 S ksoftirqd/2
23 TS - 0 19 0.0 R ksoftirqd/3
...then, jack still fails. same story for the 3.2.0 kernel.
so, avoiding the irq conflict by unloading firewire modules doesn't solve
the problem. mrph.
Argh, that seemed like a good lead...
What does "cat /proc/interrupts" show? I think the interrupt count for
each cpu should increment. Does it?
Sorry, don't quite know where to go from here, looks like something for
kernel gurus in lkml...
-- Fernando
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