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Re: [Xen-devel] radeon in dom0/ivtv in domU: irq 16 nobody cared

Hi,


Anyhow, what I would like you test is to provide 'noirqdebug' flag on
your Linux kernel command line. That should take care of the 'nobody
cared IRQ'. Please test and see if you your machine is more or less
sluggish.
Ok, i just rebooted my system with this setting, Will start some recordings,
and see how it behaves.

Also, please do run this:
while (true)
do
sleep 10
cat /proc/interrupts | grep 16
done

during the lifecycle of the whole machine. I am curious to see whether
you also get an IRQ storm (or if it is just a trickle - which is OK)
after launching the DomU guest.
I put a monitor in place, we'll see what happens. As far as i can see now,
the radeon driver registers the IRQ, but doesn't seem to do much with it
during normal use (counter is still 0 after about 15 minutes running X now). Perhaps it is meant for opengl or some accelerated function, or my xserver
is just not using the drivers full potential.
Which makes it all the easier to see a storm should it occur ;-)

Regards,
Mark.


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