> (Remember, this is not the adapter on my motherboard, but just something I
> am plugging in for test purposes.)  When I'm running vanilla linux (3.5.7)
> with this configuration, everything seems to work fine (the ethernet card,
> the mouse/keyboard, and no spurious interrupts).  Under xenomai, the
> ethernet card works, but within a few seconds the mouse and keyboard become
> extremely delayed as I mentioned in a previous email.

Have you been able to look at dmesg output (or /var/log/message) after
the USB mouse and keyboard stop responding? This sounds very similar
to an issue we had where a real-time PCI device was sharing an
interrupt with one of the USB controllers.

As a workaround, is it an option to simply use a PCIe network card?
This will give you an MSI interrupt that won't conflict with any other
devices in your system. I recall seeing some concerns with using MSI
for real-time interrupts under Xenomai, but I believe it can be done
successfully on x86 if you observe a few precautions (maybe Jan Kiszka
can comment?). We've successfully used MSI for non-real time
interrupts (ethernet cards) on many of our platforms.

-Matt

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