Interrupt Descriptions
Andriy Gapon
avg at icyb.net.ua
Thu Oct 1 13:07:58 UTC 2009
on 01/10/2009 00:32 John Baldwin said the following:
> A few folks have asked recently for the ability to add descriptive strings to
> registered interrupt handlers. This is especially true since the advent of
> MSI with multiple interrupts per device. I hacked up a prototype today that
> adds a new 'bus_describe_intr()' that takes the IRQ resource, the void *
> cookie returned by bus_setup_intr() and var args description and appends that
> to the interrupt name in the thread and vmstat -i info. The current patch
> only has the MI bits and the MD bits for amd64 as well as a sample change to
> the igb(4) driver.
>
> The patch is at http://www.FreeBSD.org/~jhb/patches/intr_describe.patch.
>
> An example from this patch is:
>
>> vmstat -i
> interrupt total rate
> irq1: atkbd0 8 0
> irq4: uart0 751 5
> irq6: fdc0 6 0
> irq14: ata0 36 0
> irq20: uhci0 20 0
> irq23: uhci3 ehci0 2 0
> irq28: mpt0 1661 11
> irq256: igb0:tx 0 880 6
> irq257: igb0:rx 0 1098 7
> irq258: igb0:link 3 0
> irq259: igb1:tx 0 1 0
> irq260: igb1:rx 0 134 0
> irq261: igb1:link 3 0
>
Example above doesn't demonstrate what happens when there are shared interrupts.
Would it still look nice (with sufficiently long descriptions)?
--
Andriy Gapon
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