Interrupt Descriptions

[Jack Vogel]

Good job John, will make my test department very happy :)
Once this is in CURRENT I will make changes to the ixgbe driver
to use it also.

Jack


On Wed, Sep 30, 2009 at 2:32 PM, John Baldwin <jhb at freebsd.org> wrote:

> 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<http://www.FreeBSD.org/%7Ejhb/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
>
> --
> John Baldwin
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