Re: Interrupt storms with wm(4)

[Joerg Sonnenberger <joerg%bec.de@localhost>]

On Fri, Oct 15, 2021 at 02:10:32AM +0000, Emmanuel Dreyfus wrote:
> The wm0 interface gets a lot of interrupts. On low usage, CPU
> is spent around 10% in interrupts. It can rise to more than 80%.
> See below what systat vm says when the machine is quiet. 
> ioapic0 pin 16 is the wm0 interface.

Is it the only device using that pin? If so, can you add an event
counter or so to wm_intr to check what percentage of calls to wm_intr
return handled == 0?

Joerg