ixgbe(4) intr and pps problems in at least HEAD

[Pieper, Jeffrey E]

-----Original Message-----
From: owner-freebsd-net at freebsd.org [mailto:owner-freebsd-net at freebsd.org] On Behalf Of Adrian Chadd
Sent: Sunday, June 03, 2012 11:12 AM
To: Bjoern A. Zeeb
Cc: Jack F Vogel; FreeBSD Networking Mailing List
Subject: Re: ixgbe(4) intr and pps problems in at least HEAD

On 3 June 2012 10:05, Bjoern A. Zeeb <bzeeb-lists at lists.zabbadoz.net> wrote:
> Hey Jack or anyone on net@,
>
> having updated my sources of HEAD from Dec/Mar to something of last week
> I get a lot of:
>
> interrupt storm detected on "irq262:"; throttling interrupt source
>
> That to me almost sounds like no interrupt mitigation or just an
> unserviced isr bit.
>
> Can you go grovelling through the interrupt handler and see what bits
> are/aren't being handled?
>
>
> Adrian

The README should probably be updated. I noticed this awhile back, and Jack said just to disable it by setting hw.intr_storm_threshold = 0. Doing this doesn't seem to affect performance in any way that I've found, and it gets rid of the annoying spam :)

Jeff
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