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Date:      Tue, 5 Jun 2012 16:01:04 +0000
From:      "Pieper, Jeffrey E" <jeffrey.e.pieper@intel.com>
To:        Adrian Chadd <adrian@freebsd.org>, "Bjoern A. Zeeb" <bzeeb-lists@lists.zabbadoz.net>
Cc:        Jack F Vogel <jfv@freebsd.org>, FreeBSD Networking Mailing List <freebsd-net@freebsd.org>
Subject:   RE: ixgbe(4) intr and pps problems in at least HEAD
Message-ID:  <2A35EA60C3C77D438915767F458D6568481B1E3C@ORSMSX101.amr.corp.intel.com>
In-Reply-To: <CAJ-Vmon_HSwfR9PkrEq7MtWuXERAFp=ZJu_vtHjk8Sshsg2Uhw@mail.gmail.com>
References:  <90B0A065-634A-47F5-A8B9-3D093865F48A@lists.zabbadoz.net> <CAJ-Vmon_HSwfR9PkrEq7MtWuXERAFp=ZJu_vtHjk8Sshsg2Uhw@mail.gmail.com>

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-----Original Message-----
From: owner-freebsd-net@freebsd.org [mailto:owner-freebsd-net@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@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 =3D 0. Doing th=
is doesn't seem to affect performance in any way that I've found, and it ge=
ts rid of the annoying spam :)

Jeff
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