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Date:      Mon, 14 May 2012 15:43:38 -0600
From:      "Kirk Davis" <kirk.davis@epsb.ca>
To:        "Jack Vogel" <jfvogel@gmail.com>
Cc:        freebsd-net@freebsd.org
Subject:   RE: 10Gb/s ixgbe and mbuf performance tuning.
Message-ID:  <529374128DC1B04D9D037911B8E8F0531095BEFE@Exchange26.EDU.epsb.ca>
In-Reply-To: <CAFOYbc=NsEy1-eT_XUvhrF7RQvkVbW0SDfHnh7bpCxKib96oWw@mail.gmail.com>
References:  <529374128DC1B04D9D037911B8E8F0531095BEF8@Exchange26.EDU.epsb.ca> <CAFOYbc=NsEy1-eT_XUvhrF7RQvkVbW0SDfHnh7bpCxKib96oWw@mail.gmail.com>

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On Mon, May 14, 2012 at 2:02 PM, Jack Vogel [mailto:jfvogel@gmail.com]
wrote:

=20

>Do you have LRO enabled? Also, you say it stops routing, do you mean it
>passes non-routing traffic, or does everything stop?

I do have LRO enabled on both of the interfaces.  It stops accepting
traffic. It doesn't router traffic and I can't ssh into the server.  If
I try to ping a host on the local network from the console, I get an
"Out of Buffer Space" error (not sure of the exact wording).


>Jack
>

>On Mon, May 14, 2012 at 9:49 AM, Kirk Davis <kirk.davis@epsb.ca> wrote:

>Hi,
>
>              I am running FreeBSD 8.1p3 amd64 with 6Gb of RAM. This
>is a router using Quagga for BGP.  It has two 10Gb/s network
connections
>using the intel ixgbe 2.4.4 driver.  It is handling routing for about
>200 remote sites and about 300k simultaneous sessions through the box.
>After a few hours at high traffic volumes (just over a 1Gb/s) it will
>stop routing any traffic.  It look like I am running out of mbuf's.  I
>have increased them but I am worried that there is a limit as to how
>much I can increase them without starving the kernel of space.  Console
>is still responsive but no network.



>               I have looked over Tuning(7) and some other great
>articles on the net on performance tuning FreeBSD but it has left me a
>little confused.  Can someone help to explain the best way to
>troubleshoot this issue and any formulas to tune it.

--- Kirk

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=20




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