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Date: Mon, 24 Oct 2011 16:32:48 -0400
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From: Ryan Stone <rysto32@gmail.com>
To: Sergey Saley <sergeysaley@gmail.com>
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Cc: freebsd-net@freebsd.org
Subject: Re: Too much interrupts on ixgbe
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On Mon, Oct 24, 2011 at 3:51 PM, Sergey Saley <sergeysaley@gmail.com> wrote:
> MPD5, netgraph, pppoe.Types of traffic - any (customer traffic).
> Bying this card I counted on a 3-4G traffic at 3-4K pppoe sessions.
> It turned to 600-700Mbit/s, about 50K pps at 700-800 pppoe sessions.

PPPoE is your problem.  The Intel cards can't load-balance PPPoE
traffic, so everything goes to one queue.  It may be possible to write
a netgraph module to load-balance the traffic across your CPUs.