Too much interrupts on ixgbe

[Ryan Stone]

On Mon, Oct 24, 2011 at 3:51 PM, Sergey Saley <sergeysaley at 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.