Re: [patch] ixg(4): Intel 82599 10-gigabit ethernet

[David Laight <david%l8s.co.uk@localhost>]

On Tue, Aug 09, 2011 at 06:58:26PM -0500, David Young wrote:
> 
> If I don't bind iperf(1) to one CPU, then lock contention on my 2-CPU
> test boxes gobbles up a lot of time and TCP transmission performance
> plummets.  Our network stack doesn't do SMP well. :-/

Lock contention or massive amounts of cache-snooping (etc) because
the process keeps on being scheduled on the 'other' cpu.

        David

-- 
David Laight: david%l8s.co.uk@localhost