Performance problem using Intel X520-DA2

[Nikolay Denev]

On Jan 25, 2012, at 1:59 PM, Ivan Voras wrote:

> On 24/01/2012 17:53, Marcin Markowski wrote:
>> On 24.01.2012 14:22, Ivan Voras wrote:
>>>> On Mon, Jan 23, 2012 at 12:20 PM, Marcin
>>>> Markowski<mmarkowski at leon.pl>wrote:
>>> 
>>>>> (on 9.0 we can see also kernel thread named {ix0 que} using 100% CPU),
>>> 
>>>>> hw.ixgbe.num_queues=16
>>> 
>>> If there really are 16 hardware queues, shouldn't there be 16 kernel
>>> threads for queue processing?
>> 
>> There are 16 threads, but only one of them consumes 100% CPU and the others
>> do not use more than 5% CPU:
>> 
>> http://pastebin.com/BWDWh8kW
> 
> You need Jack to confirm it but this looks like a serious problem / bottleneck. It just shouldn't be like that (if the test is exactly the same).
> 

Is this by any chance non-IP traffic (or encapsulated in some way).
I remember similar thread : http://freebsd.1045724.n5.nabble.com/igb-ixgbe-RSS-RX-queues-for-non-IP-traffic-td4778961.html