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Re: Performance problem using Intel X520-DA2 Marcin Markowski Thu Feb 02 19:07:52 2012

On 25.01.2012 14:18, Nikolay Denev wrote:
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<[EMAIL PROTECTED]>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

Most of the traffic received by the interface is a TCP/UDP, but there is also a PPPoE (~2.5Gbps/s).
The whole is divided into a large number of VLANs (>500)

--
Marcin Markowski

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