Re: intel 82599 multi-port performance

On 09/26/2011 08:42 AM, J.Hwan.Kim wrote:

On 2011년 09월 26일 23:20, Chris Friesen wrote:

quoted

On 09/26/2011 04:26 AM, J.Hwan Kim wrote:

quoted

Hi, everyone

Now, I'm testing a network card including intel 82599.
In our experiment, with the driver modified with ixgbe and multi-port
enabled,

What do you mean by "modified with ixgbe and multi-port enabled"? You
shouldn't need to do anything special to use both ports.

quoted

rx performance of each port with 10Gbps of 64bytes frame is
a half than when only 1 port is used.

Sounds like a cpu limitation. What is your cpu usage? How are your
interrupts routed? Are you using multiple rx queues?

Our server is XEON 2.4GHz with 8 cores.
I'm using 4 RSS queues for each port and distributed it's interrupts to
different cores respectively.
I checked the CPU utilization with TOP, I guess ,it is not cpu imitation
problem.

99 times out of 10, by default top will show the average CPU utilization across all the "CPUs" of the system. So I will ask the pedantic question - Did you check per-CPU utilization or just overall?

rick jones