okay, it is good you're running a newish kernel (2.6.37)
Please make sure to just allow the driver to load with driver defaults (no module options)
ip ad ad <address/maskbits> dev ethM
ip link set ethM up
then run the (included in ixgbe-3.2.10.tar.gz) set_irq_affinity.sh ethM ethN ethO ethP script
run your test
this will spread all interrupts from each port across all cores. It is probably better to limit the cores in use to the ones directly connected to the I/O controller that is only one hop from your processors, but that is difficult to do currently.
If you want to try the second suggestion, reload the driver like so
modprobe ixgbe FdirMode=0,0,0,0 RSS=12,12,12,12
sorry could u please a basic and interface setting method??
im not and advanced user as im has been first time face this..