i210 bridging interface problem

Hi,

I am developer on Linux system.  I have develop network tunnel with bridging interface.  I found problem in throughput performance.  It looks like serial packet.  From bandwidth monitoring, i can see packet flow from eth0 to eth1 as serialize not pararell. It need traffic from eth0 down to lowest then eth1 raise the traffic forward.

How can i fix this problem? I have been looking in Interrupt Throttle Rate (ITR) from your guide in "Tuning Throughput Performance for Intel® Ethernet Adapters".  But it does not any effect.

Thank you,

suchot