network-programmingintelcentos5nicnetwork-interface

Get Intel Network Interface Card Supported RSS Descriptor Queue Number

Is there a way to get the supported number of Receive-Side Scaling descriptor queues for a Intel Network Interface Card in Centos5 programmatically?

For example for I210 I want to get 4, for I350 I want to get 8.

I will use that value on modprobe.conf file to pass RSS parameter to igb module. For example: options igb RSS=4,8

I tried lspci -vvv and ethtool -i interface but none of them worked for me.

Solution

  • After some research, I found out it is enough to assign 0 to all RSS parameters of igb module. It automatically assigns minimum of cpu number or queue number. For example: options igb RSS=0,0

    From README file of igb driver:

    0 = Assign up to the lesser value of the number of CPUs or the number of queues