[dpdk-users] RSS RETA size of 0 on vmxnet3?

[Stephen Hemminger]

On Fri, 27 Jan 2017 14:53:22 -0500
Rob Zimmerman <rob at thezims.net> wrote:

> Happy Friday, everyone!
> 
> Testing within VMWARE and my device query is showing the following:
> 
> RSS Offload
>  - reta size: 0
>  - IPv4: yes
>     - TCP: yes
>     - UDP: no
>     - SCTP: no
>  - IPv6: yes
> ....
> 
> How exactly does RSS work with a table size of zero? Unless I'm completely
> misunderstanding how to use RSS, I thought the redirection table was
> instrumental to that process...
> 
> FWIW, I'm running the same code on a bare-metal box with Intel I350's
> (igb_pmd) and it's showing a RETA size of 128, so I don't think it's my
> code showing a junk value.
> 
> Thanks!
> Rob

If you are querying a KNI interface (ie through Linux), it just means
the KNI interface doesn't do the ethtool support that value.