Re: [dpdk-dev] buf->hash.rss always empty with i40e

["Wu, Jingjing" <jingjing.wu@intel.com>]

> -----Original Message-----
> From: tom.barbette@ulg.ac.be [mailto:tom.barbette@ulg.ac.be]
> Sent: Monday, February 6, 2017 11:08 PM
> To: Ananyev, Konstantin <konstantin.ananyev@intel.com>
> Cc: Richardson, Bruce <bruce.richardson@intel.com>; dev@dpdk.org; Zhang,
> Helin <helin.zhang@intel.com>; Wu, Jingjing <jingjing.wu@intel.com>
> Subject: Re: buf->hash.rss always empty with i40e
> 
> Hi Konstantin,
> 
> It seems a little overkill to play with the key... The XL710 seems to be able to
> hash on IP fields only. It seems only a configuration issue, I'm adding i40e
> maintainers in CC so they can confirm? I think the i40e driver should
> configure XL710 to hash on IP fields for TCP and UDP when only ETH_RSS_IP
> is given instead of hashing to 0. That would mimic ixgbe behaviour btw.
> 
> Tom
> 
Yes, the behavior of XL710 is different from ixgbe on that.
If only enable ETH_RSS_IP, rss will not work on TCP and UDP packets. So you need
To set  ETH_RSS_IP | ETH_RSS_UDP |ETH_RSS_TCP

Thanks
Jingjing