> -----Original Message-----
> From: Richardson, Bruce <bruce.richard...@intel.com>
> Sent: Thursday, January 13, 2022 11:06 PM
> To: Yasuhiro Ohara <y...@nttv6.jp>
> Cc: dev@dpdk.org; Xing, Beilei <beilei.x...@intel.com>
> Subject: Re: ETH_RSS_IP only does not seem to balance traffic
>
> On Thu, Jan 13, 2022 at 12:52:04AM +0900, Yasuhiro Ohara wrote:
> >
> > Hi,
> >
> > My system developper friend recently ran into a problem where l3fwd
> > does not appear to receive balanced traffic on Intel XL710, but it is
> > resolved when the attached patch is applied.
> >
> > - .rss_hf = ETH_RSS_IP,
> > + .rss_hf = ETH_RSS_IP | ETH_RSS_TCP | ETH_RSS_UDP,
> >
> > IIRC I ran into a similar problem 3 or 4 years back, but didn't report
> > then because I believed I was doing something silly.
> > But since my friend is an experienced engineer, I feel like it may be
> > better (for the community) to ask this in the list.
> >
> > We are using dpdk-stable-18.11.6 and igb_uio.
> >
> > What are we doing wrong?
> >
> > If it is not a FAQ, I can test it again with more recent stable, and
> > will report the details.
> >
> For XL710 NICs, I believe that ETH_RSS_IP load balances only IP frames that do
> not have TCP or UDP headers also. Adding i40e driver maintainer on CC to
> comment further.
Yes, Bruce is right. For XL710, ETH_RSS_IP doesn't cover TCP and UDP packets.
>
> /Bruce
