[dpdk-users] RSS : All fragments to same Recv queue

[Shyam Shrivastav]

Thanks, multipath is taken care of by upstream router so that all fragments
of a packet are injected on same interface ...

On Thu, Mar 9, 2017 at 7:48 AM, Stephen Hemminger <
stephen at networkplumber.org> wrote:

> On Wed, 8 Mar 2017 21:20:57 +0530
> Shyam Shrivastav <shrivastav.shyam at gmail.com> wrote:
>
> > Hi
> >
> > We want to use RSS supported by intel 82599 NIC, with one lcore running
> on
> > each processor and handling one receive queue. All fragments of an ipv4
> > packet need to go to same receive queue and handled by same lcore for
> > lockless reassembly. Looks like Intel  82599 supports RSS IPv4 hashing
> > using just source and dest address fields and that should put all
> fragments
> > on same queue ( can be enabled by ETH_RSS_IPV4 in
> rte_eth_rss_conf->rs_hf).
> > Please let me know whether my understanding is correct.
> >
> > Thanks
> > Shyam
>
> Yes as long as you keep port numbers out of the RSS hash it should work,
> but you may have to deal with fragments arriving over different paths.
> There is nothing in IP architecture that prevents multi-pathing.
>