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

Stephen Hemminger stephen at networkplumber.org
Thu Mar 9 03:18:56 CET 2017

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.

More information about the users mailing list