On Wed, 6 Mar 2024 07:28:40 +0000
Balakrishnan K <[email protected]> wrote:
> Hello,
> Our application needs symmetric hashing to handle the reverse traffic on
> the same core, also to
> Improve performance by distributing the traffic across core.
> Tried using rss config as below .
> action_rss_tcp.types = ETH_RSS_NONFRAG_IPV4_TCP | ETH_RSS_L3_SRC_ONLY|
> ETH_RSS_L3_DST_ONLY | ETH_RSS_L4_SRC_ONLY | ETH_RSS_L4_DST_ONLY;
> but could not get desired result.
> Is there any options or API available to enable symmetric RSS hashing .
> We are using dpdk 20.11 and intel NIC X710 10GbE .
>
> Regards,
> Bala
With XL710 there are two choices:
1. Set RSS hash function to RTE_ETH_HASH_SYMMETRIC_TOEPLITZ in
the rte_eth_rss_conf passed in during configure
2. Use default (non symmetric TOEPLITZ) but pass in a rss_key that
has duplicated bits in the right place. Like:
0x6d5a 0x6d5a 0x6d5a 0x6d5a
0x6d5a 0x6d5a 0x6d5a 0x6d5a
0x6d5a 0x6d5a 0x6d5a 0x6d5a
0x6d5a 0x6d5a 0x6d5a 0x6d5a
0x6d5a 0x6d5a 0x6d5a 0x6d5a
https://www.ndsl.kaist.edu/~kyoungsoo/papers/TR-symRSS.pdf
