Hi all,
I've made minimalist example app on how to set symmetric RSS support for
X710 that uses RTE_FLOW rules - check it out here:
https://github.com/lukashino/i40e-symmetric-rss-rte-flow
Lukas
On 08. 03. 24 6:53, Balakrishnan K wrote:
Hi Stephen,
Thanks for the response . I will below option and come back if any help
required.
Regards,
Bala
-----Original Message-----
From: Stephen Hemminger <[email protected]>
Sent: Wednesday, March 6, 2024 8:34 PM
To: Balakrishnan K <[email protected]>
Cc: [email protected]
Subject: Re: Symmetric RSS Hashing support in DPDK
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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
