is RSS and Flow director can work together

[Balakrishnan K]

Hi Stephen,
Thank you!
Will there be any conflict occur between rss and the flow pattern that I am going to create.
RSS and flow rule having same criteria which one takes the priority

Regards,
Bala 



-----Original Message-----
From: Stephen Hemminger <stephen at networkplumber.org> 
Sent: Monday, March 11, 2024 9:16 PM
To: Balakrishnan K <Balakrishnan.K1 at tatacommunications.com>
Cc: dev at dpdk.org; users at dpdk.org
Subject: Re: is RSS and Flow director can work together

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On Mon, 11 Mar 2024 09:17:01 +0000
Balakrishnan K <Balakrishnan.K1 at tatacommunications.com> wrote:

> Hi All,
>     I want to use the dpdk application with RSS and flow director.
> is possible to use both at a time in application.
> In RSS, I am using
> action_rss_tcp.types = ETH_RSS_NONFRAG_IPV4_TCP | ETH_RSS_L3_SRC_ONLY 
> | ETH_RSS_L3_DST_ONLY; to receive the similar traffic to same core.
> One specific case where I wanted to distribute the traffic across 
> core, here the incoming traffic having same src and dst IP Example( src ip : 10.10.10.1 dst ip :20.20.20.2) .
> With RSS enabled all the traffic going to end up in one core ,where the remaining cores are being idle impacting the performance.
> Planning enable flow director and create rule to distribute the traffic for the combination src /dst ip (10.10.10.1 /20.20.20.2) along with RSS.
>
> if RSS and flow rule having same criteria which one takes the priority .
>
> Regards,
> Bala

You can do that with rte_flow action of rte_flow_action_rss.