is RSS and Flow director can work together

is RSS and Flow director can work together

[Balakrishnan K]

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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




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Re: is RSS and Flow director can work together

[Stephen Hemminger]

On Mon, 11 Mar 2024 09:17:01 +0000
Balakrishnan K <Balakrishnan.K1@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.

RE: 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@networkplumber.org> 
Sent: Monday, March 11, 2024 9:16 PM
To: Balakrishnan K <Balakrishnan.K1@tatacommunications.com>
Cc: dev@dpdk.org; users@dpdk.org
Subject: Re: is RSS and Flow director can work together

CAUTION: This email originated from outside of the organization. Do not click links or open attachments unless you recognize the sender and know the content is safe.

On Mon, 11 Mar 2024 09:17:01 +0000
Balakrishnan K <Balakrishnan.K1@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.