Re: [Intel-wired-lan] [PATCH net-next RESENT v3] ethtool: ice: Support for RSS settings to GTP from ethtool

takeru hayasaka
2024-01-31T03:15:53Z

Hi Harald-san

I apologize for the delay in making further progress on this
patch.(I'm three months late...

> There are many different GTPv2C messages

Thank you for your assistance in explaining GTPC:)

Thanks,
Takeru

2024年1月30日(火) 19:15 Harald Welte <laforge@gnumonks.org>:
>
> hi Marcin,
>
> Disclaimer: I have no understanding of the proposed implementation here, just commenting
> on this from a 3GPP protocol architecture point of view.
>
> On Tue, Jan 30, 2024 at 10:59:40AM +0100, Marcin Szycik wrote:
> > >> gtpc(4|6) doesn't include TEID, so what is its purpose?
> > > In GTPC communication, there is no TEID in the CSR (Create Session Request).
> > > Therefore, there are cases of GTPC that do not include TEID.
> >
> > The way I understand it now, this patch (and the ethtool one) adds hashing on
> > TEID field in GTP* headers. So I wanted to ask why do we have a case (gtpc(4|6))
> > that doesn't include TEID? Do we hash on other fields in this header?
>
> There are many differen GTPv2C messages, most of which contain a TEID. So it does
> in general still make sense to be able to use RSS for all those other messages.
>
> The CSR (Create Session Request) will not be able to benfit from it, but
> it's just the first message initiating a dialogue between two elements
> (think of it like a TCP SYN). All the follow-up messages in that
> dialogue contain TEIDs and hence can benefit from RSS.
>
> --
> - Harald Welte <laforge@gnumonks.org> https://laforge.gnumonks.org/
> ============================================================================
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