[xdp-hints] Re: XDP-hints presentation at LLC2022

["Bezdeka, Florian" <florian.bezdeka@siemens.com>]

Hi all,

On Mon, 2022-05-16 at 16:41 +0200, Alexander Lobakin wrote:
> From: Jesper Dangaard Brouer <jbrouer@redhat.com>
> Date: Mon, 16 May 2022 15:58:06 +0200
> 
> > Hi XDP-hints community,
> 
> Hey!
> 
> > 
> > Gave this talk[1] on Friday (13 May) "XDP hints via BPF" at Lund Linux
> > Con.  In the talk we are proposing several *possible* solutions, with
> > "pros" and "cons".  We are open to new ideas, proposals and critique.
> > 
> > I will play with implementing some of these ideas and to see if they
> > pan-out.  I want to acknowledge that Alexander Lobakin (+ co-authors)
> > also have started coding on solutions here[3].  Lets see if we can
> > collaborate and find a solution we can all agree on.
> 
> Nice catch about "it makes it possible to make NIC driver L2
> only" -- it's not present in the current code, but we're thinking
> of this for some time already :)
> Re collaborate -- I'm expecting the first RFC to hit internal review
> in 2-3 weeks, hope it will get posted to LKML soon after that. GH
> tree should be finalized this week, so you could start playing.

Is there something already available that would allow us to start
playing with xdp hints?

The main focus for us would be forwarding meta information like TX/RX
hardware timestamps from/into the AF_XDP application. The slides
mention that already, so it seems to be "in scope".

In addition I would like to learn which drivers you are primarily
targeting. Especially if drivers for Intel i210 (igb) and i225 (igc)
cards are on your radar.

Best regards,
Florian

> 
> > 
> > --Jesper
> > 
> > 
> > [1] Slide PDF: 
> > https://github.com/xdp-project/xdp-project/blob/master/conference/LLC2022/xdp_hints_hw_metadata-final.pdf
> > 
> > [2] Slide source: 
> > https://github.com/xdp-project/xdp-project/tree/master/conference/LLC2022
> > 
> > [3] https://github.com/alobakin/linux/commits/xdp_hints
> 
> Thanks,
> Al