xdp-newbies.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: "Björn Töpel" <bjorn.topel@gmail.com>
To: "Toke Høiland-Jørgensen" <toke@redhat.com>
Cc: "Gaul, Maximilian" <maximilian.gaul@hm.edu>,
	Xdp <xdp-newbies@vger.kernel.org>
Subject: Re: Shared Umem between processes
Date: Thu, 12 Mar 2020 12:29:12 +0100	[thread overview]
Message-ID: <CAJ+HfNgRahagXKiiUCwZMO46cPL--OxXcE3HwpbWAyph9Cjy3Q@mail.gmail.com> (raw)
In-Reply-To: <87sgidon13.fsf@toke.dk>

On Thu, 12 Mar 2020 at 12:01, Toke Høiland-Jørgensen <toke@redhat.com> wrote:
>
> Björn Töpel <bjorn.topel@gmail.com> writes:
>
> > On Thu, 12 Mar 2020 at 10:17, Gaul, Maximilian <maximilian.gaul@hm.edu> wrote:
> >>
> > [...]
> >>
> >> Thank you so much Björn!
> >>
> >> just to wrap things up:
> >>
> >> - if I want to distribute packet processing from a single RX-Queue to
> >> multiple sockets I have to use shared umem because it is not possible
> >> to bind multiple af-xdp sockets onto the same RX-Queue
> >
> > Correct! And you need a tailored XDP program that spreads over the
> > shared umem sockets!
>
> Could we lift this restriction? Not with zero-copy, obviously, but if
> there's a copy involved it seems it should be possible to support
> several sockets on the same RXQ? That would make it possible to use XDP
> as a per-CPU load balancer for a single RXQ, like we can do with cpumap
> for packets hitting the stack today?
>

Yes! It's on the (never ending) TODO list. Never heard that before, right? :-(


Cheers,
Björn

> -Toke
>

  reply	other threads:[~2020-03-12 11:29 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <fd5e40efd5c1426cb4a5942682407ea2@hm.edu>
2020-03-12  7:55 ` Shared Umem between processes Björn Töpel
2020-03-12  8:20   ` AW: " Gaul, Maximilian
2020-03-12  8:38     ` Björn Töpel
2020-03-12  8:49       ` AW: " Gaul, Maximilian
2020-03-12  9:10         ` Björn Töpel
2020-03-12  9:17           ` AW: " Gaul, Maximilian
2020-03-12  9:40             ` Björn Töpel
2020-03-12 11:00               ` Toke Høiland-Jørgensen
2020-03-12 11:29                 ` Björn Töpel [this message]
2020-03-12 15:48                   ` AW: " Gaul, Maximilian
2020-03-15 15:29                     ` Gaul, Maximilian

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=CAJ+HfNgRahagXKiiUCwZMO46cPL--OxXcE3HwpbWAyph9Cjy3Q@mail.gmail.com \
    --to=bjorn.topel@gmail.com \
    --cc=maximilian.gaul@hm.edu \
    --cc=toke@redhat.com \
    --cc=xdp-newbies@vger.kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).