From: Jamal Hadi Salim <jhs@mojatatu.com>
To: Jesper Dangaard Brouer <brouer@redhat.com>
Cc: john Fastabend <john.r.fastabend@intel.com>,
Herbert Xu <herbert@gondor.apana.org.au>,
"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
eric Dumazet <edumazet@google.com>
Subject: qdisc running
Date: Sun, 19 Oct 2014 15:24:42 -0400 [thread overview]
Message-ID: <54440FFA.40307@mojatatu.com> (raw)
Jesper,
You asked at the meeting the point to qdisc running.
Original intent is to allow only one cpu to enter the lower half of the
qdisc path. IOW, if one cpu was already in the qdisc then that guy
could be used to dequeue packets. i.e this is good for batching.
Original idea was Herbert's with major improvement from Eric
and a small one from me.
For history of different tried approaches look at:
Look at slide 2:
http://vger.kernel.org/netconf2011_slides/jamal_netconf2011.pdf
then download the **amazing** flash animations which describe
that history.
http://vger.kernel.org/netconf2011_slides/netconf-2011-flash.tgz
Follow the bullets in slide2 and map to the flash animations.
If you go over them, you'll see it is still needed.
I think someone oughta put those **amazing** animations on some
website;->
cheers,
jamal
next reply other threads:[~2014-10-19 19:24 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-19 19:24 Jamal Hadi Salim [this message]
2014-10-20 16:17 ` qdisc running Jesper Dangaard Brouer
2014-10-20 22:17 ` Jamal Hadi Salim
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=54440FFA.40307@mojatatu.com \
--to=jhs@mojatatu.com \
--cc=brouer@redhat.com \
--cc=edumazet@google.com \
--cc=herbert@gondor.apana.org.au \
--cc=john.r.fastabend@intel.com \
--cc=netdev@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).