ksummit.lists.linux.dev archive mirror
 help / color / mirror / Atom feed
From: Pavel Begunkov <asml.silence@gmail.com>
To: ksummit@lists.linux.dev
Subject: [TECH TOPIC] io_uring: BPF controlled I/O
Date: Fri, 25 Jun 2021 19:24:48 +0100	[thread overview]
Message-ID: <b13d6f81-1679-dada-5bdf-1f94e0ba44c1@gmail.com> (raw)

io_uring is an asynchronous I/O API crafted for efficiency, where one of
the reasons for using shared rings is to reduce context switching. It got
lots of of features since introduction, and pushing it further we want
to give away some of the control over submitting and controlling I/O to
BPF, minimising the number of context switches even more.

- It should keep the number of system calls to a minimum.
- Help to lower overhead on scheduling user processes to CPUs
  when they have not much to do and will go to sleep briefly.
- Be an alternative to submission queue polling for latency
  reduction not taking as much CPU time at the same moment.

We'll go over the current design [1] and decisions, issues and plans,
and hopefully it will engage a discussion and give impetus to curious
minds to try it out and share ideas on how to tailor the API to fit
their use cases.

[1] https://lore.kernel.org/io-uring/a83f147b-ea9d-e693-a2e9-c6ce16659749@gmail.com/T/#m31d0a2ac6e2213f912a200f5e8d88bd74f81406b

Pavel Begunkov

             reply	other threads:[~2021-06-25 18:25 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-25 18:24 Pavel Begunkov [this message]
2021-06-25 18:28 ` Pavel Begunkov

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:

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

  git send-email \
    --in-reply-to=b13d6f81-1679-dada-5bdf-1f94e0ba44c1@gmail.com \
    --to=asml.silence@gmail.com \
    --cc=ksummit@lists.linux.dev \
    --subject='Re: [TECH TOPIC] io_uring: BPF controlled I/O' \


* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

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).