From: Eric Wong <e@80x24.org>
To: yahns-public@yhbt.net
Subject: Re: [RFC/WIP] support non-blocking listeners, too
Date: Mon, 13 May 2019 01:51:33 +0000 [thread overview]
Message-ID: <20190513015133.jtknn3gdp6gydl7g@dcvr> (raw)
In-Reply-To: <20190511121045.maebjf2wc4h4ljrs@dcvr>
Eric Wong <e@80x24.org> wrote:
> While a major design factor of this server was based
> load-balancing with blocking accept() in a dedicated thread,
> non-blocking accept() has become fairer with EPOLLEXCLUSIVE in
> Linux 4.5+.
Actually... not sure if it matters, even. EPOLLEXCLUSIVE still
seems worse off than a blocking accept4() thread. The process
which gets woken from epoll_wait can still be stuck dealing with
application processing or other I/O (the kernel has no way of
knowing that).
Blocking on accept4() is fairer in that regard since it
round-robins the processes.
On a related note, having a multi_accept parameter (like nginx)
should be beneficial to single-process deployments.
prev parent reply other threads:[~2019-05-13 1:51 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-11 12:10 [RFC/WIP] support non-blocking listeners, too Eric Wong
2019-05-13 1:51 ` Eric Wong [this message]
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
List information: http://yhbt.net/yahns/README
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20190513015133.jtknn3gdp6gydl7g@dcvr \
--to=e@80x24.org \
--cc=yahns-public@yhbt.net \
/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.
Code repositories for project(s) associated with this public inbox
http://yhbt.net/yahns.git/
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 read-only IMAP folder(s) and NNTP newsgroup(s).