From: Jens Axboe <axboe@kernel.dk>
To: Olivier Langlois <olivier@trillion01.com>,
Pavel Begunkov <asml.silence@gmail.com>,
io-uring@vger.kernel.org
Subject: Re: [PATCH v3 0/3] napi tracking strategy
Date: Wed, 18 Sep 2024 20:36:45 -0600 [thread overview]
Message-ID: <ea764e4c-0255-480f-949f-c67e7fe79e29@kernel.dk> (raw)
In-Reply-To: <cover.1726589775.git.olivier@trillion01.com>
On 9/18/24 6:59 AM, Olivier Langlois wrote:
> the actual napi tracking strategy is inducing a non-negligeable overhead.
> Everytime a multishot poll is triggered or any poll armed, if the napi is
> enabled on the ring a lookup is performed to either add a new napi id into
> the napi_list or its timeout value is updated.
>
> For many scenarios, this is overkill as the napi id list will be pretty
> much static most of the time. To address this common scenario, a new
> abstraction has been created following the common Linux kernel idiom of
> creating an abstract interface with a struct filled with function pointers.
This paragraph seems to be a remnant of the v1 implementation?
--
Jens Axboe
next prev parent reply other threads:[~2024-09-19 2:36 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-09-18 12:59 [PATCH v3 0/3] napi tracking strategy Olivier Langlois
2024-09-18 12:59 ` [PATCH v3 1/3] io_uring/napi: protect concurrent io_napi_entry timeout accesses Olivier Langlois
2024-09-18 12:59 ` [PATCH v3 2/3] io_uring/napi: fix io_napi_entry RCU accesses Olivier Langlois
2024-09-18 12:59 ` [PATCH v3 3/3] io_uring/napi: add static napi tracking strategy Olivier Langlois
2024-09-19 2:59 ` Jens Axboe
2024-09-21 13:51 ` Olivier Langlois
2024-09-19 2:36 ` Jens Axboe [this message]
2024-09-21 13:32 ` [PATCH v3 0/3] " Olivier Langlois
2024-09-21 13:46 ` Jens Axboe
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=ea764e4c-0255-480f-949f-c67e7fe79e29@kernel.dk \
--to=axboe@kernel.dk \
--cc=asml.silence@gmail.com \
--cc=io-uring@vger.kernel.org \
--cc=olivier@trillion01.com \
/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