From: "Morten Brørup" <mb@smartsharesystems.com>
To: <dev@dpdk.org>
Cc: <honnappa.nagarahalli@arm.com>, <konstantin.v.ananyev@yandex.ru>
Subject: Ring library optimization idea
Date: Sun, 20 Aug 2023 11:23:38 +0200 [thread overview]
Message-ID: <98CBD80474FA8B44BF855DF32C47DC35D87B21@smartserver.smartshare.dk> (raw)
Most of the fast path ring library functions access the two cache lines containing respectively the r->prod and r->cons structures.
Some of the fast path functions also have to fetch r->capacity and r->mask, which reside in another cache line.
What do you think about adding shadow variables of r->capacity and r->mask to the same cache line as r->prod, to improve ring library performance (by avoiding having to read a third cache line) when under CPU cache pressure?
-Morten
next reply other threads:[~2023-08-20 9:23 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-08-20 9:23 Morten Brørup [this message]
2023-08-21 4:40 ` Honnappa Nagarahalli
2023-08-21 10:19 ` Konstantin Ananyev
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=98CBD80474FA8B44BF855DF32C47DC35D87B21@smartserver.smartshare.dk \
--to=mb@smartsharesystems.com \
--cc=dev@dpdk.org \
--cc=honnappa.nagarahalli@arm.com \
--cc=konstantin.v.ananyev@yandex.ru \
/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).