LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
From: Eric Dumazet <eric.dumazet@gmail.com>
To: Andy Lutomirski <luto@kernel.org>, Matthew Wilcox <willy@infradead.org>
Cc: Eric Dumazet <eric.dumazet@gmail.com>,
Christoph Hellwig <hch@infradead.org>,
Eric Dumazet <edumazet@google.com>,
"David S . Miller" <davem@davemloft.net>,
netdev <netdev@vger.kernel.org>,
linux-kernel <linux-kernel@vger.kernel.org>,
linux-mm <linux-mm@kvack.org>,
Soheil Hassas Yeganeh <soheil@google.com>
Subject: Re: [PATCH net-next 1/2] tcp: add TCP_ZEROCOPY_RECEIVE support for zerocopy receive
Date: Wed, 25 Apr 2018 09:35:10 -0700 [thread overview]
Message-ID: <155a86d5-a910-c366-f521-216a0582bad8@gmail.com> (raw)
In-Reply-To: <CALCETrWaekirEe+rKiPB-Zim6ZHKL-n7nfk9wrsHra_FtrS=DA@mail.gmail.com>
On 04/25/2018 09:22 AM, Andy Lutomirski wrote:
> In general, I suspect that the zerocopy receive mechanism will only
> really be a win in single-threaded applications that consume large
> amounts of receive bandwidth on a single TCP socket using lots of
> memory and don't do all that much else.
This was dully noted in the original patch submission.
https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git/commit/?id=309c446cb45f6663932c8e6d0754f4ac81d1b5cd
Our intent at Google is to use it for some specific 1MB+ receives, not as a generic and universal mechanism.
The major benefit is really the 4KB+ MTU, allowing to pack exactly 4096 bytes of payload per page.
next prev parent reply other threads:[~2018-04-25 16:35 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-04-25 5:27 [PATCH net-next 0/2] tcp: mmap: rework " Eric Dumazet
2018-04-25 5:27 ` [PATCH net-next 1/2] tcp: add TCP_ZEROCOPY_RECEIVE support for " Eric Dumazet
2018-04-25 6:28 ` Christoph Hellwig
2018-04-25 13:01 ` Eric Dumazet
2018-04-25 15:24 ` Christoph Hellwig
2018-04-25 16:04 ` Matthew Wilcox
2018-04-25 16:20 ` Eric Dumazet
2018-04-25 16:30 ` Matthew Wilcox
2018-04-25 16:22 ` Andy Lutomirski
2018-04-25 16:35 ` Eric Dumazet [this message]
2018-04-25 16:44 ` Eric Dumazet
2018-04-25 13:42 ` Eric Dumazet
2018-04-25 5:27 ` [PATCH net-next 2/2] selftests: net: tcp_mmap must use TCP_ZEROCOPY_RECEIVE Eric Dumazet
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=155a86d5-a910-c366-f521-216a0582bad8@gmail.com \
--to=eric.dumazet@gmail.com \
--cc=davem@davemloft.net \
--cc=edumazet@google.com \
--cc=hch@infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=luto@kernel.org \
--cc=netdev@vger.kernel.org \
--cc=soheil@google.com \
--cc=willy@infradead.org \
--subject='Re: [PATCH net-next 1/2] tcp: add TCP_ZEROCOPY_RECEIVE support for zerocopy receive' \
/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
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).