From: Lennert Buytenhek <buytenh@wantstofly.org>
To: Rick Jones <rick.jones2@hp.com>
Cc: netdev@vger.kernel.org, Ashish Karkare <akarkare@marvell.com>,
Nicolas Pitre <nico@cam.org>
Subject: Re: using software TSO on non-TSO capable netdevices
Date: Thu, 31 Jul 2008 19:45:46 +0200 [thread overview]
Message-ID: <20080731174546.GD31160@xi.wantstofly.org> (raw)
In-Reply-To: <4891EFB0.4040003@hp.com>
On Thu, Jul 31, 2008 at 10:00:32AM -0700, Rick Jones wrote:
> >When using sendfile() to send a GiB worth of zeroes over a single TCP
> >connection to another host on a 100 Mb/s network, with a vanilla
> >2.6.27-rc1 kernel, this runs as expected at wire speed, taking the
> >following amount of CPU time per test:
> >
> > sys 0m5.410s
> > sys 0m5.380s
> > sys 0m5.620s
> > sys 0m5.360s
>
> That's output from "time" run against your test program right? Are
> folks confident that will account for all the CPU time consumed on
> behalf of that program?
No, but I wasn't drawing absolute conclusions, just comparing runs
without GSO with runs with GSO. :-)
prev parent reply other threads:[~2008-07-31 17:45 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-07-30 23:50 using software TSO on non-TSO capable netdevices Lennert Buytenhek
2008-07-30 23:56 ` David Miller
2008-07-31 0:41 ` Lennert Buytenhek
2008-07-31 1:10 ` David Miller
2008-07-31 1:45 ` Lennert Buytenhek
2008-07-31 3:54 ` Herbert Xu
2008-07-31 9:45 ` Lennert Buytenhek
2008-07-31 10:55 ` Herbert Xu
2008-07-31 12:37 ` Lennert Buytenhek
2008-07-31 12:59 ` Herbert Xu
2008-08-03 8:23 ` David Miller
2008-07-31 7:34 ` Ilpo Järvinen
2008-07-31 9:50 ` Lennert Buytenhek
2008-07-31 10:27 ` Ilpo Järvinen
2008-07-31 2:29 ` Herbert Xu
2008-07-31 2:36 ` Lennert Buytenhek
2008-07-31 3:03 ` Herbert Xu
2008-07-31 6:55 ` Ilpo Järvinen
2008-07-31 9:39 ` Lennert Buytenhek
2008-07-31 10:14 ` Lennert Buytenhek
2008-07-31 10:16 ` David Miller
2008-07-31 12:25 ` Lennert Buytenhek
2008-07-31 12:35 ` David Miller
2008-07-31 13:19 ` Ben Hutchings
2008-07-31 13:27 ` Herbert Xu
2008-08-03 8:19 ` David Miller
2008-08-03 8:55 ` Herbert Xu
2008-08-07 6:07 ` David Miller
2008-08-07 6:15 ` Herbert Xu
2008-09-12 4:08 ` David Miller
2008-08-07 11:50 ` Lennert Buytenhek
2008-08-07 20:32 ` Rick Jones
2008-08-07 22:44 ` David Miller
2008-07-31 17:00 ` Rick Jones
2008-07-31 17:45 ` Lennert Buytenhek [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
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20080731174546.GD31160@xi.wantstofly.org \
--to=buytenh@wantstofly.org \
--cc=akarkare@marvell.com \
--cc=netdev@vger.kernel.org \
--cc=nico@cam.org \
--cc=rick.jones2@hp.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;
as well as URLs for NNTP newsgroup(s).