From: Andi Kleen <andi@firstfloor.org>
To: Bruce Allen <ballen@gravity.phys.uwm.edu>
Cc: "Brandeburg, Jesse" <jesse.brandeburg@intel.com>,
netdev@vger.kernel.org,
Carsten Aulbert <carsten.aulbert@aei.mpg.de>,
Henning Fehrmann <henning.fehrmann@aei.mpg.de>,
Bruce Allen <bruce.allen@aei.mpg.de>
Subject: Re: e1000 full-duplex TCP performance well below wire speed
Date: Thu, 31 Jan 2008 10:17:14 +0100 [thread overview]
Message-ID: <p738x265p7p.fsf@bingen.suse.de> (raw)
In-Reply-To: <Pine.LNX.4.63.0801301635470.19938@trinity.phys.uwm.edu> (Bruce Allen's message of "Wed\, 30 Jan 2008 17\:07\:28 -0600 \(CST\)")
Bruce Allen <ballen@gravity.phys.uwm.edu> writes:
>
> Important note: we ARE able to get full duplex wire speed (over 900
> Mb/s simulaneously in both directions) using UDP. The problems occur
> only with TCP connections.
Another issue with full duplex TCP not mentioned yet is that if TSO is used
the output will be somewhat bursty and might cause problems with the
TCP ACK clock of the other direction because the ACKs would need
to squeeze in between full TSO bursts.
You could try disabling TSO with ethtool.
-Andi
next prev parent reply other threads:[~2008-01-31 9:17 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-01-30 12:23 e1000 full-duplex TCP performance well below wire speed Bruce Allen
2008-01-30 17:36 ` Brandeburg, Jesse
2008-01-30 18:45 ` Rick Jones
2008-01-30 23:15 ` Bruce Allen
2008-01-31 11:35 ` Carsten Aulbert
2008-01-31 17:55 ` Rick Jones
2008-02-01 19:57 ` Carsten Aulbert
2008-01-30 23:07 ` Bruce Allen
2008-01-31 5:43 ` Brandeburg, Jesse
2008-01-31 8:31 ` Bruce Allen
2008-01-31 18:08 ` Kok, Auke
2008-01-31 18:38 ` Rick Jones
2008-01-31 18:47 ` Kok, Auke
2008-01-31 19:07 ` Rick Jones
2008-01-31 19:13 ` Bruce Allen
2008-01-31 19:32 ` Kok, Auke
2008-01-31 19:48 ` Bruce Allen
2008-02-01 6:27 ` Bill Fink
2008-02-01 7:54 ` Bruce Allen
2008-01-31 15:12 ` Carsten Aulbert
2008-01-31 17:20 ` Brandeburg, Jesse
2008-01-31 17:27 ` Carsten Aulbert
2008-01-31 17:33 ` Brandeburg, Jesse
2008-01-31 18:11 ` running aggregate netperf TCP_RR " Rick Jones
2008-01-31 18:03 ` Rick Jones
2008-01-31 15:18 ` Carsten Aulbert
2008-01-31 9:17 ` Andi Kleen [this message]
2008-01-31 9:59 ` Bruce Allen
2008-01-31 16:09 ` Carsten Aulbert
2008-01-31 18:15 ` Kok, Auke
2008-01-30 19:17 ` Ben Greear
2008-01-30 22:33 ` Bruce Allen
[not found] <Pine.LNX.4.63.0801300324000.6391@trinity.phys.uwm.edu>
2008-01-30 13:53 ` David Miller
2008-01-30 14:01 ` Bruce Allen
2008-01-30 16:21 ` Stephen Hemminger
2008-01-30 22:25 ` Bruce Allen
2008-01-30 22:33 ` Stephen Hemminger
2008-01-30 23:23 ` Bruce Allen
2008-01-31 0:17 ` SANGTAE HA
2008-01-31 8:52 ` Bruce Allen
2008-01-31 11:45 ` Bill Fink
2008-01-31 14:50 ` David Acker
2008-01-31 15:57 ` Bruce Allen
2008-01-31 15:54 ` Bruce Allen
2008-01-31 17:36 ` Bill Fink
2008-01-31 19:37 ` Bruce Allen
2008-01-31 18:26 ` Brandeburg, Jesse
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=p738x265p7p.fsf@bingen.suse.de \
--to=andi@firstfloor.org \
--cc=ballen@gravity.phys.uwm.edu \
--cc=bruce.allen@aei.mpg.de \
--cc=carsten.aulbert@aei.mpg.de \
--cc=henning.fehrmann@aei.mpg.de \
--cc=jesse.brandeburg@intel.com \
--cc=netdev@vger.kernel.org \
/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).