From: Rick Jones <rick.jones2@hp.com>
To: Reiner Herrmann <reiner.herrmann@sophos.com>, netdev@vger.kernel.org
Cc: svens@stackframe.org, Vittorio Curcio <Vittorio.Curcio@Sophos.com>
Subject: Re: low vxlan throughput with tso enabled
Date: Tue, 03 Feb 2015 08:36:15 -0800 [thread overview]
Message-ID: <54D0F8FF.1090204@hp.com> (raw)
In-Reply-To: <bde634e5-3c57-4e80-9309-670cbd51c1b9@DE-WIE-EXCH3A.green.sophos>
On 02/03/2015 07:50 AM, Reiner Herrmann wrote:
> I have a vxlan tunnel established between two network interfaces, which
> both have a MTU of 1500. The vxlan interfaces have the same MTU.
> With TSO enabled, I observe low throughput with TCP connections (<100
> kB/s).
> Disabling TSO works around this issue and throughput is as expected.
> Can someone please explain how TSO is influencing the tunnel to cause
> such a difference?
I've been under the impression that one generally wants the MTU of a
tunnel interface to be no more than the MTU of the physical interface
over which it runs, less the size of the encapsulation headers used by
the tunnel. What happens when you make the MTU of the tunnel interface
1400 bytes instead of 1500?
rick jones
next prev parent reply other threads:[~2015-02-03 16:36 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-02-03 15:50 low vxlan throughput with tso enabled Reiner Herrmann
2015-02-03 16:26 ` Tom Herbert
2015-02-04 12:34 ` Reiner Herrmann
2015-02-03 16:36 ` Rick Jones [this message]
2015-02-04 12:42 ` Reiner Herrmann
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=54D0F8FF.1090204@hp.com \
--to=rick.jones2@hp.com \
--cc=Vittorio.Curcio@Sophos.com \
--cc=netdev@vger.kernel.org \
--cc=reiner.herrmann@sophos.com \
--cc=svens@stackframe.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).