From: Dave Taht <dave.taht@gmail.com>
To: Pete Heist <peteheist@gmail.com>
Cc: Jonathan Morton <chromatix99@gmail.com>,
Cake List <cake@lists.bufferbloat.net>
Subject: Re: [Cake] Cake latency update
Date: Sun, 12 Feb 2017 05:08:55 -0800 [thread overview]
Message-ID: <CAA93jw6cKOZrJkR5SCuPPHH1T9p2XPG=vgcAA3wT4GHs91=NGw@mail.gmail.com> (raw)
In-Reply-To: <967D2491-5DB5-45CC-B4C5-E8FF48743504@gmail.com>
Disable offloads on the sky hardware and see what happens?
ethtool -K gro off tso off gso off your_device
How old is the OS on that hardware - offloads have always been tricksy.
as to why you might be seeing it more with cake, with this stuff on,
you are not necessarily checking every packet for checksums, and flows
are "finer" - more mixed up packets.
capturing these events with tcpdump at various points on the path might help.
Still, these are the kinds of baseline deployment issues that block
progress elsewhere. The whole first stage of the rocket has to succeed
in order to test the second. Doesn't matter how good your second stage
is, if you RUD the first.
Good digging!
next prev parent reply other threads:[~2017-02-12 13:08 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-02-09 16:36 Pete Heist
2017-02-09 20:52 ` Jonathan Morton
2017-02-10 8:04 ` Pete Heist
2017-02-10 8:49 ` Jonathan Morton
2017-02-10 9:21 ` Pete Heist
2017-02-10 9:29 ` Jonathan Morton
2017-02-10 10:05 ` Pete Heist
2017-02-10 10:31 ` Jonathan Morton
2017-02-10 11:08 ` Pete Heist
2017-02-10 11:35 ` Sebastian Moeller
2017-02-10 12:21 ` Pete Heist
2017-02-12 12:43 ` Pete Heist
2017-02-12 13:08 ` Dave Taht [this message]
2017-02-12 14:12 ` Pete Heist
2017-02-12 16:37 ` Pete Heist
2017-02-12 16:41 ` Jonathan Morton
2017-02-12 17:15 ` Pete Heist
2017-02-14 10:02 ` Pete Heist
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
List information: https://lists.bufferbloat.net/postorius/lists/cake.lists.bufferbloat.net/
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to='CAA93jw6cKOZrJkR5SCuPPHH1T9p2XPG=vgcAA3wT4GHs91=NGw@mail.gmail.com' \
--to=dave.taht@gmail.com \
--cc=cake@lists.bufferbloat.net \
--cc=chromatix99@gmail.com \
--cc=peteheist@gmail.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