From: Stephen Hemminger <shemminger@vyatta.com>
To: Lucas Nussbaum <lucas.nussbaum@loria.fr>
Cc: netdev@vger.kernel.org, Sangtae Ha <sha2@ncsu.edu>
Subject: Re: [PATCH] Make CUBIC Hystart more robust to RTT variations
Date: Thu, 10 Mar 2011 15:28:48 -0800 [thread overview]
Message-ID: <20110310152848.7b515511@nehalam> (raw)
In-Reply-To: <20110308093215.GA23842@xanadu.blop.info>
On Tue, 8 Mar 2011 10:32:15 +0100
Lucas Nussbaum <lucas.nussbaum@loria.fr> wrote:
> CUBIC Hystart uses two heuristics to exit slow start earlier, before
> losses start to occur. Unfortunately, it tends to exit slow start far too
> early, causing poor performance since convergence to the optimal cwnd is
> then very slow. This was reported in
> http://permalink.gmane.org/gmane.linux.network/188169 and
> https://partner-bugzilla.redhat.com/show_bug.cgi?id=616985
Ignore the RHEL bug. RHEL 5 ships with TCP BIC (not CUBIC) by default.
There are many research papers which show that BIC is too aggressive,
and not fair.
--
next prev parent reply other threads:[~2011-03-10 23:28 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-03-08 9:32 [PATCH] Make CUBIC Hystart more robust to RTT variations Lucas Nussbaum
2011-03-08 10:21 ` WANG Cong
2011-03-08 11:10 ` Lucas Nussbaum
2011-03-08 15:26 ` Injong Rhee
2011-03-08 19:43 ` David Miller
2011-03-08 23:21 ` Stephen Hemminger
2011-03-09 1:30 ` Injong Rhee
2011-03-09 6:53 ` Lucas Nussbaum
2011-03-09 17:56 ` Stephen Hemminger
2011-03-09 18:25 ` Lucas Nussbaum
2011-03-09 19:56 ` Stephen Hemminger
2011-03-09 21:28 ` Lucas Nussbaum
2011-03-09 20:01 ` Stephen Hemminger
2011-03-09 21:12 ` Yuchung Cheng
2011-03-09 21:33 ` Lucas Nussbaum
2011-03-09 21:51 ` Stephen Hemminger
2011-03-09 22:03 ` Lucas Nussbaum
2011-03-10 5:24 ` Bill Fink
2011-03-10 6:17 ` Stephen Hemminger
2011-03-10 7:17 ` Bill Fink
2011-03-10 8:54 ` Lucas Nussbaum
2011-03-11 2:25 ` Bill Fink
2011-03-10 14:37 ` Injong Rhee
2011-03-09 1:33 ` Sangtae Ha
[not found] ` <AANLkTimdpEKHfVKw+bm6OnymcnUrauU+jGOPeLzy3Q0o@mail.gmail.com>
2011-03-08 18:14 ` Lucas Nussbaum
2011-03-10 23:28 ` Stephen Hemminger [this message]
2011-03-11 5:59 ` Lucas Nussbaum
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=20110310152848.7b515511@nehalam \
--to=shemminger@vyatta.com \
--cc=lucas.nussbaum@loria.fr \
--cc=netdev@vger.kernel.org \
--cc=sha2@ncsu.edu \
/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).