From: Brian Bloniarz <bmb@athenacr•com>
To: Stephen Hemminger <shemminger@vyatta•com>
Cc: dormando <dormando@rydia•net>,
netdev@vger•kernel.org, Rick Jones <rick.jones2@hp•com>,
shemminger@osdl•org
Subject: [PATCH iproute2] document initcwnd
Date: Wed, 05 May 2010 21:37:40 -0400 [thread overview]
Message-ID: <4BE21D64.4040600@athenacr.com> (raw)
In-Reply-To: <20100505150343.0c09c6ba@nehalam>
Stephen Hemminger wrote:
> On Wed, 05 May 2010 16:56:34 -0400
> Brian Bloniarz <bmb@athenacr•com> wrote:
>
>> dormando wrote:
>>>> This sounds like TCP slow start.
>>>>
>>>> http://en.wikipedia.org/wiki/Slow-start
>>>>
>>>> As far as tunables you might want to play with the initcwnd route
>>>> flag (see "ip route help")
>>> Ah, yes, initcwnd was it. I'm well aware of TCP Congestion control / slow
>>> start / etc. However I couldn't find the damn tunable for it :)
>> Documenting the flag in ip(8) might increase its visibility
>> a little. I don't see it documented in the iproute2 git head,
>> though it shows up on http://linux.die.net/man/8/ip somehow.
>>
>> Stephen, do you know why that is?
>
> No one sent me an official patch to change it?
Mention initcwnd in ip(8). Text taken from doc/ip-cref.tex.
Signed-off-by: Brian Bloniarz <bmb@athenacr•com>
diff --git a/man/man8/ip.8 b/man/man8/ip.8
index a5d2915..777a0a7 100644
--- a/man/man8/ip.8
+++ b/man/man8/ip.8
@@ -211,7 +211,9 @@ replace " | " monitor " } "
.B realms
.IR REALM " ] [ "
.B rto_min
-.IR TIME " ]"
+.IR TIME " ] [ "
+.B initcwnd
+.IR NUMBER " ]"
.ti -8
.IR TYPE " := [ "
@@ -1561,6 +1563,13 @@ the clamp for congestion window. It is ignored if the
flag is not used.
.TP
+.BI initcwnd " NUMBER " "(2.5.70+ only)"
+Initial congestion window size for connections to this destination.
+Actual window size is this value multiplied by the MSS
+(``Maximal Segment Size'') for same connection. The default is
+zero, meaning to use the values specified in RFC2414.
+
+.TP
.BI advmss " NUMBER " "(2.3.15+ only)"
the MSS ('Maximal Segment Size') to advertise to these
destinations when establishing TCP connections. If it is not given,
next prev parent reply other threads:[~2010-05-06 1:37 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-05 9:10 3 packet TCP window limit? dormando
2010-05-05 13:26 ` Brian Bloniarz
2010-05-05 20:01 ` dormando
2010-05-05 20:23 ` Rick Jones
2010-05-05 21:31 ` dormando
2010-05-06 6:15 ` Lars Eggert
2010-05-06 8:51 ` dormando
[not found] ` <p2h349f35ee1005061513x1db24de0ld98a40256c481ac2@mail.gmail.com>
[not found] ` <q2ud1c2719f1005061613yf90cd7c6r46ee23cc49858e74@mail.gmail.com>
2010-05-06 23:15 ` Jerry Chu
2010-05-05 20:56 ` Brian Bloniarz
2010-05-05 22:03 ` Stephen Hemminger
2010-05-06 1:37 ` Brian Bloniarz [this message]
2010-05-06 2:33 ` [PATCH iproute2] document initcwnd Stephen Hemminger
2010-05-19 15:31 ` Stephen Hemminger
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=4BE21D64.4040600@athenacr.com \
--to=bmb@athenacr$(echo .)com \
--cc=dormando@rydia$(echo .)net \
--cc=netdev@vger$(echo .)kernel.org \
--cc=rick.jones2@hp$(echo .)com \
--cc=shemminger@osdl$(echo .)org \
--cc=shemminger@vyatta$(echo .)com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
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