From: Alessandro Rubini <rubini-list@gnudd.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] http client?
Date: Wed, 22 Jul 2009 17:23:25 +0200 [thread overview]
Message-ID: <20090722152325.GA2779@mail.gnudd.com> (raw)
In-Reply-To: <20090722151847.37200832E416@gemini.denx.de>
> Hm... but 20 minutes versus 30 seconds cannot be explained by TFTP
> versus HTTP alone. There must be other effects impacting your network
> traffic. Did you run any deeper analysis?
I'm sure it depends on network delays. TCP has the sliding window
mechanism, so several packets can be in flight before you get a single
ack. TFTP requires one ack for each data packet, doesn't it?
If you have high delays, TCP is usually a win, even with relatively
low bandwidth. Otherwise, we need a an UDP protocol that doesn't
require individual ack.
/alessandro
next prev parent reply other threads:[~2009-07-22 15:23 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <B305AA60-B454-4ECE-BC97-F70B484920AB@astfin.org>
2009-07-22 14:04 ` [U-Boot] http client? jeffery palmer
2009-07-22 15:18 ` Wolfgang Denk
2009-07-22 15:23 ` Alessandro Rubini [this message]
2009-07-22 16:00 ` jeffery palmer
2009-07-22 18:55 ` Kenneth Johansson
2009-07-22 20:21 ` Robin Getz
2009-07-22 20:32 ` Ben Warren
2009-07-22 20:51 ` Robin Getz
2009-07-22 20:53 ` Ben Warren
2009-07-22 21:34 ` Robin Getz
2009-07-22 22:00 ` Alessandro Rubini
2009-07-22 22:42 ` Robin Getz
2009-07-23 13:40 ` jeffery palmer
2009-07-24 8:11 ` Alessandro Rubini
2009-07-24 13:15 ` jeffery palmer
2009-07-24 13:40 ` Robin Getz
2009-08-11 18:14 ` Robin Getz
[not found] <200907211237.55476.rgetz@blackfin.uclinux.org>
2009-07-21 18:00 ` Robin Getz
2009-07-21 18:01 ` Ben Warren
2009-07-21 18:45 ` Peter Tyser
2009-07-21 21:09 ` Wolfgang Denk
2009-07-22 12:26 ` Robin Getz
2009-07-22 15:01 ` Wolfgang Denk
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