From: Jesper Dangaard Brouer <hawk@comx.dk>
To: Chris Wedgwood <cw@f00f.org>
Cc: netdev <netdev@vger.kernel.org>, russell-tcatm@stuart.id.au
Subject: Re: [PATCH 0/2] NET: Accurate packet scheduling for ATM/ADSL
Date: Tue, 20 Jun 2006 09:33:25 +0200 [thread overview]
Message-ID: <1150788805.3480.31.camel@localhost.localdomain> (raw)
In-Reply-To: <20060620053536.GA10311@tuatara.stupidest.org>
[-- Attachment #1: Type: text/plain, Size: 882 bytes --]
On Mon, 2006-06-19 at 22:35 -0700, Chris Wedgwood wrote:
> On Wed, Jun 14, 2006 at 11:40:04AM +0200, Jesper Dangaard Brouer wrote:
>
> > The Linux traffic's control engine inaccurately calculates
> > transmission times for packets sent over ADSL links. For some
> > packet sizes the error rises to over 50%. This occurs because ADSL
> > uses ATM as its link layer transport, and ATM transmits packets in
> > fixed sized 53 byte cells.
>
> What if AAL5 is used? The cell-alignment math is going to be wrong
> there surely?
Actually it _is_ AAL5 which is accounted for.
See Chapter 5 "ADSL link layer overhead" (page 48-54).
http://www.adsl-optimizer.dk/thesis/main_final_hyper.pdf
--
Med venlig hilsen / Best regards
Jesper Brouer
ComX Networks A/S
Linux Network developer
Cand. Scient Datalog / MSc.
Author of http://adsl-optimizer.dk
[-- Attachment #2: This is a digitally signed message part --]
[-- Type: application/pgp-signature, Size: 189 bytes --]
prev parent reply other threads:[~2006-06-20 7:33 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-06-14 9:40 [PATCH 0/2] NET: Accurate packet scheduling for ATM/ADSL Jesper Dangaard Brouer
2006-06-14 12:06 ` jamal
2006-06-14 12:55 ` Jesper Dangaard Brouer
2006-06-15 12:57 ` jamal
2006-06-15 13:16 ` jamal
2006-06-20 1:04 ` Patrick McHardy
2006-06-20 14:59 ` jamal
2006-06-20 15:16 ` Patrick McHardy
2006-06-21 12:21 ` Krzysztof Matusik
2006-06-21 12:54 ` Patrick McHardy
2006-06-21 14:33 ` Krzysztof Matusik
2006-06-14 15:32 ` Andy Furniss
2006-06-20 0:54 ` Patrick McHardy
2006-06-20 14:56 ` jamal
2006-06-20 15:09 ` Patrick McHardy
2006-06-22 18:41 ` jamal
2006-06-23 14:32 ` Patrick McHardy
2006-06-24 14:39 ` jamal
2006-06-26 11:21 ` Patrick McHardy
2006-06-27 13:01 ` jamal
2006-07-02 4:23 ` Patrick McHardy
2006-07-02 13:59 ` jamal
[not found] ` <1150287983.3246.27.camel@ras.pc.brisbane.lube>
[not found] ` <1150292693.5197.1.camel@jzny2>
[not found] ` <1150843471.17455.2.camel@ras.pc.brisbane.lube>
[not found] ` <15653CE98281AD4FBD7F70BCEE3666E53CD54A@comxexch01.comx.local>
[not found] ` <1151000966.5392.34.camel@jzny2>
2006-06-23 12:37 ` Russell Stuart
2006-06-23 15:21 ` Patrick McHardy
2006-06-26 0:45 ` Russell Stuart
2006-06-26 11:10 ` Patrick McHardy
2006-06-27 6:19 ` Russell Stuart
2006-06-27 17:18 ` Patrick McHardy
2006-07-04 13:29 ` Patrick McHardy
2006-07-04 19:29 ` jamal
2006-07-04 23:53 ` Patrick McHardy
2006-07-06 0:39 ` Russell Stuart
2006-07-07 8:00 ` Patrick McHardy
2006-07-10 8:44 ` Russell Stuart
2006-06-24 14:13 ` jamal
2006-06-26 4:23 ` Russell Stuart
2006-07-18 2:06 ` Russell Stuart
2006-07-18 13:35 ` jamal
2006-07-18 21:46 ` Andy Furniss
2006-07-19 1:02 ` Russell Stuart
2006-07-19 14:42 ` Andy Furniss
2006-07-19 14:54 ` Patrick McHardy
2006-07-19 20:26 ` [PATCH 0/2] NET: Accurate packet scheduling for ATM/ADSL (RTAB BUG) Jesper Dangaard Brouer
2006-07-19 21:00 ` Alexey Kuznetsov
2006-07-20 5:47 ` Russell Stuart
2006-07-20 23:49 ` Alexey Kuznetsov
2006-07-19 14:50 ` [PATCH 0/2] NET: Accurate packet scheduling for ATM/ADSL Patrick McHardy
2006-07-20 4:56 ` Russell Stuart
2006-07-30 23:06 ` Russell Stuart
2006-08-08 22:01 ` Russell Stuart
2006-08-09 11:33 ` jamal
2006-09-04 10:37 ` Russell Stuart
2006-06-14 14:27 ` Phillip Susi
2006-06-14 15:08 ` Jesper Dangaard Brouer
2006-06-20 5:35 ` Chris Wedgwood
2006-06-20 7:33 ` Jesper Dangaard Brouer [this message]
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=1150788805.3480.31.camel@localhost.localdomain \
--to=hawk@comx.dk \
--cc=cw@f00f.org \
--cc=netdev@vger.kernel.org \
--cc=russell-tcatm@stuart.id.au \
/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).