From: David Miller <davem@davemloft.net>
To: rick.jones2@hp.com
Cc: netdev@vger.kernel.org
Subject: Re: lowpri - RTO for unidirectional reciever
Date: Mon, 08 Dec 2008 23:56:22 -0800 (PST) [thread overview]
Message-ID: <20081208.235622.149344934.davem@davemloft.net> (raw)
In-Reply-To: <493DD199.6080600@hp.com>
From: Rick Jones <rick.jones2@hp.com>
Date: Mon, 08 Dec 2008 18:02:01 -0800
> A Mac OSX bug was found/presumed, but there was an interesting
> behaviour on the linux receiver side as well - the rtx of the
> ignored FIN happened after what IIRC is the initial RTO. It
> suggested that the ACK of the SYN|ACK didn't update the rtt estimate
> or if it did, didn't so so very much. Bug? Feature? No idea, but
> food for thought.
We should not use the SYN|ACK for RTT estimates.
It's a bug, and in fact we used to, but I fixed that long
ago.
Since there is no data in the packet, and it's therefore very small
compared to real data bearing packets, the RTT measured might be
artificially small and not really representative.
next prev parent reply other threads:[~2008-12-09 7:56 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-12-09 2:02 lowpri - RTO for unidirectional reciever Rick Jones
2008-12-09 7:56 ` David Miller [this message]
2008-12-09 19:25 ` Rick Jones
2008-12-09 21:43 ` David Miller
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=20081208.235622.149344934.davem@davemloft.net \
--to=davem@davemloft.net \
--cc=netdev@vger.kernel.org \
--cc=rick.jones2@hp.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;
as well as URLs for NNTP newsgroup(s).