[103438] in North American Network Operators' Group
Re: latency (was: RE: cooling door)
daemon@ATHENA.MIT.EDU (Steven M. Bellovin)
Sun Mar 30 17:26:40 2008
Date: Sun, 30 Mar 2008 21:25:40 +0000
From: "Steven M. Bellovin" <smb@cs.columbia.edu>
To: Paul Vixie <vixie@isc.org>
Cc: gtb@slac.stanford.edu ("Buhrmaster, Gary"), nanog@merit.edu
In-Reply-To: <g37ifkexli.fsf@sa.vix.com>
Errors-To: owner-nanog@merit.edu
On 30 Mar 2008 21:00:25 +0000
Paul Vixie <vixie@isc.org> wrote:
>
> gtb@slac.stanford.edu ("Buhrmaster, Gary") writes:
>
> > > ... feed "tcp throughput equation" into your favorite search
> > > engine for a lot more references.=20
> >
> > There has been a lot of work in some OS stacks
> > (Vista and recent linux kernels) to enable TCP
> > auto-tuning (of one form or another), ...
>
> on
> <http://www.onlamp.com/pub/a/bsd/2008/02/26/whats-new-in-freebsd-70.html>
> i'd read that freebsd 7 also has some tcp auto tuning logic.
There are certain things that the stack can do, like auto-adjusting the
window size, tuning retransmission intervals, etc. But other problem
are at the application layer, as you noted a few posts ago.
--Steve Bellovin, http://www.cs.columbia.edu/~smb
