General list for discussing Bufferbloat
 help / color / mirror / Atom feed
From: Rick Jones <rick.jones2@hp.com>
To: richard <richard@pacdat.net>
Cc: bloat <bloat@lists.bufferbloat.net>
Subject: Re: [Bloat] Random idea in reaction to all the discussion of TCPflavours - timestamps?
Date: Wed, 16 Mar 2011 16:50:08 -0700	[thread overview]
Message-ID: <1300319408.2087.2281.camel@tardy> (raw)
In-Reply-To: <1300318732.19833.12.camel@amd.pacdat.net>


> > Furthermore, I learned that a couple of 10G switch vendors are planning to 
> > have up to 4 GB of buffer RAM in their next generation of switches. So we 
> > are not talking about thousands of packets in the buffer, but of millions of 
> > packets (think of up to 400ms buffering if only a single 10G egress port is 
> > being loaded in such a switch). Compared to the base RTT of a 10G network (a 
> > few tens of microseconds, some vendors go even below a microsecond), this is 
> > even more extreme than the home router / DSLAM scenario...
> > 
> 
> The stuff for the future involves getting to the designers and getting
> them to understand the situation they're putting the rest of the net in
> while they play their pissing games with marketing (is there any other
> reason for 4 GB of buffer in any switch?), etc. That and getting the
> basic research done, measurement facilities in place, and long-term
> methodologies to really fix the problem "forever".

4GB shared across N ports no?  And 10GBASE-ER can go 40 km.  Where might
pause and FCoE wedge into this?

rick jones


  reply	other threads:[~2011-03-16 23:50 UTC|newest]

Thread overview: 70+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-03-15 10:36 [Bloat] Random idea in reaction to all the discussion of TCP flavours " Jim Gettys
2011-03-15 14:40 ` Jim Gettys
2011-03-15 16:47   ` Jonathan Morton
2011-03-15 17:59     ` Don Marti
2011-03-15 18:14       ` Rick Jones
2011-03-15 18:31         ` John W. Linville
2011-03-15 19:40           ` Jonathan Morton
2011-03-15 19:59             ` Rick Jones
2011-03-15 20:51             ` John W. Linville
2011-03-15 21:31               ` Rick Jones
2011-03-16  0:32                 ` John W. Linville
2011-03-16  1:02                   ` Rick Jones
2011-03-15 22:01               ` Jonathan Morton
2011-03-15 22:19                 ` Stephen Hemminger
2011-03-15 22:26                   ` Jonathan Morton
2011-03-15 22:36                     ` Rick Jones
2011-03-15 22:40                       ` Jonathan Morton
2011-03-15 22:42                         ` Stephen Hemminger
2011-03-15 22:52                       ` Eric Dumazet
2011-03-15 23:02                         ` Rick Jones
2011-03-15 23:12                         ` Jonathan Morton
2011-03-15 23:25                           ` Rick Jones
2011-03-15 23:33                             ` Jonathan Morton
2011-03-15 23:46                         ` Dave Täht
2011-03-16  0:49                           ` Jonathan Morton
2011-03-16  1:02                             ` Dave Täht
2011-03-16  1:28                               ` Jonathan Morton
2011-03-16  1:59                                 ` Dave Täht
2011-03-16  2:23                                   ` Jonathan Morton
2011-03-16 22:22                                     ` [Bloat] Random idea in reaction to all the discussion of TCPflavours " Richard Scheffenegger
2011-03-16 23:38                                       ` richard
2011-03-16 23:50                                         ` Rick Jones [this message]
2011-03-17 12:05                                       ` Fred Baker
2011-03-17 12:18                                         ` Fred Baker
2011-03-17 17:27                                           ` Dave Täht
2011-03-18 18:30                                           ` Richard Scheffenegger
2011-03-18 18:49                                             ` Fred Baker
2011-03-20 11:40                                               ` Jonathan Morton
2011-03-20 22:18                                                 ` david
2011-03-20 22:45                                                   ` Jonathan Morton
2011-03-20 22:50                                                     ` Dave Täht
2011-03-20 22:55                                                       ` grenville armitage
2011-03-20 23:04                                                         ` Dave Täht
2011-03-20 23:14                                                           ` Jonathan Morton
2011-03-20 23:19                                                             ` Dave Täht
2011-03-20 23:23                                                               ` Dave Täht
2011-03-20 22:58                                                       ` Jonathan Morton
2011-03-21  1:28                                                     ` david
2011-03-21  1:56                                                       ` Wesley Eddy
2011-03-18 18:27                                       ` [Bloat] Random idea in reaction to all the discussion ofTCPflavours " Richard Scheffenegger
2011-03-16 22:07                           ` [Bloat] Random idea in reaction to all the discussion of TCPflavours " Richard Scheffenegger
2011-03-17  0:10                             ` Jonathan Morton
2011-03-16  0:47                 ` [Bloat] Random idea in reaction to all the discussion of TCP flavours " John W. Linville
2011-03-16 20:07                   ` Jim Gettys
2011-03-17  2:26                     ` Jonathan Morton
2011-03-17 18:22                       ` Rick Jones
2011-03-17 21:50                         ` Jonathan Morton
2011-03-17 22:20                           ` Rick Jones
2011-03-17 22:56                             ` Jonathan Morton
2011-03-18  1:36                               ` Justin McCann
2011-03-18  5:51                             ` Eric Dumazet
2011-03-15 16:34 ` Jonathan Morton
2011-03-15 18:13   ` Stephen Hemminger
2011-03-16  5:41 ` Fred Baker
2011-03-16  6:26   ` Jonathan Morton
2011-03-16  8:55 ` [Bloat] Random idea in reaction to all the discussion of TCPflavours " Richard Scheffenegger
2011-03-16  9:04 ` [Bloat] Random idea in reaction to all the discussion of TCP flavours " BeckW
2011-03-16 22:48   ` Fred Baker
2011-03-16 23:23     ` Jonathan Morton
2011-03-17  8:34     ` BeckW

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

  List information: https://lists.bufferbloat.net/postorius/lists/bloat.lists.bufferbloat.net/

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=1300319408.2087.2281.camel@tardy \
    --to=rick.jones2@hp.com \
    --cc=bloat@lists.bufferbloat.net \
    --cc=richard@pacdat.net \
    /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