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From: "David S. Miller" <davem@redhat.com>
To: Werner Almesberger <werner@almesberger.net>
Cc: ebiederm@xmission.com, jgarzik@pobox.com, niv@us.ibm.com,
	netdev@oss.sgi.com, linux-kernel@vger.kernel.org
Subject: Re: TOE brain dump
Date: Mon, 4 Aug 2003 12:26:32 -0700	[thread overview]
Message-ID: <20030804122632.65ba2122.davem@redhat.com> (raw)
In-Reply-To: <20030804162433.L5798@almesberger.net>

On Mon, 4 Aug 2003 16:24:33 -0300
Werner Almesberger <werner@almesberger.net> wrote:

> Eric W. Biederman wrote:
> > There is one place in low latency communications that I can think
> > of where TCP/IP is not the proper solution.  For low latency
> > communication the checksum is at the wrong end of the packet.
> 
> That's one of the few things ATM's AAL5 got right.

Let's recall how long the IFF_TRAILERS hack from BSD :-)

> But in the end, I think it doesn't really matter.

I tend to agree on this one.

And on the transmit side if you have more than 1 pending TX frame, you
can always be prefetching the next one into the fifo so that by the
time the medium is ready all the checksum bits have been done.

In fact I'd be surprised if current generation 1g/10g cards are not
doing something like this.

  reply	other threads:[~2003-08-04 19:31 UTC|newest]

Thread overview: 74+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-08-02 17:04 TOE brain dump Werner Almesberger
2003-08-02 17:32 ` Nivedita Singhvi
2003-08-02 18:06   ` Werner Almesberger
2003-08-02 19:08   ` Jeff Garzik
2003-08-02 21:49     ` Werner Almesberger
2003-08-03  6:40       ` Jeff Garzik
2003-08-03 17:57         ` Werner Almesberger
2003-08-03 18:27           ` Erik Andersen
2003-08-03 19:40             ` Larry McVoy
2003-08-03 20:13               ` David Lang
2003-08-03 20:30                 ` Larry McVoy
2003-08-03 21:21                   ` David Lang
2003-08-03 23:44                     ` Larry McVoy
2003-08-03 21:58                   ` Jeff Garzik
2003-08-05 19:28                   ` Timothy Miller
2003-08-03 20:34               ` jamal
2003-08-04  1:47         ` Glen Turner
2003-08-04  3:48           ` Larry McVoy
2003-08-06  7:12         ` Andre Hedrick
     [not found]         ` <Pine.LNX.4.10.10308060009130.25045-100000@master.linux-ide .org>
2003-08-06  8:20           ` Lincoln Dale
2003-08-06  8:22             ` David S. Miller
2003-08-06 13:07               ` Jesse Pollard
2003-08-03 19:21       ` Eric W. Biederman
2003-08-04 19:24         ` Werner Almesberger
2003-08-04 19:26           ` David S. Miller [this message]
2003-08-05 17:19           ` Eric W. Biederman
2003-08-06  5:13             ` Werner Almesberger
2003-08-06  7:58               ` Eric W. Biederman
2003-08-06 13:37                 ` Werner Almesberger
2003-08-06 15:58                   ` Andy Isaacson
2003-08-06 16:27                     ` Chris Friesen
2003-08-06 17:01                       ` Andy Isaacson
2003-08-06 17:55                         ` Matti Aarnio
2003-08-07  2:14                         ` Lincoln Dale
2003-08-06 12:46             ` Jesse Pollard
2003-08-06 16:25               ` Andy Isaacson
2003-08-06 18:58                 ` Jesse Pollard
2003-08-06 19:39                   ` Andy Isaacson
2003-08-06 21:13                     ` David Schwartz
2003-08-03  4:01     ` Ben Greear
2003-08-03  6:22       ` Alan Shih
2003-08-03  6:41         ` Jeff Garzik
2003-08-03  8:25         ` David Lang
2003-08-03 18:05           ` Werner Almesberger
2003-08-03 22:02           ` Alan Shih
2003-08-03 20:52       ` Alan Cox
2003-08-04 14:36     ` Ingo Oeser
2003-08-04 17:19       ` Alan Shih
2003-08-05  8:15         ` Ingo Oeser
2003-08-02 20:57 ` Alan Cox
2003-08-02 22:14   ` Werner Almesberger
2003-08-03 20:51     ` Alan Cox
     [not found] <g83n.8vu.9@gated-at.bofh.it>
2003-08-03 12:13 ` Ihar 'Philips' Filipau
2003-08-03 18:10   ` Werner Almesberger
2003-08-04  8:55     ` Ihar 'Philips' Filipau
2003-08-04 13:08       ` Jesse Pollard
2003-08-04 19:32       ` Werner Almesberger
2003-08-04 19:48         ` David Lang
2003-08-04 19:56           ` Werner Almesberger
2003-08-04 20:01             ` David Lang
2003-08-04 20:09               ` Werner Almesberger
2003-08-04 20:24                 ` David Lang
2003-08-05  1:38                   ` Werner Almesberger
2003-08-05  1:46                     ` David Lang
2003-08-05  1:54                       ` Larry McVoy
2003-08-05  2:30                         ` Werner Almesberger
2003-08-06  1:47                           ` Val Henson
2003-08-05  3:04                       ` Werner Almesberger
2003-08-04 23:30           ` Peter Chubb
     [not found] <gq0f.8bj.9@gated-at.bofh.it>
     [not found] ` <gvCD.4mJ.5@gated-at.bofh.it>
     [not found]   ` <gJmp.7Th.33@gated-at.bofh.it>
     [not found]     ` <gNpS.2YJ.9@gated-at.bofh.it>
2003-08-04 14:15       ` Ihar 'Philips' Filipau
2003-08-04 14:56         ` Jesse Pollard
2003-08-04 15:51           ` Ihar 'Philips' Filipau
2003-08-04 18:36 Perez-Gonzalez, Inaky
2003-08-04 19:03 ` Alan Cox

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