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From: Larry McVoy <lm@bitmover.com>
To: "David S. Miller" <davem@redhat.com>
Cc: Roland Dreier <roland@topspin.com>,
	alan@storlinksemi.com, linux-kernel@vger.kernel.org,
	linux-net@vger.kernel.org, netdev@oss.sgi.com
Subject: Re: TCP IP Offloading Interface
Date: Sun, 13 Jul 2003 16:35:03 -0700	[thread overview]
Message-ID: <20030713233503.GA31793@work.bitmover.com> (raw)
In-Reply-To: <20030713160200.571716cf.davem@redhat.com>

On Sun, Jul 13, 2003 at 04:02:00PM -0700, David S. Miller wrote:
> On send this doesn't matter, on receive you use my clever receive
> buffer handling + flow cache idea to accumulate the data portion of
> packets into page sized chunks for the networking to flip.

Please don't.  I think page flipping was a bad idea.  I think you'd be 
better off to try and make the data flow up the stack in small enough 
windows that it all sits in the cache.

One thing SGI taught me (not that they wanted to do so) is that infinitely
large packets are infinitely stupid, for lots of reasons.  One is that
you have to buffer them somewhere and another is that the bigger they 
are the bigger your cache needs to be to go fast.
-- 
---
Larry McVoy              lm at bitmover.com          http://www.bitmover.com/lm

  reply	other threads:[~2003-07-13 23:20 UTC|newest]

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-07-13  7:33 TCP IP Offloading Interface Alan Shih
2003-07-13  7:48 ` David S. Miller
2003-07-13 16:22   ` Roland Dreier
2003-07-13 16:31     ` Alan Cox
2003-07-13 16:49       ` Jeff Garzik
2003-07-13 16:58       ` Jeff Garzik
2003-07-13 23:02     ` David S. Miller
2003-07-13 23:35       ` Larry McVoy [this message]
2003-07-13 23:40         ` David S. Miller
2003-07-13 23:54           ` Larry McVoy
2003-07-13 23:53             ` David S. Miller
2003-07-14  0:22               ` Larry McVoy
2003-07-14  0:24                 ` David S. Miller
2003-07-14  0:48                   ` Larry McVoy
2003-07-14  0:46               ` Valdis.Kletnieks
2003-07-14  0:42                 ` David S. Miller
2003-07-16  2:46                   ` Matt Porter
2003-07-14  0:20       ` Roland Dreier
2003-07-14  0:28         ` David S. Miller
2003-07-16  2:37   ` Matt Porter
2003-07-13 14:51 ` Jeff Garzik
2003-07-15  5:42 Jordi Ros
2003-07-15  5:51 ` David S. Miller
2003-07-16  5:02   ` jamal
2003-07-16  1:51     ` Roland Dreier
2003-07-15 19:01 ` Ralph Doncaster
2003-07-15 19:36   ` Chris Dukes
2003-07-15 16:28 David griego

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