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Re: TCP IP Offloading Interface

To: "David S. Miller" <davem@xxxxxxxxxx>
Subject: Re: TCP IP Offloading Interface
From: Larry McVoy <lm@xxxxxxxxxxxx>
Date: Sun, 13 Jul 2003 17:22:00 -0700
Cc: Larry McVoy <lm@xxxxxxxxxxxx>, roland@xxxxxxxxxxx, alan@xxxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, linux-net@xxxxxxxxxxxxxxx, netdev@xxxxxxxxxxx
In-reply-to: <20030713165323.3fc2601f.davem@redhat.com>
Mail-followup-to: Larry McVoy <lm@xxxxxxxxxxxxxxxxx>, "David S. Miller" <davem@xxxxxxxxxx>, Larry McVoy <lm@xxxxxxxxxxxx>, roland@xxxxxxxxxxx, alan@xxxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, linux-net@xxxxxxxxxxxxxxx, netdev@xxxxxxxxxxx
References: <ODEIIOAOPGGCDIKEOPILCEMBCMAA.alan@storlinksemi.com> <20030713004818.4f1895be.davem@redhat.com> <52u19qwg53.fsf@topspin.com> <20030713160200.571716cf.davem@redhat.com> <20030713233503.GA31793@work.bitmover.com> <20030713164003.21839eb4.davem@redhat.com> <20030713235424.GB31793@work.bitmover.com> <20030713165323.3fc2601f.davem@redhat.com>
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On Sun, Jul 13, 2003 at 04:53:23PM -0700, David S. Miller wrote:
> On Sun, 13 Jul 2003 16:54:24 -0700
> Larry McVoy <lm@xxxxxxxxxxxx> wrote:
> 
> > Every time I tried to push the page flip idea or offloading or any of
> > that crap, Andy Bechtolsheim would tell "the CPUs will get faster faster
> > than you can make that work".  He was right.
> 
> I really don't see why receive is so much of a big deal
> compared to send, and we do a send side version of this
> stuff already with zero problems.

Hey, maybe it isn't, but could you please quantify the cost of the VM 
operations?  How hard is that?
-- 
---
Larry McVoy              lm at bitmover.com          http://www.bitmover.com/lm

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