netdev - Re: [PATCH] NET: Multiqueue network device support.

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Message-Id: <20070612.150035.60555425.davem@davemloft.net>
Date:	Tue, 12 Jun 2007 15:00:35 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	rdreier@...co.com
Cc:	jeff@...zik.org, greearb@...delatech.com, netdev@...r.kernel.org,
	kaber@...sh.net, hadi@...erus.ca, peter.p.waskiewicz.jr@...el.com,
	auke-jan.h.kok@...el.com
Subject: Re: [PATCH] NET: Multiqueue network device support.

From: Roland Dreier <rdreier@...co.com>
Date: Tue, 12 Jun 2007 14:52:11 -0700

> I think you're misunderstanding.  These NICs still have only one
> physical port, so sending or receiving real packets onto a physical
> wire is fundamentally serialized.  The steering of packets to receive
> queues is done right after the packets are received from the wire --
> in fact it can be done as soon as the NIC has parsed enough of the
> headers to make a decision, which might be before the full packet has
> even been received.  The steering is no more of a bottleneck than the
> physical link is.

Yep, that's right.
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