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

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Date:	Wed, 06 Jun 2007 16:58:54 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	rick.jones2@...com
Cc:	hadi@...erus.ca, kaber@...sh.net, peter.p.waskiewicz.jr@...el.com,
	netdev@...r.kernel.org, jeff@...zik.org, auke-jan.h.kok@...el.com
Subject: Re: [PATCH] NET: Multiqueue network device support.

From: Rick Jones <rick.jones2@...com>
Date: Wed, 06 Jun 2007 16:48:59 -0700

>   > RX queues - yes, I can see;  TX queues, it doesnt make sense to put
> > different rings on different CPUs.
> 
> To what extent might that preclude some cachelines bouncing hither and 
> yon between the CPUs?

I think per-TX-queue locking takes locality as another advantage.
You only touch the TX descriptors for queue N, rather than a single
globally shared one.

Same goes for RX.
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