netdev - Re: [PATCH v3] rps: optimize rps_get

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Message-Id: <1272126150.8918.20.camel@bigi>
Date:	Sat, 24 Apr 2010 12:22:30 -0400
From:	jamal <hadi@...erus.ca>
To:	Changli Gao <xiaosuo@...il.com>
Cc:	David Miller <davem@...emloft.net>,
	Tom Herbert <therbert@...gle.com>,
	Eric Dumazet <eric.dumazet@...il.com>, netdev@...r.kernel.org
Subject: Re: [PATCH v3] rps: optimize rps_get_cpu()

On Sun, 2010-04-25 at 00:19 +0800, Changli Gao wrote:

> Maybe I have used the wrong word. Sorry. If the ports are already in
> cache, the new code has only one cache access for ports, and the later
> operations are in registers.

Ok, that makes more sense - so your commit log is confusing.
You are saving a shift operation per packet - probably not a big deal
but better than zero ;->

cheers,
jamal

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