netdev - Re: [RFC] [PATCH] udp: optimize lookup of UDP sockets to by including destination address in the hash key

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Message-ID: <877hu5892g.fsf@basil.nowhere.org>
Date:	Thu, 05 Nov 2009 13:12:07 +0100
From:	Andi Kleen <andi@...stfloor.org>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	Octavian Purdila <opurdila@...acom.com>,
	Lucian Adrian Grijincu <lgrijincu@...acom.com>,
	netdev@...r.kernel.org
Subject: Re: [RFC] [PATCH] udp: optimize lookup of UDP sockets to by including destination address in the hash key

Eric Dumazet <eric.dumazet@...il.com> writes:
>
> I have struct reorderings in progress to reduce number of cache lines read
> per socket from two to one. So this would reduce by 50% time to find
> a particular socket in the chain.

Assuming that each access takes equal time seems like a rather dubious
assumption. Consider caches.

-Andi
-- 
ak@...ux.intel.com -- Speaking for myself only.
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