netdev - Re: [PATCH net-next-2.6 V2] net: reorder struct sock fields

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Date:	Tue, 16 Nov 2010 11:35:39 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	eric.dumazet@...il.com
Cc:	netdev@...r.kernel.org
Subject: Re: [PATCH net-next-2.6 V2] net: reorder struct sock fields

From: Eric Dumazet <eric.dumazet@...il.com>
Date: Tue, 16 Nov 2010 16:56:04 +0100

> Le mardi 16 novembre 2010 à 08:12 +0100, Eric Dumazet a écrit :
>> Right now, fields in struct sock are not optimally ordered, because each
>> path (RX softirq, TX completion, RX user,  TX user) has to touch fields
>> that are contained in many different cache lines.
>> 
> 
> Performance testing pointed out I forgot :
> 
> - sk_drops, read for each queued packet, and incremented on packet drops
> - sk_flags tested in sock_def_readable()
> - sk_policy[0]
> 
> Here is V2 of patch :
> 
> [PATCH net-next-2.6 V2] net: reorder struct sock fields

Applied, thanks!
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