netdev - Re: [Bridge] [PATCH] bridge: per-cpu packet statistics

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Message-ID: <20100316024812.GA17535@gondor.apana.org.au>
Date:	Tue, 16 Mar 2010 10:48:12 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Stephen Hemminger <shemminger@...tta.com>
Cc:	eric.dumazet@...il.com, netdev@...r.kernel.org,
	bridge@...ts.linux-foundation.org, davem@...emloft.net
Subject: Re: [Bridge] [PATCH]  bridge: per-cpu packet statistics

Stephen Hemminger <shemminger@...tta.com> wrote:
>
> Bridge is already using lockless transmit LLTX, so tx_lock is not touched.

LLTX doesn't actually buy you anything since you're still going
through a single qdisc.  To get the full benefits of the per-cpu
counters you need to implement multiqueue support in the bridge.

Cheers,
-- 
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Email: Herbert Xu ~{PmV>HI~} <herbert@...dor.apana.org.au>
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