netdev - Re: SO_REUSEPORT - can it be done in kernel?

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Message-ID: <20110301135840.GA8696@gondor.apana.org.au>
Date:	Tue, 1 Mar 2011 21:58:40 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	Thomas Graf <tgraf@...radead.org>,
	David Miller <davem@...emloft.net>, rick.jones2@...com,
	therbert@...gle.com, wsommerfeld@...gle.com,
	daniel.baluta@...il.com, netdev@...r.kernel.org
Subject: Re: SO_REUSEPORT - can it be done in kernel?

On Tue, Mar 01, 2011 at 02:52:46PM +0100, Eric Dumazet wrote:
> Le mardi 01 mars 2011 à 21:18 +0800, Herbert Xu a écrit :
> 
> > Interesting.  So I wonder which lock is showing up at the top
> > of the profile with a single socket then.  As it's definitely
> > going away with multiple sockets, that means it's not the TX
> > queue lock.
> > 
> 
> This CPU also runs named process, so this is socket lock and receive
> queue lock.

It can't be the socket lock because it's an IRQ-disabling variant.
The receive queue lock, I'll buy that.

Cheers,
-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
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