netdev - Re: [PATCH net-next] tcp: TCP_NOSENT

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Message-ID: <1374540013.4990.100.camel@edumazet-glaptop>
Date:	Mon, 22 Jul 2013 17:40:13 -0700
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Rick Jones <rick.jones2@...com>
Cc:	David Miller <davem@...emloft.net>,
	netdev <netdev@...r.kernel.org>,
	Yuchung Cheng <ycheng@...gle.com>,
	Neal Cardwell <ncardwell@...gle.com>,
	Michael Kerrisk <mtk.manpages@...il.com>
Subject: Re: [PATCH net-next] tcp: TCP_NOSENT_LOWAT socket option

On Mon, 2013-07-22 at 17:13 -0700, Eric Dumazet wrote:

> 
>  Performance counter stats for './netperf -H 10.246.17.84 -l 20 -t TCP_SENDFILE -c':
> 
>            714,395 context-switches                                            

Hmm, actually I need to send a v3, because sk_stream_write_space() is
waking sockets too often.


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