netdev - [PATCH net-next] Performance improvements for socket/close and accept/close.

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Date:	Mon, 9 Mar 2015 14:14:56 -0700
From:	Maciej Żenczykowski <zenczykowski@...il.com>
To:	Maciej Żenczykowski <maze@...gle.com>,
	David Miller <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>
Cc:	"Theodore Ts'o" <tytso@....edu>,
	Linux NetDev <netdev@...r.kernel.org>
Subject: [PATCH net-next] Performance improvements for socket/close and accept/close.

Currently socket/close and accept/close require the acquisition of the
files lock 3 times
(twice in socket/accept, once in close), this patch series cuts this down to 2.

net-next performance on dual socket, 8 cores per socket, 2 HTs per
core, i.e. 32 hyperthreaded intel x86_64 machine:

prior to patch series:

843780 socket/close per sec (single thread)
629763 socket/close per sec (32 threaded process)

after patch series:

856149 socket/close per sec (single thread)
763282 socket/close per sec (32 threaded process)

- Maciej
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