netdev - Re: [PATCH net-next] epoll: add EPOLLEXCLUSIVE support

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Message-ID: <20120214213823.GB6097@nuttenaction>
Date:	Tue, 14 Feb 2012 22:38:23 +0100
From:	Hagen Paul Pfeifer <hagen@...u.net>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
	Davide Libenzi <davidel@...ilserver.org>
Subject: Re: [PATCH net-next] epoll: add EPOLLEXCLUSIVE support

* Eric Dumazet | 2012-02-14 22:06:15 [+0100]:

>Seems pretty good to me.
>
>Do you have some performance numbers to share ?

No, but I did some tests with one of my network performance tools. I imagine
that I can *construct* test-cases and add some 'perf stat cs:u' statistics.
IMHO it is not fair to present some artificial tunned performance numbers.
There are use-cases where EPOLLEXCLUSIVE can be really helpfull, yes I think
that this flag SHOULD be a userspace default. ;-)

Hagen
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