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Re: Writing to multiple descriptors with one system call

On Wed, Mar 17, 2010 at 12:50:51PM +0000, Sad Clouds wrote:
> [...]
> I profiled a simple event driven server, with 5000 simultaneous
> connections. About 80% of the time was spent in write() system call.

What makes you think that a syscall writing the same data to multiple
descriptors would be faster ?
My guess is that the time is not spent in the syscall code itself,
but in the socket code (or TCP). 

Manuel Bouyer <>
     NetBSD: 26 ans d'experience feront toujours la difference

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