On Wed, 17 Mar 2010 16:07:04 +0100 Manuel Bouyer <bou...@antioche.eu.org> wrote:
> 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). I don't know how much improvement it would make, but I thought it would cut down on context switching. Same reason why single writev() performs better than multiple write().
