From: "Jim Schutt" <[email protected]>
Date: Thu, 16 Nov 2006 11:08:59 -0700
> Or is read+write really the fastest way to get data off a
> socket and into a file?
There is still no explicit TCP support for splice/vmsplice so things
get copied around and most of the other advantaves of splice/vmplice
aren't obtained either. So perhaps that explains your numbers.
Jens Axboe tries to get things working, and others have looked into it
too, but adding TCP support is hard and for several reasons folks like
Alexey Kuznetsov and Evgeniy Polyakov believe that sys_receivefile()
is an interface much better suited for TCP receive.
splice/vmsplice has a lot of state connected to a transaction, and
perhaps that is part of why Evgeniy and Alexey have trouble wrapping
their brains around an efficient implementation.
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