sendfile()
John Myers (jgmyers@netscape.com)
Thu, 13 May 1999 18:12:34 -0700
Ingo Molnar wrote:
> one reason we made syscalls so lightweight is to avoid silly
> 'multi-purpose' conglomerate system calls like NT has. sendfile() has
> mainly not been added to avoid system calls being done, but because it's
> strong (and unique) conceptual foundations. Linux syscalls will be even
> more lightweight in the future. (i have a prototype patch that makes them
> cost 0.30 microseconds) Do you see the point, again an apples to oranges
> problem.
System-call overhead is not the problem with omitting a header argument
to sendfile(). The problem with omitting a header argument to
sendfile() is that the write() causes the header to be sent out as a
short packet. When the application next calls sendfile(), it gets
nailed by Nagle's algorithm.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.rutgers.edu
Please read the FAQ at http://www.tux.org/lkml/