Messages in this thread | | | Date | Tue, 31 Mar 1998 17:12:57 -0800 | From | "David S. Miller" <> | Subject | Re: I/O completion ports for Linux |
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Date: Tue, 31 Mar 1998 17:01:58 -0800 (PST) From: Alex Belits <abelits@phobos.illtel.denver.co.us>
While I/O completion ports may be useful, I can't imagine 30000 simultaneous TCP connections to the single process, or even to the single host doing something. And with all my respect to browsers manufacturers, poll() problem with that will hardly qualify as "scalability", more like fd table size limit. And of course, a browser definitely can't cause such thing to happen, more like server, but still something beyond imaginable size.
Why can't you imagine it? Current Linux-2.1.x can create 30,000 TCP sockets in just under 10 seconds (actually, create _and_ destroy them). But you are right the fd table size limit is another issue.
But once the fd limit is taken care of, poll() scalability in such situations is not all that hard and can probably be done with the current poll() implementation quite easily.
On a seperate related note, poll() scalability is one of the important bottlenecks to fix for a high end web server once the bulk of TCP scales well (ours in 2.1.x certainly does).
Later, David S. Miller davem@dm.cobaltmicro.com
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