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<H1>[MUD-Dev] Re: Java I/O and threads.</H1>
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<LI><em>To</em>: <A HREF="mailto:mud-dev#kanga,nu">mud-dev#kanga,nu</A></LI>
<LI><em>Subject</em>: [MUD-Dev] Re: Java I/O and threads.</LI>
<LI><em>From</em>: Elis Pomales <<A HREF="mailto:pomales#caip,rutgers.edu">pomales#caip,rutgers.edu</A>></LI>
<LI><em>Date</em>: Mon, 25 Jan 1999 16:39:46 -0500 (EST)</LI>
<LI><em>Reply-To</em>: <A HREF="mailto:mud-dev#kanga,nu">mud-dev#kanga,nu</A></LI>
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<PRE>
Using pine! cheer!
On Mon, 25 Jan 1999, Jo Dillon wrote:
> Elis Pomales (pomales#caip,rutgers.edu) spake thusly:
> > The current dilemma, is whether I should use threads on a per player (per
> > socket) basis, or implement a polling loop and queue player commands,
> > handling one command per player per loop cycle. The problem with having a
> > thread per player is the context switching overhead. The problem with the
> > polling loop is that I have to check each player to see if they have
> > input. (There is no select() in Java.) Furthermore, processing one command
> > per player may make the system very unresponsive??? Making it seem turn
> > based?
>
> I believe there's no non-blocking I/O either, so as you've foreseen
> it wouldn't be a good plan. It could leave the mud locked up indefinitely,
> in fact ;) With Java your best bet is one thread per socket, I should think.
Yes non-blocking calls can be done by setting So_Linger (I'm at work so
don't ask for specifics :)
So the question still stands :).
> > What solutions have you guys (and gals?) employed in your servers?
> > I guess one way to use the polling loop would be to keep each command as
> > small as possible...
> >
> > PS. I would still use more threads, one for NPC's and one for the game
> > world.
> >
> > PSS. Is having 100+ threads really that bad? (I would think so)
>
> Not necessarily - it depends on your hardware and OS. Java's designed
> to use lots of threads so it's not too much of a worry.
Yes maybe, but if the threads are native threads then we are really
running into context switches...
> --
> Jo
>
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<UL><LI><STRONG>References</STRONG>:
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<LI><STRONG><A NAME="00254" HREF="msg00254.html">[MUD-Dev] Re: Java I/O and threads.</A></STRONG>
<UL><LI><EM>From:</EM> Jo Dillon <emily#thelonious,new.ox.ac.uk></LI></UL></LI>
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<ul><li>Thread context:
<BLOCKQUOTE><UL>
<LI><strong><A NAME="00251" HREF="msg00251.html">[MUD-Dev] Java I/O and threads.</A></strong>,
Elis Pomales <a href="mailto:pomales#caip,rutgers.edu">pomales#caip,rutgers.edu</a>, Mon 25 Jan 1999, 15:19 GMT
<UL>
<LI><strong><A NAME="00254" HREF="msg00254.html">[MUD-Dev] Re: Java I/O and threads.</A></strong>,
Jo Dillon <a href="mailto:emily#thelonious,new.ox.ac.uk">emily#thelonious,new.ox.ac.uk</a>, Mon 25 Jan 1999, 17:19 GMT
<UL>
<LI><strong><A NAME="00255" HREF="msg00255.html">[MUD-Dev] Re: Java I/O and threads.</A></strong>,
cynbe <a href="mailto:cynbe#muq,org">cynbe#muq,org</a>, Mon 25 Jan 1999, 18:12 GMT
<UL>
<LI><strong><A NAME="00257" HREF="msg00257.html">[MUD-Dev] Re: Java I/O and threads.</A></strong>,
Jo Dillon <a href="mailto:emily#thelonious,new.ox.ac.uk">emily#thelonious,new.ox.ac.uk</a>, Mon 25 Jan 1999, 19:04 GMT
</LI>
</UL>
</LI>
<LI><strong><A NAME="00265" HREF="msg00265.html">[MUD-Dev] Re: Java I/O and threads.</A></strong>,
Elis Pomales <a href="mailto:pomales#caip,rutgers.edu">pomales#caip,rutgers.edu</a>, Mon 25 Jan 1999, 21:39 GMT
</LI>
</UL>
</LI>
</UL>
</LI>
<LI><strong><A NAME="00244" HREF="msg00244.html">[MUD-Dev] ADMIN: We're working again.</A></strong>,
J C Lawrence <a href="mailto:claw#kanga,nu">claw#kanga,nu</a>, Mon 25 Jan 1999, 01:49 GMT
<LI><strong><A NAME="00237" HREF="msg00237.html">[MUD-Dev] Re: Mugu</A></strong>,
Chris Gray <a href="mailto:cg#ami-cg,GraySage.Edmonton.AB.CA">cg#ami-cg,GraySage.Edmonton.AB.CA</a>, Thu 21 Jan 1999, 02:42 GMT
<LI><strong><A NAME="00236" HREF="msg00236.html">[MUD-Dev] Re: Graphic design doc</A></strong>,
Chris Gray <a href="mailto:cg#ami-cg,GraySage.Edmonton.AB.CA">cg#ami-cg,GraySage.Edmonton.AB.CA</a>, Thu 21 Jan 1999, 02:31 GMT
<LI><strong><A NAME="00223" HREF="msg00223.html">[MUD-Dev] Re: META: list "peerage"</A></strong>,
Koster, Raph <a href="mailto:rkoster#origin,ea.com">rkoster#origin,ea.com</a>, Thu 21 Jan 1999, 00:06 GMT
</LI>
</UL></BLOCKQUOTE>
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