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<H1>Re: [MUD-Dev] Multi-threaded mud server.</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>: Re: [MUD-Dev] Multi-threaded mud server.</LI>
<LI><em>From</em>: Jo Dillon <<A HREF="mailto:emily#thelonious,new.ox.ac.uk">emily#thelonious,new.ox.ac.uk</A>></LI>
<LI><em>Date</em>: Mon, 17 May 1999 17:09:54 +0100</LI>
<LI><em>Mail-Followup-To</em>: mud-dev#kanga,nu</LI>
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<PRE>
Jon A. Lambert (jlsysinc#ix,netcom.com) spake thusly:
> Here's a common example:
>
> There exists a 400 mhz Pentium II single-processor with 64 Mb of memory
> running Redhat Linux. Running on the server is ftpd, httpd, telnetd,
> smptd, dns, a stock Diku mud server, a DGD LP mud server, and a ColdMUD
> server. The server is probably underloaded.
>
> Is there context switching going on here? YES! Loads and loads of the
> "expensive" process-level context switching.
>
> <rant>
> Now suppose I wish to redesign and multi-thread that Diku mud server.
> Why would I WORRY about the overhead of "cheaper" thread-level context
> switching?
> Why should I CARE at the application-level how many processors are
> present on the friggin box!?!@#!??
> </rant>
>
Isn't the point that every time you context switch you invalidate the
cache (since the new thread of execution will be in a different chunk of
memory to the old one), and therefore if you have more threads than
processors you context-switch <bignum> times a second, therefore constantly
invalidating your cache and giving yourself a big speed hit?
--
Jo
_______________________________________________
MUD-Dev maillist - MUD-Dev#kanga,nu
<A HREF="http://www.kanga.nu/lists/listinfo/mud-dev">http://www.kanga.nu/lists/listinfo/mud-dev</A>
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<li><strong><A NAME="00315" HREF="msg00315.html">Re: [MUD-Dev] Multi-threaded mud server.</A></strong>
<ul compact><li><em>From:</em> "Jon A. Lambert" <jlsysinc#ix,netcom.com></li></ul>
<li><strong><A NAME="00308" HREF="msg00308.html">Re: [MUD-Dev] Multi-threaded mud server.</A></strong>
<ul compact><li><em>From:</em> "Travis S. Casey" <efindel#io,com></li></ul>
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<LI><STRONG><A NAME="00273" HREF="msg00273.html">Re: [MUD-Dev] Multi-threaded mud server.</A></STRONG>
<UL><LI><EM>From:</EM> Caliban Tiresias Darklock <caliban#darklock,com></LI></UL></LI>
<LI><STRONG><A NAME="00283" HREF="msg00283.html">Re: [MUD-Dev] Multi-threaded mud server.</A></STRONG>
<UL><LI><EM>From:</EM> "Jon A. Lambert" <jlsysinc#ix,netcom.com></LI></UL></LI>
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<ul><li>Thread context:
<BLOCKQUOTE><UL>
<LI><STRONG>Re: [MUD-Dev] Multi-threaded mud server.</STRONG>, <EM>(continued)</EM>
<ul compact>
<ul compact>
<ul compact>
<LI><strong><A NAME="00284" HREF="msg00284.html">Re: [MUD-Dev] Multi-threaded mud server.</A></strong>,
Jon A. Lambert <a href="mailto:jlsysinc#ix,netcom.com">jlsysinc#ix,netcom.com</a>, Mon 17 May 1999, 15:46 GMT
<UL>
<LI><strong><A NAME="00294" HREF="msg00294.html">Re: [MUD-Dev] Multi-threaded mud server.</A></strong>,
Ross Nicoll <a href="mailto:rnicoll#lostics,demon.co.uk">rnicoll#lostics,demon.co.uk</a>, Tue 18 May 1999, 06:42 GMT
</LI>
</UL>
</LI>
</ul>
<LI><strong><A NAME="00283" HREF="msg00283.html">Re: [MUD-Dev] Multi-threaded mud server.</A></strong>,
Jon A. Lambert <a href="mailto:jlsysinc#ix,netcom.com">jlsysinc#ix,netcom.com</a>, Mon 17 May 1999, 15:45 GMT
<UL>
<LI><strong><A NAME="00301" HREF="msg00301.html">Re: [MUD-Dev] Multi-threaded mud server.</A></strong>,
Mik Clarke <a href="mailto:mikclrk#ibm,net">mikclrk#ibm,net</a>, Tue 18 May 1999, 07:01 GMT
</LI>
<LI><strong><A NAME="00302" HREF="msg00302.html">Re: [MUD-Dev] Multi-threaded mud server.</A></strong>,
Jo Dillon <a href="mailto:emily#thelonious,new.ox.ac.uk">emily#thelonious,new.ox.ac.uk</a>, Tue 18 May 1999, 07:02 GMT
<UL>
<LI><strong><A NAME="00308" HREF="msg00308.html">Re: [MUD-Dev] Multi-threaded mud server.</A></strong>,
Travis S. Casey <a href="mailto:efindel#io,com">efindel#io,com</a>, Wed 19 May 1999, 04:47 GMT
</LI>
<LI><strong><A NAME="00315" HREF="msg00315.html">Re: [MUD-Dev] Multi-threaded mud server.</A></strong>,
Jon A. Lambert <a href="mailto:jlsysinc#ix,netcom.com">jlsysinc#ix,netcom.com</a>, Thu 20 May 1999, 05:20 GMT
</LI>
</UL>
</LI>
<LI><strong><A NAME="00337" HREF="msg00337.html">Re: [MUD-Dev] Multi-threaded mud server.</A></strong>,
Ross Nicoll <a href="mailto:rnicoll#lostics,demon.co.uk">rnicoll#lostics,demon.co.uk</a>, Fri 28 May 1999, 21:03 GMT
<UL>
<LI><strong><A NAME="00352" HREF="msg00352.html">Re: [MUD-Dev] Multi-threaded mud server.</A></strong>,
Jon A. Lambert <a href="mailto:jlsysinc#ix,netcom.com">jlsysinc#ix,netcom.com</a>, Sun 30 May 1999, 04:45 GMT
</LI>
</UL>
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