<!-- MHonArc v2.4.4 --> <!--X-Subject: Re: [MUD-Dev] Multi-threaded mud server. --> <!--X-From-R13: "Xba O. Znzoreg" <wyflfvapNvk.argpbz.pbz> --> <!--X-Date: Mon, 17 May 1999 08:45:41 -0700 --> <!--X-Message-Id: 199905170504.AAA19224@dfw-ix5.ix.netcom.com --> <!--X-Content-Type: text/plain --> <!--X-Reference: Pine.LNX.4.10.9905162033590.4142-100000@drpc-jrn.res.st-an d.ac.uk --> <!--X-Reference: 4.1.19990516165255.00a48770#pop,darklock.com --> <!--X-Head-End--> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN"> <html> <head> <title>MUD-Dev message, Re: [MUD-Dev] Multi-threaded mud server.</title> <!-- meta name="robots" content="noindex,nofollow" --> <link rev="made" href="mailto:jlsysinc#ix,netcom.com"> </head> <body background="/backgrounds/paperback.gif" bgcolor="#ffffff" text="#000000" link="#0000FF" alink="#FF0000" vlink="#006000"> <font size="+4" color="#804040"> <strong><em>MUD-Dev<br>mailing list archive</em></strong> </font> <br> [ <a href="../">Other Periods</a> | <a href="../../">Other mailing lists</a> | <a href="/search.php3">Search</a> ] <br clear=all><hr> <!--X-Body-Begin--> <!--X-User-Header--> <!--X-User-Header-End--> <!--X-TopPNI--> Date: [ <a href="msg00282.html">Previous</a> | <a href="msg00284.html">Next</a> ] Thread: [ <a href="msg00294.html">Previous</a> | <a href="msg00301.html">Next</a> ] Index: [ <A HREF="author.html#00283">Author</A> | <A HREF="#00283">Date</A> | <A HREF="thread.html#00283">Thread</A> ] <!--X-TopPNI-End--> <!--X-MsgBody--> <!--X-Subject-Header-Begin--> <H1>Re: [MUD-Dev] Multi-threaded mud server.</H1> <HR> <!--X-Subject-Header-End--> <!--X-Head-of-Message--> <UL> <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>: "Jon A. Lambert" <<A HREF="mailto:jlsysinc#ix,netcom.com">jlsysinc#ix,netcom.com</A>></LI> <LI><em>Date</em>: Mon, 17 May 1999 01:03:47 -5</LI> <LI><em>Reply-To</em>: <A HREF="mailto:mud-dev#kanga,nu">mud-dev#kanga,nu</A></LI> <LI><em>Sender</em>: <A HREF="mailto:mud-dev-admin#kanga,nu">mud-dev-admin#kanga,nu</A></LI> </UL> <!--X-Head-of-Message-End--> <!--X-Head-Body-Sep-Begin--> <HR> <!--X-Head-Body-Sep-End--> <!--X-Body-of-Message--> <PRE> On 16 May 99,, Caliban Tiresias Darklock wrote: > On 08:42 PM 5/16/99 +0000, I personally witnessed Ross Nicoll jumping up to > say: > > > >The MUD creates as many threads as processors, and then allocates players > >and computer characters in such a way that load on each processor should > >be roughly equal. This should keep context switching to a minimum. > > Maybe I don't understand context switching -- my understanding of threads > is minimal -- but this sounds fallacious. As I understand it, context > switching is when one thread gives way to another thread, which means its > state (context) needs to be saved and the other's has to be restored > (switching). > Yes, but I can't for the life of me figure out why it's so damn important to avoid. ;) 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> -- --* Jon A. Lambert - TychoMUD Email:jlsysinc#ix,netcom.com *-- --* Mud Server Developer's Page <<A HREF="http://pw1.netcom.com/~jlsysinc">http://pw1.netcom.com/~jlsysinc</A>> *-- --* To fight the empire is to be infected by its derangement. Whosoever *-- --* defeats part of the empire becomes the empire; it proliferates like a *-- --* a virus... thereby it becomes its enemies." -- P.K. Dick *-- _______________________________________________ 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> </PRE> <!--X-Body-of-Message-End--> <!--X-MsgBody-End--> <!--X-Follow-Ups--> <HR> <ul compact><li><strong>Follow-Ups</strong>: <ul> <li><strong><A NAME="00337" HREF="msg00337.html">Re: [MUD-Dev] Multi-threaded mud server.</A></strong> <ul compact><li><em>From:</em> Ross Nicoll <rnicoll#lostics,demon.co.uk></li></ul> <li><strong><A NAME="00302" HREF="msg00302.html">Re: [MUD-Dev] Multi-threaded mud server.</A></strong> <ul compact><li><em>From:</em> Jo Dillon <emily#thelonious,new.ox.ac.uk></li></ul> <li><strong><A NAME="00301" HREF="msg00301.html">Re: [MUD-Dev] Multi-threaded mud server.</A></strong> <ul compact><li><em>From:</em> Mik Clarke <mikclrk#ibm,net></li></ul> </UL></LI></UL> <!--X-Follow-Ups-End--> <!--X-References--> <UL><LI><STRONG>References</STRONG>: <UL> <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> </UL></LI></UL> <!--X-References-End--> <!--X-BotPNI--> <UL> <LI>Prev by Date: <STRONG><A HREF="msg00282.html">Re: [MUD-Dev] Multi-threaded mud server.</A></STRONG> </LI> <LI>Next by Date: <STRONG><A HREF="msg00284.html">Re: [MUD-Dev] Multi-threaded mud server.</A></STRONG> </LI> <LI>Prev by thread: <STRONG><A HREF="msg00294.html">Re: [MUD-Dev] Multi-threaded mud server.</A></STRONG> </LI> <LI>Next by thread: <STRONG><A HREF="msg00301.html">Re: [MUD-Dev] Multi-threaded mud server.</A></STRONG> </LI> <LI>Index(es): <UL> <LI><A HREF="index.html#00283"><STRONG>Date</STRONG></A></LI> <LI><A HREF="thread.html#00283"><STRONG>Thread</STRONG></A></LI> </UL> </LI> </UL> <!--X-BotPNI-End--> <!--X-User-Footer--> <!--X-User-Footer-End--> <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> <ul compact> <LI><strong><A NAME="00297" HREF="msg00297.html">Re: [MUD-Dev] Multi-threaded mud server.</A></strong>, Mark Gritter <a href="mailto:mark#erdos,Stanford.EDU">mark#erdos,Stanford.EDU</a>, Tue 18 May 1999, 06:43 GMT </LI> <LI><strong><A NAME="00299" HREF="msg00299.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, 06:45 GMT </LI> </ul> <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> </UL> </LI> </ul> </ul> </LI> </UL></BLOCKQUOTE> </ul> <hr> <center> [ <a href="../">Other Periods</a> | <a href="../../">Other mailing lists</a> | <a href="/search.php3">Search</a> ] </center> <hr> </body> </html>