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<H1>[MUD-Dev] Re: [Tech] socket slowdown solved</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: [Tech] socket slowdown solved </LI>
<LI><em>From</em>: J C Lawrence &lt;<A HREF="mailto:claw#kanga,nu">claw#kanga,nu</A>&gt;</LI>
<LI><em>Date</em>: Wed, 14 Oct 1998 23:02:43 -0700</LI>
<LI><em>Reply-To</em>: <A HREF="mailto:mud-dev#kanga,nu">mud-dev#kanga,nu</A></LI>
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<PRE>
On Tue, 13 Oct 1998 23:26:06 -0600 
Chris Gray&lt;cg#ami-cg,GraySage.Edmonton.AB.CA&gt; wrote:

&gt; Back in August (I was checking the archives), under the thread
&gt; "Ethernet NICS, maximum connections..mud testing", I had indicated a
&gt; performance problem I was having with communication between my
&gt; server and client, when running on the same Linux machine. Very
&gt; little of the CPU time was used, but there was no explanation for
&gt; the slowdown.
...
&gt; ...I came across the
&gt; TCP_NODELAY option to setsockopt for the TCP protocol layer. Since
&gt; the work stuff is UDP, not TCP, that was no help, but I decided to
&gt; try it on my test client and server. Voila! Drastic improvement in
&gt; performance. 

Stevens of course has a nice bit to say about this in his TCP/IP books
(I'd quote but my copies are at work and I'm not).  Vic Metcalfe's
"Programming UNIX Sockets in C - Frequently Asked Questions" also
covers this area, its strictures, the relevant and affecting RFC's,
and implementation concerns fairly well.  Among a great many other
places you can find the FAQ at:

  <A  HREF="http://www.softlab.ntua.gr/unix/unix-socket-faq/unix-socket-faq.html">http://www.softlab.ntua.gr/unix/unix-socket-faq/unix-socket-faq.html</A>

With most of the good stuff from question 2.11 thru 2.17, starting at:

  <A  HREF="http://www.softlab.ntua.gr/unix/unix-socket-faq/unix-socket-faq-2.html">http://www.softlab.ntua.gr/unix/unix-socket-faq/unix-socket-faq-2.html</A>

Aside: I found the (brief) discussion of out-of-band data streams in
those sections and later questions (cf 5.8) useful for my musings on
error-tolerant protocol designs.

&gt; Now I can get on with real work on my MUD!

Good show!  

-- 
J C Lawrence                               Internet: claw#kanga,nu
----------(*)                             Internet: coder#kanga,nu
...Honourary Member of Clan McFud -- Teamer's Avenging Monolith...


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<LI><STRONG><A NAME="00196" HREF="msg00196.html">[MUD-Dev] [Tech] socket slowdown solved</A></STRONG>
<UL><LI><EM>From:</EM> Chris Gray &lt;cg#ami-cg,GraySage.Edmonton.AB.CA&gt;</LI></UL></LI>
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<ul><li>Thread context:
<BLOCKQUOTE><UL>
<LI><STRONG>[MUD-Dev] Re: Trusting the Client (Re: Laws of Online World  D esign)</STRONG>, <EM>(continued)</EM>
<ul compact>
<ul compact>
<ul compact>
<ul compact>
<LI><strong><A NAME="00260" HREF="msg00260.html">[MUD-Dev] Re: Trusting the Client (Re: Laws of Online World  D esign)</A></strong>, 
Vadim Tkachenko <a href="mailto:vt#freehold,crocodile.org">vt#freehold,crocodile.org</a>, Tue 20 Oct 1998, 03:31 GMT
<UL>
<LI><strong><A NAME="00262" HREF="msg00262.html">[MUD-Dev] Re: Trusting the Client (Re: Laws of Online World</A></strong>, 
Jon A. Lambert <a href="mailto:jlsysinc#ix,netcom.com">jlsysinc#ix,netcom.com</a>, Tue 20 Oct 1998, 04:37 GMT
</LI>
<LI><strong><A NAME="00274" HREF="msg00274.html">[MUD-Dev] Re: Trusting the Client (Re: Laws of Online World  D esign)</A></strong>, 
Steve Sparks <a href="mailto:ssparks#enigma,sss.org">ssparks#enigma,sss.org</a>, Tue 20 Oct 1998, 17:09 GMT
</LI>
</UL>
</LI>
</ul>
</ul>
</ul>
</ul>
</LI>
<LI><strong><A NAME="00196" HREF="msg00196.html">[MUD-Dev] [Tech] socket slowdown solved</A></strong>, 
Chris Gray <a href="mailto:cg#ami-cg,GraySage.Edmonton.AB.CA">cg#ami-cg,GraySage.Edmonton.AB.CA</a>, Wed 14 Oct 1998, 05:25 GMT
<UL>
<LI><strong><A NAME="00216" HREF="msg00216.html">[MUD-Dev] Re: [Tech] socket slowdown solved</A></strong>, 
J C Lawrence <a href="mailto:claw#kanga,nu">claw#kanga,nu</a>, Thu 15 Oct 1998, 06:02 GMT
</LI>
</UL>
</LI>
<LI><strong><A NAME="00192" HREF="msg00192.html">[MUD-Dev] Re: Trusting the Client (Re: Laws of Online World Design)</A></strong>, 
Koster, Raph <a href="mailto:rkoster#origin,ea.com">rkoster#origin,ea.com</a>, Tue 13 Oct 1998, 23:14 GMT
<UL>
<li>&lt;Possible follow-up(s)&gt;<br>
<LI><strong><A NAME="00194" HREF="msg00194.html">[MUD-Dev] Re: Trusting the Client (Re: Laws of Online World Design)</A></strong>, 
Chris Gray <a href="mailto:cg#ami-cg,GraySage.Edmonton.AB.CA">cg#ami-cg,GraySage.Edmonton.AB.CA</a>, Wed 14 Oct 1998, 01:41 GMT
<UL>
<LI><strong><A NAME="00202" HREF="msg00202.html">[MUD-Dev] Re: Trusting the Client (Re: Laws of Online World Design)</A></strong>, 
J C Lawrence <a href="mailto:claw#under,engr.sgi.com">claw#under,engr.sgi.com</a>, Wed 14 Oct 1998, 17:32 GMT
<UL>
<LI><strong><A NAME="00205" HREF="msg00205.html">[MUD-Dev] Re: Trusting the Client (Re: Laws of Online World Design)</A></strong>, 
Jon Leonard <a href="mailto:jleonard#divcom,slimy.com">jleonard#divcom,slimy.com</a>, Wed 14 Oct 1998, 19:21 GMT
</LI>
</UL>
</LI>
</UL>
</LI>
</UL>
</LI>
</UL></BLOCKQUOTE>

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