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<DIV><FONT face=Arial size=2>Firstly, if you follow convention, the process
that displays the rendered images is called the client, and the other processes
are the servers. This is because the client asks a server to do some work
for it, no matter the relative number of processes. Really, your client
(the renderer with work it needs done) should connect to multiple servers... not
the other way around.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Question: do you really mean 650 kilobits per
frame, or do you mean kilobytes? 512*384*4 = 768KB. While it's not
impossible to compress that to 650Kb (about 83KB), using something
like JPEG, it would probably take quite a lot of time to do that
compression. There's a big difference. After doing some calculation,
I think you could only achieve about 20fps on a 100Mbps ethernet with 650KB
frames.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Tim</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<BLOCKQUOTE
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=jacco.bikker@overloaded.com
href="mailto:jacco.bikker@overloaded.com">Jacco Bikker</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=enet-discuss@cubik.org
href="mailto:enet-discuss@cubik.org">enet-discuss@cubik.org</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Wednesday, February 02, 2005 2:44
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> [ENet-discuss] Large data
packets over ENet</DIV>
<DIV><BR></DIV>
<DIV class=Section1>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Hello,<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">I am writing a ray tracer that
renders at interactive frame rates on a single machine (2Ghz, 5fps). To
advance to realtime performance, I am trying to use several computers to
render the image. I tried using winsock/UDP, but I lack the knowledge to
properly implement this, and the result was disappointing for anything above 2
clients.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">So I tried Enet. Implementation
was a breeze, but performance is somewhat disappointing. Perhaps I am doing
something wrong, so let me explain what I do:<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal
style="MARGIN-LEFT: 0.5in; TEXT-INDENT: -0.25in; mso-list: l0 level1 lfo1"><![if !supportLists]><FONT
face=Arial size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><SPAN
style="mso-list: Ignore">-<FONT face="Times New Roman" size=1><SPAN
style="FONT: 7pt 'Times New Roman'">
</SPAN></FONT></SPAN></SPAN></FONT><![endif]><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">The server accepts incoming
clients.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal
style="MARGIN-LEFT: 0.5in; TEXT-INDENT: -0.25in; mso-list: l0 level1 lfo1"><![if !supportLists]><FONT
face=Arial size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><SPAN
style="mso-list: Ignore">-<FONT face="Times New Roman" size=1><SPAN
style="FONT: 7pt 'Times New Roman'">
</SPAN></FONT></SPAN></SPAN></FONT><![endif]><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">Once at least one client is
available, the server sends a ‘go’ packet to each client. This packet contains
information about which lines the client should
render.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal
style="MARGIN-LEFT: 0.5in; TEXT-INDENT: -0.25in; mso-list: l0 level1 lfo1"><![if !supportLists]><FONT
face=Arial size=2><SPAN style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><SPAN
style="mso-list: Ignore">-<FONT face="Times New Roman" size=1><SPAN
style="FONT: 7pt 'Times New Roman'">
</SPAN></FONT></SPAN></SPAN></FONT><![endif]><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">The client receives this
information, starts rendering, and returns the result to the
server.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">The maximum amount of returned
pixel data is 512x384 pixels (32bit). This is about 650Kb per frame. Using
Enet, performance is significantly better (but still disappointing) if I
compress the data. Does Enet have problems with large data streams? Is there a
way to optimize this?<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: Arial">-
Jacco.<o:p></o:p></SPAN></FONT></P></DIV>
<P>
<HR>
<P></P>_______________________________________________<BR>ENet-discuss mailing
list<BR>ENet-discuss@cubik.org<BR>http://lists.cubik.org/mailman/listinfo/enet-discuss<BR></BLOCKQUOTE></BODY></HTML>