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<DIV><FONT face=Arial size=2>You seem to have your self confused about dual
cores there.</FONT></DIV>
<DIV><FONT face=Arial size=2>Also all AMD MB's support HyperTransport as its the
core</FONT></DIV>
<DIV><FONT face=Arial size=2>interface. To what extent its used to NUMA /
interlacing does</FONT></DIV>
<DIV><FONT face=Arial size=2>vary however but most OS's aren't NUMA aware so it
does little</FONT></DIV>
<DIV><FONT face=Arial size=2>or no good.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Our mainstay server is a dual 275's which
present 4 * 2.2Ghz</FONT></DIV>
<DIV><FONT face=Arial size=2>AMD 64 processors enabling them to run a serious
about of</FONT></DIV>
<DIV><FONT face=Arial size=2>servers e.g. 4 * 64 player BF2
servers.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2> Steve / K</FONT></DIV>
<BLOCKQUOTE dir=ltr
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=defilm@acm.org href="mailto:defilm@acm.org">Mark J. DeFilippis</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=cod@icculus.org
href="mailto:cod@icculus.org">cod@icculus.org</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Sunday, October 30, 2005 12:41
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [cod] Linux beta server
problems</DIV>
<DIV><BR></DIV><FONT size=3>Yes, Sorry. I was rushing for dinner, and thanks
for making the corrections.<BR><BR>Indeed, the Tyans are of course are a
HyperTrasport MOBO. The CPU's are Dual Core Opterons,<BR>hence 8 CPU's, and do
not support HyperThreading as you correctly stated.<BR>(Although this would
make the Opteron a bit more practical for the client side if it did, as dual
core<BR>don't do much for the client side as you know. This shows up as 8
CPU's. (Not to mention that the<BR>client side application would have to
support the dual core processor and I don't see that happening<BR>any time
soon, which is not to say it won't.<BR><BR>The DUal Intel P4 is
HypterThreading, and the Intel based MOBO's do not support
HyperTransport<BR>as you correctly point out. This of course, as you pointed
out shows up as 4 CPU's, 2 which are of<BR>course real, the other two are
virtual. :)<BR><BR>However, I will say this much for the 3.2 P4 Xeon
HyperThread procs, using 2.4 with 2.6SMP yields<BR>much better results in
processor thread scheduling than it did on 2.3 with the SMP kernel.<BR>So nice
gain on the same hardware by just upgrading from 2.3 to 2.4 with 2.6SMP... If
anyone<BR>is running this out there and 2.4 with 2.6SMP is an option, go for
it. You WILL notice.<BR><BR>As much as I admit the Tyan HyperTransport
motherboard with Dual Opteron's is a<BR>powerhouse, it is not my private
gaming machine for me and my boys ;-) It is a<BR>work machine, (but I
have fun stuff running on it, and I won't give it back ever) :)<BR><BR>I
widely use it to do Queuing, modeling, and modeling of stochastic processes
I<BR>am a high speed transport network architect by trade. This chews up
tons of CPU.<BR>Some of the models with data collected would run several days
if it were not for this puppy.<BR>But when it is not doing work, it is all
mine. :)<BR><BR>(As a side note, honestly the logical CPU of the
HyperTransport board based Opteron does<BR>not yield the same performance as
the primary processor. So although real<BR>and logical, it at times behaves
virtual. Where if I had 8 real processors in a<BR>grid, I could truly
schedule processes in multiple ways to the processors. Don't<BR>get the
ability with the Dual core Opterons.<BR><BR>Thanks for the
corrections.<BR><BR>Mark<BR><BR><BR>At 05:59 PM 10/29/2005, you wrote:<BR><BR>
<BLOCKQUOTE class=cite cite="" type="cite">I think you're mistaken, as this
is a HyperTransport board, not Hyperthreading (hyperthreading is an Intel
technology, HyperTransport is an AMD technology.. and they are very
different techs at that). They aren't virtual cpus, but logical
cpus.<BR><BR>Intel P4/Xeons use Hyperthreading (which show up as logical
cpus as well).<BR>Opteron based boards are HyperTransport, and dont support
Hyperthreading.<BR><BR>It sounds like you have 4 dual core processors (so
you have a total of 8 Logical, but very real processors). Very nice rig..
Wish it were mine :)<BR><BR>A Quad Dual Core Xeon would show up w/ 16
logical processors (8 very real processors and 8 very virtual hyperthreading
units).<BR><BR>Just don't want anyone getting
confused!</FONT></BLOCKQUOTE><X-SIGSEP>
<P></X-SIGSEP><TT>S1,-------------------------------------------------------------------------------<BR>Mark
J. DeFilippis, Ph. D EE
defilm@acm.org<BR>
defilm@ieee.org<BR><BR><BR></TT></P></BLOCKQUOTE><br>================================================<br>
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