[THIN] Re: Hyperthreading

Yes I actually linked to that in my follow on.

To me it confuses matters worse as it seems to indicate that the only
reason a 4-Way Server won't see the additional logical processors is
due to the CPU License Limit in Standard vs Enterprise Server.

But it doesn't really provide an example of what happens on Dual CPU
HT's.  Until it gives the example on the .net (Wk23) server at the
end.

Still leaves the issue a little vague really.



----- Original Message -----
From: Jim Kenzig http://thethin.net <jimkenz@xxxxxxxxxxxxxx>
Date: Thu, 30 Sep 2004 10:23:50 -0700 (PDT)
Subject: [THIN] Re: Hyperthreading
To: thin@xxxxxxxxxxxxx


Hmm did you see the link for Microsoft about using HT on Windows
Servers on that page?
http://download.microsoft.com/download/e/2/3/e239dd00-9ae1-41a9-bb3f-c01f658d16b1/hyperthreading.doc
 
JK

Thin Fan <thinfan@xxxxxxxxx> wrote:


Those links from Intel were for Desktop Processors though. There is a
seperate information page for Xeon HT's for servers.

Xeon Information: http://www.intel.com/design/Xeon/

Very interesting discussion though. Personally I have not disabled HT
on those Xeon Servers that we support.

Even on our latest VM Servers I have left it on as VMWare ESX 2.x now
can see "HT". Whether it actually utilizes HT is another question.


----- Original Message -----
From: Jim Kenzig http://thethin.net 
Date: Thu, 30 Sep 2004 07:06:52 -0700 (PDT)
Subject: [THIN] Re: Hyperthreading
To: thin@xxxxxxxxxxxxx


See
http://www.2cpu.com/articles/42_1.html
http://thethin.net/faqs2.cfm?id=444&category=1&sortby=score
Leave it off for Win2K!
http://thethin.net/faqs2.cfm?id=443&category=1&sortby=score

Regards,
Jim Kenzig
http://thin.net


Bob wrote:
Has anybody experimented with Hyperthreading On -vs- Off on Win2k
servers? I've heard rumblings that it can be problematic, and perhaps
decrease performance. I noticed that most SpecInt. winners have it
disabled. I'm considering disabling it on one of my farm servers to
observe the results. If anybody else has experimented I'd love to
hear about it.

Thanks in advance,
Bob
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