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Task manager shows 4 instead 2 processors

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Carlos Secades
Occasional Advisor

Task manager shows 4 instead 2 processors


Hi,

I have installed windows 2000 server (SP4) on a Proliant ML370 G3 Server with 2 Intel Xeon 2.8 GHz.

When I go to Task Manager on the Performance Tab I'm really surprised because I saw 4 CPU usage window instead of 2.

Do you know why?
Is there any way to correct that?

Thanks in advance
Regards
CARLOS
6 REPLIES
SAKET_5
Honored Contributor
Solution

Re: Task manager shows 4 instead 2 processors

Hi CARLOS,

Most likely you have Hyperthreading enabled on the CPUs. This is the default configuration on Proliant ML370 G3 and a few newer ones too. Intel Hyperthreading in very brief represents one CPU into two logical CPUs to the operating system in your case Win2k Server. As you have two physical CPUs (both hyperthreaded) hence you see (2*2)4 CPUs in the task manager. This is not a problem, in fact Win2kServer is capable of symmetric multiprocessing (SMP), hence it will make good use of this excellent feature thus may giving a boost to your server performance.

You could enable or disable the Hyperthreading option by pressing "F9" for RBSU during system boot up. YOu should see an option for it there.

Let me know if you need more information on Hyperthreading and I could forward you some real good articles from Intel on Hyperthreading.

Hope this solves your problem:)

P.S.Don't forget to assign points:))

Regards
Carlos Secades
Occasional Advisor

Re: Task manager shows 4 instead 2 processors

Thanks a lot for oyur anwer.

Could you please send me these articles?
I'm interested to read it

thanks
CARLOS
SAKET_5
Honored Contributor

Re: Task manager shows 4 instead 2 processors

Hi CARLOS,

A few great articles which clearly explain Intel Hyperthreading here:
http://www.intel.com/technology/hyperthread/

On the right hand side, look into "White Papers". You would probably find more than you need.

Let me know if you have any problems:)

Have fun reading.

Ciao
SAKET_5
Honored Contributor

Re: Task manager shows 4 instead 2 processors

Hi CARLOS,

A basic overview on Intel Hyperthreading and support matrix also available at the following link:
http://www.intel.com/products/ht/hyperthreading_more.htm

Hope this was of help and don't forget to assign points:)

Ciao
Darrenrd
Advisor

Re: Task manager shows 4 instead 2 processors

Hi, Carlos
This is because the processors are hyper-threading processors.. emulates 2 as 4 proc..

Live life like there is no tomorrow
Vijay_44
Honored Contributor

Re: Task manager shows 4 instead 2 processors

Here is some more information on HP's site

http://h18000.www1.hp.com/products/servers/technology/hyper-threading.html
There’s your problem!!! This thing is set to EVIL!