Why Two CPUs in Task Mgr?

F

Frankster

I have two boxes with Hyper Threading CPU's (or whatever! :) )... anyway,
both of these boxes display two CPUs in Task Manager. Neither has two CPUs.
Why?

-Frank
 
N

neo [mvp outlook]

It is because of the HyperThread feature in the Intel CPU.
Hyperthreading - Initially referred to as Simultaneous Multi-threading or
SMT) allows for a single physical processor to appear to the operating
system as two logical processors. The operating system doesn't know the
difference and feeds threads to each as if they were indeed separate
physical processors.)

FWIW, Intel does not recommend Windows 2000 as the operating system of
choice if you wish to use hyperthreading. (Need Windows XP (SP1) or Windows
2003).
 
D

David H. Lipman

Then WHY did you post in a Win2K News Group ?

Dave



| Thank you! Yep, one is an XP box and the other is a 2003 box.
|
| -Frank
|
| | > It is because of the HyperThread feature in the Intel CPU.
| > yperthreading - Initially referred to as Simultaneous Multi-threading or
| > SMT) allows for a single physical processor to appear to the operating
| > system as two logical processors. The operating system doesn't know the
| > difference and feeds threads to each as if they were indeed separate
| > physical processors.)
| >
| > FWIW, Intel does not recommend Windows 2000 as the operating system of
| > choice if you wish to use hyperthreading. (Need Windows XP (SP1) or
| > Windows 2003).
| >
| > | >>I have two boxes with Hyper Threading CPU's (or whatever! :) )... anyway,
| >>both of these boxes display two CPUs in Task Manager. Neither has two
| >>CPUs. Why?
| >>
| >> -Frank
| >>
| >
| >
|
|
 
F

Frankster

Err... I wasn't thanking you for anything!

How 'bout 'cuz... there is no MS 2003 newsgroup and... although there is an
XP newsgroup, I was only aware that this had Hyperthreading in common. Not
OS. Until someone in THIS newsgroup made me aware that the display was
unique to 2003 and XP.

It was HIM that I thanked!

-Frank
 
J

John John

There are no 2003 user groups David. 2003 user post here because 2000 &
2003 are quite similar and they get solid answers from the pros here.

John
 
D

David H. Lipman

Sure. But Frankster said he had XP and when you get down do it, Win2003 server is WinXP
Server, both the successors to Win2k (Workstation and Server).

Now if the Frankster had Win2K I could understand the post. He knew was using XP but,
conveniently left out that "...both of these boxes..." were two different OSs, WinXP and
Win2003 Server.

Actually Win2K, WinXP and Win2003 are similar but WinXP and Win2003 are MORE similar to each
other than either are to Win2K.

Dave



| There are no 2003 user groups David. 2003 user post here because 2000 &
| 2003 are quite similar and they get solid answers from the pros here.
|
| John
|
| David H. Lipman wrote:
|
| > Then WHY did you post in a Win2K News Group ?
| >
| > Dave
| >
| >
| >
| > | > | Thank you! Yep, one is an XP box and the other is a 2003 box.
| > |
| > | -Frank
| > |
| > | | > | > It is because of the HyperThread feature in the Intel CPU.
| > | > yperthreading - Initially referred to as Simultaneous Multi-threading or
| > | > SMT) allows for a single physical processor to appear to the operating
| > | > system as two logical processors. The operating system doesn't know the
| > | > difference and feeds threads to each as if they were indeed separate
| > | > physical processors.)
| > | >
| > | > FWIW, Intel does not recommend Windows 2000 as the operating system of
| > | > choice if you wish to use hyperthreading. (Need Windows XP (SP1) or
| > | > Windows 2003).
| > | >
| > | > | > | >>I have two boxes with Hyper Threading CPU's (or whatever! :) )... anyway,
| > | >>both of these boxes display two CPUs in Task Manager. Neither has two
| > | >>CPUs. Why?
| > | >>
| > | >> -Frank
| > | >>
| > | >
| > | >
| > |
| > |
| >
| >
 
D

David H. Lipman

Frank, it is not "thank yous" I'm interested in, nor what I'm commenting on.

You conveniently left out that "...both of these boxes..." were two different OSs, WinXP and
Win2003 Server.

Dave




| Err... I wasn't thanking you for anything!
|
| How 'bout 'cuz... there is no MS 2003 newsgroup and... although there is an
| XP newsgroup, I was only aware that this had Hyperthreading in common. Not
| OS. Until someone in THIS newsgroup made me aware that the display was
| unique to 2003 and XP.
|
| It was HIM that I thanked!
|
| -Frank
 
J

John John

David said:
... when you get down do it, Win2003 server is WinXP
Server...

We'll let the MVP's and [MSFT] guys comment on that. As far as I am
concerned XP is a mutt bred out of Windows ME and Windows 2000. Also,
as far as I am concerned there is no XP Server.

John
 
D

David H. Lipman

Huh ?

WinME is the final version in a memory model that created the products; Win95, Win98 and
WinME. All 32bit OSs that use 16bit registers to be backward compatble with DOS.

NT 3.5x, NT4, Win2K (Win2K server), WinXP (32 and 64bit) and Win2003 Server (32 and 64bit)
are all NT based OSs and are all in the same memory model family.

In actuallity the family is; NT4, NT5 (Win2K), NT5.1 (WinXP) and NT 5.2 (Win2003).
{ NT3.x has been deliberately left out in the above, but not forgotten }

Dave




| David H. Lipman wrote:
|
| > ... when you get down do it, Win2003 server is WinXP
| > Server...
|
| We'll let the MVP's and [MSFT] guys comment on that. As far as I am
| concerned XP is a mutt bred out of Windows ME and Windows 2000. Also,
| as far as I am concerned there is no XP Server.
|
| John
 
J

John John

You don't have to tell me the difference between W9x and NT, some of the
features in XP were actually tested on ME, system restore for one. In
the NT community XP was a yawn, for the w9x users XP was a stepping stone.

John
 
D

David H. Lipman

All previous OSs are predecessors and all subsequent OSs are successors. Therefore since XP
came after Win2k and WinME, it will have those components that were good and drop those
components that were bad. An obvious and simple progression.

Dave


| You don't have to tell me the difference between W9x and NT, some of the
| features in XP were actually tested on ME, system restore for one. In
| the NT community XP was a yawn, for the w9x users XP was a stepping stone.
|
| John
 
D

Dave

because HT cpu's show up as two separate cpu's in the task manager, they are
separate enough that they can run independently so that is how windows
handles them.
 

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