How does XP handle a dual xeon with hyperthread?

[Anthony Ewell]

Hi All,

I am building a dual Xeon, multi boot system with
Windows XP and several other OS's. One of the OS's
supports as many processors as you want to throw at it.
So, I would like to leave my Hyperthread turned on in bios.

On a dual Xeon motherboard with Hyperthread turned on,
how does XP handle the two extra processors?
It would be a real bummer if XP's two processor block
used both virtual processors off the same physical
processor and ignored the second physical processor!

Many thanks,
--Tony
(e-mail address removed)

 

[D.Currie]

Hi All,

I am building a dual Xeon, multi boot system with
Windows XP and several other OS's. One of the OS's
supports as many processors as you want to throw at it.
So, I would like to leave my Hyperthread turned on in bios.

On a dual Xeon motherboard with Hyperthread turned on,
how does XP handle the two extra processors?
It would be a real bummer if XP's two processor block
used both virtual processors off the same physical
processor and ignored the second physical processor!

Many thanks,
--Tony
(e-mail address removed)

With pro, you'll see four processors. XP understands the difference between
physical and virtual processors.

 

[Anthony Ewell]

With pro, you'll see four processors. XP understands the difference between
physical and virtual processors.

Better than I thought! Thank you.

Question, one of the other OS's is W2k-Pro. Do you
know if w2k-pro acts the same way as XP?

Many thanks,
--tony
(e-mail address removed)

 

[Alex Nichol]

I am building a dual Xeon, multi boot system with
Windows XP and several other OS's. One of the OS's
supports as many processors as you want to throw at it.
So, I would like to leave my Hyperthread turned on in bios.

On a dual Xeon motherboard with Hyperthread turned on,
how does XP handle the two extra processors?
It would be a real bummer if XP's two processor block
used both virtual processors off the same physical
processor and ignored the second physical processor!

XP CPU limit (one in Home, two in Pro) refers to chips; each can be
Hyperthreaded to behave as two effective processors. So Pro will get
all of your machine available