ACPI Uniprocessor & ACPI Multiprocessor

[Guest]

Can I use ACPI Multiprocessor component to uni-processor machine?

I made XPE image with 'ACPI Uniprocessor PC' and setup on intel
uni-processor PC. However, the intel processor supports hyper-threading
tech., so my XPE image tried to set up multiprocessor PC files.
So I copied several files for multiprocessor PC from XP pro, and then my XPE
completed setting up 'ACPI Multiprocessor PC' successfully - the taskmanager
showed two processor.
After all these task, I tried to turn off hyper threading option from BIOS,
and then, the taskmanager showed one processor, but ACPI multiprocessor PC'
is still installed.

Anyone give me some information deffernce about ACPI component?

 

[Slobodan Brcin \(eMVP\)]

David,

Multiprocessor kernel work on both single and multiprocessor machines.
Idea for existence of single processor kernel could be explained in reduced
number of checks required to be done by certain critical kernel functions.
So in theory it should work faster if you use single processor machine for
comparison.

Regards,
Slobodan

 

[KM]

David,

I agree with Slobodan. The Multiprocessor kernel should work on single processor (and it did work for me) however performance wise
you would want to switch to singleprocessor kernel there.
Anyway, if you want to do that "dynamically" just include both kernels (copy binaries of missing kernel to your runtime) and set up
boot.ini switches to use the right kernel wherever you need to.

--
Regards,
KM, BSquare Corp.

David,

Multiprocessor kernel work on both single and multiprocessor machines.
Idea for existence of single processor kernel could be explained in reduced
number of checks required to be done by certain critical kernel functions.
So in theory it should work faster if you use single processor machine for
comparison.

Regards,
Slobodan