Win 2000 Pro & Hyper-Threading

[Doug V]

Do I need to do any configuration to enable Hyper-Threading
on my P4 system that will be running Win 2000 Pro?

 

[Jisha]

Yes... turn it off.
You'll see superior performance with it off.

 

[nut cracker]

It is an option in the bios... typically called "logical processor" or
"hyper-threading" and the options are enabled and disabled.

with it on, some applications might benefit from it... however, the
performance of the system will be roughtly 1.3x as fast as a single
processor would be. Depending on what you are doing, performance may
degrade.

NuTs

 

[Bill Crocker]

Although Windows 2000 recognizes Hyperthreading, it does not support it very
well. You would do better to disable it, in your BIOS.

If you run WinXP Pro, or Linux, Hyperthreading will be fully utilized.

Bill Crocker

 

[Silence Seeker]

with it on, some applications might benefit from it... however, the
performance of the system will be roughtly 1.3x as fast as a single
processor would be. Depending on what you are doing, performance may
degrade.

Could you elaborate on this please? Where does the number 1.3x come
from? Performance may degrade up to 1X or below that? What kind of
things I would be doing that could degrade performace? (i.e.
video/photo editing, compiling etc.)

Thanks,
Sam

 

[Bob I]

To simplify, the "hardware design" should provide 30% more thruput due
to more efficient use of resources, BUT due to software interaction you
will likely see less. AND if the "software" in question really has a
problem with multiprocessors you could end up with less proformance than
a 1 processor box. Windows 2000 has NO optimization for HT, it
"believes" there are 2 CPU's and there is where you will likely run into
problems. So "officially" Windows 2000 does not "support" HT and if it
works for you fine, if it doesn't, then disable it. That's the long and
short of it.