At 02:52 PM 10/28/2003 +0100, Inaki Castillo wrote:
I have been checking a driver on a Hyperthreading machine (one physical
CPU) and have found the following strange results:
- The best performance of my driver is achieved when I disable
HyperThreading from BIOS (that is, no hyperthreding at all)- Second best is when I use the flag /ONECPU in BOOT.INI.
- The worst, by far, is when I use HypertHreading and two logical CPUs.
You don’t mention which OS this is on, but I did come across an article on
the MS web site a while back that mentions that HT is only properly
supported in XP and later (I assume this means 2003 server). They recommend
turning it off on all previous OS’s (including W2K).
Russ Poffenberger
NPTest, Inc.
xxxxx@NPTest.com