Multiprocessors and degraded performance running XP
Whilst investigating the problem above I discovered the following "hotfix"
in the Microsoft Knowledge Base regarding Multiprocessors and degraded performance running XP.
http://support.microsoft.com/kb/896256
On the website click on 256986 (http://support.microsoft.com/kb/256986/) Description of the Microsoft Windows registry.
This will give better detail.
The installation of this fix should only be installed if you are comfortable with manipulating "the registry"!
I have installed it on a test machine and am trying to figure out how to properly benchmark and evaluate it.
Bill.