On 7 May 2010 03:17, Jeff Squyres <jsquy...@cisco.com> wrote: > > Indeed. I have seen some people have HT enabled in the bios just so that > they can have the software option of turning them off via linux -- then you > can run with HT and without it and see what it does to your specific codes.
I may have missed this on the thread, but how do you do that? The Nehalem systems I have came delivered with HT enabled in the BIOS - I know it is not a real pain to reboot and configure, but it would be a lot easir to leave it on and switch off in software - also if you wanted to do back-to-back testing of performance with/without HT.
