And, with the security issues, and minimal performance help, it's probably a good idea to just disable HT anyways

http://www.daemonology.net/hyperthreading-considered-harmful/

Ian Cunningham wrote:
Vineet,

As far as your operating system is concerned you have 2 cpus. The bios presents it to the os this way and it is the way hyperthreading works. Yes, its annoying. The only way to change the outcome is to turn off hyperthreading.

Ian

Vineet Agarwal wrote:

Hi Everyone,

I have a question.

All the machines I have are single CPU.

On some clusters the number of CPU shown are actually double.

Eg: One cluster has 5 machines, it displays “Hosts up: 5” and “10 cpu total”

Any clue why this strange behavior.

Is it becoz of hyperthreading, coz it shows up to linux as cpu0 and cpu1..

Thanks,

Vineet Agarwal



--
Paul Greidanus
CAD Administrator / Systems Administrator
Center of Excellence in Integrated Nanotools    University of Alberta
[EMAIL PROTECTED]                       780-492-7368
http://www.cein.ualberta.ca


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