Hyperthreading degrades performance?

[Aniruddha Bohra]

Justin R. Smith wrote:

>This is in reply to the people who said this because of
>cache-contention. Has anyone benchmarked this?
>  
>
See the following :
Evaluating the Impact of Simultaneous Multithreading on Network Servers 
Using Real Hardware
Yaoping Ruan, Vivek S. Pai, Erich Nahum, and John Tracey
/Proceedings of the 2005 ACM SIGMETRICS International Conference on 
Measurement & Modeling of Computer Systems (SIGMETRICS '05)

http://www.cs.princeton.edu/~yruan/XeonSMT/smt.pdf

They have an excellent discussion for a web server

Cheers
Aniruddha

/