[svlug] Re: Hype or threading?

Jeffrey Siegal jbs at quiotix.com
Thu Jan 2 04:20:28 PST 2003


Ira Abramov wrote:
> no, a kernel that isn't aware of the hyperthreading pairs and treats the
> system as a 4 way SMP would cause L1 cache starvation and the system
> CRAWLES.

Depends on the application.  I've seen as much as a 30% improvement with 
some applications wihtout special kernel support.

Don't assume that HT will help or hurt with your workload -- try it and 
see.




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