Status of hyperthreading in FreeBSD

Wojciech Puchar wojtek at
Sat Dec 20 21:40:19 UTC 2008

> "Netbooks" based on Intel's "Atom" microprocessor are turning into big hits 
> this Christmas season. The Atom, a super-low-power x86 processor, is an 
> "in-order" machine, which means that except for a few special cases it can 
> spend a lot of time waiting for data to arrive when it encounters a cache 
> miss. So, hyperthreading may make sense on this kind of processor as compared 
> to one with out-of-order execution.
> Which raises a question: What's the status of FreeBSD's support for 
> hyperthreading?
for FreeBSD it's just like 2 processors.

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