HT is very useful and delivers considerable advantages for compiling and
development workstations. Just be aware that although Linux sees 2
processors, in real terms HT is only equal to about 1.5 processors so set
any application/server configs based on the number of CPU's accordingly.
You can otherwise run into loading issues and temperature problems with the
CPU.
On 1/13/06, Joachim Schrod
Marlier, Ian wrote:
> Yes, enable it if you want to take advantage of it. > However, of late there have been some interesting articles that > suggest that turning hyperthreading *off* may be faster than having > it on.
http://news.zdnet.co.uk/0,39020330,39237341,00.htm
which is linked to from
http://hardware.slashdot.org/article.pl?sid=05/11/19/1358218
Thanks for adding the /. link as well. It has some good comments (if you read at +4, like I do.)
Seems like HT is bad for I/O-dominant workloads that don't take HT into account, and good for workloads with many applications running at the same time that don't thrash the L2 cache.
Joachim
-- =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- Joachim Schrod Email: jschrod@acm.org Roedermark, Germany
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