Dual 2.40ghz xeon w/hyperthreading

Petri Helenius pete at he.iki.fi
Fri Apr 25 09:36:56 PDT 2003



>Which would give me the best performance? To disable hyperthreading or
>enable machdep.cpu_idle_hlt, and if I were to enable it, it would be from
>loader.conf or?

If you have significant interrupt / syscall load, disable hyperthreading. If most
of your work is in userland, go for idle_hlt. Someone also mentioned that
current has gotten better in this regard, I haven´t tested that yet.

Pete



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