Dual 2.40ghz xeon w/hyperthreading

[jeev]

Yea, box will have a lot of load going through it, nothing small, I found
machdep.cpu_idle_hlt: 0 , im going to take people's recommendation and shut
off hyperthreading.

j

-----Original Message-----
From: Petri Helenius [mailto:pete at he.iki.fi] 
Sent: Friday, April 25, 2003 9:37 AM
To: jeev
Cc: freebsd-smp at freebsd.org
Subject: Re: Dual 2.40ghz xeon w/hyperthreading



>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