Top only showing one active CPU on HTT system

Franco Bruno Borghesi fborghesi at gmail.com
Tue May 24 10:20:48 PDT 2005


I'm curious... doesn't enabling ht make your system run slower? That's what 
I had found searching on google a while ago, and that's why I have never 
enabled ht on my kernels.


2005/5/24, Kirk Strauser <kirk at strauser.com>:
> 
> On Tuesday 24 May 2005 10:59, Tim Kellers wrote:
> 
> > The acpi_load="YES" in /boot/loader.conf might do the trick.
> 
> Actually, it turns out that I have to set machdep.hyperthreading_allowed=1
> for HTT to work now.
> 
> Speaking of which, is that tunable documented anywhere besides the HTT
> security PR? It's not in the 5.4-STABLE /usr/src/UPDATING or anyplace else
> I've looked, so I was more than a bit surprised to find that such an
> important default was changed without much notice. I imagine a lot of
> people read the PR much as I did: "blah, blah, theoretical, doesn't affect
> me, next message"...
> --
> Kirk Strauser
> 
> 
>


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