no hyperthreading in FreeBSD 9?

Marco Beishuizen mbeis at
Sat Jan 14 10:02:50 UTC 2012

On Fri, 13 Jan 2012, the wise Mark Blackman wrote:

> On 13 Jan 2012, at 16:30, Marco Beishuizen wrote:
>> Hi,
>> I just upgraded from 8-STABLE to 9-STABLE on my dual Xeon (nocona). Now I have in my boot messages:
>> ...
>> root: /etc/rc.d/sysctl: WARNING: sysctl machdep.hlt_logical_cpus does not exist.
>> root: /etc/rc.d/sysctl: WARNING: sysctl machdep.hyperthreading_allowed does not exist.
>> ...
>> So isn't hyperthreading not available anymore in FreeBSD 9?
> Seems to imply HT is enabled by default and new sysctls are used to take
> logical CPUs offline.
> How many CPUs does your boot message suggest FreeBSD 9 is reporting?

Yeah, I just deleted the lines from sysctl.conf and it doesn't seem to 
make a difference at all (2 cpu's x 2 threads).

Who on earth would eat a charred caterpillar!?
No, no, you SINGE 'em!  You SINGE 'em and eat 'em!

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