Date: Wed, 29 Oct 2003 23:14:12 +0100 From: Sven Pfeifer <sven@yagonna.de> To: freebsd-newbies@freebsd.org Subject: Re: Hyperthreading in FreeBSD 4.9 Message-ID: <20031029221412.GA7984@yagonna.de> In-Reply-To: <Law15-F113zn3HZsaJ0000434b7@hotmail.com> References: <Law15-F113zn3HZsaJ0000434b7@hotmail.com>
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Hi,
John Palmer <drgnut@hotmail.com> wrote:
> I currently have FreeBSD 4.8 with hyperthreading enabled. I just did a
> cvsup to FreeBSD 4.9 and when I do a make buildkernel KERNCONF=FOO I get
> an error of unknown option "HTT". Has hyperthreading been disabled in
> FreeBSD 4.9?
did you read
/usr/src/UPDATING
---8<--
20031022:
Support for HyperThread logical CPUs has now been enabled by
default. As a result, the HTT kernel option no longer exists.
Instead, the logical CPUs are always started so that they can
handle interrupts. However, the extra logical CPUs are prevented
from executing user processes by default. To enable the logical
CPUs, change the value of the machdep.hlt_logical_cpus from 1 to
0. This value can also be set from the loader as a tunable of
the same name.
-->8---
HTH
Cheers
Sven
--
"640 kB RAM should be enough for everyone" --Bill Gates, 1981
------------------------------------------------------[rand. sig. #27]
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