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Date: Tue, 8 Jul 2003 10:10:14 -0700 (PDT)
From: Tom Samplonius <tom@sdf.com>
To: John Baldwin <jhb@FreeBSD.org>
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cc: Lukas Ertl <l.ertl@univie.ac.at>
Subject: Re: HTT on single CPU?
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On Tue, 8 Jul 2003, John Baldwin wrote:

...
> > I would need to look a second time, but there is no such BIOS option, and
> > "options HTT" was nuked in 5.1, replaced by machdep.hlt_logical_cpus,
> > which I don't have on my system.
> 
> You need to enable SMP and APIC_IO in your kernel to use HTT.  Also,
> the BIOS setting probably won't make a difference.

  Well, not all P4 CPUs are capable of HyperThreading.  It has to be
fairly new.  Plus, only certain motherboard chipsets seem capable of
supporting HyperThreading.  I would suspect that the BIOS has no
HyperThreading options, it probably doesn't even support it.

> -- 
> 
> John Baldwin <jhb@FreeBSD.org>  <><  http://www.FreeBSD.org/~jhb/
> "Power Users Use the Power to Serve!"  -  http://www.FreeBSD.org/
> _______________________________________________


Tom