Date: Tue, 8 Jul 2003 10:10:14 -0700 (PDT) From: Tom Samplonius <tom@sdf.com> To: John Baldwin <jhb@FreeBSD.org> Cc: Lukas Ertl <l.ertl@univie.ac.at> Subject: Re: HTT on single CPU? Message-ID: <Pine.BSF.4.05.10307081008120.18941-100000@misery.sdf.com> In-Reply-To: <XFMail.20030708131344.jhb@FreeBSD.org>
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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
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