Date: Wed, 12 Jan 2005 18:29:01 +1300 From: Jonathan Chen <jonc@chen.org.nz> To: Bryan Fullerton <fehwalker@gmail.com> Cc: freebsd-questions@freebsd.org Subject: Re: Hyperthreading hurts 5.3? Message-ID: <20050112052901.GA61033@osiris.chen.org.nz> In-Reply-To: <35de0c30050111210235ea3060@mail.gmail.com> References: <9094-SnapperMsgD246FC56BE0A255B@68.243.126.247> <20050112014359.GA3722@gothmog.gr> <B8CC38DE-6455-11D9-87A5-000D93AD26C8@tntluoma.com> <35de0c30050111210235ea3060@mail.gmail.com>
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On Wed, Jan 12, 2005 at 12:02:37AM -0500, Bryan Fullerton wrote:
> On Tue, 11 Jan 2005 23:52:11 -0500, Timothy Luoma <lists@tntluoma.com> wrote:
> >
> > sorry to be dense, but which should be enough, BIOS or conf file?
> >
> > is the default to use or not use hyperthreading in the kernel/conf?
>
> By default the system will detect a HTT processor, but can only launch
> the second 'virtual' CPU core if you recompile the kernel with the SMP
> option enabled.
Not true on 5.3+ GENERIC systems. If you look at dmesg, you'll see the
second virtual CPU launched as well as the extra column in top(1) if
you enable HTT in the BIOS.
--
Jonathan Chen <jonc@chen.org.nz>
----------------------------------------------------------------------
Jesus saves.
Allah forgives.
Cthulu thinks you'd make a nice sandwich.
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