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Date: Wed, 12 Jan 2005 14:58:49 -0500
From: Bryan Fullerton <fehwalker@gmail.com>
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References: <9094-SnapperMsgD246FC56BE0A255B@68.243.126.247>
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Subject: Re: Hyperthreading hurts 5.3?
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On Wed, 12 Jan 2005 18:29:01 +1300, Jonathan Chen <jonc@chen.org.nz> wrote:
> On Wed, Jan 12, 2005 at 12:02:37AM -0500, Bryan Fullerton wrote:
> > 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.

You are incorrect. There is no SMP option in the 5.3-R i386 GENERIC
config file as distributed.

Other platforms (sparc64 and alpha) do ship with SMP enabled by
default. They're not using HTT, though, so are irrelevant to this
discussion.

Bryan