Date: Sat, 13 Mar 2004 17:48:52 +0100 From: Alex de Kruijff <freebsd@akruijff.dds.nl> To: a@jenisch.at Cc: freebsd-questions@freebsd.org Subject: Re: SMP vs. Hyperthreading? Message-ID: <20040313164852.GA981@alex.lan> In-Reply-To: <20040313133737.GA21068@athena.oekb.co.at> References: <20040313133737.GA21068@athena.oekb.co.at>
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On Sat, Mar 13, 2004 at 02:37:37PM +0100, a@jenisch.at wrote:
> Hi,
>
> I've got a machine with a P4 that supports HTT (Hyperthreading) so I
> thought about setting up a SMP-kernel.
>
> Under 4.9 it seems to work (see excerpts from /var/log/messages
> below), whereas on the same exact hardware under 5.2.1 I don't see two
> virtual CPUs working.
>
> For a first check I've run "cpuburn" (i.e. burnP6). Under 4.9 with one
> "cpuburn" process active "top" etc. show a cpu-load of about 50% which
> for me means SMP/HTT is active.
>
> Under 5.2.1 it's a different story though: /var/log/messages shows
> that there are 2 CPUs but the message indicating the second CPU has
> been launched is missing ("/kernel: SMP: AP CPU #1 Launched!"). When I
> run a "cpuburn"-Test under 5.2.1 CPU load indicated by "top" shows
> 100% so I assume SMP/HTT is not active.
>
>
> So my primary question is - how do I get SMP running under 5.2.1 with
> a hyperthreading-capable P4??
I installed 5.2 and that came ready to run afther the install. I didn't
have to do anything for it.
--
Alex
Articles based on solutions that I use:
http://www.kruijff.org/alex/index.php?dir=docs/FreeBSD/
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