Re: IBM T60 dmsg 6.1-RC1 (problems will test patches)

From: Alexander Leidinger <Alexander_at_Leidinger.net>
Date: Wed, 19 Apr 2006 20:35:00 +0200
Am Wed, 19 Apr 2006 07:28:51 -0400
schrieb John Baldwin <jhb_at_freebsd.org>:

> On Wednesday 19 April 2006 01:22 pm, Benjamin Adams wrote:
> > I don't think the kernel is using dual core corrently. 6.0 and 7.0 did
> > not reconize my acpi_bus for my hard drive.
> > Also built in Wireless is not detected, Maybe other problems?
> 
> Aside from the wireless it all looks (mostly) ok to me.
> 
> > FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs
> >  cpu0 (BSP): APIC ID:  0
> >  cpu1 (AP): APIC ID:  1
> 
> These are your two cores, though FreeBSD thinks they are HTT instead
> of dual cores for some reason.  You can toggle the 
> 'machdep.hyperthreading_allowed' sysctl to make the kernel schedule
> threads onto the second core though.

This is because Intel wants the Dual-Core to work with Windows XP. They
(and AMD) decided to change the semantic of the HTT bits. A summary of
a german article about this is at
   http://lists.freebsd.org/pipermail/cvs-all/2006-April/166131.html

Feel free to ask for some specific details, I will translate those
parts then.

Bye,
Alexander.

-- 
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http://www.Leidinger.net                       Alexander _at_ Leidinger.net
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Received on Wed Apr 19 2006 - 16:34:48 UTC

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