Dual core CPUs support for the second time

Scott Long scottl at samsco.org
Tue Dec 27 14:58:04 PST 2005

Tomas Randa wrote:

> Hello again,
> I`d like to thank for all responses, but my testing of everything was 
> unsuccessfull in motherboard I have :(
> I have one general question? Could it be, because I am using this modern 
> motherboard with modern chipset which could be unsupported in FBSD?
> My motherboard is very new SuperMicro H8SSL-i with ServerWorks HT1000 
> chipset, but in his BIOS, there are correctly written 2 cores in 1 
> physical CPU and CPU is recognized as dual core Athlon 64 X2
> What is confusing me is dmesg - for example from current/i386 - system 
> show correctly 2 cores per package, but second CPU is not launched or 
> recognized by ioapic.
> I tried upgrade BIOS with unofficial version, which sent me technical 
> support of SuperMicro, but no change.
> DMESG attached to this message
> Thanks a lot for any help.
> Tomas Randa

I don't see anything in your dmesg about the APIC devices that should be
there.  Did you somehow omit that from your kernel config, or have it
disabled in /boot/loader.conf?  Without the apic device, the other CPU's
can't get started.  Can you run 'acpidump -d -t' and 'mptable'?  Are you
running an i386 or amd64 kernel?


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