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Re: SMP with ACPI disabled



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Greg Madden wrote:
[[snip]]
> 
> I don't have an answer.I thought ACPI was for power management, esp
> laptops, a heavily used server doesn't seem to me to need power
> management. I have a smp PIII Gz that gives me fits, IRQ allocation on
> the pci slots. This is a APIC issue, and the easiest solution was not
> to use certain cards in the box.
> 
> Is that two cpu's with hyperthreading or two core duo cpu's?
> 
> 
> 

Greetings:

ACPI does a lot more than just power management.  It handles PCI routing
setup and much of the initial hardware setup and discovery.

As to the original topic of what happened to the other two cores, the
local APICs that are being discovered and configured by ACPI are
required for multiple CPUs to be used.  The answer to is it possible to
work around is dependent on you motherboard, and all evidence points to no.

http://www.adriansrojakpot.com/Speed_Demonz/New_BIOS_Guide/APIC_Function.htm
has a more detailed explanation.

- -Scott
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