SMP with hyperthreading CPU (5.3)?

Ewald Jenisch a at jenisch.at
Tue Nov 2 01:25:10 PST 2004


On Sat, Oct 30, 2004 at 01:43:09PM -0700, Luke wrote:
> I haven't updated my system since August, but back then the "apic" device 
> was also required.  5.3 may be different.
> This is the relevant section from my 5.2-CURRENT hyperthreading kernel 
> from last August.
> 
> # To make an SMP kernel, the next two are needed
> options         SMP             # Symmetric MultiProcessor Kernel
> device          apic            # I/O APIC
> 

Sorry, forgot to say, that I've got both of them in my kernel config
file, i.e. "SMP" and "apic" - however I don't get the characteristic
"CPU... launched" messages upon boot.

This brings me to another point: What's the best way (besides checking
/var/log/messages) to tell whether SMP is active?

Does "top" display cpu load for hyperthreading (as opposed to
multiprocessor) systems too?

-ewald




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