Messages in this thread | | | Date | Fri, 25 Oct 2002 11:20:23 -0700 | From | chrisl@vmware ... | Subject | Re: How to get number of physical CPU in linux from user space? |
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On Fri, Oct 25, 2002 at 01:27:00AM -0700, Martin J. Bligh wrote: > Define "physical CPU number" ;-) If you want to deteact which
I mean the number of cpu chip you can count on the mother board.
> ones are paired up, I believe that if all but the last bit > of the apicid is the same, they're siblings. You might have to > dig the apicid out of the bootlog if the cpuinfo stuff doesn't > tell you.
And you are right. Those apicid, after mask out the siblings, are put in phys_cpu_id[] array in kernel.
I think about look at bootlog too, but that is not a reliable way because bootlog might already been flush out after some time.
Cheers
Chris
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