finding CPU count - reading sysinfo output


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# 1  
finding CPU count - reading sysinfo output

Hello,
sysinfo throws out below 3 CPU counts. Can anyone help me understand what each of these means?
Code:
CPU Count Socketed is           2
CPU Count Physical is           8
CPU Count Virtual is            16

First one seems obvious. However, I wonder how there can be 8 Physical CPUs, if only two were socketed? Does it mean each CPU has 4 cores? No clue about Virtual CPUs though.
I couln't find much info on sysinfo man page nor on the web. If there exist any pages, do point me to such.

Thanks
Harsha Hegde
# 2  
You can have more than one core in a CPU these days. Quad-core means you'll have four per chip.

I'm guessing these are intel CPU's? Hyperthreading will act like 16 virtual CPU's, but it's still 8 really.
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