finding CPU count - reading sysinfo output

Linux and Unix-Like Red Hat
1

Hello,
sysinfo throws out below 3 CPU counts. Can anyone help me understand what each of these means?

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.

1 Like
3

Thanks Corona688. These are indeed Intel CPUs - Xeon E5630. Looking at the manufacturer's product spec, they do have 8 threads:
ARK | Intel� Xeon� Processor E5640 (12M Cache, 2.66 GHz, 5.86 GT/s Intel� QPI)

Regards
Harsha