Listing CPU Cores For Multiple CPU Packages

Question

I need to get CPU cores and details per CPU core. I use cat /proc/cpuinfo command an it works. But I need to get information for multiple CPU packages. I have only single CPU package. How would the output look like in this situation?

Example CPU setup: 2 CPU packages: CPU package1: Core i7-2000 (4 physical, 8 logical cores), CPU package2: Core i7-3000 (4 physical, 8 logical cores), total 8 physical, 16 logical cores.

Example 1:

processor   : 0
.   other info for same core
model name  : Intel(R) Core(TM) i7-2000
.
.   other cores for same CPU package
.
processor   : 7
.   other info for same core
model name  : Intel(R) Core(TM) i7-2000
.
processor   : 8
.   other info for same core
model name  : Intel(R) Core(TM) i7-3000
.
.   other cores for same CPU package
.
processor   : 15
.   other info for same core
model name  : Intel(R) Core(TM) i7-3000

or Example 2:

processor   : 0
.   other info for same core
model name  : Intel(R) Core(TM) i7-2000
.
.   other cores for same CPU package
.
processor   : 7
.   other info for same core
model name  : Intel(R) Core(TM) i7-2000
.
processor   : 0
.   other info for same core
model name  : Intel(R) Core(TM) i7-3000
.
.   other cores for same CPU package
.
processor   : 7
.   other info for same core
model name  : Intel(R) Core(TM) i7-3000


OS: Debian-like Linux, Kernel: 4.19

Answer 1

In setups with multiple physical CPU packages, you won’t see varying model names — all the CPUs have to be matched. In most cases I would expect the enumeration order in /proc/cpuinfo to go over physical packages in order, but that can’t be guaranteed; what you need to do is look at the physical id in /proc/cpuinfo if you want to group the logical cores by physical socket. All the cores from a single socket will have the same physical id, and only those cores.