feat: add cpu socket count in cpu.topology

[AhmedGrati]

Resolves #1383

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[AhmedGrati]

/cc @marquiz

[PiotrProkop]

if we don't want to mount /proc to the NFD worker we can also read socket_id from sysfs example:

cat /sys/devices/system/cpu/cpu0/topology/physical_package_id

[marquiz]

Thanks for working on this @AhmedGrati.

Instead of grepping /proc/cpuinfo (and mounting /proc from the host) we should get the information from sysfs. For example, iterate over cpu devices and read their topology/physical_package_id. Number of unique ids is the number of sockets. I think we already loop over all cpus when checking for smt so we should be able to hook the new functionality there.

[AhmedGrati]

Thanks @marquiz @PiotrProkop. PTAL.

[marquiz]

/milestone v0.15

[marquiz]

👍 Two suggestions below

[marquiz]

Thanks @AhmedGrati 👍

We can add the label later if there is high demand for that

[marquiz]

/assign @ArangoGutierrez

[ArangoGutierrez]

/lgtm

[k8s-ci-robot]

LGTM label has been added.

Git tree hash: 20e7fc46e64c7cb531f6bb1afa85c19e88d6d15b

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: AhmedGrati, ArangoGutierrez, marquiz

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[codecov]

Codecov Report

Merging #1497 (ebb0836) into master (794630f) will increase coverage by 0.56%.
Report is 24 commits behind head on master.
The diff coverage is 0.00%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1497      +/-   ##
==========================================
+ Coverage   30.66%   31.23%   +0.56%     
==========================================
  Files          58       59       +1     
  Lines        7571     7671     +100     
==========================================
+ Hits         2322     2396      +74     
- Misses       4998     5025      +27     
+ Partials      251      250       -1     

Files	Coverage Δ
source/cpu/cpu.go	24.41% <0.00%> (-3.11%)	⬇️

... and 11 files with indirect coverage changes