Cpus : fix or replace py-cpuinfo to get the number of hard CPUs / sockets on a multi socket machine

[bpetit]

Problem / Use case

We use py-cpuinfo which apparently doesn't make a difference between mono socket and multi socket MB

Solution

We could either find another lib, or create a PR for py-cpuinfo to fix this.

[benjaminlebigot]

Hey, Do you think that lstopo (hwloc) could do the job ?

[bpetit]

Maybe ! Did you test it on multi socket machines ?

[benjaminlebigot]

By myself ? Nope but it looks like it does the job : https://www.open-mpi.org/projects/hwloc/ | https://linux.die.net/man/7/hwloc

If you have a use case or a machine with an ssh connection having multii-sockets on its motherboard, I can test it for you, it is really not complicated/long to do.

Tell me if you have some time to spend/to discuss about this point and the needs for the agent, I would gladly contribute to such issue.

PS : this link supposes that you can clearly ask specific information from a list of sockets https://iq.opengenus.org/hwloc-in-linux/

[benjaminlebigot]

Hi @bpetit,

I started to work on the contribution on py-cpuinfo in order to retrieve the socket_count.

Here is the current pull request: workhorsy/py-cpuinfo#172
I will update the /hardware/cpu/cpu.py once the pull request is accepted.

[benjaminlebigot]

Since we don't have any answer from the MR below, I added a function to get the nb of socket in the hardware/cpu.py file
You can find this work on the add_socket_number branch.

I will start an MR