I went to your homepage. Your gif "Programming in C++" made me really laugh, thanks for that! 8-)

https://rigtorp.se/

This works much better on my POWER9 system. I have two CPUs in my machine with the same core count but different cache configurations according to hwloc and this showed that they really are different.

You need to add a Makefile there. It's just two lines.

See also https://github.com/google/multichase