While an interesting read, the title is a bit misleading since I didn’t see any actual “test results” in the post.

AMD’s documentation for the CPU may or may not state such things as “There are six integer ALUs, four address generation units, three branch units, four vector ALUs, and two vector read/write units”, but even if it does, Agnes Fog runs actual code to check that, and often discovers corner cases that the official documentation doesn’t mention.

So, he black box tests the CPU to try and discover its innards.

They are linked at the bottom of Mr. Fog's post. For example on page 142 of this:

https://www.agner.org/optimize/instruction_tables.pdf

The detailed results are in the links at the bottom of the post.