In low level performance oriented contexts, I've come across references to CPU ports. What is a CPU port and what makes them interesting from a software perspective?
After some trial and error it looks like "CPU execution port" is a much better Google phrase so I have some stuff to read but a 10,000 ft overview would still be helpful.
Two examples:
Intel's IACA reports information on ports:
https://stackoverflow.com/a/26021338/1128289
This talk mentions ports: