The first paragraph of the article makes it very clear what they’re referring to: > Whatever machine you’re reading this on, it’s highly likely that not all of

The first paragraph of the article makes it very clear what they’re referring to: > Whatever machine you’re reading this on, it’s highly likely that not all of the CPUs shown by the OS are actually physical processors. That’s because most modern processors use simultaneous multithreading (SMT) to improve performance by executing tasks in parallel.