Simultaneous Multithreading (SMT)

Simultaneous multithreading is the process of a CPU splitting each of its physical cores into virtual cores, which are known as threads.

• Increase performances and allow each core to run two instruction streams at once

https://www.tomshardware.com/reviews/simultaneous-multithreading-definition,5762.html

Also ran into the term hyper-threading learning Eigen: https://eigen.tuxfamily.org/dox/TopicMultiThreading.html