Python multiprocessing doesn't seem to use more than one core

Question

I want to use Python multiprocessing to run grid search for a predictive model. When I look at core usage, it always seem to be using only one core. Any idea what I\'m doing wro

Answer 1

According to the documentation the join() command locks the current thread until the specified thread returns. So you are basically starting each thread in the for loop and then wait for it to finish, BEFORE you proceed to the next iteration.

I would suggest moving the joins outside the loop!