To study how chips really work, MIT researchers built their own operating system (opens in new tab)

A fascinating novel approach by researchers at MIT, called Fractal, to study in-depth how processors actually work. A team at MIT’s Computer Science and Artificial Intelligence Laboratory (CSAIL) decided to build something different. Fractal, an operating system kernel written from the ground up, treats the hardware itself as the object of study. Its first major use, a deep look at branch predictors — a CPU’s way of guessing what code to run next, before it knows for certain, so it doesn’t ha...