Page-Fault?

The software-based solutions to cache coherency are something that puzzled me even after the lecture. I looked it up and found some solutions that optimize compilation such that coherence issues are avoided. This is hard to do, and often results in poor cache utilization because the compiler will take conservative decisions. We now see why hardware-based snooping mechanisms are the most popular.

Reference: https://www.ques10.com/p/13222/what-is-cache-coherence-problem-and-how-it-can-b-1/