CPU False Sharing

May 2, 2021 · 566 words · 3 min · CPU Cache

The motivation for this post comes from an interview question I was asked: What is CPU false sharing? CPU Cache Let’s start by discussing CPU cache. CPU cache is a type of storage medium introduced to bridge the speed gap between the CPU and main memory. In the pyramid-shaped storage hierarchy, it is located just below CPU registers. Its capacity is much smaller than that of main memory, but its speed can be close to the processor’s frequency.