Predictive CPU isolation of containers at Netflix

We've all had noisy neighbors at one point in our life. Whether it's at a cafe or through a wall of an apartment, it is always disruptive. The need for good manners in shared spaces turns out to be important not just for people, but for your Docker containers too. When you're running in the cloud your containers are in a shared space; in particular they share the CPU's memory hierarchy of the host instance. Because microprocessors are so fast, computer architecture design has evolved towards adding various levels of caching between compute units and the main memory, in order to hide the latency of bringing the bits to the brains.