[2021] Serving Netflix Video at 400Gbps on FreeBSD - Drew Gallatin

In this talk, I will discuss the efforts to serve TLS encrypted Netflix video at 400Gb/s from a single server. This will be a follow-on to 2 talks at the 2019 EuroBSDCon: “Numa Optimizations in the FreeBSD Network Stack” and “Kernel TLS and TLS Hardware Offload“. I will provide background on the Netflix video workload, and define key technologies such as NUMA, kernel TLS and hardware kTLS. I will describe encountering bottlenecks such as: * Memory bandwidth limits for software kTLS * PCIe issues with hardware kTLS * NUMA for software vs hardware kTLS I will present current and historical performance results from at least: * AMD “Rome” 2nd generation EPYC systems * AMD “Milan” 3rd generation EPYC systems * Ampere Altra arm64 systems Drew Gallatin Drew started working on FreeBSD at Duke in the 90s, and was one of the people behind the FreeBSD/alpha port. He worked on zero-copy TCP optimizations for FreeBSD and was sending data at over 1Gb/s before gigabit Ethernet was generally availa