Explore transport tunings built using eBPF to enhance network performance and reliability in this Linux Plumbers Conference talk. Examine examples of problems and solutions for both intra-datacenter (small RTT) and inter-region (long RTT) networks. Learn how the BPF attach-point (struct_ops) was utilized to implement a TCP congestion control change aimed at improving network performance. Follow the journey of prototyping and deploying custom congestion control algorithms, and discover how tcp_iter addressed challenges with existing connections and version management. Gain insights into open challenges for the eBPF community based on the speakers' experiences.