Pushing the Limits of Linux Kernel Networking (2015)

Good article. A newer one would probably include xdp as well since this was written before xdp was included in common kernels, especially RHEL's

Related reading from Cloudflare regarding linux ports: https://blog.cloudflare.com/how-we-built-spectrum/

HN discussion: https://news.ycombinator.com/item?id=16821807