#eBPF

A deep Kubernetes and Linux networking guide to sidecarless service meshes: how eBPF socket-level redirection (sockops) and Istio Ambient Mesh eliminate the 20-40% CPU/RAM sidecar tax, bypass the TCP/IP stack for local traffic, and deliver zero-overhead mTLS and L7 observability.

A deep systems engineering guide to Linux kernel-bypass networking: why the standard Linux network stack caps out at high packet rates, the internal architecture of eXpress Data Path (XDP), action codes (XDP_DROP, XDP_TX, XDP_REDIRECT), zero-copy user-space networking with AF_XDP (XSK), and building a line-rate DDoS firewall in C.