eBPF (Extended Berkeley Packet Filter) is a powerful tool embedded in the Linux kernel offering low-overhead, real-time visibility into system and network activity. It enhances observability by executing sandboxed programs within the kernel, allowing system operators to monitor events like system calls and network packets without significant performance penalties. Examples of eBPF usage in large-scale environments include LinkedIn for infrastructure monitoring, Apple for enhanced security, and Netflix for network traffic analysis. eBPF also supports fine-grained security policies and Kubernetes cluster monitoring, providing essential insights without extra instrumentation.
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