Tech
Linux Process Monitoring: From /proc to eBPF
Three generations
Linux process monitoring moved through three generations, and most orgs are
still on generation two while reading alerts from generation three.
Generation
Mechanism
Strengths
Weaknesses
1. /proc polling
read /proc/<pid>/stat every N seconds
trivially portable, no deps
lossy, high overhead at scale, no events
2. ptrace + exec hooks
strace -style attach
precise, per-syscall
stops the world on every syscall, no fleet...
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