Commits on Jul 16, 2024

1. chore(ebpf): optimize filldir64 program …

   The filldir64 program runs very frequently, and as such incurs great
   overhead. However, its usecase only requires the submission of events
   from pid 0 inodes. Since this filter is faster than scope evaluation,
   the condition check is moved before program data initialization and
   scope evaluation.
   
   Optimization reduces the average runtime to ~18% of the previous
   overhead. Note, that even for more run amounts, the overall runtime is
   now 27% from the previous version.
   
   Before:
   PROGRAM: filldir64 (type: kprobe, runtime: 61047110 ns, amount: 53135 times, average: 1148 ns)
   After:
   PROGRAM: filldir64 (type: kprobe, runtime: 16507056 ns, amount: 80350 times, average: 205 ns)

   

   NDStrahilevitz committed Jul 16, 2024
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