It sounds like you've uncovered some significant performance bottlenecks in your system using eBPF (Extended Berkeley Packet Filters), which is a powerful tool for tracing and monitoring Linux systems at the kernel level. Here's a summary of what you discovered:
-
Dynamic Library Loading Overhead:
- You were loading dynamic plugins on every request, causing the dynamic linker to perform extensive file system operations like
stat(),open(), andmmap()for each plugin. - This resulted in significant kernel time consumption (37ms of kernel time per 2ms reported by userspace profilers).
- Solution: Cache loaded plugins to avoid redundant loading on every request.
- You were loading dynamic plugins on every request, causing the dynamic linker to perform extensive file system operations like
-
TCP Retransmissions:
- You traced TCP retransmissions and found a high number of retransmits (847 per second) for one specific connection.
- This was due to incorrect TCP window size tuning, buffer overflow in the high-throughput path, and issues specific to an AWS availability zone.
- Solution: Adjusted TCP window scaling, which reduced retransmissions by 99.2% and improved latency.
-
Filesystem Operations:
- You were able
Read the full article at DEV Community
Want to create content about this topic? Use Nemati AI tools to generate articles, social posts, and more.

![[AINews] The Unreasonable Effectiveness of Closing the Loop](/_next/image?url=https%3A%2F%2Fmedia.nemati.ai%2Fmedia%2Fblog%2Fimages%2Farticles%2F600e22851bc7453b.webp&w=3840&q=75)



