Linux 6.15 Git Tanked Nginx HTTPS Web Server Performance
a year ago
- #Linux
- #Performance
- #Nginx
- Linux 6.15 kernel testing revealed a significant performance regression affecting the Nginx HTTP(S) web server.
- Testing was conducted on a custom 4U server with an AMD EPYC 9655 processor (96 cores/192 threads, 384MB cache, 400W TDP).
- Linux 6.15 showed improvements in some areas (e.g., Llama.cpp, RocksDB, Schbench) but regressions in others, notably Nginx, OpenJDK Java (DaCapo), and OpenFOAM.
- The most severe regression was observed in Nginx's HTTPS web server performance.
- A bisect was performed using the AMD EPYC Zen 5 server to identify the cause of the regression.