STM32 Interrupt Latency: Things Killing Your Real-Time Performance.

In this video, we break down interrupt latency — the time between an interrupt event and the first instruction executed inside the ISR. We cover: What actually happens inside the CPU during interrupt entry Context saving and stack operations Vector table lookup How many clock cycles it really takes What affects latency (priority, flash wait states, architecture) How to measure it on real hardware using an STM32F407VG We also discuss baseline latency numbers for ARM Cortex-M4 cores Link to Playlist: https://youtube.com/playlist?list=PLzijHiItASCkVD7fcqMCJ7yRo0lFx6vfU&si=JKk0rLJmXTAIBtE7 SUBSCRIBE FOR MORE! Timestamps: (00:00) Intro (00:22) Definition of Interrupt Latency (02:54) Influence of Architure (03:50) Delays from Prioriy assignement (04:46) Delays from Cache Miss (05:13) Tail Chaining (06:13) Late Arrival My social media handles LinkedIn: www.linkedin.com/in/ebenezer-asabre-0626761aa Facebook: @ebenezer.asabre.56 Link to Playlist: https://www.youtube.com/playlist?list=PLzijHiItASCkVD7fcqMCJ7yRo0lFx6vfU Ebenezer Asabre embstack #embeddedsystems #baremetal #programming #cprogramming