Gives you a rough idea of how the Xtensa cores are utilized.
Works by attaching idle hooks and measuring how often they get called.
The core usage is calculated: usage% = idle ticks since last measurement / expected idle ticks if core were idle * 100%.
The expected idle tick count was measured by running an empty program.
- Should only be used for user information, not in logic that needs accurate values
- New IDF versions could optimize performance and therefore introduce an error to usage estimation.
- When one core is at 100% the other might report a negative value
- Download component into
<project_dir>/components/ #include "esp32_perfmon.h"- Call
perfmon_start()once