====== Profiling (Embedded) ======

Notes on profiling embedded systems.

openocd has a profile command, which samples the program counter. Apparently needs latest git version - it's not in release yet.

<blockquote>
Command: ''profile seconds filename [start end]''

Profiling samples the CPU’s program counter as quickly as possible, which is useful for non-intrusive stochastic profiling. Saves up to 1000000 samples in filename using “gmon.out” format. Optional start and end parameters allow to limit the address range.
</blockquote> 

This file can be inspected with gprof.

[[https://ftp.gnu.org/old-gnu/Manuals/gprof-2.9.1/html_mono/gprof.html#SEC4]]