Understanding RT by graphics

A lot of people seem not to understand very well what real-time means.
They usually tend to think RT has anything to do with performance and
the raw throughput. It doesn’t. It’s all about determinism and guarantees.

This post’s title has “by graphics” words. I think the graphics below
are worth a thousand words. I obtained them while porting the RT tree to
Freescale boards some weeks ago at ProFUSION. Basically I’m running a
task that wakes up every 40ms, run a tiny job, send some numbers through
the network and sleeps again. The time in …