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Embedded & Firmware · 1st Edition · January 2026
RTOS Internals: FreeRTOS and Zephyr Compared
Schedulers, IPC, and the design choices behind your kernel
4.7(76 ratings)
intermediate
268 pages
If your team is choosing an RTOS or trying to migrate between them, this is the book to read first. We walk through scheduler internals, tickless idle, memory protection regions, and the IPC primitives that affect determinism. Includes timing measurements taken on identical hardware with both kernels, so your decision is based on numbers rather than vibes.
Author
Lior Hadar
Embedded Systems Architect
Lior has brought up custom silicon for medical devices, satellites, and the kind of low-volume industrial gear that never appears on a Hacker News front page. He writes for engineers who own an oscilloscope.
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Specifications
- Pages
- 268
- Edition
- 1st Edition
- Language
- English
- Level
- intermediate
- ISBN
- 978-1-99999-008-1
- Published
- January 2026
Editorial review
Reviewed by three working engineers at peer publications before publication. We do not publish first drafts.
Table of contents
What you'll find inside.
- 01Why Compare These Two
- 02The Scheduler Loop
- 03Tickless Idle and Power
- 04Memory Protection Regions
- 05Queue, Mutex, Event Group
- 06Driver Models
- 07Footprint and Bring-up Cost
- 08Migration Recipes
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