December 2015
Beginner to intermediate
418 pages
10h 1m
English
Content preview from Mastering Embedded Linux ProgrammingBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Identifying the sources of non-determinism
Fundamentally, real-time programming is about making sure that the threads controlling the output in real-time are scheduled when needed and so can complete the job before the deadline. Anything that prevents this is a problem. Here are some problem areas:
- Scheduling: Real-time threads must be scheduled before others so they must have a real-time policy,
SCHED_FIFO, orSCHED_RR. Additionally they should have priorities assigned in descending order starting with the one with the shortest deadline, according to the theory of Rate Monotonic Analysis that I described in Chapter 10, Learning About Processes and Threads. - Scheduling latency: The kernel must be able to reschedule as soon as an event such as an ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.