Answer by Rupinderjit for How do Real Time Operating Systems work?
In RTOSes the most critical parameters which should be taken care of are lower latencies and time determinism. Which it pleasantly does by following certain policies and tricks.Whereas in GPOSes, along...
View ArticleAnswer by Jonathan Cline IEEE for How do Real Time Operating Systems work?
"Basically, you have to code each "task" in the RTOS such that they will terminate in a finite time."This is actually correct. The RTOS will have a system tick defined by the architecture, say 10...
View ArticleAnswer by JustJeff for How do Real Time Operating Systems work?
They actually don't guarantee meeting deadlines; what they do that makes them truly RTOS is to provide the means to recognize and deal with deadline overruns. 'Hard' RT systems generally are those...
View ArticleAnswer by terry for How do Real Time Operating Systems work?
The textbook/interview answer is "deterministic pre-emption". The system is guaranteed to transfer control within a bounded period of time if a higher priority process is ready to run (in the ready...
View ArticleAnswer by robert.berger for How do Real Time Operating Systems work?
... well ...A real-time operating system tries to be deterministic and meet deadlines, but it all depends on the way you write your application. You can make a RTOS very non real-time if you don't know...
View ArticleAnswer by RBerteig for How do Real Time Operating Systems work?
You might find it helpful to read the source of a typical RTOS. There are several open-source examples out there, and the following yielded links in a little bit of quick searching:FreeRTOSeCosA...
View ArticleAnswer by Benoit for How do Real Time Operating Systems work?
Meeting deadlines is a function of the application you write. The RTOS simply provides facilities that help you with meeting deadlines. You could also program on "bare metal" (w/o a RTOS) in a big main...
View ArticleAnswer by Adam Hawes for How do Real Time Operating Systems work?
Your RTOS is designed in such a way that it can guarantee timings for important events, like hardware interrupt handling and waking up sleeping processes exactly when they need to be.This exact timing...
View ArticleAnswer by ChrisW for How do Real Time Operating Systems work?
I haven't used an RTOS, but I think this is how they work.There's a difference between "hard real time" and "soft real time". You can write real-time applications on a non-RTOS like Windows, but...
View ArticleAnswer by mouviciel for How do Real Time Operating Systems work?
What is important is realtime applications, not realtime OS. Usually realtime applications are predictable: many tests, inspections, WCET analysis, proofs, ... have been performed which show that...
View ArticleAnswer by Spence for How do Real Time Operating Systems work?
Basically, you have to code each "task" in the RTOS such that they will terminate in a finite time.Additionally your kernel would allocate specific amounts of time to each task, in an attempt to...
View ArticleAnswer by Sesh for How do Real Time Operating Systems work?
It is not that they are able to meet deadlines, it is rather that they have deadlines fixed whereas in a regular OS there is no such deadline.In a regular OS the task scheduler is not really strict....
View ArticleHow do Real Time Operating Systems work?
I mean how and why are realtime OSes able to meet deadlines without ever missing them? Or is this just a myth (that they do not miss deadlines)? How are they different from any regular OS and what...
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