Tag Archives: priority

Celebrating 10 years – my top 10 blog articles

Glennan Carnie

Technical Consultant at Feabhas Ltd
Glennan is an embedded systems and software engineer with over 20 years experience, mostly in high-integrity systems for the defence and aerospace industry.

He specialises in C++, UML, software modelling, Systems Engineering and process development.
Glennan Carnie

Latest posts by Glennan Carnie (see all)

It’s difficult to believe we’ve been writing articles for 10 years.  In that time I’ve written over 90 technical articles on C, C++ and embedded system design.

To celebrate I’ve picked my ‘Top 10’ articles, with a little background into why I enjoyed writing them so much, or the story behind them.

So, sit back, cue up “At the Sign of the Swinging Cymbal“* and enjoy.

 

(* This really dates

Posted in C/C++ Programming, Design Issues, Testing, UML | Tagged , , , , , , , | Leave a comment

Debunking priority

Glennan Carnie

Technical Consultant at Feabhas Ltd
Glennan is an embedded systems and software engineer with over 20 years experience, mostly in high-integrity systems for the defence and aerospace industry.

He specialises in C++, UML, software modelling, Systems Engineering and process development.
Glennan Carnie

Latest posts by Glennan Carnie (see all)

Before I start, a disclaimer:

For the purposes of this article I’m limiting the discussion to even-driven systems on priority-based, pre-emptive operating systems, on single processors.

I’m using the word task to mean ‘unit of execution’ or ‘unit of schedulability’, in preference to thread or process. I’m ignoring the different OS memory models.

There seems to be a fair amount of misunderstanding about the concept of priority in concurrent programming:

Priority means one task is more ’important’ than another.
Priority allows one task to […]

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