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Subject: Re: How can we manage performance problems?
From: Linus Nielsen Feltzing (linus_at_haxx.se)
Date: 2002-11-03


Quoting Andreas Zwirtes <zwirtes_at_gmx.de>:
> From what I know, priority ceiling multithreading adresses problems
> like this exactly. With a high priority disk access and decoding, it
> wouldn't be possible to interrupt the playback. Since the implementation
> of real OSEK multithreading is very challenging, it is possible to use
> ready made (and certified) solutions for microcontrollers. Correct me if
> I'm wrong, please.

There is a reason for having such a simple scheduler that we have today, and that is because we want things simple. Adding priorities and even preemptive scheduling is something we definitely want to avoid, since it buys us a shitload of new problems.

/Linus



Page was last modified "Jan 10 2012" The Rockbox Crew
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