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These blogs concern the design of embedded systems that must meet deadlines, or else!

How to Prioritize RTOS Tasks (and Why It Matters)

Presented by Barr Group Principal Engineer Salomon Singer, this webinar examines best practices for assigning fixed priorities to a set of real-time operating systems (RTOS) tasks and interrupt service routines (ISRs). Viewers will learn how and why to use optimal methods to allow a critical set of tasks and interrupt service routines to meet all of their deadlines – even during transient overload periods. Lessons learned can be applied to the development of any priority-based preemptive RTOS, including real-time Linux.

Introduction to Rate Monotonic Scheduling

If you've got a lot of real-time tasks and tight deadlines, what's the best way to prioritize them? A technique called RMA guides the way.

The scheduling algorithm you choose depends on your goals. Different algorithms yield different results. Let's suppose you're given ten jobs and each will take a day to finish. In ten days, you will have all of them done. But what if one or more has a deadline? If the ninth task given to you has a deadline in three days, then doing the tasks in the order you receive them will cause you to miss that deadline.

How to Allocate Dynamic Memory Safely

Whether you're using only static memory, a simple stack, or dynamic allocation on a heap, you have to proceed cautiously. Embedded programmers can't afford to ignore the risks inherent in memory utilization.

Every program uses random access memory (RAM), but the ways in which that memory is divided among the needy parts of the system varies widely. This article surveys the options available in hopes that the reader will be better equipped to choose an approach for a given project.

How to Have Polymorphism Without a Heap

Rethinking basic programming techniques can avoid many of the problems that heap-based memory management poses for embedded real-time system designs.

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