Task priorities are fundamental to multi-tasking kernels that employ priority based preemptive scheduling. Task priorities characterize the task behavior and the dynamics of the system as a whole. The following concepts of priority apply to Tics; other systems may vary.
Priorities are not a panacea, and should be used wisely and sparingly if at all. It has been our experience that most real-time systems perform adequately with the cooperative approach. For those situations where priorities are needed, we recommend running only 1 task at high priority and others at default priority if possible. We recommend against many levels of priorities. Keep your application simple and predictable. Lastly we recommend heavy stress testing especially in critical real-time systems.
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