Real-time operating system (RTOS) vendors often make claims of “fast real-time performance,” and “rapid real-time response,” to convince developers to use their RTOS for a given application. The implication is that “faster is better,” and sub-microsecond interrupt response and context switch times are offered as compelling evidence.
Given that “real-time performance” is often cited by developers as paramount in their list of criteria for selection of an RTOS, it’s easy to see why OS vendors respond to this demand for performance with measurements designed to show that their RTOS is faster than the competition, and therefore better. Developers are encouraged to choose an RTOS with low overhead or risk missing the performance requirements of their application.
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