Abstract
In hard real time systems, determinism and predictability of time are important aspects that need to be considered in the execution of a given task. It is a well-known fact that the task execution time depends on scheduling latency which in turn depends on the capability of Real Time Operating Systems (RTOS) scheduler. Hence it is clear that scheduling latency is an important parameter of RTOS that specifies its performance. Thus keeping an eye on recently available Real Time Operating Systems, an effort is made in this work to carry out performance comparisons of two real-time operating systems, based on their scheduling latencies. FreeRTOS and ChibiOS/RT deployed onto CORTEX-M3 processors are chosen for this purpose.
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