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How do you test RTOS performance?
- RTOS performance tests are developed for common features available in any RTOS.
- The benchmark suite used in this experiment is the Thread Metric Benchmark Suite that consists of eight tests.
- The calibration test is the first test in this suite which is performed to ensure that the platform of the test operates in a similar manner.
- The next five tests are Cooperative Scheduling, Preemptive Scheduling, Memory Allocation, Synchronization Processing (Semaphores), and Message Passing.
- Each test is run for 30-second intervals, providing the value accumulated in a counter as the result.
- To get a reasonable comparison, each RTOS must be configured in a way that makes it fair.
- Each RTOS has unique features and configurations that must be accounted for an accurate comparison.
- The tests were performed on three popular open-source RTOSes - Zephyr RTOS, FreeRTOS, and Eclipse ThreadX - and one commercial RTOS - PX5 RTOS.
- The results of the experiment provided a feel for how the differentiating features might perform for each RTOS.
- Engineers can use the data gathered from the experiment to make the right design decisions and ensure that they don't leave any much-needed performance on the table.
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