Discussion
Comparing a kernel's advertised latency figures with what an application will see, the application's figure is usually
Answer: B
Correct answer: worse, because of critical sections in the application itself
A kernel quotes the latency of its own paths, measured with nothing else disabling interrupts. In a real application the drivers and the application code have critical sections of their own, and the worst case is the longest of them added to the kernel’s figure. The published number is a floor, not a prediction.
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