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Comparing a 1 ms tick with a 10 ms tick for a set whose shortest period is 5 ms, the 1 ms tick

  • A.makes the set schedulable where the slower tick would not
  • B.gives finer release granularity at more overhead
  • C.is required, a 10 ms tick being unable to release the task at all
  • D.reduces the utilisation of the task set

Answer: B

A five millisecond period cannot be expressed at all in ten millisecond ticks, and one millisecond ticks give five per period with the release jitter that implies. The overhead of ten times as many tick interrupts is what has to be weighed against it.

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