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How can you reduce CPU load caused by frequent tick interrupts in FreeRTOS?

hard📝 Application Q9 of 15
FreeRTOS - RTOS Fundamentals
How can you reduce CPU load caused by frequent tick interrupts in FreeRTOS?
ADecrease configTICK_RATE_HZ to lower tick frequency.
BIncrease task priorities arbitrarily.
CDisable the scheduler during idle periods.
DUse vTaskDelay(0) in all tasks.
Step-by-Step Solution
Solution:

  1. Step 1: Understand tick interrupt frequency impact

    Higher tick rate means more frequent interrupts, increasing CPU load.

  2. Step 2: Adjust configTICK_RATE_HZ

    Lowering configTICK_RATE_HZ reduces interrupt frequency and CPU load.

  3. Final Answer:

    Decrease configTICK_RATE_HZ to lower tick frequency. -> Option A

  4. Quick Check:

    Lower tick rate reduces CPU load [OK]
Quick Trick: Lower tick rate to reduce CPU interrupt overhead [OK]
Common Mistakes:
  • Increasing priorities does not reduce tick interrupts
  • Disabling scheduler stops all task switching
  • vTaskDelay(0) does not reduce tick interrupts

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