• State TI Thinks Resolved
  • Locked Locked
  • Replies 3 replies
  • Answers 1 answer
  • Subscribers 34 subscribers
  • Views 154 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

Original question:

AM263P4-Q1: Get runtime in microsec order

AM263P4-Q1: TaskP_loadGet() Higher priority task

Mari Tsunoda
Expert 5726 points

Part Number: AM263P4-Q1

Tool/software:

Hi Team,

This question is a continuation from the related thread.

My customer wants to know if they use TaskP_loadGet(), will the higher priority tasks also be computed in the CPU load?

Best regards,

Mari Tsunoda

  • 0
    TI__Mastermind 25313 points

    Hi Mari,

    Thank you for your patience while we assigned the correct owner here. Please allow some time for them to review and provide feedback.

    Best Regards,

    Zackary Fleenor

  • 0
    TI__Mastermind 19212 points

    Hi,

    If you want to compute the load for a specific task, you can use: TaskP_loadGet(). If you want to compute the total CPU Load, use: TaskP_loadGetTotalCpuLoad().

    TaskP_loadGet() only calculates the CPU load for a specific task passed to it via the TaskP_Object *obj. It does not account for other tasks (higher or lower priority).

    So if a higher-priority task is running frequently, it will:
    - Preempt the current task, reducing its accumulated runtime (accRunTime)
    - But that higher-priority task’s load won’t be included in the TaskP_loadGet() result unless that specific task’s handle is passed in.
    - Returns the individual task's runtime as a percentage of the total system runtime
    - The calculation is: taskLoad->cpuLoad = TaskP_calcCpuLoad(taskObj->accRunTime, gTaskP_ctrl.accTotalTime)

    Instead you can use TaskP_loadGetTotalCpuLoad(), to check overall CPU utilization which includes all the higher priority tasks as well.

    - Returns the percentage of CPU time spent on all tasks except the idle task(s)
    - The calculation is: cpuLoad = TaskP_LOAD_CPU_LOAD_SCALE - TaskP_calcCpuLoad(idleTaskTime, gTaskP_ctrl.accTotalTime)
    - This function subtracts the idle task's CPU usage from 100% to get the total CPU load

    Regards,
    Shaunak