Efficient use of vTaskList and vTaskGetRunTimeStats

[HitecSmartHome]

Hello guys!

I want to gather data about my tasks into a JsonDocument with ArduinoJson.
The problem I'm facing is that vTaskList and vTaskGetRunTimeStats does not provide any struct or usable variables to retrive information.

My thiking would be something like this

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//retrive vTaskList into a struct or something
task_list_struct taskInfos = getTaskList();
// Add info to a JsonDocument
JsonDocument taskInfo;
taskInfo["name"] = taskInfos.name;

Or it would be even better if we got an interable list of task infos or something.

This works:

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char taskListBuff[2048] = {0};
char taskRunTimeStatsBuff[2048] = {0};
vTaskList(taskListBuff);
vTaskGetRunTimeStats(taskRunTimeStatsBuff);
printf("vTaskList: %s\n", taskListBuff);
printf("vTaskGetRunTimeStats: %s\n", taskRunTimeStatsBuff);

But it is not efficient. I don't want to print it, I want to send it.

Does anyone know how to do that? How does vTaskList and vTaskGetRunTimeStats gets the data?

[boarchuz]

https://www.freertos.org/uxTaskGetSystemState.html

[HitecSmartHome]

I solved it eventually

Code: Select all

void TaskInfo::get() {
    UBaseType_t uxArraySize;
    TaskStatus_t *taskStatusArray;
    uint32_t ulTotalRunTime,ulStatsAsPercentage;
    uxArraySize = uxTaskGetNumberOfTasks();
    taskStatusArray = (TaskStatus_t *)pvPortMalloc(uxArraySize * sizeof(TaskStatus_t));
    if (taskStatusArray != NULL) {
        uxArraySize = uxTaskGetSystemState(taskStatusArray, uxArraySize, &ulTotalRunTime);
        ulTotalRunTime /= 100UL;

        for (UBaseType_t i = 0; i < uxArraySize; i++) {
            ulStatsAsPercentage = taskStatusArray[i].ulRunTimeCounter / ulTotalRunTime;
            printf("Name: %s\n",taskStatusArray[i].pcTaskName);
            printf("Run time percentage: %d\n",ulStatsAsPercentage);
        }

        vPortFree(taskStatusArray);
    }
}

This method prints out all the task names and run time in percentages compared to the global runtime.