TMS570LC4357: Need to read RTICLK to Kick the Dog

The technical reference PDF says:

The expiration time of the DWD down counter can be determined with the following equation:
texp = (DWDPRLD + 1) × 213/RTICLK
where
DWDPRLD = 0...4095

How do you read the RTICLK?

If I set a 100 percent window, I don't seem to need a pause of any kind:

    /* Initialize DWD Expiration Period. */
    dwwdInit(rtiREG1, Generate_Reset, 4095, Size_100_Percent);

    // This function will Enable the DWD counter.
    dwdCounterEnable(rtiREG1);

    // 100 percent window
    int count = 0;
    while(1)
    {
        dwdReset(rtiREG1);
        count++;
    }

The reason I am looking for a value for RTICLK is because when I use FreeRTOS and try to "Kick the Dog" from a Task, I get a "EndTime_Window_Violation".

	// main...

    /* Initialize DWD Expiration Period. */
    dwwdInit(rtiREG1, Generate_Reset, 4095, Size_100_Percent);

    // This function will Enable the DWD counter.
    dwdCounterEnable(rtiREG1);

    /* Create Task 1 */
    if (xTaskCreate(vTask1, "Task1", configMINIMAL_STACK_SIZE, NULL, 1, &xTask1Handle) != pdTRUE)
    {
        /* Task could not be created */
        while (1);
    }

void vTask1(void *pvParameters)
{
    while (1)
    {
        vTaskDelay(200 / portTICK_PERIOD_MS);
        dwdReset(rtiREG1);
    }
}