CCS/PROCESSOR-SDK-AM437X: 1ms Timer issue

Part Number: PROCESSOR-SDK-AM437X

Tool/software: Code Composer Studio

I have set up a 1ms timer on my AM437x IDK, but it does not seem to be working correctly. I have a print statement that is supposed to print out every 5 seconds, but instead it is am printing every 5.9 seconds.

I have my Initialization as follows:

void Clock::Initialize()
{
    Timer_Params timerParams;
    Timer_Params_init(&timerParams);
    timerParams.period = 1000; /* 1 ms */
    Timer_create(Timer_ANY, timerISR, &timerParams, NULL);
}

// This function runs every 1 ms and should run in the ISR context from one of the on board timers
void timerISR(UArg arg0)
{
    Clock::Tick(CLOCK_MS);
}

volatile uint32_t Clock::m_milliseconds 	= 0;
volatile uint32_t Clock::m_seconds 	= 0;

void Clock::Tick(Clock_Units units /* = CLOCK_MS */)
{
	switch(units)
	{
	case CLOCK_MS:
		if (++m_milliseconds >= 1000)
		{
			m_seconds++;
			m_milliseconds = 0;
		}
		break;

	case CLOCK_S:
		m_seconds++;
		m_milliseconds = 0;
		break;
	}
}

The above code is pretty simple. timerISR should get called every millisecond like programmed to do in the initialize function. From there, it simply increments a counter. When the counter of ms reaches 1000, the seconds value is incremented and the ms is set back to 0.

However, when I do a simple code call to check if 5000 ms has passed, and to print, I get the following: (This shows that the timer is averaging around 5.93 seconds per call)

Any ideas as to why this occurs?