Method and apparatus for measuring CPU task occupancy rate in a real-time system

An apparatus for measuring a CPU occupancy rate of a task in a real-time system. The apparatus includes a task register unit registering a task to be measured in flag bits, and a task selecting module selecting and outputting a bit address of the task having a high priority of the flag bit among the set flag bits. A count signal generating unit processing the bit address inputted from the task selecting module to generate a count signal, and a count unit counting an execution time of the task in accordance with the count signal are further included. A CPU sets the flag bit when the task is executed and calculates an execution number and the CPU occupancy rate of the task based on a count value of the count unit.