Scheduling Strategy of Virtual Device Based on Wake-up and Semi-sleep Mode

In order to meet the request and response requirements of users and further improve the efficiency of the computer system, a new type of virtual device scheduling strategy is proposed by integrating the wake-up and semi-sleep mode. At the end of a semi-sleep period, if the number of user requests waiting in the buffer reaches the wake-up threshold, the virtual device will transition from the semi-sleep state to the wake-up state to serve user requests at a normal rate. Otherwise, the virtual device will restart a new semi-sleep period to continuously provide low-speed services for user. According to the principle of scheduling strategy, a multi-service desk queuing model with policies and multiple asynchronous work vacations is established. Using the quasi-birth-death process and the matrix geometric solution method, performance indicators such as the average sojourn time requested by users and the energy-saving rate of computer system are deduced. Comprehensive numerical analysis experiments and computer system simulation experiments are used to evaluate the computer system performance of the virtual device scheduling strategy.