Consider a uniprocessor system executing three tasks T1,T2T1,T2 and T3T3 each of which is composed of an infinite sequence of jobs (or instances) which arrive periodically at intervals of 3, 7 and 20 milliseconds, respectively. The priority of each task is the inverse of its period, and the available tasks are scheduled in order of priority, which is the highest priority task scheduled first. Each instance of T1,T2 and T3 requires an execution time of 1, 2 and 4 milliseconds, respectively. Given that all tasks initially arrive at the beginning of the 1st millisecond and task preemptions are allowed, the first instance of T3 completes its execution at the end of_____________________milliseconds.
Reference : https://gateoverflow.in/8330/gate2015-1_46
Query 1 : Will I assume the meaning of this statement is "Given that all tasks initially arrive at the beginning of the 1st millisecond and task preemptions are allowed, " is that all processes arrive at 0 ms ?
