REAL TIME OS WITH WORST CASE TEST FUNCTION

摘要

PROBLEM TO BE SOLVED: To simulatively generate the worst load condition to make a system test to be performed by allocating CPU time to a task so that allocated CPU time can not exceed the maximum allocation CPU time. SOLUTION: Task QOS (service quality) information 23 included in a task control block 22 contains unit period time and CPU time (minimum allocation time) of the minimum standard which is allocated to the task in the unit period time. This operating system allocates CPU time necessary to the real time processing of the task by storing the accumulated value of CPU times that are already allocated to task in the current unit period in an intra-period allocated time storage area 25 and utilizing it in its combination with the task QOS information 23. In such a case, CPU time which is equal to or more than value set to a maximum allocation time per unit period storage area 24 is controlled not to be allocated to the task within the same unit period.