Managing Multiple Execution-Time Timers from a Single Task

Abstract: A proposal for adding execution time clocks and timers to the Ada language through a new package called Ada.Real_Time.Execution_time is being considered by the ARG. In that proposal, execution time budgets can be managed through protected objects that provide an entry to detect execution time budget overruns. With that interface, a given task can only wait for one budget overrun, thus making it impossible for a single task to manage the executiontime budgets of several other tasks. In this paper we propose an extension to the Execution_Time package that would allow a monitoring task to manage multiple budgets. Keywords: Real-Time Systems, Execution time budgets, CPU time, Ada 95