Idle block based methods for cloud workflow scheduling with preemptive and non-preemptive tasks

On Non-Preemptive Scheduling of Recurring Tasks Using Inserted Idle Times

We consider the problem of non-preemptively scheduling periodic and sporadic task systems on one processor using inserted idle times. For periodic task systems, we prove that the decision problem of determining whether a periodic task system is schedulable for all start times with respect to the class of algorithms using inserted idle times is NP-Hard in the strong sense, even when the deadline...

On non-preemptive scheduling of period and sporadic tasks

This paper examines a fundamental problem in the theory of real-time scheduling, that of scheduling a set of periodic or sporadic tasks on a uniprocessor without preemption and without inserted idle time. We exhibit a necessary and sufficient set of conditions C for a set of periodic or sporadic tasks to be schedulable for arbitrary release times of the tasks. We then show that any set of perio...

On Non-Preemptive Scheduling of Periodic and Sporadic Tasks

This paper examines a fundamental problem in the theory of real-time scheduling, that of scheduling a set of periodic or sporadic tasks on a uniprocessor without preemption and without inserted idle time. We exhibit a necessary and sufficient set of conditions C for a set of periodic or sporadic tasks to be schedulable for arbitrary release times of the tasks. We then show that any set of perio...

Preemptive and Non-Preemptive Real-Time Uni-Processor Scheduling

From Preemptive to Non-preemptive Speed-Scaling Scheduling

We are given a set of jobs, each one specified by its release date, its deadline and its processing volume (work), and a single (or a set of) speed-scalable processor(s). We adopt the standard model in speed-scaling in which if a processor runs at speed s then the energy consumption is s units of energy per time unit, where α > 1 is a small constant. Our goal is to find a schedule respecting th...