Scheduling real-time systems on multiprocessors introduces complexities that do not arise when using uniprocessors. When scheduling using EDF on multiprocessor platforms, breaking deadline ties in different ways can change the resulting schedule dramatically. We consider methods to resolve the ambiguities in EDF priorities due to coincident deadlines. We show that no optimal ambiguity solver ca...

This paper examines the role of external debt financing (EDF) in shaping credit cycles and joint implications EDF flows growth for output volatility ten major emerging economies. We find that extreme phases—known as surge stop episodes—in are significantly associated with surges episodes shown by a panel multinominal logit estimation. However, association is asymmetric—EDF more likely to bring ...

Time constraint is the main factor in real time operating system. Different scheduling algorithm is used to schedule the task. The Earliest Deadline First and Ant Colony Optimization is a dynamic scheduling algorithm used in a real time system and it is most beneficial scheduling algorithm for single processor real-time operating systems when the systems are preemptive and under loaded. The mai...

This paper reports on our on going empirical evalu ation of a two tiered resource allocation scheme assum ing independent jobs that is jobs have no precedence constraints The rst tier extends the temporal density approach load balancing within a time interval while the second tier uses variations of the Earliest Deadline First EDF approach to schedule jobs at a site However job scheduling at si...

The Earliest Deadline First (EDF) scheduling algorithm is known to be suboptimal for meeting all deadlines under global scheduling on multiprocessor platforms. However, EDF is an attractive choice for scheduling soft-real-time systems on multiprocessors. Previous work has demonstrated that the maximum tardiness is bounded, and has derived formulas for computing tardiness bounds, in EDF-schedule...

This paper introduces a new model for describing jobs and tasks for real-time systems. Using this model can improve utilization bounds on uniform multiprocessors, in which each processor has an associated speed. Traditionally, a job executing on a processor of speed s for t units of time will perform s × t units of work. However, this uniform scaling only occurs if tasks are completely CPU boun...

Fixed-task-priority (FTP) scheduling and earliest-deadline-first (EDF) scheduling policies are alike in fixing the priority of each job of a task at the time the job is released. This common feature of FTP and EDF scheduling permits a unified analysis of scheduling failures, to derive new sufficient tests for meeting all deadlines of a set of independent sporadic tasks under a global preemptive...

The challenge in conserving energy in embedded real-time systems is to reduce power consumption while preserving temporal correctness. Previous research has focused on power conservation for either the processor or I/O devices alone. The system-wide energy conservation has received little attention. In this paper, we analyze the problem of system-wide energy-efficient scheduling for hard real-t...