the necessary peak computation power in general-purpose systems. However, for a large class of applications in embedded real-time systems like cellular phones and camcorders, the variable operating frequency interferes with their deadline guarantee mechanisms, and DVS in this context, despite its growing

The energy usage of computer systems is becoming an important consideration, especially for batteryoperated systems. Various methods for reducing energy consumption have been investigated, both at the circuit level and at the operating systems level. In this paper, we propose a simple model of job

reductions in the probability of dynamic failure are achieved when the proposed policy is used. Index Terms-Real-time systems, deadline-constrained schedul-ing, dynamic failure, priority queues, soft deadlines.

n a hard real-time cyctem, every time-T critical task must meet its timing con-1 straint, typically specified as its deadline. (A task is a granule of computa-tion treated by the scheduler as a unit of work to be allocated processor time, or scheduled.) If any time-critical task fails to complete

This paper examines the role of parametric modeling as an application for the global computing grid, and explores some heuristics which make it possible to specify soft real time deadlines for larger computational experiments. We demonstrate the scheme with a case study utilizing the Globus toolkit

Abstract-In the design of distributed computer systems, the scheduling problem is considered to be an important one and has been addressed by many researchers. However, most approaches have not dealt with tasks ’ timing and resource requirements. In this paper, we describe a set of heuristic

these explorers with a form of computational intelligence that we call remote agents. In this paper we describe the Remote Agent, a specific autonomous agent architecture based on the principles of model-based programming, on-board deduction and search, and goal-directed closed-loop commanding, that takes a

A uniform, flexible approach is proposed for analysing the feasibility of deadline scheduled real-time systems. In its most general formulation, the analysis assumes sporadically periodic tasks with arbitrary deadlines, release jitter, and shared resources. System overheads of a tick driven

In this paper, we address power-aware scheduling of periodic hard real-time tasks using dynamic voltage scaling. Our solution includes three parts: (a) a static (off-line) solution to compute the optimal speed, assuming worst-case workload for each arrival, (b) an on-line speed reduction mechanism

Workstations and personal computers are increasingly being used for applications with real-time characteristics such as speech understanding and synthesis, media computations and I/O, and animation, often concurrently executed with traditional non-real-time workloads. This paper presents a system