Vahdaneh Kiani

Work place: Department of Computer Engineering, Science and Research Branch, Islamic Azad University, Iran



Research Interests: Computer systems and computational processes, Planning and Scheduling, Computer Architecture and Organization, Real-Time Computing, Systems Architecture, Data Structures and Algorithms


Vahdaneh Kiani received her B.S. in Computer Engineering from South Tehran Branch, Islamic Azad University, Tehran, Iran in 2011 and the M.S. in Computer Engineering form Department of Computer Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran in 2015. Her research interests are in the areas of embedded and real time systems, scheduling algorithms and Network on Chip.

Author Articles
Real Time Scheduling for CPU and Hard Disk Requirements-Based Periodic Task with the Aim of Minimizing Energy Consumption

By Vahdaneh Kiani Zeynab Mohseni Amir Masoud Rahmani

DOI:, Pub. Date: 8 Sep. 2015

In recent years, with an increasing number of requests, energy, power and temperature have been important keys in embedded systems, which decrease the lifetime of both CPUs and hard disks. The energy consumption is an important issue in computer systems, particularly real-time embedded systems. The frequency and the Revolutions Per Minute are major factors in the reduction of energy consumption in both processors and hard disk drives. Therefore, the main goal of this paper is to present a scheduling mechanism for a real time periodic task that can save more energy. This mechanism is based on increasing, as much as possible, the execution time of the CPU and/or the Read/Write time of the hard disk without passing the task deadline. This will be done by dynamically changing the CPU frequency and/or the RPM of hard disk. Our experimental results demonstrate that the proposed algorithm manages to lower energy consumption by an average of 25% and to reduce the number of missed tasks by 80%.

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