tailieunhanh - Dynamic optimization of power consumption and response time in multiprocessors by turning processors off

In this condition, we can use some of processors instead of all of them to help reducing power consumption. As a hypothesis, turning processors with low processing load off can reduce the power consumption in such a way that response time of processes stay acceptable. In this paper, we discuss about a new policy to manage turning processors on/off during run time of system to examine the mentioned hypothesis. | International Journal of Computer Networks and Communications Security VOL. 3, NO. 7, JULY 2015, 298–304 Available online at: E-ISSN 2308-9830 (Online) / ISSN 2410-0595 (Print) Dynamic Optimization of Power Consumption and Response Time in Multiprocessors by Turning Processors Off SOMAYYEH J. JASSBI1 and JAMAL RAHIMI KHORSAND2 1 PhD. Department of Computer Engineering, Islamic Azad University, Science and Research Branch, Tehran, Iran 2 Msc. Department of Computer Engineering, Islamic Azad University, Science and Research Branch, Tehran, Iran E-mail: 1sjassbi@, 2jrkhorsand@ ABSTRACT The importance of energy and ways of managing it, because of the cost of unnecessary usage, mobile technologies and battery lifetime sensitivity, is increasing daily. In the last decade most of systems use multiprocessor computer systems to increase the performance. Hence, managing power consumption under time limitations present an important challenge. Using any scheduling algorithm, there are some gaps, in which no process is assigned to a certain processor. Furthermore, if response time of a process is less than a maximum value, the response time is acceptable and there is no need for the response time to be least possible. In this condition, we can use some of processors instead of all of them to help reducing power consumption. As a hypothesis, turning processors with low processing load off can reduce the power consumption in such a way that response time of processes stay acceptable. In this paper, we discuss about a new policy to manage turning processors on/off during run time of system to examine the mentioned hypothesis. Simulations show that in most of the cases this policy optimizes the power consumption of system better than other usable methods. Keywords: Multiprocessor, Response Time, Power Consumption, Energy Consumption, Processing Power. 1 INTRODUCTION Computer systems are one of the most energy consuming systems in the .