Comment and Critically Comment

Jun 21st, 2015
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Alcorn State University
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Comment and Critically Comment The directive ‘comment’ is usually followed by a statement made by some famous personality, or taken out from a famous book. When you are asked to comment, you have to pick main points and give your ‘opinion’ on them based on evidences or arguments stemming from your wide reading. Your opinion may be for or against, but you must back your argument with evidences. These types of question offer you a chance to consolidate your reading of different subjects to justify your opinion.

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CASE STUDY IN RT-LINUXAjith Kumar P. Shetty, School of Electronics Engineering, VIT University, Vellore, Tamilnadu 63201, INDIA{ajithkumarpshetty.2013, }@vit.ac.inAbstract Embedded application is a hotspot at present and Linux gradually becomes the most important operating system for embedded applications. Aiming at the real-time problems of Linux and from five performance parameters of real time operating system, this paper analyzes and concludes that scheduling latency and interrupt latency are the fundamental constraints for improving real-time performance of Linux 2.6 kernel, then designs and implements a new task model and new interrupt operations to solve the above problem. Hard real-time task scheduling algorithm which is named as Priority Bitmap Algorithm, new interrupt response and new interrupt operations are emphasized and main codes are given out. Through testing, response time of real-time task is indicated to be shortened largely and meets the initial expectation. Keywords: Real-time, Interrupt Latency, Scheduling StrategyI. Introduction.RT Linuxis ahard real timeRTOSmicrokernelthat runs the entireLinuxoperating systemas fullypreemptiveprocess. It is one of the hard real-time variants of Linux, among several, that makes it possible to control robots, data acquisition systems, manufacturing plants, and other time-sensitive instruments and machines.It was developed by Victor Yodaiken, Michael

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