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The real-time scheduling algorithms based on the Insertion technique and Two-way SCAN technique  

Lee Myung Sub (영남대학교 컴퓨터공학과 인공지능 및 지능정보 시스템 연구실)
Park Chang Hyeon (영남대학교 컴퓨터공학과)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.30, no.6B, 2005 , pp. 377-386 More about this Journal
Abstract
Recently, to increase throughput per hour on real-time disk scheduling, a lot of algorithms that apply SCAN technique to EDF(Earliest Deadline First) that is representative real-time disk scheduling algorithm are studied. However, existing disk scheduling algorithms have several limitations because they consider continuous I/O requests when create SCAN group. Also, because SCAN technique was fixed direction, the existing algorithms have shortcoming that there are a lot of time damages. This paper proposes a new real-time disk scheduling algorithm based on the insertion technique and the two-way SCAN technique to solve the problems of the exiting real-time disk scheduling algorithms in hard real-time system. The simulation result shows that, when using our techniques, the disk throughput and the number of serviceable I/O requests are enhanced.
Keywords
Real-time disk scheduling; EDF; Insertion method; two-way scan technique;
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