Schedulability issues for EDZL scheduling on real-time multiprocessor systems

Yi Hsiung Chao; Shun Shii Lin; Kwei Jay Lin

doi:10.1016/j.ipl.2008.02.014

Schedulability issues for EDZL scheduling on real-time multiprocessor systems

Yi Hsiung Chao
, Shun Shii Lin^*
, Kwei Jay Lin

^*此作品的通信作者

資訊工程學系

研究成果: 雜誌貢獻 › 期刊論文 › 同行評審

24 引文斯高帕斯（Scopus）

摘要

EDZL (Earliest Deadline first until Zero Laxity) is an efficient and practical scheduling algorithm on multiprocessor systems. It has a comparable number of context switch to EDF (Earliest Deadline First) and its schedulable utilization seems to be higher than that of EDF. Previously, there was a conjecture that the utilization bound of EDZL is 3 m / 4 = 0.75 m for m processors. In this paper, we disprove this conjecture and show that the utilization bound of EDZL is no greater than m (1 - 1 / e) ≈ 0.6321 m, where e ≈ 2.718 is the Euler's number.

原文	英語
頁（從 - 到）	158-164
頁數	7
期刊	Information Processing Letters
卷	107
發行號	5
DOIs	https://doi.org/10.1016/j.ipl.2008.02.014
出版狀態	已發佈 - 2008 8月 16

ASJC Scopus subject areas

理論電腦科學
訊號處理
資訊系統
電腦科學應用

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10.1016/j.ipl.2008.02.014

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引用此

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title = "Schedulability issues for EDZL scheduling on real-time multiprocessor systems",

abstract = "EDZL (Earliest Deadline first until Zero Laxity) is an efficient and practical scheduling algorithm on multiprocessor systems. It has a comparable number of context switch to EDF (Earliest Deadline First) and its schedulable utilization seems to be higher than that of EDF. Previously, there was a conjecture that the utilization bound of EDZL is 3 m / 4 = 0.75 m for m processors. In this paper, we disprove this conjecture and show that the utilization bound of EDZL is no greater than m (1 - 1 / e) ≈ 0.6321 m, where e ≈ 2.718 is the Euler's number.",

keywords = "EDF, EDZL, LLF, Real-time scheduling, Schedulability analysis, Scheduling",

author = "Chao, \{Yi Hsiung\} and Lin, \{Shun Shii\} and Lin, \{Kwei Jay\}",

note = "Funding Information: This research was supported in part by a grant NSC94-2213-E-003-004 from the National Science Council, ROC.",

year = "2008",

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doi = "10.1016/j.ipl.2008.02.014",

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TY - JOUR

T1 - Schedulability issues for EDZL scheduling on real-time multiprocessor systems

AU - Chao, Yi Hsiung

AU - Lin, Shun Shii

AU - Lin, Kwei Jay

N1 - Funding Information: This research was supported in part by a grant NSC94-2213-E-003-004 from the National Science Council, ROC.

PY - 2008/8/16

Y1 - 2008/8/16

N2 - EDZL (Earliest Deadline first until Zero Laxity) is an efficient and practical scheduling algorithm on multiprocessor systems. It has a comparable number of context switch to EDF (Earliest Deadline First) and its schedulable utilization seems to be higher than that of EDF. Previously, there was a conjecture that the utilization bound of EDZL is 3 m / 4 = 0.75 m for m processors. In this paper, we disprove this conjecture and show that the utilization bound of EDZL is no greater than m (1 - 1 / e) ≈ 0.6321 m, where e ≈ 2.718 is the Euler's number.

AB - EDZL (Earliest Deadline first until Zero Laxity) is an efficient and practical scheduling algorithm on multiprocessor systems. It has a comparable number of context switch to EDF (Earliest Deadline First) and its schedulable utilization seems to be higher than that of EDF. Previously, there was a conjecture that the utilization bound of EDZL is 3 m / 4 = 0.75 m for m processors. In this paper, we disprove this conjecture and show that the utilization bound of EDZL is no greater than m (1 - 1 / e) ≈ 0.6321 m, where e ≈ 2.718 is the Euler's number.

KW - EDF

KW - EDZL

KW - LLF

KW - Real-time scheduling

KW - Schedulability analysis

KW - Scheduling

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UR - https://www.scopus.com/pages/publications/47149114022#tab=citedBy

U2 - 10.1016/j.ipl.2008.02.014

DO - 10.1016/j.ipl.2008.02.014

M3 - Article

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SN - 0020-0190

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SP - 158

EP - 164

JO - Information Processing Letters

JF - Information Processing Letters

IS - 5

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Schedulability issues for EDZL scheduling on real-time multiprocessor systems

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