实时系统调度算法的抢占控制模型及其遗传算法实现的中期报告.docx

实时系统调度算法的抢占控制模型及其遗传算法实现的中期报告

摘要：

本文旨在研究实时系统调度算法的抢占控制模型及其遗传算法实现。本文首先介绍了实时系统调度算法的相关知识和概念，包括实时性、抢占性、优先级等。接着，本文提出了一种基于遗传算法的实时系统调度算法抢占控制模型，该模型包括目标函数、限制条件、变量、决策变量等。在模型构建的基础上，本文设计了一种基于遗传算法的实时系统调度算法优化方法，并通过实验验证了该方法的有效性。

关键词：实时系统调度算法；抢占控制模型；遗传算法；优化方法；实验验证

Introduction

Withthedevelopmentofcomputertechnology,real-timesystemshavebeenwidelyusedinvariousfields.Areal-timesystemisasystemthatmustcompleteaspecifictaskwithinacertainperiodoftime.Real-timesystemscanbeclassifiedintohardreal-timesystemsandsoftreal-timesystemsaccordingtotheseverityoftheconsequencesofmissingthedeadline.Inahardreal-timesystem,missingthedeadlinemaycausefatalconsequences,whileinasoftreal-timesystem,missingthedeadlinemayonlycauseperformancedegradation.

Real-timesystemschedulingalgorithmisakeytechnologyinreal-timesystems.Theschedulingalgorithmdeterminestheorderandtimeforthesystemtoperformtaskstoensurethatthesystemcancompletetaskswithinthedeadline.Real-timesystemschedulingalgorithmscanbeclassifiedintopreemptiveschedulingalgorithmsandnon-preemptiveschedulingalgorithmsaccordingtowhetherthesystemcaninterrupttheexecutionofatask.Preemptiveschedulingalgorithmscanimprovesystemresponsiveness,butmayalsocausetaskstarvationandpriorityinversionproblems.

Inthispaper,weproposeapreemptivecontrolmodelforreal-timesystemschedulingalgorithmsbasedongeneticalgorithms.Themodelincludestheobjectivefunction,constraintconditions,variables,decisionvariables,etc.Then,wedesignanoptimizationmethodbasedongeneticalgorithmsforreal-timesystemschedulingalgorithmsandverifytheeffectivenessofthemethodthroughexperiments.

LiteratureReview

Theschedulingalgorithmisthekeytechnologyofreal-timesystems.Researchershaveproposedmanyschedulingalgorithmsforreal-timesystems,includingearliestdeadlinefirst(EDF)schedulingalgorithm,