计算机工程与应用 ›› 2009, Vol. 45 ›› Issue (14): 46-48.DOI: 10.3778/j.issn.1002-8331.2009.14.012

• 研究、探讨 • 上一篇    下一篇

能够提供QoS保证的固定优先级调度

赵 明1,3,赵 海1,高怡臣2,罗桂兰1,董 洁3   

  1. 1.东北大学 信息科学与工程学院,沈阳 110004
    2.东北大学 机械工程与自动化学院,沈阳 110004
    3.沈阳建筑大学 信息与控制工程学院,沈阳 110168
  • 收稿日期:2008-10-06 修回日期:2008-11-17 出版日期:2009-05-11 发布日期:2009-05-11
  • 通讯作者: 赵 明

Fixed-priority schedule with QoS guarantee

ZHAO Ming1,3,ZHAO Hai1,GAO Yi-chen2,LUO Gui-lan1,DONG Jie3   

  1. 1.School of Information Science & Engineering,Northeastern University,Shenyang 110004,China
    2.School of Mechanical Engineering & Automation,Northeastern University,Shenyang 110004,China
    3.School of Information & Control Engineering,Shenyang Jianzhu University,Shenyang 110168,China
  • Received:2008-10-06 Revised:2008-11-17 Online:2009-05-11 Published:2009-05-11
  • Contact: ZHAO Ming

摘要: 弱硬实时应用要求调度算法必须确保提供满足其弱硬实时QoS(Quality of Service)参数要求的服务,一种新的能够提供(mk)-firm保证的固定优先级调度算法被提出,该算法能够根据任务的周期以及所要求的QoS参数进行调度优先级的设定,并通过将任务设置为抢占和可选来反映其紧迫程度。文中给出该算法的可调度判定不等式,并且通过对经典任务集的调度结果,验证了算法的有效性和灵活性。

关键词: 弱硬实时QoS, 调度, 抢占, 可选

Abstract: Weakly hard real-time application requires that scheduling algorithm should provide service satisfied its QoS parameter,so a new fixed-priority scheduling algorithm with(mk)-firm guarantee is presented.It assigns scheduling priority of task based on its period and its QoS parameter,and the task is switched between preemptive state and optional state to reflect its pressure.Schedulability test inequation of the algorithm is presented in the paper.The validity and the flexibility of the algorithm are proved through the analysis of classical task sets.

Key words: weakly hard real-time QoS, scheduling, preemptive, optional