Abstract
PDF HTML阅读 XML下载 导出引用 引用提醒 一种可行的分布式硬实时容错调度算法 DOI: 10.3724/SP.J.1001.2012.04004 作者: 作者单位: 作者简介: 通讯作者: 中图分类号: 基金项目: 国家自然科学基金(60603032) Feasible Fault-Tolerant Scheduling Algorithm for Distributed Hard-Real-Time System Author: Affiliation: Fund Project: 摘要 | 图/表 | 访问统计 | 参考文献 | 相似文献 | 引证文献 | 资源附件 | 文章评论 摘要:针对分布式硬实时系统发生处理机故障后,当前周期内的任务实例和后续实例相对截止期限的不同紧迫程度,提出非紧迫周期内延迟策略——DNUP(delay in non-urgent period).该策略能够尽可能地推迟非紧迫实例的执行,使得低优先级实例有更多的机会完成其紧迫周期内的执行,从而实现处理器空闲(slack)资源的合理挪动.仿真实验结果表明,与其他几个著名的分布式容错调度算法相比,DNUP 策略能够提高任务的可调度性,从而有效减少了所需处理机的数目. Abstract:In distributed hard-real-time systems, when a hardware failure occurs, the task instance in current period is usually more urgent than the subsequent ones. According to this, a novel strategy of delay in non-urgent period (referred to as DNUP) is proposed. DNUP strategy can postpone the execution of non-urgent instance as late as possible and reserve the slack time for the instance with low priority. Thus it has a better chance to complete its execution in an urgent period. Extensive simulations reveal that DNUP can improve the schedulability of periodic tasks and achieve a remarkable saving on the number of processors required with respect to several well-known fault-tolerant scheduling algorithms. 参考文献 相似文献 引证文献
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