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a fine-grain timer scheme for real-time in linux
Authors
叶以民
孙玉芳
李小群
赵慧斌
Publication date
1 January 2003
Publisher
Abstract
时钟精度直接影响到任务能否被及时响应和调度,作为一个分时系统,Linux 的10ms周期性时钟粒度是必要而且合适的.但是实时系统一般都要求微秒级的响应精度,显然Linux的时钟粒度过于粗糙.然而简单地提高时钟频率意味着时钟中断的相应处理过程将占用过多的处理器时间,从而使得整个系统的有效利用率急剧下降.为了改进Linux的实时性能,讨论了基于Linux的实时操作系统RFRTOS中的时钟粒度细化方案.实验结果显示所做改进以不大的代价有效地提高了Linux的时钟精度
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Institute Of Software, Chinese Academy Of Sciences
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Last time updated on 30/12/2017