Bounding the Execution Times of DMA I/O Tasks on Hard-Real-Time Embedded Systems

机译：限制硬实时嵌入式系统上DMA I / O任务的执行时间

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A cycle-stealing DMA I/O task proceeds by stealing bus cycles from the CPU. The execution time of the DMA I/O task depends on the sequence of CPU instructions executing concurrently with it. This paper presents a method for bounding the worst-case execution time of a cycle-stealing DMA I/O task executing concurrently with a set of CPU tasks on a single-processor system. Our method uses the dynamic-programming technique to minimize the computational cost. We conducted exhaustive simulations on a widely-used embedded controller. The experimental results demonstrate our method safely and tightly bounds the worst-case execution times of cycle-stealing DMA I/O tasks.

机译：窃取DMA I / O任务是通过从CPU窃取总线周期来进行的。 DMA I / O任务的执行时间取决于与其并行执行的CPU指令的顺序。本文提出了一种方法，用于限制在单处理器系统上同时执行的周期窃取DMA I / O任务与一组CPU任务的最坏执行时间。我们的方法使用动态编程技术来最小化计算成本。我们在广泛使用的嵌入式控制器上进行了详尽的仿真。实验结果表明，我们的方法可以安全，严格地限制循环窃取DMA I / O任务的最坏情况执行时间。

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《International Conference on Real-Time and Embedded Computing Systems and Applications(RTCSA 2003); 20030218-20030220; Tainan City; CT》|2003年|P.499-512|共14页
会议地点 Tainan City(CT);Tainan City(CT)
作者
Tai-Yi Huang; Chih-Chieh Chou; Po-Yuan Chen;
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作者单位

National Tsing Hua University, Hsinchu Taiwan 300, ROC;

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原文格式 PDF
正文语种 eng
中图分类计算技术、计算机技术;
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Bounding the Execution Times of DMA I/O Tasks on Hard-Real-Time Embedded Systems

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