本文分析了嵌入式实时操作系统的两个重要的性能指标任务切换时间和中断延时及对实时控制的影响，并针对中断延时提出非屏蔽中断的改进方法。

This paper studies the interrupt latency and context-switch time of embedded real-time operating system, and about the interrupt latency a non-maskable interrupt idea is put forward.

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较长的停顿意味着更多记忆的衰退，任务切换的可能性增大，以及恢复时间也更长这样的假设。

A longer pause means more memory degradation, increased likelihood of a task switch, and the assumption that recovery time is also longer.

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在相对短的时间内，把注意力从一个任务切换到另一个任务，这就是“切换上下文”的定义。

Context Switching, is defined as changing focus and attention from one task to the other in relatively short periods of time.

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