Typically, the source device can't maintain a high enough transfer rate to keep the CPU busy.

典型情形是，源设备不能保持足够高的传输速率以 使得 CPU 保持繁忙。

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Captured CPU time is the CPU busy time that the operating system can reliably attribute to a given address space.

捕获的 CPU 时间是操作系统能可靠地用于一个特定的地址空间的 CPU 被占时间。

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Now that we can keep a CPU busy for a while, we'll see how to set a priority for a process. To summarize what we've learned so far

现在我们可以让 CPU 持续忙碌一段时间，我们了解如何设置进程的优先级。

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