r—The average number of runnable kernel threads over the timing interval you have specified.

r——在您指定的时间间隔内，可运行内核线程的平均数量。

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B-the average number of kernel threads that are in the virtual memory waiting queue over your timing interval.

b——在您指定的时间间隔内，位于虚拟内存等待队列中的内核线程的平均数量。

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If a matching user name was found, the next for loop discards the least-significant portion of the timing interval between keystrokes and builds a new array g_sig with the timing values.

如果找到匹配的用户名，则下一个for循环将丢弃击键之间最不重要的计时间隔部分并用计时值构建一个新数组g_sig。

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