根本问题是，随着文件描述符数量的增加，每个poll操作所需的工作量会线性增加。
The fundamental problem is that the amount of work to be done for each poll operation scales linearly with the number of file descriptors.
根本问题是，随着文件描述符数量的增加，每个poll操作所需的工作量会线性增加。
The fundamental problem is that the amount of work to be done for each poll operation scales linearly with the number of file descriptors.
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