underrun & overrun的解释

Overrun: the receiver hardware is unable to hand received data to a hardware buffer because the input rate exceeds the receivers ability to handle the data. 
( 由于接口输入速率超过接受方处理能力,导致丢包。)


Underruns: There are no data in the output queue.
(Transmit under run,与 Overrun相反,输出接口的缓存从输出队列中取以数据帧时,没有数据帧,是一种非常少见的硬件异常。)

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