Linux UDP数据包丢失的原因

I have a Linux C++ application which receives sequenced UDP packets. Because of the sequencing, I can easily determine when a packet is lost or re-ordered, i.e. when a "gap" is encountered. The system has a recovery mechanism to handle gaps, however, it is best to avoid gaps in the first place. Using a simple libpcap-based packet sniffer, I have determined that there are no gaps in the data at the hardware level. However, I am seeing a lot of gaps in my application. This suggests the kernel is dropping packets; it is confirmed by looking at the I have a Linux C++ application which receives s