Packets being dropped by kernel on ethernet port

[mostly_hrmless]

Hi Everyone, I've been experimenting with a Raspberry Pi B+ running Kali to use for penetration testing. I've noticed a consistent packet loss when running any type of traffic sniffing. Running tcpdump on my home network just sniffing broadcast traffic showed some dropped packets:

484704 packets captured
485110 packets received by filter
406 packets dropped by kernel

I've seen as much as a 10% packet loss depending on the amount of traffic. Overclocking the Pi doesn't seem to help. Has anyone else seen this type of packet loss?

[steev]

Ethernet is on USB, even on the B+, the USB stack is likely at fault.

The Foundation has discovered that the controller and its driver expect realtime response from the ARM core, and if Linux's non-realtime scheduling doesn't respond in 1 ms, a split transaction USB event can be dropped. Not surprisingly, this occurs regularly and produces lost mouse clicks, stuck keyboard keys, etc..