Will capturing packets with tcpdump/tshark affect traffic processing?

[Rayne <hjazz6 () ymail com>]

Hi,
If I use tcpdump or tshark to capture packets on a certain interface, will it interfere with another program that is 
also receiving packets on that interface? 

For example, I have a program that receives traffic from eth0, processes it, then forwards the traffic out to another 
server via eth1. If I were to run tcpdump or tshark (-i eth0) and write the packets to a file, will these packets still 
be received by my program? The reason I'm running tcpdump/tshark is to check if there is any dropped packet on that 
interface, but I don't want it to affect the processing of the traffic.
Thank you.
Regards,Rayne

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