On 07-14-2003, Marcos Paredes Farrera wrote: > So if we have a tcpdump output with information of every packet in the > interface, the timestamping is different between the outgoing and incoming > packets in that interface. I really need to confirm that because I've been > some performance test with Instantaneous Throughput and I have noticed that > the way how tcpdump make the timestamping is critical for this analysis and > in the other hand if there is a high traffic the way how is time stamped > become more notorious. > libpcap only provides at most millisecond information. either u timestamp the first bit or the last bit does not matter unless it will take 1 ms to send the buffer. Moreover, if you want to know the _accurate_ time the network card receives the packet or send to the wire, you are using the wrong tool, libpcap can't do that because it depends on OS-specific bpf implementation. At least Linux can't give you that information either. You probably want to use something else.
Yu-chung - This is the TCPDUMP workers list. It is archived at http://www.tcpdump.org/lists/workers/index.html To unsubscribe use mailto:[EMAIL PROTECTED]
