Timestamp precision

[Joerg Mayer <jmayer () loplof de>]

Hello,

I am capturing with dumpcap or tcpdump on a Linux machine.
Can someone provide me with some information/link(s) on
a) how precise the timestamps on an average Linux PC are
b) whether there are ways to improve the precision (OS wise or code wise)
c) a way of determining the timestamp precision of a given machine
d) what I should really have asked ;-)
What I'm interested in is not so much the absolute timestamp but the
precision of the delta between packets captured on the same interface.

Thanks
    Jörg
-- 
Joerg Mayer                                           <jmayer () loplof de>
We are stuck with technology when what we really want is just stuff that
works. Some say that should read Microsoft instead of technology.
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