I have posted a web page www.theory.physics.ubc.ca/scatter/rt.html giving some measurements of the effect of interrupt coalescence on a Intel Gigabit Ethernet on the synchronization of client computers via ntp packets. The difference between running the card at 100Mbps with coalescence and at Gb without drops the offset scatter by a factor of over 5 (from about 30us, to about 5us). This was discussed in another thread (on RADclock) where the results could well be hidden from people interested in the topic, so I have put this into a new thread.
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