[time-nuts] SLIP vs Ethernet for NTP

Hal Murray hmurray at megapathdsl.net
Mon Oct 24 01:28:55 EDT 2011


>> I think gig ethernet has a higher delay for smaller packets (ntp's udp
>> datagram is tiny) than 100mbit ethernet.

> There is very little to support this claim.

Most gig-ethernet chips try to save CPU cycles by batching interrupts.  There 
is usually some way to turn it off.  I don't have any numbers handy, but I 
wouldn't be surprised if that made the observed round trip times slower than 
100 meg ethernet.

Most UARTs have similar logic.


-- 
These are my opinions, not necessarily my employer's.  I hate spam.







More information about the time-nuts mailing list