[ntp:hackers] Serial port jitter in FreeBSD

David L. Mills mills at udel.edu
Wed Oct 26 09:40:31 PDT 2005


The serial port jitter with refclocks and FreeBSD rackety and mort is 
rather huge. I have a vague recollection of what can be done about that, 
specifically to diable the UART FIFO and software queue in the driver. 
I've done that for most of the systems here, but haven't a clue how to 
do that with FreeBSD and various motherboards. I've surfed 
www.freebsd.org with no joy. Help?


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