[ntp:questions] Re: kernel precision on Linux

Terje Mathisen terje.mathisen at hda.hydro.com
Fri Jan 30 17:59:55 UTC 2004

Nicholas Garfield wrote:

>>The rule is: use NTP compiled with STA_NANO support on nanokernel and
>>NTP compiled without STA_NANO on stock kernel:)
> Do any operating systems come with pps-kit, nanokernel and STA_NANO support
> by default on the stock kernel distribution?

The closest you can get, afaik, is to use FreeBSD.

However, even on that os, you do have to enter a few commands to enable 
the ns-level timestamping of serial and parallel port events:


Insert one line in the kernel config file:

	options	PPS_SYNC

then follow the instructions on that handbook page.

- <Terje.Mathisen at hda.hydro.com>
"almost all programming can be viewed as an exercise in caching"

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