On 17/06/2013 23:05, Steve Kostecke wrote:
[]
Contributing (i.e. embedding and not merely linking) this
article/topic/page to the Community Supported Documentation at
http://support.ntp.org/support is the best way to make this information
useful to the NTP Community.
I've added a link to:
On Mon, Jun 17, 2013 at 07:02:09PM +0100, David Taylor wrote:
Thanks, Steve. My knowledge of the source tree is even more limited
than my knowledge of C! In refclock_shm.c, it does say that the
peek routine is called every second, so if the type 28 driver has
an internal poll of one second,
On 18/06/2013 08:41, Miroslav Lichvar wrote:
[]
IIRC, the one second interval is used only to collect the SHM samples
and store them in a buffer. In the minpoll/maxpoll interval the
collected samples are processed in a median filter and one final
sample is used to update the clock. This improves
What should the poll be for the shared memory driver (type 28)? This
Web page:
http://www.eecis.udel.edu/~mills/ntp/html/drivers/driver28.html
suggests that the driver internally has a poll interval of 1 second,
another document I've seen suggests setting:
server 127.127.28.1 minpoll 1
David Taylor wrote:
What should the poll be for the shared memory driver (type 28)? This
Web page:
http://www.eecis.udel.edu/~mills/ntp/html/drivers/driver28.html
suggests that the driver internally has a poll interval of 1 second,
another document I've seen suggests setting:
server
On 2013-06-17, David Taylor david-tay...@blueyonder.co.uk.invalid wrote:
another document I've seen suggests setting:
server 127.127.28.1 minpoll 1 prefer
and yet in the ntpq -p billboard the poll is shown as 8 seconds.
Loopstats are reported at 8 second intervals, and the poll interval
On 17/06/2013 17:36, Steve Kostecke wrote:
[]
grepping the source tree is very informative...
According to ./ntpd/ntp_peer.c:
/*
* It is an error to set minpoll less than NTP_MINPOLL or to
* set maxpoll greater than NTP_MAXPOLL. However, minpoll is
* clamped not greater than NTP_MAXPOLL
On 17/06/2013 17:12, David Lord wrote:
[]
I've used type-28 + radioclkd2 for many years with MSF and for a
while with DCF. I've never set minpoll/maxpoll but it has always
defaulted to 6, ie 64 sec. DCF has a phase shift second marker
but is too distant for that to useful. When DCF reception was
On 2013-06-17, David Taylor david-tay...@blueyonder.co.uk wrote:
On 17/06/2013 17:36, Steve Kostecke wrote: []
grepping the source tree is very informative...
[snip: relevant quotes from the NTP Reference Implementation source]
Thanks, Steve. My knowledge of the source tree is even more
Steve Kostecke writes:
On 2013-06-17, David Taylor david-tay...@blueyonder.co.uk wrote:
Sorry if I'm asking very basic questions, but if I'm going to write a
small Web page about this I would rather the contents be accurate
and, if possible, best practice.
Contributing (i.e. embedding and
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