On 01/18/2012 01:06 PM, Shaun Ruffell wrote:
On Wed, Jan 18, 2012 at 12:58:31PM -0600, Kevin P. Fleming wrote:
On 01/18/2012 12:15 PM, Johan Wilfer wrote:
2012-01-18 17:50, Shaun Ruffell skrev:
One question first though, is your new server able to keep accurate
time with nt, or is the clock drifting or experiencing heavy jitter?
The clock is accurate by ntp sync. It uses the vanilla debian config you
get if you "apt-get install ntp".
Was it nt(p) you meant above? The clock drifts a lot if it is not synced
by ntp. I've noticed most of my hp 360/380 servers to drift up to 10
minutes per week, including this server. But ntp fixes this right?
That's pretty severe, and could certainly cause problems for DAHDI
trying to use the kernel as a timing source. NTP will correct the
drift, but the drift is still happening and it's not corrected on
every tick. If the ticks are not happening at the rate they are
supposed to, then DAHDI will not be operating at the clock rate it
is supposed to.
Kevin, this looks like a good candidate for using the "monotonic"
interface in the kernel that we were talking about last week or the
week before. The specific function call escapes me at the moment.
Indeed it does :-)
--
Kevin P. Fleming
Digium, Inc. | Director of Software Technologies
Jabber: [email protected] | SIP: [email protected] | Skype: kpfleming
445 Jan Davis Drive NW - Huntsville, AL 35806 - USA
Check us out at www.digium.com & www.asterisk.org
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