| Re: [chrony-users] understanding tracking.log |
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SD=Standard deviation.
William G. Unruh | Canadian Institute for| Tel: +1(604)822-3273
Physics&Astronomy | Advanced Research | Fax: +1(604)822-5324
UBC, Vancouver,BC | Program in Cosmology | unruh@xxxxxxxxxxxxxx
Canada V6T 1Z1 | and Gravity | www.theory.physics.ubc.ca/
On Tue, 21 Jul 2015, Bryan Christianson wrote:
In looking at /var/log/tracking.log I see
Date (UTC) Time IP Address St Freq ppm Skew ppm Offset L Co Offset sd Rem. corr.
==================================================================================================
2015-07-20 20:13:34 10.64.1.25 2 30.665 0.177 -3.530e-06 N 2 6.553e-05 1.151e-05
I am having trouble understanding the field 'Offset sd' and what i represents. It is consistently an order of magnitude greater in value than the 'Offset' field so I presume it is not the standard deviation of offset.
"chronyc tracking" displays a result for RMS Offset consistent with 'Last Offset' as seen here:
Reference ID : 10.64.1.25 (fleur.lan.seaviewsound.co.nz)
Stratum : 2
Ref time (UTC) : Mon Jul 20 20:20:34 2015
System time : 0.000007302 seconds slow of NTP time
Last offset : +0.000004646 seconds
RMS offset : 0.000005560 seconds
Frequency : 30.482 ppm fast
Residual freq : +0.004 ppm
Skew : 0.082 ppm
Root delay : 0.000237 seconds
Root dispersion : 0.000094 seconds
Update interval : 16.2 seconds
Leap status : Normal
Any help appreciated
Regards
Bryan Christianson
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