NTPsec

Kong

Report generated: Fri May 24 15:49:00 2024 UTC
Start Time: Thu May 23 15:49:00 2024 UTC
End Time: Fri May 24 15:49:00 2024 UTC
Report Period: 1.0 days
Warning: plots clipped

Daily stats   Weekly stats   Live GNSS Data   24 Hour Scatter Plots: ( )

Local Clock Time/Frequency Offsets

local offset plot

Percentiles...... Ranges...... Skew- Kurt-
Name Min1%5%50%95% 99%Max   90%98%StdDev  MeanUnits nessosis
Local Clock Time Offset -373.416 -258.139 -98.239 -3.755 102.699 250.698 328.579 200.938 508.837 70.993 -1.315 µs -3.946 17.86
Local Clock Frequency Offset 11.583 11.603 11.666 11.910 13.423 13.471 13.479 1.757 1.868 0.490 12.053 ppm 1.326e+04 3.15e+05

The time and frequency offsets between the ntpd calculated time and the local system clock. Showing frequency offset (red, in parts per million, scale on right) and the time offset (blue, in μs, scale on left). Quick changes in time offset will lead to larger frequency offsets.

These are fields 3 (time) and 4 (frequency) from the loopstats log file.



Local RMS Time Jitter

local jitter plot

Percentiles...... Ranges...... Skew- Kurt-
Name Min1%5%50%95% 99%Max   90%98%StdDev  MeanUnits nessosis
Local RMS Time Jitter 9.459 10.073 12.096 23.008 58.980 79.038 89.928 46.884 68.965 15.027 27.316 µs 4.511 14.5

The RMS Jitter of the local clock offset. In other words, how fast the local clock offset is changing.

Lower is better. An ideal system would be a horizontal line at 0μs.

RMS jitter is field 5 in the loopstats log file.



Local RMS Frequency Jitter

local stability plot

Percentiles...... Ranges...... Skew- Kurt-
Name Min1%5%50%95% 99%Max   90%98%StdDev  MeanUnits nessosis
Local RMS Frequency Jitter 2.899 4.218 5.703 13.898 91.920 113.333 138.153 86.217 109.115 26.536 25.606 ppb 1.734 5.449

The RMS Frequency Jitter (aka wander) of the local clock's frequency. In other words, how fast the local clock changes frequency.

Lower is better. An ideal clock would be a horizontal line at 0ppm.

RMS Frequency Jitter is field 6 in the loopstats log file.



Local Clock Time Offset Histogram

local offset histogram plot

Percentiles...... Ranges...... Skew- Kurt-
Name Min1%5%50%95% 99%Max   90%98%StdDev  MeanUnits nessosis
Local Clock Offset -373.416 -258.139 -98.239 -3.755 102.699 250.698 328.579 200.938 508.837 70.993 -1.315 µs -3.946 17.86

The clock offsets of the local clock as a histogram.

The Local Clock Offset is field 3 from the loopstats log file.



Local Temperatures

local temps plot

Local temperatures. These will be site-specific depending upon what temperature sensors you collect data from. Temperature changes affect the local clock crystal frequency and stability. The math of how temperature changes frequency is complex, and also depends on crystal aging. So there is no easy way to correct for it in software. This is the single most important component of frequency drift.

The Local Temperatures are from field 3 from the tempstats log file.



Local Frequency/Temp

local freq temps plot

Percentiles...... Ranges...... Skew- Kurt-
Name Min1%5%50%95% 99%Max   90%98%StdDev  MeanUnits nessosis
Local Clock Frequency Offset 11.583 11.603 11.666 11.910 13.423 13.471 13.479 1.757 1.868 0.490 12.053 ppm 1.326e+04 3.15e+05
Temp /dev/sda 46.000 46.000 46.000 48.000 48.000 49.000 49.000 2.000 3.000 0.800 47.495 °C
Temp /dev/sdb 35.000 35.000 35.000 36.000 37.000 37.000 37.000 2.000 2.000 0.667 36.355 °C
Temp LM0 49.000 49.000 49.000 54.000 58.000 59.000 59.000 9.000 10.000 2.864 53.850 °C
Temp LM1 43.375 43.500 43.625 44.625 73.625 74.625 76.875 30.000 31.125 9.961 49.362 °C
Temp LM10 25.000 25.000 25.000 25.000 25.000 25.000 26.000 0.000 0.000 0.059 25.003 °C
Temp LM11 63.000 63.000 63.000 63.000 64.000 65.000 65.000 1.000 2.000 0.526 63.470 °C
Temp LM12 3.000 4.000 5.000 10.000 14.000 18.000 19.000 9.000 14.000 2.674 10.387 °C
Temp LM13 25.000 25.000 25.000 25.000 25.000 25.000 26.000 0.000 0.000 0.059 25.003 °C
Temp LM14 44.000 44.000 44.000 45.000 46.000 46.000 46.000 2.000 2.000 0.525 44.990 °C
Temp LM15 37.000 37.000 38.000 38.000 62.000 63.000 66.000 24.000 26.000 8.037 41.951 °C
Temp LM16 68.000 68.000 68.000 69.000 69.500 69.500 69.500 1.500 1.500 0.368 68.794 °C
Temp LM17 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 °C
Temp LM18 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 °C
Temp LM19 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 °C
Temp LM2 43.500 43.500 43.750 45.500 72.750 75.000 75.500 29.000 31.500 9.443 49.583 °C
Temp LM20 43.375 43.500 43.625 44.625 73.625 74.625 76.875 30.000 31.125 9.963 49.340 °C
Temp LM21 68.250 68.250 68.375 69.000 69.500 69.750 69.750 1.125 1.500 0.313 68.909 °C
Temp LM22 35.000 35.000 35.000 37.000 37.000 37.000 37.000 2.000 2.000 0.651 36.470 °C
Temp LM23 64.850 65.850 65.850 69.850 70.850 70.850 71.850 5.000 5.000 1.519 69.191 °C
Temp LM3 46.000 46.000 46.000 48.000 48.000 49.000 49.000 2.000 3.000 0.796 47.505 °C
Temp LM4 49.850 49.850 49.850 50.850 51.850 52.850 54.850 2.000 3.000 0.579 50.927 °C
Temp LM5 49.850 49.850 49.850 50.850 51.850 52.850 54.850 2.000 3.000 0.590 50.934 °C
Temp LM6 56.850 57.850 57.850 59.850 61.850 66.850 72.850 4.000 9.000 1.561 59.752 °C
Temp LM7 49.850 49.850 49.850 50.850 51.850 52.850 54.850 2.000 3.000 0.574 50.944 °C
Temp LM8 44.000 44.000 44.000 45.000 46.000 46.000 46.000 2.000 2.000 0.518 44.983 °C
Temp LM9 37.500 37.500 38.000 38.500 51.500 52.000 52.000 13.500 14.500 3.974 40.143 °C

The frequency offsets and temperatures. Showing frequency offset (red, in parts per million, scale on right) and the temperatures.

These are field 4 (frequency) from the loopstats log file, and field 3 from the tempstats log file.



Server Offsets

peer offsets plot

The offset of all refclocks and servers. This can be useful to see if offset changes are happening in a single clock or all clocks together.

Clock Offset is field 5 in the peerstats log file.



Server Offset 2001:470:e815::24 (pi4.rellim.com)

peer offset 2001:470:e815::24 plot

Percentiles...... Ranges...... Skew- Kurt-
Name Min1%5%50%95% 99%Max   90%98%StdDev  MeanUnits nessosis
Server Offset 2001:470:e815::24 (pi4.rellim.com) -372.609 -193.805 -71.739 17.140 131.717 277.087 388.032 203.456 470.892 72.786 20.372 µs -2.176 13.18

The offset of a server in seconds. This is useful to see how the measured offset is behaving.

The chart also plots offset±rtt, where rtt is the round trip time to the server. NTP can not really know the offset of a remote chimer, NTP computes it by subtracting rtt/2 from the offset. Plotting the offset±rtt reverses this calculation to more easily see the effects of rtt changes.

Closer to 0s is better. An ideal system would be a horizontal line at 0s. Typical 90% ranges may be: local LAN server 80µs; 90% ranges for WAN server may be 4ms and much larger.

Clock Offset is field 5 in the peerstats log file. The Round Trip Time (rtt) is field 6 in the peerstats log file.



Server Offset 2001:470:e815::8 (spidey.rellim.com)

peer offset 2001:470:e815::8 plot

Percentiles...... Ranges...... Skew- Kurt-
Name Min1%5%50%95% 99%Max   90%98%StdDev  MeanUnits nessosis
Server Offset 2001:470:e815::8 (spidey.rellim.com) -410.010 -285.729 -185.593 -37.440 94.507 215.661 312.331 280.100 501.390 90.601 -36.888 µs -7.076 21.21

The offset of a server in seconds. This is useful to see how the measured offset is behaving.

The chart also plots offset±rtt, where rtt is the round trip time to the server. NTP can not really know the offset of a remote chimer, NTP computes it by subtracting rtt/2 from the offset. Plotting the offset±rtt reverses this calculation to more easily see the effects of rtt changes.

Closer to 0s is better. An ideal system would be a horizontal line at 0s. Typical 90% ranges may be: local LAN server 80µs; 90% ranges for WAN server may be 4ms and much larger.

Clock Offset is field 5 in the peerstats log file. The Round Trip Time (rtt) is field 6 in the peerstats log file.



Server Offset 2001:67c:1270:0:dea6:32ff:feaf:803b (khronos.mikieboy.net)

peer offset 2001:67c:1270:0:dea6:32ff:feaf:803b plot

Percentiles...... Ranges...... Skew- Kurt-
Name Min1%5%50%95% 99%Max   90%98%StdDev  MeanUnits nessosis
Server Offset 2001:67c:1270:0:dea6:32ff:feaf:803b (khronos.mikieboy.net) -3.291 -2.261 -0.871 -0.437 0.017 1.543 3.757 0.888 3.804 0.501 -0.423 ms -10.35 48.42

The offset of a server in seconds. This is useful to see how the measured offset is behaving.

The chart also plots offset±rtt, where rtt is the round trip time to the server. NTP can not really know the offset of a remote chimer, NTP computes it by subtracting rtt/2 from the offset. Plotting the offset±rtt reverses this calculation to more easily see the effects of rtt changes.

Closer to 0s is better. An ideal system would be a horizontal line at 0s. Typical 90% ranges may be: local LAN server 80µs; 90% ranges for WAN server may be 4ms and much larger.

Clock Offset is field 5 in the peerstats log file. The Round Trip Time (rtt) is field 6 in the peerstats log file.



Server Offset 204.17.205.1

peer offset 204.17.205.1 plot

Percentiles...... Ranges...... Skew- Kurt-
Name Min1%5%50%95% 99%Max   90%98%StdDev  MeanUnits nessosis
Server Offset 204.17.205.1 -569.701 -545.227 -499.809 -28.056 189.833 244.762 319.862 689.642 789.989 210.391 -71.236 µs -7.08 20.06

The offset of a server in seconds. This is useful to see how the measured offset is behaving.

The chart also plots offset±rtt, where rtt is the round trip time to the server. NTP can not really know the offset of a remote chimer, NTP computes it by subtracting rtt/2 from the offset. Plotting the offset±rtt reverses this calculation to more easily see the effects of rtt changes.

Closer to 0s is better. An ideal system would be a horizontal line at 0s. Typical 90% ranges may be: local LAN server 80µs; 90% ranges for WAN server may be 4ms and much larger.

Clock Offset is field 5 in the peerstats log file. The Round Trip Time (rtt) is field 6 in the peerstats log file.



Server Offset 204.17.205.30

peer offset 204.17.205.30 plot

Percentiles...... Ranges...... Skew- Kurt-
Name Min1%5%50%95% 99%Max   90%98%StdDev  MeanUnits nessosis
Server Offset 204.17.205.30 -416.920 -265.211 -86.800 -31.872 79.482 267.695 307.375 166.282 532.906 70.553 -27.679 µs -6.438 26.02

The offset of a server in seconds. This is useful to see how the measured offset is behaving.

The chart also plots offset±rtt, where rtt is the round trip time to the server. NTP can not really know the offset of a remote chimer, NTP computes it by subtracting rtt/2 from the offset. Plotting the offset±rtt reverses this calculation to more easily see the effects of rtt changes.

Closer to 0s is better. An ideal system would be a horizontal line at 0s. Typical 90% ranges may be: local LAN server 80µs; 90% ranges for WAN server may be 4ms and much larger.

Clock Offset is field 5 in the peerstats log file. The Round Trip Time (rtt) is field 6 in the peerstats log file.



Server Offset 2405:fc00::1 (robusta.dcs1.biz)

peer offset 2405:fc00::1 plot

Percentiles...... Ranges...... Skew- Kurt-
Name Min1%5%50%95% 99%Max   90%98%StdDev  MeanUnits nessosis
Server Offset 2405:fc00::1 (robusta.dcs1.biz) -2.787 -0.932 -0.371 0.138 1.004 2.260 3.020 1.375 3.192 0.526 0.208 ms -1.345 11.4

The offset of a server in seconds. This is useful to see how the measured offset is behaving.

The chart also plots offset±rtt, where rtt is the round trip time to the server. NTP can not really know the offset of a remote chimer, NTP computes it by subtracting rtt/2 from the offset. Plotting the offset±rtt reverses this calculation to more easily see the effects of rtt changes.

Closer to 0s is better. An ideal system would be a horizontal line at 0s. Typical 90% ranges may be: local LAN server 80µs; 90% ranges for WAN server may be 4ms and much larger.

Clock Offset is field 5 in the peerstats log file. The Round Trip Time (rtt) is field 6 in the peerstats log file.



Server Offset 2604:a880:1:20::17:5001 (ntp1.glypnod.com)

peer offset 2604:a880:1:20::17:5001 plot

Percentiles...... Ranges...... Skew- Kurt-
Name Min1%5%50%95% 99%Max   90%98%StdDev  MeanUnits nessosis
Server Offset 2604:a880:1:20::17:5001 (ntp1.glypnod.com) -2.350 -2.156 -1.894 -1.509 -0.859 1.005 1.501 1.035 3.161 0.413 -1.459 ms -103.7 510

The offset of a server in seconds. This is useful to see how the measured offset is behaving.

The chart also plots offset±rtt, where rtt is the round trip time to the server. NTP can not really know the offset of a remote chimer, NTP computes it by subtracting rtt/2 from the offset. Plotting the offset±rtt reverses this calculation to more easily see the effects of rtt changes.

Closer to 0s is better. An ideal system would be a horizontal line at 0s. Typical 90% ranges may be: local LAN server 80µs; 90% ranges for WAN server may be 4ms and much larger.

Clock Offset is field 5 in the peerstats log file. The Round Trip Time (rtt) is field 6 in the peerstats log file.



Server Offset 2606:4700:f1::1 (time.cloudflare.com)

peer offset 2606:4700:f1::1 plot

Percentiles...... Ranges...... Skew- Kurt-
Name Min1%5%50%95% 99%Max   90%98%StdDev  MeanUnits nessosis
Server Offset 2606:4700:f1::1 (time.cloudflare.com) -0.440 -0.096 0.102 0.453 0.870 1.608 2.871 0.768 1.705 0.292 0.468 ms 4.433 27.72

The offset of a server in seconds. This is useful to see how the measured offset is behaving.

The chart also plots offset±rtt, where rtt is the round trip time to the server. NTP can not really know the offset of a remote chimer, NTP computes it by subtracting rtt/2 from the offset. Plotting the offset±rtt reverses this calculation to more easily see the effects of rtt changes.

Closer to 0s is better. An ideal system would be a horizontal line at 0s. Typical 90% ranges may be: local LAN server 80µs; 90% ranges for WAN server may be 4ms and much larger.

Clock Offset is field 5 in the peerstats log file. The Round Trip Time (rtt) is field 6 in the peerstats log file.



Server Offset SHM(0)

peer offset SHM(0) plot

Percentiles...... Ranges...... Skew- Kurt-
Name Min1%5%50%95% 99%Max   90%98%StdDev  MeanUnits nessosis
Server Offset SHM(0) -161.730 -139.259 -136.892 -131.115 -124.697 -123.005 -119.921 12.195 16.254 3.875 -130.900 ms -4.218e+04 1.471e+06

The offset of a server in seconds. This is useful to see how the measured offset is behaving.

The chart also plots offset±rtt, where rtt is the round trip time to the server. NTP can not really know the offset of a remote chimer, NTP computes it by subtracting rtt/2 from the offset. Plotting the offset±rtt reverses this calculation to more easily see the effects of rtt changes.

Closer to 0s is better. An ideal system would be a horizontal line at 0s. Typical 90% ranges may be: local LAN server 80µs; 90% ranges for WAN server may be 4ms and much larger.

Clock Offset is field 5 in the peerstats log file. The Round Trip Time (rtt) is field 6 in the peerstats log file.



Server Jitters

peer jitters plot

The RMS Jitter of all refclocks and servers. Jitter is the current estimated dispersion, in other words the variation in offset between samples.

Closer to 0s is better. An ideal system would be a horizontal line at 0s.

RMS Jitter is field 8 in the peerstats log file.



Server Jitter 2001:470:e815::24 (pi4.rellim.com)

peer jitter 2001:470:e815::24 plot

Percentiles...... Ranges...... Skew- Kurt-
Name Min1%5%50%95% 99%Max   90%98%StdDev  MeanUnits nessosis
Server Jitter 2001:470:e815::24 (pi4.rellim.com) 2.075 3.483 5.999 16.780 65.116 102.991 117.037 59.117 99.508 20.064 23.372 µs 2.622 9.631

The RMS Jitter of a server. Jitter is the current estimated dispersion, in other words the variation in offset between samples.

Closer to 0s is better. An ideal system would be a horizontal line at 0s.

RMS Jitter is field 8 in the peerstats log file.



Server Jitter 2001:470:e815::8 (spidey.rellim.com)

peer jitter 2001:470:e815::8 plot

Percentiles...... Ranges...... Skew- Kurt-
Name Min1%5%50%95% 99%Max   90%98%StdDev  MeanUnits nessosis
Server Jitter 2001:470:e815::8 (spidey.rellim.com) 1.628 2.492 3.472 8.864 56.158 111.985 150.391 52.686 109.493 19.450 15.658 µs 2.868 15.16

The RMS Jitter of a server. Jitter is the current estimated dispersion, in other words the variation in offset between samples.

Closer to 0s is better. An ideal system would be a horizontal line at 0s.

RMS Jitter is field 8 in the peerstats log file.



Server Jitter 2001:67c:1270:0:dea6:32ff:feaf:803b (khronos.mikieboy.net)

peer jitter 2001:67c:1270:0:dea6:32ff:feaf:803b plot

Percentiles...... Ranges...... Skew- Kurt-
Name Min1%5%50%95% 99%Max   90%98%StdDev  MeanUnits nessosis
Server Jitter 2001:67c:1270:0:dea6:32ff:feaf:803b (khronos.mikieboy.net) 0.153 0.230 0.282 0.726 4.345 7.437 19.848 4.063 7.206 1.989 1.353 ms 4.808 42.13

The RMS Jitter of a server. Jitter is the current estimated dispersion, in other words the variation in offset between samples.

Closer to 0s is better. An ideal system would be a horizontal line at 0s.

RMS Jitter is field 8 in the peerstats log file.



Server Jitter 204.17.205.1

peer jitter 204.17.205.1 plot

Percentiles...... Ranges...... Skew- Kurt-
Name Min1%5%50%95% 99%Max   90%98%StdDev  MeanUnits nessosis
Server Jitter 204.17.205.1 0.907 2.261 3.707 13.084 50.306 106.672 151.945 46.599 104.411 19.487 18.749 µs 3.129 15.91

The RMS Jitter of a server. Jitter is the current estimated dispersion, in other words the variation in offset between samples.

Closer to 0s is better. An ideal system would be a horizontal line at 0s.

RMS Jitter is field 8 in the peerstats log file.



Server Jitter 204.17.205.30

peer jitter 204.17.205.30 plot

Percentiles...... Ranges...... Skew- Kurt-
Name Min1%5%50%95% 99%Max   90%98%StdDev  MeanUnits nessosis
Server Jitter 204.17.205.30 1.853 2.044 3.277 12.630 106.459 211.452 246.332 103.182 209.408 37.735 27.011 µs 2.015 9.767

The RMS Jitter of a server. Jitter is the current estimated dispersion, in other words the variation in offset between samples.

Closer to 0s is better. An ideal system would be a horizontal line at 0s.

RMS Jitter is field 8 in the peerstats log file.



Server Jitter 2405:fc00::1 (robusta.dcs1.biz)

peer jitter 2405:fc00::1 plot

Percentiles...... Ranges...... Skew- Kurt-
Name Min1%5%50%95% 99%Max   90%98%StdDev  MeanUnits nessosis
Server Jitter 2405:fc00::1 (robusta.dcs1.biz) 0.187 0.250 0.330 0.779 5.569 13.863 14.023 5.239 13.613 2.297 1.539 ms 2.783 14.71

The RMS Jitter of a server. Jitter is the current estimated dispersion, in other words the variation in offset between samples.

Closer to 0s is better. An ideal system would be a horizontal line at 0s.

RMS Jitter is field 8 in the peerstats log file.



Server Jitter 2604:a880:1:20::17:5001 (ntp1.glypnod.com)

peer jitter 2604:a880:1:20::17:5001 plot

Percentiles...... Ranges...... Skew- Kurt-
Name Min1%5%50%95% 99%Max   90%98%StdDev  MeanUnits nessosis
Server Jitter 2604:a880:1:20::17:5001 (ntp1.glypnod.com) 0.131 0.203 0.292 0.639 2.154 3.554 3.936 1.862 3.351 0.624 0.849 ms 3.245 12.3

The RMS Jitter of a server. Jitter is the current estimated dispersion, in other words the variation in offset between samples.

Closer to 0s is better. An ideal system would be a horizontal line at 0s.

RMS Jitter is field 8 in the peerstats log file.



Server Jitter 2606:4700:f1::1 (time.cloudflare.com)

peer jitter 2606:4700:f1::1 plot

Percentiles...... Ranges...... Skew- Kurt-
Name Min1%5%50%95% 99%Max   90%98%StdDev  MeanUnits nessosis
Server Jitter 2606:4700:f1::1 (time.cloudflare.com) 0.139 0.160 0.225 0.468 1.725 4.529 4.818 1.499 4.369 0.662 0.673 ms 3.744 20.12

The RMS Jitter of a server. Jitter is the current estimated dispersion, in other words the variation in offset between samples.

Closer to 0s is better. An ideal system would be a horizontal line at 0s.

RMS Jitter is field 8 in the peerstats log file.



Server Jitter SHM(0)

peer jitter SHM(0) plot

Percentiles...... Ranges...... Skew- Kurt-
Name Min1%5%50%95% 99%Max   90%98%StdDev  MeanUnits nessosis
Server Jitter SHM(0) 0.138 0.312 0.436 1.040 2.599 7.139 24.819 2.162 6.827 1.383 1.321 ms 7.291 80.76

The RMS Jitter of a server. Jitter is the current estimated dispersion, in other words the variation in offset between samples.

Closer to 0s is better. An ideal system would be a horizontal line at 0s.

RMS Jitter is field 8 in the peerstats log file.



Summary


Percentiles...... Ranges...... Skew- Kurt-
Name Min1%5%50%95% 99%Max   90%98%StdDev  MeanUnits nessosis
Local Clock Frequency Offset 11.583 11.603 11.666 11.910 13.423 13.471 13.479 1.757 1.868 0.490 12.053 ppm 1.326e+04 3.15e+05
Local Clock Time Offset -373.416 -258.139 -98.239 -3.755 102.699 250.698 328.579 200.938 508.837 70.993 -1.315 µs -3.946 17.86
Local RMS Frequency Jitter 2.899 4.218 5.703 13.898 91.920 113.333 138.153 86.217 109.115 26.536 25.606 ppb 1.734 5.449
Local RMS Time Jitter 9.459 10.073 12.096 23.008 58.980 79.038 89.928 46.884 68.965 15.027 27.316 µs 4.511 14.5
Server Jitter 2001:470:e815::24 (pi4.rellim.com) 2.075 3.483 5.999 16.780 65.116 102.991 117.037 59.117 99.508 20.064 23.372 µs 2.622 9.631
Server Jitter 2001:470:e815::8 (spidey.rellim.com) 1.628 2.492 3.472 8.864 56.158 111.985 150.391 52.686 109.493 19.450 15.658 µs 2.868 15.16
Server Jitter 2001:67c:1270:0:dea6:32ff:feaf:803b (khronos.mikieboy.net) 0.153 0.230 0.282 0.726 4.345 7.437 19.848 4.063 7.206 1.989 1.353 ms 4.808 42.13
Server Jitter 204.17.205.1 0.907 2.261 3.707 13.084 50.306 106.672 151.945 46.599 104.411 19.487 18.749 µs 3.129 15.91
Server Jitter 204.17.205.30 1.853 2.044 3.277 12.630 106.459 211.452 246.332 103.182 209.408 37.735 27.011 µs 2.015 9.767
Server Jitter 2405:fc00::1 (robusta.dcs1.biz) 0.187 0.250 0.330 0.779 5.569 13.863 14.023 5.239 13.613 2.297 1.539 ms 2.783 14.71
Server Jitter 2604:a880:1:20::17:5001 (ntp1.glypnod.com) 0.131 0.203 0.292 0.639 2.154 3.554 3.936 1.862 3.351 0.624 0.849 ms 3.245 12.3
Server Jitter 2606:4700:f1::1 (time.cloudflare.com) 0.139 0.160 0.225 0.468 1.725 4.529 4.818 1.499 4.369 0.662 0.673 ms 3.744 20.12
Server Jitter SHM(0) 0.138 0.312 0.436 1.040 2.599 7.139 24.819 2.162 6.827 1.383 1.321 ms 7.291 80.76
Server Offset 2001:470:e815::24 (pi4.rellim.com) -372.609 -193.805 -71.739 17.140 131.717 277.087 388.032 203.456 470.892 72.786 20.372 µs -2.176 13.18
Server Offset 2001:470:e815::8 (spidey.rellim.com) -410.010 -285.729 -185.593 -37.440 94.507 215.661 312.331 280.100 501.390 90.601 -36.888 µs -7.076 21.21
Server Offset 2001:67c:1270:0:dea6:32ff:feaf:803b (khronos.mikieboy.net) -3.291 -2.261 -0.871 -0.437 0.017 1.543 3.757 0.888 3.804 0.501 -0.423 ms -10.35 48.42
Server Offset 204.17.205.1 -569.701 -545.227 -499.809 -28.056 189.833 244.762 319.862 689.642 789.989 210.391 -71.236 µs -7.08 20.06
Server Offset 204.17.205.30 -416.920 -265.211 -86.800 -31.872 79.482 267.695 307.375 166.282 532.906 70.553 -27.679 µs -6.438 26.02
Server Offset 2405:fc00::1 (robusta.dcs1.biz) -2.787 -0.932 -0.371 0.138 1.004 2.260 3.020 1.375 3.192 0.526 0.208 ms -1.345 11.4
Server Offset 2604:a880:1:20::17:5001 (ntp1.glypnod.com) -2.350 -2.156 -1.894 -1.509 -0.859 1.005 1.501 1.035 3.161 0.413 -1.459 ms -103.7 510
Server Offset 2606:4700:f1::1 (time.cloudflare.com) -0.440 -0.096 0.102 0.453 0.870 1.608 2.871 0.768 1.705 0.292 0.468 ms 4.433 27.72
Server Offset SHM(0) -161.730 -139.259 -136.892 -131.115 -124.697 -123.005 -119.921 12.195 16.254 3.875 -130.900 ms -4.218e+04 1.471e+06
Temp /dev/sda 46.000 46.000 46.000 48.000 48.000 49.000 49.000 2.000 3.000 0.800 47.495 °C
Temp /dev/sdb 35.000 35.000 35.000 36.000 37.000 37.000 37.000 2.000 2.000 0.667 36.355 °C
Temp LM0 49.000 49.000 49.000 54.000 58.000 59.000 59.000 9.000 10.000 2.864 53.850 °C
Temp LM1 43.375 43.500 43.625 44.625 73.625 74.625 76.875 30.000 31.125 9.961 49.362 °C
Temp LM10 25.000 25.000 25.000 25.000 25.000 25.000 26.000 0.000 0.000 0.059 25.003 °C
Temp LM11 63.000 63.000 63.000 63.000 64.000 65.000 65.000 1.000 2.000 0.526 63.470 °C
Temp LM12 3.000 4.000 5.000 10.000 14.000 18.000 19.000 9.000 14.000 2.674 10.387 °C
Temp LM13 25.000 25.000 25.000 25.000 25.000 25.000 26.000 0.000 0.000 0.059 25.003 °C
Temp LM14 44.000 44.000 44.000 45.000 46.000 46.000 46.000 2.000 2.000 0.525 44.990 °C
Temp LM15 37.000 37.000 38.000 38.000 62.000 63.000 66.000 24.000 26.000 8.037 41.951 °C
Temp LM16 68.000 68.000 68.000 69.000 69.500 69.500 69.500 1.500 1.500 0.368 68.794 °C
Temp LM17 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 °C
Temp LM18 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 °C
Temp LM19 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 °C
Temp LM2 43.500 43.500 43.750 45.500 72.750 75.000 75.500 29.000 31.500 9.443 49.583 °C
Temp LM20 43.375 43.500 43.625 44.625 73.625 74.625 76.875 30.000 31.125 9.963 49.340 °C
Temp LM21 68.250 68.250 68.375 69.000 69.500 69.750 69.750 1.125 1.500 0.313 68.909 °C
Temp LM22 35.000 35.000 35.000 37.000 37.000 37.000 37.000 2.000 2.000 0.651 36.470 °C
Temp LM23 64.850 65.850 65.850 69.850 70.850 70.850 71.850 5.000 5.000 1.519 69.191 °C
Temp LM3 46.000 46.000 46.000 48.000 48.000 49.000 49.000 2.000 3.000 0.796 47.505 °C
Temp LM4 49.850 49.850 49.850 50.850 51.850 52.850 54.850 2.000 3.000 0.579 50.927 °C
Temp LM5 49.850 49.850 49.850 50.850 51.850 52.850 54.850 2.000 3.000 0.590 50.934 °C
Temp LM6 56.850 57.850 57.850 59.850 61.850 66.850 72.850 4.000 9.000 1.561 59.752 °C
Temp LM7 49.850 49.850 49.850 50.850 51.850 52.850 54.850 2.000 3.000 0.574 50.944 °C
Temp LM8 44.000 44.000 44.000 45.000 46.000 46.000 46.000 2.000 2.000 0.518 44.983 °C
Temp LM9 37.500 37.500 38.000 38.500 51.500 52.000 52.000 13.500 14.500 3.974 40.143 °C
Summary as CSV file


This server:

Motherboard:
OS: Gentoo unstable
GPS/PPS server: gpsd
NTP server: NTPsec
../ntp.conf

Notes:

Feb 21 03:28:57 UTC 2019: New install

Glossary:

frequency offset:
The difference between the ntpd calculated frequency and the local system clock frequency (usually in parts per million, ppm)
jitter, dispersion:
The short term change in a value. NTP measures Local Time Jitter, Refclock Jitter, and Server Jitter in seconds. Local Frequency Jitter is in ppm or ppb.
kurtosis, Kurt:
The kurtosis of a random variable X is the fourth standardized moment and is a dimension-less ratio. ntpviz uses the Pearson's moment coefficient of kurtosis. A normal distribution has a kurtosis of three. NIST describes a kurtosis over three as "heavy tailed" and one under three as "light tailed".
ms, millisecond:
One thousandth of a second = 0.001 seconds, 1e-3 seconds
mu, mean:
The arithmetic mean: the sum of all the values divided by the number of values. The formula for mu is: "mu = (∑xi) / N". Where xi denotes the data points and N is the number of data points.
ns, nanosecond:
One billionth of a second, also one thousandth of a microsecond, 0.000000001 seconds and 1e-9 seconds.
percentile:
The value below which a given percentage of values fall.
ppb, parts per billion:
Ratio between two values. These following are all the same: 1 ppb, one in one billion, 1/1,000,000,000, 0.000,000,001, 1e-9 and 0.000,000,1%
ppm, parts per million:
Ratio between two values. These following are all the same: 1 ppm, one in one million, 1/1,000,000, 0.000,001, and 0.000,1%
‰, parts per thousand:
Ratio between two values. These following are all the same: 1 ‰. one in one thousand, 1/1,000, 0.001, and 0.1%
refclock:
Reference clock, a local GPS module or other local source of time.
remote clock:
Any clock reached over the network, LAN or WAN. Also called a peer or server.
time offset:
The difference between the ntpd calculated time and the local system clock's time. Also called phase offset.
σ, sigma:
Sigma denotes the standard deviation (SD) and is centered on the arithmetic mean of the data set. The SD is simply the square root of the variance of the data set. Two sigma is simply twice the standard deviation. Three sigma is three times sigma. Smaller is better.
The formula for sigma is: "σ = √[ ∑(xi-mu)^2 / N ]". Where xi denotes the data points and N is the number of data points.
skewness, Skew:
The skewness of a random variable X is the third standardized moment and is a dimension-less ratio. ntpviz uses the Pearson's moment coefficient of skewness. Wikipedia describes it best: "The qualitative interpretation of the skew is complicated and unintuitive."
A normal distribution has a skewness of zero.
upstream clock:
Any server or reference clock used as a source of time.
µs, us, microsecond:
One millionth of a second, also one thousandth of a millisecond, 0.000,001 seconds, and 1e-6 seconds.



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