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.
Percentiles...... | Ranges...... | Skew- | Kurt- | |||||||||||||
Name | Min | 1% | 5% | 50% | 95% | 99% | Max | 90% | 98% | StdDev | Mean | Units | ness | osis | ||
Server Offset 192.12.19.20 | 252.196 | 252.196 | 252.196 | 252.196 | 252.196 | 252.196 | 252.196 | 0.000 | 0.000 | 0.000 | 252.196 | µs | nan | nan |
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.
Percentiles...... | Ranges...... | Skew- | Kurt- | |||||||||||||
Name | Min | 1% | 5% | 50% | 95% | 99% | Max | 90% | 98% | StdDev | Mean | Units | ness | osis | ||
Server Offset 204.34.198.40 | -16.236 | -16.236 | -16.236 | -16.124 | -16.124 | -16.124 | -16.124 | 0.112 | 0.112 | 0.056 | -16.180 | ms | -2.444e+07 | 7.091e+09 |
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.
Percentiles...... | Ranges...... | Skew- | Kurt- | |||||||||||||
Name | Min | 1% | 5% | 50% | 95% | 99% | Max | 90% | 98% | StdDev | Mean | Units | ness | osis | ||
Server Offset 2600:3c03::f03c:91ff:fe0c:601c (scratchy.podsix.net) | -916.040 | -916.040 | -916.040 | -916.040 | -916.040 | -916.040 | -916.040 | 0.000 | 0.000 | 0.000 | -916.040 | µs | nan | nan |
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.
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.
Percentiles...... | Ranges...... | Skew- | Kurt- | |||||||||||||
Name | Min | 1% | 5% | 50% | 95% | 99% | Max | 90% | 98% | StdDev | Mean | Units | ness | osis | ||
Server Jitter 192.12.19.20 | 241.534 | 241.534 | 241.534 | 241.534 | 241.534 | 241.534 | 241.534 | 0.000 | 0.000 | 0.000 | 241.534 | µs | nan | nan |
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.
Percentiles...... | Ranges...... | Skew- | Kurt- | |||||||||||||
Name | Min | 1% | 5% | 50% | 95% | 99% | Max | 90% | 98% | StdDev | Mean | Units | ness | osis | ||
Server Jitter 204.34.198.40 | 119.271 | 119.271 | 119.271 | 193.911 | 193.911 | 193.911 | 193.911 | 74.640 | 74.640 | 37.320 | 156.591 | µs | 42.23 | 166.6 |
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.
Percentiles...... | Ranges...... | Skew- | Kurt- | |||||||||||||
Name | Min | 1% | 5% | 50% | 95% | 99% | Max | 90% | 98% | StdDev | Mean | Units | ness | osis | ||
Server Jitter 2600:3c03::f03c:91ff:fe0c:601c (scratchy.podsix.net) | 197.537 | 197.537 | 197.537 | 197.537 | 197.537 | 197.537 | 197.537 | 0.000 | 0.000 | 0.000 | 197.537 | µs | nan | nan |
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.
Percentiles...... | Ranges...... | Skew- | Kurt- | |||||||||||||
Name | Min | 1% | 5% | 50% | 95% | 99% | Max | 90% | 98% | StdDev | Mean | Units | ness | osis | ||
Server Jitter 192.12.19.20 | 241.534 | 241.534 | 241.534 | 241.534 | 241.534 | 241.534 | 241.534 | 0.000 | 0.000 | 0.000 | 241.534 | µs | nan | nan | ||
Server Jitter 204.34.198.40 | 119.271 | 119.271 | 119.271 | 193.911 | 193.911 | 193.911 | 193.911 | 74.640 | 74.640 | 37.320 | 156.591 | µs | 42.23 | 166.6 | ||
Server Jitter 2600:3c03::f03c:91ff:fe0c:601c (scratchy.podsix.net) | 197.537 | 197.537 | 197.537 | 197.537 | 197.537 | 197.537 | 197.537 | 0.000 | 0.000 | 0.000 | 197.537 | µs | nan | nan | ||
Server Offset 192.12.19.20 | 252.196 | 252.196 | 252.196 | 252.196 | 252.196 | 252.196 | 252.196 | 0.000 | 0.000 | 0.000 | 252.196 | µs | nan | nan | ||
Server Offset 204.34.198.40 | -16.236 | -16.236 | -16.236 | -16.124 | -16.124 | -16.124 | -16.124 | 0.112 | 0.112 | 0.056 | -16.180 | ms | -2.444e+07 | 7.091e+09 | ||
Server Offset 2600:3c03::f03c:91ff:fe0c:601c (scratchy.podsix.net) | -916.040 | -916.040 | -916.040 | -916.040 | -916.040 | -916.040 | -916.040 | 0.000 | 0.000 | 0.000 | -916.040 | µs | nan | nan |