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The magnitude of the RTT is very dependent on the distance of the path between the source and destination. Many applications such as voice over IP, video streaming, or haptics are very dependent on the variability or jitter of the RTT. The jitter is often more dependent on the network edges compared to the RTT. There are many ways to calculate the jitter (see for example http://www.slac.stanford.edu/comp/net/wan-mon/tutorial.html#variable). We calculate the absolute inter packet delay (IPD)and the absolute IPD and display its the frequency distributiondistributions and statistics.
| pinger to pinger-raspberry | pinger-raspberry to pinger | ||
|---|---|---|---|
| IPD |
|
| |
| Abs(IPD) |  |  |
To sitka.triumf.ca from SLAC
| Time Series | Frequency distribution RTT | Frequency distribution Abs(IPD) | |
|---|---|---|---|
| pinger to sitka |  |  |  |
| pinger-raspberry to sitka |  |  |  |
To CERN from SLAC
| Time series | Frequency distribution RTT | Frequency distribution Abs (ipd) | To wwwTo ping.cern | /.ch from pinger |  |   | To | wwwping.cern.ch from pinger-raspberry | ||
|---|---|---|---|---|---|---|---|---|---|---|
| Time series | |  | ||||||||
| Frequency Distribution RTT |
|   | ||||||||
Frequency Distribution Abs(IPD) |
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 | ||||||||
| Frequency Distribution IPD |
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Summary
| Metric | pinger to pinger-raspberry | pinger-raspberry to pinger | pinger to sitka | pinger-raspberry to sitka | pinger to CERN | pinger-raspberry to CERN |
|---|---|---|---|---|---|---|
Min RTT | 0.43 ms | 0.41 ms | 22 ms | 22.3 ms | 150 ms | 151 m2 |
| Avg RTT | 0.542 ms | 0.529 ms | 23.9 ms | 23.827 ms | 150.307 ms | 151.024 ms |
Max RTT | 1.15 ms | 20.8 ms | 761 ms | 334 ms | 288 ms | 183 ms |
| Median RTT | 0.542 ms | 0.51 ms | 22.3 ms | 22.7 ms | 150 ms | 151 ms |
| 25% | 0.514 ms | 0.48 ms | 22.2 ms | 22.69 ms | 149.99 ms | 150.99 ms |
| 75% | 0.564 ms | 0.532 ms | 22.4 ms | 22.8 ms | 151 ms | 151 ms |
| IQR | 0.05 ms | 0.052 ms | 0.2 ms | 0.11 ms | 1.01 ms | 0.01 ms |
| Min(abs(IPD)) | 0 ms | 0 ms | 0 ms | 0 ms | 0 ms | 0 ms |
| Avg(abs(IPD)) | 0.041 ms | 0.066 ms | 0.424 ms | 0.406 ms | 0.386 ms | 0.046 ms |
| Max(abs(IPD)) | 0.0628ms | 20.294 ms | 268 ms | 235.1 ms | 138 ms | 32 ms |
| Median(abs(IPD)) | 0.03ms | 0.024 ms | 0.09 ms | 0.1 ms | 0 ms | 0 ms |
| 25%(abs(IPD)) | 0.01ms | 0.008 ms | 0.01 ms | 0.01 ms | 0.01 ms | 0.01 ms |
| 75%(abs(IPD)) | 0.058 ms | 0.05 ms | 0.1 ms | 0.19 ms | 1 ms | 0 ms |
| IQR(abs(IPD) | 0.048 ms | 0.042 ms | 0.09 ms | 0.11 ms | 0.009 ms | 0.01 ms |
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