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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. 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 and display its frequency distribution.
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To sitka.triumf.ca from SLAC
| Time Series | Frequency distribution RTT | Abs(IPD) | |
|---|---|---|---|
| pinger to sitka |  |  | |
| pinger-raspberry to sitka |  |
| Metric | pinger to pinger-raspberry | pinger-raspberry to pinger |
|---|---|---|
Min RTT | 0.43 ms | 0.41 ms |
| Avg RTT | 0.542 ms | 0.529 ms |
Max RTT | 1.15 ms | 20.8 ms |
| Median RTT | 0.542 ms | 0.51 ms |
| 25% | 0.514 ms | 0.48 ms |
| 75% | 0.564 ms | 0.532 ms |
| IQR | 0.05 ms | 0.052 ms |
| Min(abs(IPD)) | 0 ms | 0 ms |
| Avg(abs(IPD)) | 0.041 ms | 0.066 ms |
| Max(abs(IPD)) | 0.0628ms | 20.294 ms |
| Median(abs(IPD)) | 0.03ms | 0.024 ms |
| 25%(abs(IPD)) | 0.01ms | 0.008 ms |
| 75%(abs(IPD)) | 0.058 ms | 0.05 ms |
| IQR(abs(IPD) | 0.048 ms | 0.042 ms |
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