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The output is in comma separated value format and is exported to Excel (one file for IPv4, one for IPv6) where it is analyzed to look at the histograms of Average(ping_rtt) -and Average(nping_rtt) etc. The script was run from a host (pinger.slac.stanford.edu) located st SLAC in Northern California in the San Francisco Bay Area. It was run multiple times to ensure the behaviour was not dependent on time of day or day of week etc. To ensure the selected target hosts were not unique in some respect we also obtained a list of target hosts from the perfSONAR project, and repeated the analysis for them. Finally to ensure there was not something unique about making the measurements from SLAC, we repeated the measurements to the same sets of targets from MAs in China, Malaysia and Thailand.
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For the IPv4 data measurements using the list of PingER hosts, for the IPv4 hosts the script ran for about 6 hours and 45 minutes. The distribution histograms shown below show that the agreement between ping and nping average RTT is good:
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