perfSONAR User Q&A and Other Discussion

[Ty Bell <>]

Hi All,

I’ve been using regular testing with bwping (owamp) and bwctl (iperf3). Every 
6 hours I run a 20 second 100Mbps UDP test, and what I’m seeing in the graphs 
are very large loss spikes when the UDP tests run. In the logs, I see the 
iperf3 test accepted at 20:56:01, it says 62 seconds until the results are 
available. I see 9 owamp processes exit (the final at 20:56:38), at 20:57:03 
the iperf3 test completes and then all of the owamp connections re-establish. 
During the iperf test, if I look at the process list, I can see iperf3 is the 
only thing running, no owamp or owping.

Any ideas what could be causing the loss? No errors or drops on the NICs.


Thanks,
Ty

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