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BNN-UPC / datanetAPI

Apache License 2.0
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avgDelay is -1 #8

Open Magnido9 opened 1 year ago

Magnido9 commented 1 year ago

Hello, we are using this api in our project , and we noticed that some flows in high bandwidth demands get a delay of -1 for some reason, could you by any chance explain to us why this is happening? thanks :D

albert-lopez commented 1 year ago

Hello, This could happen when no packet has reached its destination . Or no packets have been generated for the affected path or all of them have been lost. It could happen specially if you are using Strict Priority scheduling policies. Regards Albert

Magnido9 commented 1 year ago

Hello, This could happen when no packet has reached its destination . Or no packets have been generated for the affected path or all of them have been lost. It could happen specially if you are using Strict Priority scheduling policies. Regards Albert

Hi Albert, thank you for your quick response, we checked and for the flows that have -1 delay most packets were lost but not all of them(we calculated it's always 99.8% loss or higher but not 100%), do you by any chance know why it happens then?

albert-lopez commented 1 year ago

Not really, It would be possible to have the data used to generate this sample? The Network_topology.ned, routing.txt and traffic.txt in order to try to reproduce the problem? The API only reads the data generated with the simulator so the problem should come from the simulator.

albert-lopez commented 1 year ago

I have observed a particular behavior in our simulation. Specifically, at the conclusion of a simulation, packets that reside within the queue of devices are indeed removed, but they are not dropped. I'm considering the possibility that the disparity between the number of packets generated and the number of packets dropped may be less than the number of packets present in the buffers of the devices along the path. If this is the case, it could explain the 0.2% discrepancy we're observing.