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Questions about illogical results on opensand 3.0

 

Hi,

We have carried out some test on opensand 3.0 and we have already obtained strange results. Indeed we have made a ping sending 500 Bytes each 4ms from a terminal to the gateway (equivalent to an average throughput of 1Mb/s in theory) and with the collector we have observed the attached plots showing an average throughput of about 0.5Mb/s.
The command we are using for the ping is:
ping -s 500 -i 0.004 192.168.42.3 -c 1000
Moreover in each test we have launched, there is a strange peak at 6000000 kb/s at the beginning of the simulation in the throughput signal between the terminal and the satellite emulator, I think it must be an error in the opensand-collector. Another question : since we have sent 1000 paquets every 4ms, the expected simulation time must be 4s. However the simulation lasts 8s, according to the collector.

Sincerly yours, François&Jonas

Attachment: 500octets_4ms.svg
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Attachment: 500octets_4ms_2.svg
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