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OpenFogStack / celestial

Virtual Software System Testbeds for the LEO Edge
https://openfogstack.github.io/celestial
GNU General Public License v3.0
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Problems in experiment #12

Closed ykxian closed 10 months ago

ykxian commented 10 months ago

I'm back to trouble you once more. I encountered some problems when I started the experiment. The problems might be associated with iptables. image image image image image The experiment ran for 15 minutes, and there were undoubtedly issues with the results. image Thanks for your help.

pfandzelter commented 10 months ago

Hi, I have actually seen this issue before, but I have never been able to replicate it. Please try the version of Celestial in the tp/iptables-race-condition branch, which should patch this issue. Unfortunately I can't merge this into main until I have found the underlying root cause. Thanks!

ykxian commented 10 months ago

Thanks! I will try again following your advice.

ykxian commented 10 months ago

It seems there are still some problems. image image image

pfandzelter commented 10 months ago

Those errors can be ignored, it is a result of the default validation script (running on the emulated ground station) trying to figure out which satellites are active. It seems that other than that, everything is working fine

ykxian commented 10 months ago

There are still problems with the result analysis. image

pfandzelter commented 10 months ago

It seems that only a few measurements are impacted, with a few connections being blocked that shouldn't be (or the other way around). With the current version of Celestial, this is the best we can get unfortunately because the underlying network emulation is slow and error-prone.