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ANU-Rocketry / control-panel

Control panel for ANU Rocketry's liquid rocket engine testing platform
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Low power systems lag when polling UPS #26

Open Oliver-Bagin opened 1 year ago

Oliver-Bagin commented 1 year ago

I am not exactly sure what causes this issue but the Raspberry Pi lags a lot when the UPS is not connected. I suspect that this lag is due to the low compute of the Pi causing lag when trying to find the UPS. I think that we should block the software from showing if the UPS is not detected as it isn't safe to run the test stand.

OliverBalfour commented 1 year ago

Seeing as I did the UPS connection logic this is probably on me. What exactly is lagging? Is the front end laggy or does the latency blow up? It's possible I set up the pi with a 0 timeout for polling UPS status when disconnected or something silly like that that starves resources iff there's no UPS connection. I don't remember this being an issue before we introduced the UPS

Oliver-Bagin commented 1 year ago

Not sure exactly but it seems to me the entire Pi lags. The websocket stops responding at the very least and the frontend then lags. This lasts about 5 seconds and then works for about 2 seconds before freezing again for 5 seconds.

OliverBalfour commented 1 year ago

What happens if you comment out https://github.com/ANU-Rocketry/control-panel/blob/1226c754d4508af860321e404ba16ff18d343d77/src/server.py#L282 ?