Two power budget patches #5
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If the new power_budget setting is set to anything larger than zero, we will ignore the official power budget based on the supply 802.3 type. This is useful when a bunch of powered devices slightly peak when they all boot at the same time and we know that total consumption will otherwise be fine. Tested with an 802.3at injector as supply and four active-to-passive-PoE converters in front of three sxtsq-5-ac and one litebeam-ac-gen2. The official power budget of 21W for 802.3at supply only consistently powered on one device, often two, and rarely three. With power_budget=24 all four devices consistently boot up.
This wasn't long enough to consistently bring up one connected device above 8W, and one millisecond doesn't seem to be enough to bring up four devices above 8W each. Ten milliseconds seems to be the sweet spot.
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I have this deployed at a site [1] now, so if this power budget patch gets shipped to downloads.openwrt.org I could simplify the build for that site, which would be wonderful :-) [1] https://hopglass.berlin.freifunk.net/#!v:m;n:rixbox-core.olsr |
This was referenced Aug 12, 2022
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Hi, sorry for the long wait. This looks fine. |
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Two smallies, see the commit messages. Interested to see what you think about the config setting approach.
The second commit is of course only relevant for use cases that don't need to override power_budget and can instead use the default detection.