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[Darwin] MTRDevice estimate start time based on General Diagnostics UpTime attribute when present #26583
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[Darwin] MTRDevice estimate start time based on General Diagnostics UpTime attribute when present #26583
andy31415
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May 18, 2023
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PR #26583: Size comparison from b4fb147 to 55626ab Increases (6 builds for bl602, bl702, cc32xx, psoc6)
Decreases (1 build for qpg)
Full report (36 builds for bl602, bl702, cc32xx, cyw30739, k32w, linux, mbed, nrfconnect, psoc6, qpg)
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…pTime attribute when present
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PR #26583: Size comparison from b4fb147 to 956cf58 Increases (14 builds for bl602, bl702, cc32xx, psoc6, telink)
Decreases (8 builds for esp32, psoc6, telink)
Full report (57 builds for bl602, bl702, cc32xx, cyw30739, efr32, esp32, k32w, linux, mbed, nrfconnect, psoc6, qpg, telink)
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MTRDevice currently estimates device start time (for devices that don't have a wall clock) by subtracting the event time value from "now". This estimate can get better over time as events get reported, but initially could be off by a lot, if there are no freshly generated events in the priming report at subscription establishment time.
This change improves the estimate by making an estimated start time if the General Diagnostics UpTime attribute is seen in the priming report, and at OnSubscriptionEstablished callback, update the estimate if it's better.
Note for reviewer: the
MTRTimeIntervalForEventTimestampValue
function needed to be moved so the compiler is not confused about multiple definitions, now that it's exported forMTRDevice.mm
to also use.