[riot-notifications] [RIOT-OS/RIOT] doc/rdm: RFC - design goals (#10162)
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Tue Jan 29 19:01:53 CET 2019
danpetry commented on this pull request.
> +Above the HAL, the only thing that modules should know about hardware is
+whether a required feature is there or not. If it isn't, the module should
+adapt accordingly, or not compile.
+## Real-time capabilities
+Different real-time guarantees are required for different use cases. Low
+frequency sensing needs only soft real-time support and can handle less timing
+accuracy so long as the timers support long timescales. High-frequency sensing
+and control applications need hard real-time guarantees and sub-millisecond
+RIOT should deliver soft real-time performance by default, to cover the widest
+range of use cases. Programs with hard deadlines should be achievable with more
+expertise. It should provide timers which can competently handle the timescales
+of any application.
I was informed by @haukepetersen IIRC that the tickless scheduler allows people to satisfy hard deadlines if they know what they're doing. Perhaps he can disambiguate?
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