Soft realtime just needs fast responses within say 1/10 of the controlled system's smallest time constant. Most modern CPUs are fast enough for that even with elefantine Linux OS, no RTOS required. Hard realtime (e.g. for safety apps) needs interrupt handlers, triggered by hardware signals or software signals or timers. You need extra mechanisms (drivers and/or RTOS) beyond the programming language of choice (often with some assembler thrown in)
So R-Pi for soft realtime applications seems okay. Am Donnerstag, 3. Januar 2019 01:57:16 UTC+1 schrieb Pat Farrell: > > On Wednesday, January 2, 2019 at 7:23:49 PM UTC-5, Wim Lewis wrote: >> >> Go's GC pauses and Linux's preemptions make them bad choices for this if >> occasional random failures are unacceptable, but in practice, for tinkering >> purposes, I think they're both fine --- > > > That is my current thinking, do it in go, learn and if when I get smarter, > I find it doesn't work, I can adjust. > I've already learned to use 20 or 30 languages, so learning a couple more > is not a big deal. > I know that python has a lot of fans, but go meets my theology far better > than python > > Plus Rob Pike keeps saying that the GC is getting better every release and > I believe in Rob Pike > > > > 2) what hardware should I use? RaspberryPI, or some super Arduino? or a >> more specific microcontroller, perhaps controlled by a R-PI? >> >> RasPIs are cheap and have a large community, but are a little weak at >> I/O. I'm a big fan of the Beaglebone, which is not quite at RasPI's level > > > I'm going to start with an R-Pi, and see. Weak at IO matches up nicely > with Linux's refusal to really do real time. I half expected everyone to > yell "you have to use a RTOS" but that hasn't happened. Maybe all the RTOS > folks have already rejected go. I've done far too much professional C, I > have no interest in doing it for fun. > > -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
