Python on an Real-Time Operation System (RTOS)

Question

I am planning to implement a small-scale data acquisition system on an RTOS platform. (Either on a QNX or an RT-Linux system.)

As far as I know, these jobs are perfo

Answer 1

Generally the reason advanced against using a high-level language in a real-time context is uncertainty -- when you run a routine one time it might take 100us; the next time you run the same routine it might decide to extend a hash table, calling malloc, then malloc asks the kernel for more memory, which could do anything from returning instantly to returning milliseconds later to returning seconds later to erroring, none of which is immediately apparent (or controllable) from the code. Whereas theoretically if you write in C (or even lower) you can prove that your critical paths will "always" (barring meteor strike) run in X time.