> On Jan 9, 2019, at 2:54 PM, dwight via cctalk <cctalk@classiccmp.org> wrote:
>
> ...
> Of course in an embedded processor you can run in kernel mode and busy wait
> if you want.
Yes, and that has a number of advantages. You get well defined latencies and
everything that the program does gets done within bounded time (if you do the
simple thing of putting work limits on all your work loops). Knowing that your
real time system can't ever block a task is a very good property. By contrast,
with interrupts, never mind priority schedulers, it's much harder to ensure
this.
I've built network switches whose data paths were coded this way, and they are
both simple and reliable.
paul
