Re: Lua on NuttX blog posts

[Fotis Panagiotopoulos <f....@gmail.com>]

Oops, sorry I missed this email.

Coroutines is a standard Lua library, included in the official code.
More information here: http://www.lua.org/pil/9.1.html.

I haven't examined the internals of this library yet. It may indeed have
excessive memory requirements, or it may be that the tests are pretty
extreme and exhaustive.
I will have to test a real-life application on an actual MCU, to see what
is actually happening.

But till now, Lua was very polite on my stacks.

On Mon, Aug 29, 2022 at 12:57 AM Gregory Nutt <sp...@gmail.com> wrote:

> One thing that I found odd is the excessive stack usage of the coroutines
> > library.
> > On the simulator I had to set the stack to 1M.
> >
> > I am afraid that this specific library may not be usable on actual MCU
> > systems...
> >
>
> Is this a Linux library?
>
> I have seen this kind of stack usage a few time when code written for Linux
> is ported to NuttX.  Linux code sometimes allocates huge arrays on the
> stack.  This is harmless on Linux since the stack is virtualized and only
> backed by RAM if actually used.  But it can cause catastrophic memory usage
> in an embedded system with a flat address space.
>