SRAM per core actually available to your program?

[CIB]

This might have been asked before, but I've gotten to think about the tight memory restriction again, and then I realized that assuming 32KB to be available to your program is probably a bit too optimistic.

So, how much memory is actually available to your program? This includes code and data. Phrased differently, how much space per core is needed for things not directly part of the program you compile yourself, such as interrupt handling, inter-core communication buffers(for a lack of the correct term), etc?

[notzed]

[CIB]

Thank you very much, that is a detailed description, and actually not as bad as I'd expected. So that leaves about 30KB for the code and data of your actual program.

[timpart]

The stack is also put into the on chip RAM (at the top unless you move it). Local variables for functions are stored there. If you have deep nesting of calls, e.g. recursion it may take up a notable amount of space.

The heap is in the slow external DRAM on many linker scripts. You might want to change that if you can spare the space.

None of the standard linker scripts takes advantage of code profiling identifying "hot" code.

Tim