Stack Sizing by powers of 2?

Kernel
1

Hello,

I know arbitrary stack size can be used but is there any particular benefit to keeping stack sizes in powers of 2 (e.g. 1024 → 2048 → 4096)? I am trying to optimize the space that I am using in RAM on my device and seeing where I can minimize my stack usage.

-Kevin

2

There is no real advantage to keeping stack sizes powers of 2. They should be a multiple of the heap allocation quantum (if dynamically created), or for a MPU restricted task, the MPU region quantum.

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3

As per richard-d - the programmable region size of some memory protection units (MPUs) are restricted to power of two sizes. The only time I would use a power of two stack is when using such an MPU to detect writes outside of the stack region.

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