RTOS vs Linux Is Not Just About Size
When comparing an RTOS and Linux, people often start with an intuitive difference: an RTOS is small, Linux is large.
That is true, but too coarse. What affects engineering choices and debugging is not binary size alone. It is the different problems they are designed to solve by default.
An RTOS is common in resource-constrained device-side systems with clear response paths and fixed control cycles. Linux is common when resources are richer and the system needs process isolation, network stacks, filesystems, complex drivers, and application ecosystems.
Read More