Although there are versions of Linux that are hard-realtime, the approach they take is to have a proper RTOS "underneath" Linux and effectively run Linux as a n

Although there are versions of Linux that are hard-realtime, the approach they take is to have a proper RTOS "underneath" Linux and effectively run Linux as a non realtime process. Linux as a whole is far too large and dynamic for deterministic response. Linux does get used a lot for soft realtime applications tho, especially in the military world.