6. Real time

6.1 Definitions

The aim here is not to explain in detail what a real-time system is. We can, however, give a simple definition of such a system.

The notion of real-time is closely linked to embedded software, since virtually all proprietary embedded operating systems are real-time (VxWorks, pSOS, LynxOS, QNX, VRTX, etc.). Switching to Linux can pose a major problem, since like all UNIX systems, it is not real-time. As a result, task scheduling following priority assignment is not guaranteed by the Linux...