What is POS management

POS (partition operation system) partition operation, in traditional embedded real-time operating systems, both the kernel and the application run at the same privilege level, and the application can have unrestricted access to the entire system address space.

In order to meet the requirements of avionics for high reliability, high availability and high serviceability, ARINC released ARINC653 (avionics application software standard interface) in January 1997, and released ARINC653 in July 2003 Supplement 1 provides additional explanations on interval management, interval communication and health monitoring to standardize the development of avionics equipment and systems.

Extended information:

Partitioning is a core concept in ARINC653. In the IMA (Integrated Modular Avionics) system, a core module will contain one or more avionics applications, and these applications must be able to operate independently. Partitioning is a functional division in avionics applications.

The unit of partition is called an interval, and each execution unit within the interval is called a process. Each interval has its own independent data, context and operating environment. The advantage of this is that it can prevent errors in one interval from affecting other intervals. In addition, it makes the entire system easy to verify, validate and authenticate.

The traditional operating system is divided into two levels using arinc standard operating system design principles. One is CoreOS, whose task is intervalization and interval management and scheduling. The upper layer of CoreOS is POS, which is a partition operating system. At the upper level of POS is the execution of the application.

Baidu Encyclopedia-POS (Partition Operation)