Real-Time Performance of Linux-Based Embedded Systems

Paper evaluates performance of embedded real-time system controlled by Linux. External events processing latency and its jitter were considered as a key parameters for these kind of systems.
Linux as a general purpose kernel is designed to maximize average throughput, whereas in real-time computing the time characteristics are crucial. In order to improve real-time behaviour of the Linux kernel two separate approaches have been tested.
Experiments were conducted on ARM9 based acquisition system designed and manufactured by Institute of Aviation. Obtained results proved that its possible to build hard real-time system based on modified Linux kernel.