Hard-Soft Real-Time Performance Evaluation of Linux RTAI Based Embedded Systems

摘要

This article presents a few practical results obtained by testing a specific hardware architecture based on one of the most popular operating systems, Linux. We also added a real time extension to see if it suits the demands of a Hard or Soft real-time system. Real-time systems are a bit different from the classical ones because they have to offer a certain response within a specified time period. With real-time systems, correct execution of tasks will depend not only on the correctness of the results but also on the time when they are provided. Unlike soft real-time where deadline miss is not a major problem, missing a time constraint in a hard real-time system can cause severe material damage or even human health injury [5],[10].