Real-Time Java™ Programming with Java RTS

5Threads, Scheduling, and New Memory Models

“The only reason for time is so that everything doesn’t happen at once.”

—Albert Einstein

IN a real-time environment, it’s important to ensure the timely and predictable execution of tasks. This implies that the system make conscious decisions about priorities, resource usage profiles, and latency requirements when scheduling individual tasks, or threads. Java RTS works closely with its host operating system to properly schedule threads to achieve the deadlines of all running tasks. It begins with a Schedulable object, for which there are four types in the Java RTS system, controlled by a real-time scheduler.

This chapter begins with a discussion of thread priorities and the effect that shared resources ...