Real-Time Operating System Exercises

Introduction

Unexplained delays while processing events are one of the biggest problems in real-time operating systems. This labs will bring you through a series of exercises to benchmark and gauge different latencies within the system.

There are many types of latency within an operating system.

• the time between when an interrupt occurs and the thread waiting for that interrupt is run

• the time between a timer expiration and the thread waiting for that timer to run

• The time between the receipt of a network packet and when the thread waiting for that packet runs

Usually, a tool is written to test a specific latency. In this lab, we will become familiar with a couple of these tools.

Table of Contents

• Introduction to Cyclictest and Hackbench

Concurency

• Introduction to PREEMPT-RT
• Affinity Tuning
• Real-Time Scheduling
• Power Management Firmware Tuning

Memory and IO

• Memory Management

Timing

• High Precision Timers