Wind River Education Services Course Catalog

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Linux Real-Time Essentials Using PREEMPT_RT

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Course Details Summary

  • Duration: 1 Days
  • Course Information: View
  • Format: Lectures and Labs
  • Type: Instructor-led
  • Price/Schedule: View

The Linux Real-Time Essentials Using PREEMPT_RT course provides engineers with a fast, cost-effective way to acquire the skills to develop and deploy real-time, efficient Linux-based platforms and applications by utilizing the Wind River® PREEMPT_RT Linux kernel. Attendees get an in-depth look at Linux internals, which affect realtime characteristics of the system, and will learn how to configure the real-time kernel and file system, develop real-time applications, and use various tools to evaluate the real-time characteristics.

After this course, participants will be able to perform the following:

  • Develop and deploy real-time kernels and user space applications
  • Analyze real-time characteristics and find causes for non-realtime behavior
  • Understand Linux internals related to real-time
  • Understand the PREEMPT_RT kernel configuration option
  • Linux kernel versions 2.6 and newer
  • Yocto Project Linux
  • Wind River Linux 9
  • Kernel developers who want to understand Linux kernel internals, which affect system real-time behavior, or evaluate and optimize real-time characteristics of the system platform
  • Application developers who want to develop efficient real-time applications and evaluate real-time characteristics of the developed application code

Day 1

Real-Time Fundamentals

  • Real-time basics
  • Latency and jitter
  • Kernel preemption

Processes and Synchronization

  • Linux processes and threads
  • Atomic operators
  • Memory fence
  • Spinlocks
  • Semaphores
  • Mutexes
  • Futexes
  • CPU variables
  • Read/write locks
  • Read-copy update

Scheduling and Priorities

  • Scheduling
  • O(N) scheduler
  • CFS scheduler
  • Scheduling policies
  • RT scheduling
  • Process priorities

Internals of the PREEMPT_RT Option

  • Preemption modes
  • The PREEMPT_RT patch
  • Priority inversion and inheritance
  • IRQ threads
  • IRQ thread development guidelines

Developing Linux Real-Time Applications

  • Real-time application development
  • Memory management
  • Thread management
  • Scheduling management
  • Application development guidelines

Linux Real-Time Tools

  • Latency measurement
  • Overall system measurement
  • System real-time fine-tuning
  • System benchmarking
  • System tracing
  • LAB: Configuring and Building a Wind River Linux Preemptable Kernel
  • LAB: Optimizing Memory Access Performance in an Application
  • LAB: Evaluating Wind River Linux Kernels with ftrace
  • LAB: Evaluating a Real-time System with cyclictest
  • LAB: Tuning the Platform for Real-Time Performance
  • LAB: Manipulating Scheduling Policies and Priorities

Prerequisite Courses

  • None

Prerequisite Skills

  • Basic knowledge about the Linux operating system and Linux application or platform development
  • This one-day, expert-led add-on session consists of lectures and lab sessions.
  • Attendees use the Wind River Linux development environment combined with actual hardware targets to gain experience with the topics presented.
  • Participants receive individual guidance from an expert engineer who has extensive experience with Wind River technologies.
  • This course is only available as an add-on session to augment other Wind River courses. It is not available as a standalone course.