Linux Fast Boot

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Course Description

Course Results

Products Supported

Who Should Attend

Course Format

Please see course datasheet for further details here Buy Now

Course Details Summary

  • Duration: 2 Days
  • Course Information: View
  • Format: Lectures and Labs
  • Type: Instructor-led
  • Price/Schedule: View

The Linux Fast Boot course provides engineers with a fast, cost-effective way to acquire the skills necessary to improve startup times in their customized Linux devices.

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

  • Describe how a Linux device boots
  • Measure latencies at various stages of the boot cycle
  • Make design decisions that improve boot time
  • Modify kernel and bootloader source
  • Modify user-space initialization scripts
  • Optimize a device to improve boot times
  • Wind River® Linux 3.0.2 and common Linux technologies
  • Platform developers who intend to develop a Linux-based device
  • Developers interested in maximizing the initial end user perception of their device
  • Developers using Wind River Linux or other Linux variants

Day 1

Overview of Linux Boot Sequence

  • Introduction
  • Boot time terminology
  • Boot time contributors
    • Hardware initialization
    • Boot loader
    • Linux kernel initialization
    • User-space initialization
    • Application initialization
  • LAB: Development environment

User-Space and Application Initialization

  • Overview
  • Init
  • Role of init in booting
    • Device nodes
    • Modules
    • File systems
    • Services
  • Implementing init
    • Sysvinit
    • Event-based init systems
    • Dependency-based init systems
    • Systemd
    • Busybox init
    • Roll-your-own init
  • Profiling techniques
    • Bootchart
    • Process profiling
  • Optimization techniques
    • Readahead
    • Static linking
    • Prelinking
    • Compiler and toolchain tricks
  • LAB: Profiling and optimizing user-space initialization

Day 2

Linux Kernel Initialization

  • Overview
  • Kernel command line
  • System services and drivers
  • Root file system
    • initRAMfs
    • In-place file systems
    • Read-only file systems
  • Profiling techniques
  • Optimization techniques
  • LAB: Profiling and optimizing Linux kernel initialization

Boot Loader

  • Overview
  • Stages of boot loading
  • Loading the kernel
    • Compression
    • XIP
  • Initial RAM disks
  • Profiling techniques
  • Optimization techniques
  • LAB: Profiling and optimizing boot loader

Prerequisite Courses

Prerequisite Skills

  • Familiarity with the Linux kernel
  • Familiarity with embedded systems
  • C programming experience on Linux/UNIX
  • Experience working with shell scripts and makefiles
  • This two-day expert-led course consists of lectures and lab sessions.
  • Attendees use Wind River Linux 3.0.2 to gain experience with the topics presented.
  • Participants examine and exercise simulated network topologies in hands-on labs.
  • Participants use the included Linux distribution to compare boot times before and after applying course concepts.
  • Participants receive individual guidance from an expert engineer who has extensive experience with Wind River technologies.
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