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  2. QNX Software Development Platform

    QNX SDP is a cross-compiling and debugging environment, including an IDE and command-line tools, for building binary images and programs for target boards running the QNX OS 8.0.

  3. OS Components & Operations

  4. Boot Optimization Guide

    The Boot Optimization Guide describes techniques you can use to reduce the time from your board's initial power on until you have a fully functional QNX system running on the board.

  5. Optimizing the Loading and Launching of the OS

    This chapter presents optimization techniques you can apply in the bootup sequence that precedes the boot script.

  • QNX Momentics IDE User's Guide

    This User's Guide describes version 8.0 of the Integrated Development Environment (IDE) that's part of the QNX Tool Suite.

  • QNX Software Development Platform

    QNX SDP is a cross-compiling and debugging environment, including an IDE and command-line tools, for building binary images and programs for target boards running the QNX OS 8.0.

    • Quickstart Guide

    • System Architecture

      The System Architecture guide accompanies the QNX OS and is intended for both application developers and end-users.

    • OS Components & Operations

      • Boot Optimization Guide

        The Boot Optimization Guide describes techniques you can use to reduce the time from your board's initial power on until you have a fully functional QNX system running on the board.

        • About the System Startup Sequence

          The boot process consists of several tasks, each handled by a specialized component.

        • Optimizing the Loading and Launching of the OS

          This chapter presents optimization techniques you can apply in the bootup sequence that precedes the boot script.

          • Optimize the bootloader

            After developers get the system to boot for the first time, bootloader development is often neglected.

          • Optimize your image scan

            The IPL normally scans for a valid system image so that it can load that image into RAM.

          • Generic techniques to reduce the size of the IFS

            Techniques you can use to reduce the size of an IFS include removing unused executables, implementing symbolic links, and moving selected files to an external filesystem.

          • Remove unnecessary debug printing

            Callouts in either the IPL or the startup program handle any debug printing that happens early in the system boot (before the serial driver is loaded).

          • Optimize use of system and secondary disks

            You can reduce boot time by optimizing how you use system and secondary disks.

          • Use compression strategies

            You can either compress the entire IFS or compress individual files in the EFS.

        • Optimizing the Platform Application Stack

          This chapter present optimization techniques you can apply in the bootup sequence at, and after, the boot script.

        • Measuring Boot Times

          Before applying any of the techniques described here, always remember to get a stable baseline measurement of system boot speed.

        • Optimizing Screen Startup Times

          This chapter describes strategies and techniques that you can use to reduce the time between when you power on and when Screen is ready on your system.

      • Building Embedded Systems

        The Building Embedded Systems guide is intended for developers who are developing or building BSPs for QNX OS embedded systems.

      • Customizing a BSP

        While QNX provides Board Support Packages (BSPs) for many common platforms and their individual variants, in some cases, you need a BSP for a board that QNX does not provide. If this is the case, you can modify a QNX BSP or develop your own.

      • Device Publishers Developer's Guide
      • High Availability Framework Developer's Guide
      • High-Performance Networking Stack (io-sock) User's Guide

        This guide contains instructions for implementing and using the QNX OS High-Performance Networking Stack and its manager, io-sock.

      • PCI Server User's Guide

      • Performance Tuning User's Guide
      • SMMUMAN User's Guide

      • System Analysis Toolkit (SAT) User's Guide
      • Technotes
      • User's Guide

        The QNX OS User's Guide is intended for all users of a QNX OS system, from system administrators to end users.

    • Graphics

    • Programming

    • System Security Guide

      The QNX System Security Guide is intended for both system integrators who are responsible for the security of a QNX OS system and developers who want to create a QNX OS resource manager free from vulnerabilities.

    • Utilities & Libraries

    • Migrating to QNX OS 8.0
  • QNX Software in the Cloud

  • QNX Toolkit for Visual Studio Code

    This User's Guide describes the QNX® Toolkit for Visual Studio Code. The guide introduces you to the QNX Toolkit by explaining the QNX development environment and how to build, run, and debug your QNX® Operating System (OS) applications and systems.

  • Typographical Conventions, Support, and Licensing

    This section describes the typographical conventions used throughout the documentation, explains how to obtain technical support, and provides some information about licensing.

Optimizing the Loading and Launching of the OS

QNX SDP8.0Boot Optimization GuideDeveloper

This chapter presents optimization techniques you can apply in the bootup sequence that precedes the boot script.

These techniques are:

  • Optimize the bootloader
  • Optimize your image scan
  • Generic techniques to reduce the size of the IFS
  • Optimize use of system and secondary disks
  • Remove unnecessary debug printing
  • Use compression strategies
Page updated: August 09, 2024