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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.
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.
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 Software in the Cloud enables developers to use the QNX OS in the Amazon cloud environment.
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.
QNX Hypervisor User's Guide
This User's Guide explains the QNX hypervisor architecture and provides instructions for installing and running a QNX Hypervisor system, changing system components and configuration, and using hypervisor features such as virtual devices (vdevs).
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:

Page updated: March 05, 2025