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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 QNX Neutrino 7.1.

  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 7.1 of the Integrated Development Environment (IDE) that's part of the QNX Momentics 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 QNX Neutrino 7.1.

    • Quickstart Guide

    • OS Components & Operations

      • Adaptive Partitioning User's Guide

      • 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.

          • Reduce the size of the startup program

            Startup is small (roughly 45 KB), so it's difficult to trim much from it.

          • 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 Neutrino RTOS embedded systems.

      • Core Networking Stack User's Guide

        This guide introduces you to the QNX Neutrino Core Networking stack and its manager, io-pkt.

      • 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 Neutrino High-Performance Networking Stack and its manager, io-sock.

      • Instant Device Activation
      • Migrating to QNX SDP 7.1
      • PCI Server User's Guide

      • Persistent Publish/Subscribe Developer's Guide

      • Platform-independent Publish/Subscribe Developer's Guide

        This guide is intended for application developers who want to use the Platform-independent Publish Subscribe (PiPS) framework to exchange information with other applications. First, the overall PiPS design and data-exchange model are explained. Then, tutorials on using PiPS are given. These tutorials cover key tasks such as selecting a publish-subscribe provider to use and writing plugins that read and write custom data types.

      • QDB Developer's Guide
      • QNX Helpers Developer's Guide

        These libraries provide QNX helpers, including helpers that assist with logging, string conversion, and number and type sizes.

      • SMMUMAN User's Guide

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

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

      • Technotes
      • User's Guide

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

    • Audio & Graphics API

    • Multimedia

    • Networking Middleware

    • Programming

    • Sensor Framework

    • System Security Guide

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

    • Utilities & Libraries

  • QNX Hypervisor

    The QNX Hypervisor allows you to run multiple OSs on a target system so you can separate critical and non-critical functions, support a wide variety of applications, and reduce hardware costs.

  • QNX Software in the Cloud

    QNX Software in the Cloud enables developers to use the QNX software in Amazon Web Services (AWS) and Microsoft Azure (Azure).

  • QNX Advanced Virtualization Frameworks User's Guide

    This User's Guide is aimed at all systems integrators and developers who want to design and build embedded systems using the QNX Advanced Virtualization Frameworks.

  • Typographical Conventions, Support, and Licensing

    This section describes the typographical conventions used throughout the documentation and explains how to obtain technical support.

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.

These techniques are:

  • Optimize the bootloader
  • Optimize your image scan
  • Generic techniques to reduce the size of the IFS
  • Reduce the size of the startup program
  • Optimize use of system and secondary disks
  • Remove unnecessary debug printing
  • Use compression strategies
Page updated: March 12, 2026