About This 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.

A QNX system startup involves several stages of interdependent tasks. Every task takes time. Some of these tasks can be modified, moved to another point in the startup sequence, or even eliminated in order to achieve the optimal startup configuration for your system.

Every system has its own set of boot time requirements to meet. Depending on your goals, there are a number of ways you can optimize the startup of the system. By implementing some simple techniques at various stages in the boot sequence, you can make the OS and applications load, initialize, and launch more quickly.

The optimizations described in this guide are focused to help you achieve system goals such as:

early audio— start audio as early as possible to play a sound, such as a chime
show an HMI earlier (within 10 seconds)—load the minimum services to start the system and show the user a UI interface

To find out about:	See:
An overview of the system's boot sequence	About the System Startup Sequence
How to optimize the loading and launching of the OS itself	Optimizing the Loading and Launching of the OS
How to optimze the platform application stack	Optimizing the Platform Application Stack
How to measure boot times	Measuring Boot Times
How to optimze the system with graphics applications	Optimizing Screen Startup Times