Home
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
QNX Process Launch and Monitor Service User's Guide
The QNX Process Launch and Monitor Service (QPLMS) user's guide is intended for developers who are implementing the service in a QNX OS-based system.
QPLMS usage differences between QOS 2.2.x and SDP 8.x environments

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.
  - 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
  - QNX Filesystem for Safety User's Guide
  - QNX Process Launch and Monitor Service User's Guide
    The QNX Process Launch and Monitor Service (QPLMS) user's guide is intended for developers who are implementing the service in a QNX OS-based system.
    - QNX Process Launch and Monitor Service (QPLMS) overview
      QPLMS manages and optimizes process execution by launching dependency-driven components — often in parallel — using an action queue and worker threads to support both automated and user-triggered tasks.
    - Configure QPLMS
    - QPLMS usage differences between QOS 2.2.x and SDP 8.x environments
    - Configuration file changes between QPLMS versions
  - 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 software in Amazon Web Services (AWS) and Microsoft Azure (Azure).
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 and QNX Hypervisor for Safety
The QNX Hypervisor and QNX Hypervisor for Safety products allow 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.
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.

QPLMS usage differences between QOS 2.2.x and SDP 8.x environments

QPLMS provides binaries for both QOS 2.2.x and SDP/QOS 8.x.

There are some differences in how the configuration file and command line arguments work between the two SDP major versions:


Config file keyword	Description
aps	The aps keyword only works on QOS 2.2.x. The feature is not supported in SDP 8.x.
priority	Priority ranges differ when running on SDP 8.x: Range of priority is 1-253. For sporadic scheduling, the range of priority is 2-253. For sporadic scheduling, the range of low_priority is 1-252.
rlimits	The following rlimits are only applicable when running on SDP 8.x: CHANNELS MQUEUE_NUM MQUEUE_SIZE SHM_HANDLES
rumask	This keyword is only supported on QOS 2.2.x. Use cluster if you are running on SDP 8.0 or greater.
cluster	This keyword is only supported on SDP 8.x. Use runmask if you are running on QOS 2.2.x.


Command-line argument	Description
-W	The -W argument that is used to specify the runmask used by the worker threads only works with QOS 2.2.x.
-C	The -C argument that is used to specify the cluster used by the worker threads only works with SDP 8.x
-p	In SDP 8 the range for priority is 1-253.
-U	In SDP 8 a username can be used instead of the UID as long as the username is defined in /etc/passwd.

Page updated: June 11, 2026