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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 OS applications and systems.
Using the System Profiler
You can use the System Profiler to render different types of trace analysis, such as graphs and tables.

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 OS applications and systems.
- About the QNX Toolkit
- Using the Target Navigator
  The QNX development environment consists of a host and a target machine.
- Developing QNX Projects
  To use the QNX Toolkit to write applications targeted for QNX OS systems, you must define projects, which are folders in the filesystem. A VS Code workspace is a collection of these folders and VS Code settings defined by the .code-workspace file. QNX projects are saved to a folder defined in a your configuration (default location is ~/qnxprojects).
- Debugging and Launching
- Using the System Profiler
  You can use the System Profiler to render different types of trace analysis, such as graphs and tables.
  - Initiating kernel logging
    You can use kernel logging on a selected target. When you run the logging command, QNX Toolkit attempts to find a launch configuration for the selected target in the currently active Workspace. If none is found, then it creates the default launch configuration and runs it.
  - Managing traces
    Opening a trace file starts the Trace Server and opens the System Profiler.
  - Trace server
    The Trace Server is the heart of the QNX System Profiler. It includes state systems, analysis modules and data providers for the .kev (kernel event) tracing format that the System Profiler uses for its views.
  - Analysis views
    The QNX Toolkit System Profiler displays kernel event trace data. You can view different aspects of the application's activity and examine events within a specific time range in detail. There are also several views that list helpful information such as the Histogram, Timeline View, and CPU Usage View.
- References
  The reference topics provide information about QNX Toolkit features and workflows that isn't covered in the other chapters.
- Glossary
  To make best use of the QNX Toolkit, we recommend that you become familiar with the following terms, which are used throughout the user interface and documentation.
- Typographical Conventions, Support, and Licensing
  This section describes the typographical conventions used throughout the documentation and explains how to obtain technical support.

Using the System Profiler

Updated: November 27, 2023

You can use the System Profiler to render different types of trace analysis, such as graphs and tables.

Kernel tracing is an analysis activity in which the instrumented kernel on a target logs information about kernel events. This information shows what's happening on the target at a system-wide level, so you can eliminate performance bottlenecks and optimize the interaction of processes and threads.

In QNX Toolkit, the System Profiler component allows you to examine the data generated by kernel event traces. These data describe events such as:

kernel calls
interrupts
process and thread management activities
system events related to adaptive partitioning and memory mapping
context switches within a process
message passing and signaling

The System Profiler includes different analysis views such as CPU Usage View, Histogram, and Timeline View. You can re-arrange them by dragging and dropping, and you can re-size by dragging the corners of the individual views. You can close views to simplify the display. Clicking one of the views updates and synchronizes the data across all the views. In the Events Table view, you can re-arrange the columns by clicking and dragging them.

Overview view

The default view is Histogram, but you can change it to CPU Usage.

To change the Overview view:

Click the hamburger menu in the Overview panel of the System Profiler.
Click Select source output.
Click CPU Usage View or Histogram.
Click Close.

Navigation

You can use zoom, pan, and resizing and rearranging controls when you view traces with the System Profiler.

To view the complete list of navigation shortcuts:

From a running trace.kev file, click the three dots at top right.
Click Trace Viewer Keyboard and Mouse Shortcuts. A complete list of navigation shortcuts is displayed.

Export table to CSV

Several of the views include an export to CSV feature.

To export to CSV:

From a supported view (eg., Histogram), click the hamburger.
Click Export table to CSV. The data is exported in .csv format.