Developer Guide

  • 2021.3
  • 11/18/2021
  • Public


You can run the frequency discipline sample with command-line options. This guide provides examples of commands and outputs. Before running the sample, make sure you have completed the following setup.


  • This guide is based on a host-target setup. Confirm that you have a host system and a target system that are configured according to the Get Started Guide for UEFI BIOS or Get Started Guide for Slim Bootloader.
  • A logic analyzer is used to capture data for analysis. The data in the following examples was captured with the Saleae* Logic Pro 16 logic analyzer. Logic analyzer specifications:
    • Sample rate: 500 MegaSamples/second (MS/s)
    • Maximum signal frequency: 100 MHz
    The specifications of the logic analyzer may affect the results.

Confirm Real-Time Kernel

Confirm that the target system is running the real-time kernel.
  1. From your host system, connect to the target system:
    ssh <user>@<target>
  2. In the SSH session, run the following command to run
  3. In the output, find the
    RT Kernel Checker
    row and confirm that it contains
    +-----+-------------------+--------------------------+----------------------+----------+ | 4 | RT Kernel Checker | Checks that RT kernel is | Current kernel is RT | RT_READY | | | | used | | | +-----+-------------------+--------------------------+----------------------+----------+
  4. If the
    RT Kernel Checker
    row does not report
    , reboot the target system and make sure to select the RT kernel.

Build the Sample

The Intel® TCC Tools package for the target system contains a prebuilt binary of this sample. The binary is configured to run from any directory on the target system.
If you want to build the sample, use the provided makefile.

Run the Sample

After completing the setup, run the sample:

Product and Performance Information


Performance varies by use, configuration and other factors. Learn more at