linux_clock_test

To build, use gcc:

gcc linux_jitter.c -o linux_jitter

Purpose

The purpose of this simple utility is to check the integrity of the system clock versus the tick count on the CPU. If the system clock gets skewed (by a clock sync protocol for example), this utility will show the skew relative to the tick count of the CPU.

Executing the Test

Simply run the compiled binary, and pipe the output to a file. It will print baseline time measurements based on its sleep cycle, and print any skews that are off by 10% of the baseline.

Configuring the Test

Linux Jitter Usage: [-h help] [-b baseline-iterations] [-n notify-threshold] [-s sleep-interval]
Available options:
    -h       Display help
    -b       Number of baseline iterations (Default=100)
    -n       Notify threshold percent(default=10)
    -s       Duration of the sleep interval in milliseconds (Default=5ms)