This tool is highly inspired from Brendan Greg's msr-cloud-tools (https://github.com/brendangregg/msr-cloud-tools).

Usage

First, build the readfreq binary with make.

Monitor the frequency of cpu each interval second (optionnal, defaults to 0.1s) and store results in output_dir, with some metadata:

   ./log_freq.sh cpu output_dir [interval]

Plot the frequency over time (output should be a .pdf, input_dir is the output_dir from the previous command):

   ./plot.py input_dir output

You can see the test_apps/test_loop.sh script for an exemple of how to use this tool (you will have to build the loop binary for this script to work).