ftalat : Frequency Transition Latency Estimator
ftalat allows you to determine the time taken by your CPU to switch from one frequency to another one.
make
or
make trace
to compile a second version of ftalat writing latency for each run of the kernel. A graph of this data can be displayed using the GNUPlot script traceViewer.gnuplot
./ftalat startFreq targetFreq
where startFreq is the frequency at the beginning of the test and targetFreq the frequency to switch to
The program will output the time taken by your CPU to swtich from startFreq to targetFreq
ftalat must be run with enough permissions to access cpufreq files
The script ftalat_runner.sh allows you to run the test for all frequencies couple for your CPU. The script will write the output in a folder Results
From the files written in the Results folder, you can generate graphs. To do this, you need to use the python scripts from the script folder.
./extract.py data_folder output_folder
data_folder should be 'Results' folder
output_folder is a new folder (which has to be created before) where the proceed files will be stored.
Then, you have to run
./generateGraph.py input_folder file
where input_folder is the folder where the files generated by extract.py are located
and file, the name of the file (without extension) for graph output (PDF) and latency table (a GNUPlot script is also generated)
You must have python (2.7) and GNUPlot installed
The program is licenced under GPLv3. Please read COPYRIGHT file for more information