@matyi-szabolcs Hey, I also have the N100. You can monitor CPU freq via pfSense command line using this command:
while ( 1 )
clear
sysctl dev.cpu | grep freq:
sleep 1
end
Paste that as-is directly into the pfSense shell (using the terminal not UI).
It'll refresh every second and show you all core frequencies like:
dev.cpu.0.freq: 1800
dev.cpu.1.freq: 1600
...
Then you can do something CPU heavy like restart Suricata or something.