Thanks Andrew,
that's cool but it still does not prove me that it runs on a different core.
A quick startpage.com search https://www.startpage.com/do/search?cat=web&language=english&query=s... yielded these https://unix.stackexchange.com/questions/349908/how-to-get-all-processes-run... https://stackoverflow.com/questions/8032372/how-can-i-see-which-cpu-core-a-t... https://serverfault.com/questions/836922/how-to-get-all-processes-running-on... (untested)