Sign up ×
Ask Ubuntu is a question and answer site for Ubuntu users and developers. It's 100% free.

How can I find out which process/application uses Core number 4?

As I saw in Htop there isn't any application which uses high CPU, but still my fan is running "wild" and also the CPU graphic in Htop is 100%.


share|improve this question
I don't know how to determine which process runs on a specific core, but I had a similar case once where 'System Monitor' didn't show all processes. Usually '(sudo) top' should list everything including the process which maxed out your 4th core. – jhscheer Mar 5 '14 at 17:38
I've found out. I have opened System Monitor --> Processes --> View All Processes. After that I've seen that the "apport" process was eating around 80%. – vasiauvi Mar 5 '14 at 17:40

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Browse other questions tagged or ask your own question.