I have a Dell Inspiron 7520 with an Intel Core i7-3612QM CPU that repeatedly cycles through 100% usage of each individual core while barely using any other core as shown in the screen shot below.
This happens regardless of what I'm running and might be what's causing my laptop to heat up, how would I go about making my laptop use all of the cores concurrently?
I'm using Ubuntu 14.04 LTS
It's not possible to spread a single threaded processes over multiple cores evenly. A single threaded process can only run on one core at a given time and the kernel might move the process/thread to another core while the programm runs. If one process is running at 100% on one core all the time you should check for that process and why it is utilizing one core.