I'm working on a shared linux machine with multicores where I do have admin rights. Is it possible to freeze all the processes of other users (or give them less priority to access to the CPUs) so that I can leverage all the machine computing power?
It's unclear what you mean by steal cores; however, if your process isn't very nice, then the linux scheduler will give your application more computing time on the cores. Do you really have a threaded / multiprocessing application that can leverage more than one core at once?
Syntax (as root):
Another option is