Multi-core processors exploits thread level parallelism, it means that multiple threads runs in parallel. Suppose, a process has only one thread then, do the other cores remain idle during the execution of this process? In linux system, scheduler consider processes and threads both as a task. It doesn't differentiate between process and thread while scheduling it. So, does this means that different cores executes different threads of different processes in parallel?
When context-switch happens, does this happen only for one core or for all the cores of the cpu?