Does hyperthreading have an bad impact on a core which is fully occupied I have been learning for an exam and try to understand hyperthreading. Lets suppose we have a physical core with hyperthreading, Thread A and B. Let's also suppose thread A has fully occupied the physical core. Is there a chance to switch to Thread B duo to HT and if so can that have an bad impact at Thread A or B besides the case they want to use the same recourse. I know, that if both want to use the same recourse like same ALU, one of then has to wait for the other, but is there another...