1. A computer system for facilitating management of threads in a computing environment, said computer system comprising: a memory; and a processor in communications with the memory, wherein the computer system is configured to perform a method, said method comprising: detecting, by a hardware controller of the computing environment, a change in state of a first processor, wherein the state relates to at least one thread of the first processor; and based on the detecting, providing an indication by the hardware controller to an entity of the computing environment that one or more threads of the first processor are to be migrated from the first processor to at least one second processor to enable at least one of the first processor or another processor to transform from a multithreading processor mode to a single thread processor mode.