Windows
Windows implements a preemptive, preemptive scheduling system – runnable threads with the highest priority always run, and the thread may be limited to running on a processor that allows it to run, a phenomenon called a processor Affinity, in the default case, the thread can run on any free processor, but you can use the windows dispatch function, or set an affinity mask in the image header to change the processor affinity. Windows process scheduling code is under its System process,