Editing Thread (computing) (section)

===Preemptive vs cooperative scheduling===
Operating systems schedule threads either [[Preemption (computing)|preemptively]] or [[Cooperative multitasking|cooperatively]]. [[Operating system#Single- and multi-user| Multi-user operating systems]] generally favor [[preemptive multithreading]] for its finer-grained control over execution time via [[context switch]]ing. However, preemptive scheduling may context-switch threads at moments unanticipated by programmers, thus causing [[lock convoy]], [[priority inversion]], or other side-effects. In contrast, [[cooperative multithreading]] relies on threads to relinquish control of execution, thus ensuring that threads [[Run to completion scheduling |run to completion]]. This can cause problems if a cooperatively multitasked thread [[Blocking (computing) |blocks]] by waiting on a [[Resource (computer science)| resource]] or if it [[Starvation (computer science) |starves]] other threads by not yielding control of execution during intensive computation.