NOAA Scientists Study Historic âDust Bowlâ and Plains Droughts for Triggers. Knowing Different Global Causes Could Aid Future Drought Warnings. The remains of a cornfield after grasshoppers had completed the destruction begun by the Drought of 1931-1932 in Montana, North Dakota, South Dakota, Nebraska, and Washington.
The short-term scheduler (also known as the CPU scheduler) decides which of the ready, in-memory processes is to be executed (allocated a CPU) after a clock interrupt, an I/O interrupt, an operating system call or another form of signal.
First-Come, First-Served Scheduling. Possibly the most straightforward approach to scheduling processes is to maintain a FIFO (first-in, first-out) run queue. New processes go to the end of the queue. When the scheduler needs to run a process, it picks the process that is at the head of the queue. This scheduler is non-preemptive.