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25 cze 2024 · First Come First Serve CPU Scheduling: Simplest scheduling algorithm that schedules according to arrival times of processes. First come first serve scheduling algorithm states that the process that requests the CPU first is allocated the CPU first. It is implemented by using the FIFO queue.
24 cze 2024 · CPU scheduling is the process of deciding which process will own the CPU to use while another process is suspended. The main function of the CPU scheduling is to ensure that whenever the CPU remains idle, the OS has at least selected one of the processes available in the ready-to-use line.
Scheduling in an operating system or elsewhere1 is a very interesting mix of complex engineering and theory. The purpose of this document is to describe the basics of queueing theory, which is a key approach to scheduling from a theoretical perspective, and to describe
4 wrz 2024 · CPU scheduling comprises many essential concepts. In this tutorial, we’ll discuss concepts central to CPU scheduling, including arrival, burst, completion, turnaround, waiting, and response time.
Scheduling Criteria. CPU utilization – keep the CPU as busy as possible. Throughput – # of processes that complete their execution per time unit. Turnaround time – amount of time to execute a particular process. Waiting time – amount of time a process has been waiting in the ready queue.
A process switches from new/waiting to ready state. A process terminates. Note that early schedulers were non-preemptive (e.g., windows. 3.x). It means that no scheduling decision was taken until the running process was explicitly releasing the CPU (case 1, 4 or 2 with yield()).
The Operating System maintains the following important process scheduling queues −. Job queue − This queue keeps all the processes in the system. Ready queue − This queue keeps a set of all processes residing in main memory, ready and waiting to execute. A new process is always put in this queue.
