What are the basic concepts of CPU scheduling?
CPU Scheduling is a process of determining which process will own CPU for execution while another process is on hold. The main task of CPU scheduling is to make sure that whenever the CPU remains idle, the OS at least select one of the processes available in the ready queue for execution.
What is CPU scheduling and its types?
Types of CPU Scheduling algorithms
- First Come First Serve.
- Shortest Job First.
- Shortest Remaining Time First.
- Round Robin Scheduling.
- Priority Scheduling.
- Multilevel Queue Scheduling.
- Multilevel Feedback Queue Scheduling.
What is a CPU scheduler?
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.
What is basic scheduling concept?
CPU scheduling is a process that allows one process to use the CPU while the execution of another process is on hold(in waiting state) due to unavailability of any resource like I/O etc, thereby making full use of CPU. The aim of CPU scheduling is to make the system efficient, fast, and fair.
What are the criteria of scheduling?
Various criteria or characteristics that help in designing a good scheduling algorithm are: CPU Utilization − A scheduling algorithm should be designed so that CPU remains busy as possible. It should make efficient use of CPU. Throughput − Throughput is the amount of work completed in a unit of time.
Which is the best CPU scheduling algorithm?
The simplest best-effort scheduling algorithms are round-robin, fair queuing (a max-min fair scheduling algorithm), proportionally fair scheduling and maximum throughput.
Which CPU scheduling is best and why?
The FCFS is better for a small burst time. The SJF is better if the process comes to processor simultaneously. The last algorithm, Round Robin, is better to adjust the average waiting time desired.
What are the three scheduling methods?
The three scheduling techniques that are going to be explained in this articles are PERT, CPM and Gantt. Both three help planners, managers and stakeholders to visualise the development of projects into details and steps.
What are the 3 different types of scheduling queues?
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.
- Device queues − The processes which are blocked due to unavailability of an I/O device constitute this queue.
What are scheduling algorithms?
Definition: A Scheduling Algorithm is the algorithm which tells us how much CPU time we can allocate to the processes. These scheduling algorithms are either preemptive or non-preemptive. Preemptive Scheduling Algorithms are those which are based on the priority of the processes.
