Write a short note about schedulers, Operating System

Assignment Help:

Write a short note about schedulers.

Processes migrate between the various scheduling queues throughout its life time. The operating system should select for scheduling purposes, processes as of these queues in some fashion. The selection process is hold out by the appropriate Scheduler.

In a batch system habitually more processes are spooled to a mass-storage device where they are kept for later execution. The Job scheduler or Long-term scheduler selects processes from this pool and loads them into memory for implementation. The CPU scheduler or Short-term scheduler selects from among the processes that are ready to execute and allocates the CPU to one of them.

The primary distinction among these two schedulers is the frequency of their implementation. The short-term scheduler should select a new process for the CPU frequently. A process may implement for only a few milliseconds before waiting for an I/O request.

The long-term scheduler alternatively, implement much less frequently. There may possibly be minutes between the creations of new processes in the system. The long-term scheduler manages of the Degree of multiprogramming the number of process in the memory. If the degree of multiprogramming is steady after that the process leaves the system. Therefore the long-term scheduler may require to be invoked only when a process leaves the system. For the reason that the long interval between the executions the long-term scheduler is able to afford to take more time to select a process for execution.

 


Related Discussions:- Write a short note about schedulers

What is paging? name the different paging techniques, What is paging? Name ...

What is paging? Name the different paging techniques. Paging is a memory management method that permits the physical-address space of a process to be noncontiguous. Paging evad

Describe the purpose of the open and close operations, Q. Describe the pur...

Q. Describe the purpose of the open() and close() operations. Answer: The open() operation notifies the system that the named file is about to become active. The c

Calculate the average waiting time, Calculate the Average Waiting Time ...

Calculate the Average Waiting Time CPU burst time points out the time, the process needs the CPU. The subsequent are the set of processes with their respective CPU burst time (

Explain about directory structure, Normal 0 false false fal...

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

Structures for a file''s data, Q. Likewise some systems support many types ...

Q. Likewise some systems support many types of structures for a file's data while others simply support a stream of bytes. What are the merits in addition to demerits? Answer:

Operational management, explain the link between operations management and ...

explain the link between operations management and strategic planning of daily goods shop

Calculate the maximum file size , A UNIX file system has 1-KB blocks and 4-...

A UNIX file system has 1-KB blocks and 4-byte disk addresses. What is the maximum file size if i-nodes contains 10 direct entries, and one single, double, and triple indirect entry

What are the disadvantages of linked allocation, What are the disadvantages...

What are the disadvantages of linked allocation? The drawbacks are a. Used only for sequential access of files. b. Direct access is not supported c. Memory space neede

Determine a parser which is a variant of top-down parsing, Determine a pars...

Determine a parser which is a variant of top-down parsing without backtracking Recursive Descend parser is a variant of top-down parsing without backtracking.

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd