Determine different applications of operating system regarding system performance and system stability?

 

In any computer, the operating system:

Controls the backing store and peripherals such as scanners and printers.

Deals with the transfer of programs in and out of memory.

Organizes the use of memory between programs.

Organizes processing time between programs and users.

Maintains security and access rights of users.

Deals with errors and user instructions.

Allows the user to save files to a backing store.

Provides the interface between the user and the computer - for example, Windows Vista and Apple OSX. For more information, see the User Interfaces study guide.

Issues simple error messages.

In a larger computer such as a mainframe the operating system works on the same principles.

When the computer has to react within a guaranteed time to an input, a real-time operating system (RTOS) is used. For example, the engine management system within a car uses a real-time operating system in order to react to feedback from sensors placed throughout the engine.

 

A real-time operating system does not necessarily have to be fast. It simply has to be quick enough to respond to inputs in a predictable way. Embedded computers often contain an RTOS as many are used to control something.

 

Computers operating in real time are often dedicated to the control of systems such as industrial processes, planes and space flights.

 

Multi-programming

Multi-programming is a method of operating such that several programs appear to be running at once.

The operating system switches jobs in and out of processor time according to priority. For example, while one job is being allocated printer time, another will be being processed in memory. The processor is so fast that it seems that many jobs are being processed at the same time.

Batch processing

A batch processing system is where programs or data are collected together in a batch and processed in one go. Typically the processing of payrolls, electricity bills, invoices and daily transactions are dealt with this way.

 

This method of operation lends itself to jobs with similar inputs, processing and outputs where no human intervention is needed. Jobs are stored in a queue until the computer is ready to deal with them. Often batch processed jobs are done overnight.

Interactive processing

An interactive processing system is where the tasks on the computer system require a continual exchange of information between the user and the computer system. It can be seen as the opposite of batch processing.

Multi-tasking

This isn't just about running more than one application at the same time. Multi-tasking allows multiple tasks to run concurrently, taking turns using the resources of the computer.

 

This can mean running a couple of applications, sending a document to the printer and downloading a web page.

 

Multi-access or multi-user

Modern personal computers can allow multi-user access. A multi-access (or multi-user) system is one where several users can use the same system together via a LAN.

 

The CPU deals with users in turn; clearly the more users, the slower the response time. Generally, however, the processor is so fast that the response time at the most is a fraction of a second and the user feels they are being dealt with immediately.

 

Comments

Post a Comment

Popular posts from this blog

Explain with the help of an example the distributed Coordination in OS?

  Definition   – In this article, we will fully  explain distributed operating system . Distributed operating system allows distributing of entire systems on the couples of center processors, and it serves on the multiple real time products as well as multiple users.   All processors are connected by valid communication medium such as high speed buses and telephone lines, and in which every  processor  contains own loca l  memory  along with other local processor. According this nature, distributed operating system is known as loosely coupled systems. This  operating system  involves multiple computers, nodes, and sites, and these components are linked each other with LAN/WAN lines. Distributed OS is capable for sharing their computational capacity and I/O files with allowing the virtual machine abstraction to users. Types of Distributed Operating System Classification of distributed operating system  Can be done in thr...
Read more

A BRIEF HISTORY OF COMPUERS:

Image
First Generation: Vacuum Tubes  ENIAC The ENIAC (Electronic Numerical Integrator And Computer), designed and constructed at the University of Pennsylvania, was the world’s first general-purpose electronic digital computer. The project was a response to U.S needs during World War II. John Mauchly, a professor of electrical engineering at the University of Pennsylvania, and John Eckert, one of his graduate students, proposed to build a general-purpose computer using vacuum tubes for the BRL’s application. In 1943, the Army accepted this proposal, and work began on the ENIAC. The resulting machine was enormous, weighing 30 tons, occupying 1500 square feet of floor space, and containing more than 18,000 vacuum tubes. When operating, it consumed 140 kilowatts of power. It was also substantially faster than any electromechanical computer, capable of 5000 additions per second. The ENIAC was completed in 1946, too late to be used in the war effort. The use of the ENIAC for a pur...
Read more

State the main difference in Microsoft windows GUI and MAC GUI?

  In present times, it is not uncommon to have a desktop with two or more monitors. How these operating systems perform in a multiple monitor environment is an interesting topic. In this work, we will evaluate the efficiency of and compare how two popular operating systems, Windows and Mac OS, perform in large and multiple monitor environments. In particular, we will evaluate the performance of menu bars in both operating systems as they serve a near identical purpose and have the same functionality while providing their offerings differently. It is well-known that Mac OS uses a menu bar at the top of the screen (global) and Windows uses a menu bar attached to the top of its respective application (local).  The conducted user study shows that the overall performance of Windows menu bar was better than that of the Mac menu bar implementation in the conducted tests .
Read more