Explain process description in the unix system, Operating System

Assignment Help:

Process Description

A process in UNIX is a somewhat complex set of data structures that provides the operating system with all of the information necessary to dispatch and manage processes. The elements of the process image are categorized into two parts. They are as system context and user level context.

The user level context encloses the fundamental elements of the user's program and can be generated directly from a compiled object file. The user's program is divided into text and data areas. The text area is read-only as well as it is intended to hold the program's instructions. While the process is implementing the processor uses the user stack area for procedure calls and returns and parameter passing. The shared memory area is a data area specifically shared with other processes. There is merely one physical copy of a shared memory area other than, by the utilize of virtual memory it appears to every sharing process memory region is in its address space. When a process isn't running then the processor status information is stored in the register context area.

The system level context encloses the remaining information that the operating system needs to manage the process.

It consists of a static part which is fixed in size and stays with a process throughout its lifetime and a dynamic part which vary through the life of the process. The one element of the static part is the process table entry. This is in fact part of the process table maintained by the operating system with one entry per process. The process table entry table process a control information i.e. accessible to the kernel at all times therefore in a virtual memory system all process table entries are maintained in main memory.

 

 


Related Discussions:- Explain process description in the unix system

Basic synchronization, (Add synchronization to your solutions to HW 3 to el...

(Add synchronization to your solutions to HW 3 to eliminate all of the race conditions.  You should not remove any of the sleep() commands that you used to produce the race conditi

Explain the concept of mutual exclusion, Question 1: (a) Discuss about...

Question 1: (a) Discuss about the evolution of operating systems from mainframe batch systems to mainframe time sharing systems. (b) Explain your understanding of the "sus

What are the various available scheme in ipc, Several schemes available are...

Several schemes available are as follows: Pipes : One-way communication process through which different process can interact. The problem is that the two processes could have

List disadvantages of using a single directory, List disadvantages of using...

List disadvantages of using a single directory. Users have no privacy. Users must be careful in choosing file names, to avoid names used by others. Users may destroy each othe

Why do systems stay track of the type of a file, Q. Why do some systems sta...

Q. Why do some systems stay track of the type of a file while others leave it to the user or simply don't implement multiple file types? Which system is "better?" Answer: A f

Concepts of an address - data and control bus, Let us consider the operatio...

Let us consider the operation of the EPROM device in more detail. Consider the pining details below again   Before we examine the interface means of the EPROM, it is worth

How virtual memory is implemented, How Virtual memory is implemented Vi...

How Virtual memory is implemented Virtual memory can be implemented along with Segmentation and Paging

Explain threads for executing concurrent application code, Explain Threads ...

Explain Threads for Executing Concurrent Application Code The thread has been introduced in many operating systems as an efficient mechanism for executing concurrent applicatio

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

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

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