What is a process control block?, Operating System

Assignment Help:

What is a Process Control Block?

Every process in the operating system is represented by a process control block as well called a task control block. It contains several pieces of information associated with a specific process such as

  • Process state: The state perhaps new, ready, running, and waiting, halted and etc.
  • Program counter: The counter point to the address of the next instruction to be executed for this process.
  • CPU registers: The registers differ in number and type, depending on the computer architecture. They comprise index registers, accumulators, stack pointers and general purpose registers plus any condition code information. Along with PC, this state information has to be saved when an interrupt occurs, to permit the process to be continued correctly afterward.
  • CPU scheduling information: This information comprises a pointer to scheduling queues, process priority and any other scheduling parameters.
  • Memory management information: this information may comprise such information as the value of the base and limit registers the page tables or the segment tables depending on the memory system used by the OS.
  • Accounting information: It comprise information about the amount of CPU and time limits, account numbers, real time used, job or process numbers and so on.
  • I/O status information: The information comprises the list of I/O devices allocated to this process, a list of open files and so on.

 


Related Discussions:- What is a process control block?

Briefly discuss on page replacement, Briefly discuss on page replacement? ...

Briefly discuss on page replacement? Page replacement approach is fixed as follows. If no frame is free, we search one that is not presently being used and free it. We can fre

Define a election algorithm, Consider a setting where processors are not as...

Consider a setting where processors are not associated with unique identifiers but the total number of processors is known and the processors are organized along a bidirectional ri

Define computer system environment, Q. List three instances of deadlocks th...

Q. List three instances of deadlocks that aren't related to a computer system environment. Answer: Two cars passage a single-lane bridge from opposite directions.

Write note on process, Write note on process, process state? A process ...

Write note on process, process state? A process is in excess of the program code which is sometimes known as text section. It as well includes the current activity as represent

Why global variables are unacceptable, Why Global variables are unacceptabl...

Why Global variables are unacceptable Global variable, for instance, are unacceptable because they break the rules of self - containment. If all procedural components are runni

Write a short note about schedulers, Write a short note about schedulers. ...

Write a short note about schedulers. Processes migrate between the various scheduling queues throughout its life time. The operating system should select for scheduling purpose

What is the use of inter process communication, What is the use of inter pr...

What is the use of inter process communication. Inter process communication gives a mechanism to allow the co-operating process to communicate with each other and synchronies t

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

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

General graph directory system in shell sort, we need an information about ...

we need an information about the different graph directory systems in detail by using shell sort . we also application part of directory systems in practical life. please help us i

Control the access of the three global variables, Give a brief introduction...

Give a brief introduction about the operation of your program and show that you understand the idea behind threads and mutual exclusion variable. Why do we need to use mutual exclu

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