Assignment on Fork System Call, Operating System

Assignment Help:
Parent process P creates three child processes, C1, C2, and C3. Each child process executes a
memory and CPU intensive application of your choice. Your choice should be such that the children
execute for considerable periods of time and acquire considerable amount of memory (say, on the stack
or on the heap).
The parent process P wants to periodically monitor the status of its children to determine: • are each of the three children, C1, C2, and C3 alive? • what is the CPU utilization of each child process? • what is the memory usage of each child process?
Note that P received the PIDs of C1, C2, C3, during the fork() system call. In order to obtain the
periodic status, P does the following:
(a) It periodically forks a child, M, creates a pipe with it, and redirects the standard output of M to
the pipe (that is, when M writes to stdout it can be read by P from the pipe). The monitoring
interval can be implemented with the sleep command.
(b) Once M is created, it chooses a suitable system call from the exec family to execute the “ps”
command with suitable arguments (thereby writing its output into the pipe with its parent P).
Thereafter M terminates.
(c) P reads the output of M from the pipe, finds the entries corresponding to C1, C2, and C3 (that
is, if they are alive) and extracts their respective CPU and memory utilizations (in percentage,
as reported by “ps”). P writes the timestamp and the information extracted in the terminal.
(d) When P finds that C1, C2, and C3 are not present in the listing of “ps”, it writes “All children
have terminated” and stops.
Please study the syntax and arguments of “ps” carefully so that you execute it with the optimal set of
arguments.
You need to submit the following:
1. The C program for P
2. The applications run by C1, C2, C3. These must be made available in a form that the TA can
run your system in your absence

Related Discussions:- Assignment on Fork System Call

Advantages and disadvantages of thread, OPERATING SYSTEM 1. Describe th...

OPERATING SYSTEM 1. Describe the term operating system. Write down the functions of operating system. 2. Explain Thread? Write down the advantages and disadvantages of threa

Custom memory allocation, Some people write custom memory allocators to mee...

Some people write custom memory allocators to meet their speci?c needs. Although this is not needed for most of the applications, it is also not uncommon. The goal, of course, is t

Determine what a locality of reference entails, Locality of reference entai...

Locality of reference entails that the page reference being made by a process  Locality of reference entails that the page reference being made by a process is similarly to be

Define busy waiting and spinlock, Define busy waiting and spinlock. Whe...

Define busy waiting and spinlock. When a process is in its significant section, any other process that tries to enter its critical section must loop continuously in the entry c

What is the benefits os co-operating process, What is the benefits OS co-op...

What is the benefits OS co-operating process? Information sharing. Computation speeds up. Modularity. Convenience.

Define loader that executed when system is first turned on, Define a loader...

Define a loader that is executed when a system is first turned on or restarted? Bootstrap loader is executed when a system is first turned on or restarted

Explain process scheduling in multiprogramming, Normal 0 false ...

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

Financial objective of corporation, The primary financial objective of corp...

The primary financial objective of corporation is usually taken to be the maximization of shareholder wealth. Discuss:- i. Ways in which the shareholder of a company can encour

Define an assembly language, Define an assembly language  Assembly lan...

Define an assembly language  Assembly language stands for a Low level programming language

Bind a real-time thread to an lwp, Q. Suppose an operating system maps user...

Q. Suppose an operating system maps user-level threads to the kernel utilizing the many-to-many model where the mapping is done through the use of LWPs. In addition the system allo

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