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

Unix operating system, A working Ubuntu Linux operating system.  You can us...

A working Ubuntu Linux operating system.  You can use a Live-CD to complete this assignment. Create an empty text file named assignment6.txt in your home directory. Edit this

Explain the network protocols, Explain the Network protocols There are ...

Explain the Network protocols There are a wide variety of network protocols to choose from traditionally client - server developers were required to choose a communications pro

Operation management, #question After working for 30 years, Ramjee Somjee D...

#question After working for 30 years, Ramjee Somjee Dutt opted for VRS and started a courier company and did very well in the first four years. He was now looking for expansion of

Identifying parallelism, Identifying parallelism A formal way to identi...

Identifying parallelism A formal way to identify parallelism in an activity is to draw a task dependence graph in a directed graph in which each vertex represents a task to

Program, i need the job to be done within 3days

i need the job to be done within 3days

What are tree-structured directories, What are Tree-structured directories ...

What are Tree-structured directories We can generalize the directory structure to a tree of arbitrary height. This permits the user to create their own sub directories and to c

How relocation bits used by relocating loader are specified, Relocation bit...

Relocation bits employed by relocating loader are specified by Relocation bits employed by relocating loader are specified by Assembler or Translator

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

What is a latency time, What is a Latency Time Latency Time is the time...

What is a Latency Time Latency Time is the time required through a sector to reach below read/write head.

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